2024 Mosquito Forecast

As we navigate through the complexities of our changing climate, it’s crucial to stay informed about the potential impact on mosquito populations and the associated risks of mosquito-borne diseases. At Ehrlich Pest Control, we’re dedicated to providing you with the latest insights and forecasts to ensure your safety and peace of mind.

Mosquito Forecast for 2024: What to Expect

Eric Sebring Ehrlich Entomologist

Mosquitoes, far from being mere annoyances, are vectors for a range of serious diseases. In the U.S., the West Nile virus continues to be the most common disease transmitted to humans by mosquitoes. Despite advancements in prevention and control, mosquito-borne illnesses still pose a significant threat, affecting thousands annually, with severe cases leading to hospitalization and, unfortunately, some fatalities.

Climate’s Role in Mosquito Activity

The prevalence and activity levels of mosquitoes are closely tied to climate conditions. These pests thrive in warm, humid environments, typically where temperatures soar above 80 degrees Fahrenheit. They enter a state of dormancy in cooler, drier climates, especially when temperatures dip below 50 degrees Fahrenheit. Mosquito breeding is facilitated by standing or stagnant water, with their eggs capable of maturing into adults in just a few days under optimal conditions.

Weather Patterns and Mosquito Populations

The intensity of mosquito seasons is largely influenced by weather patterns. A colder, prolonged winter season, with temperatures consistently below 50 degrees Fahrenheit, can lead to diminished mosquito populations. On the other hand, rainfall plays a pivotal role in increasing mosquito numbers by providing ample breeding grounds through standing water, particularly with extended periods of rain in late winter and early spring.

2024 Mosquito Season Outlook

Looking ahead to 2024, current forecasts suggest a trend towards a longer and colder winter, which could result in a less severe mosquito season compared to recent years. This shift may lead to reduced mosquito activity and, consequently, a decreased risk of mosquito-borne diseases.

Staying Ahead of Mosquito Threats

As we continue to monitor climate trends and environmental changes, the importance of proactive mosquito prevention and control measures cannot be overstated. At Ehrlich Pest Control, our local technicians, equipped with industry-leading knowledge and state-of-the-art technology, are committed to providing customized solutions to protect you and your loved ones from the risks posed by mosquitoes.

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Mosquitoes In the Northeast

The Northeast, encompassing states from Maine to Maryland and extending west to Pennsylvania, is characterized by its cold winters and humid summers, alongside significant annual snowfall and rainfall. This region’s diverse ecosystems, including wetlands, grasslands, coastal zones, and fisheries, create ideal conditions for mosquito proliferation. Mosquito activity in this area typically commences in late April, continuing through the end of October.

Given the health risks posed by mosquitoes, including the transmission of dangerous diseases, it is crucial to prioritize protective measures during peak mosquito seasons. In recent years, the Northeast has reported cases of West Nile virus, Jamestown Canyon virus, Saint Louis encephalitis, and La Crosse encephalitis, underscoring the importance of vigilance and prevention.

2024 Mosquito Season Insights for the Northeast

The latest forecasts, drawing on data from sources like the Old Farmer’s Almanac, anticipate a cooler start to spring in 2024, with a gradual warm-up and increased precipitation levels. The summer and fall months are expected to experience warmer than average temperatures, accompanied by periodic heavy rainfall. These conditions may contribute to an above-average mosquito activity level throughout the region.

The anticipated weather patterns for 2024, including the warmer and wetter summer and fall, could extend the mosquito season slightly longer than in previous years. This extended period of favorable mosquito breeding conditions underscores the need for heightened awareness and proactive measures to control mosquito populations and protect against mosquito-borne diseases.

Mosquito Season

Late April to Early May
Late October to Early November

Mosquito Forecast

Expected Mosquito Activity: Above average

Weather Outlook

Cooler start with a gradual warm-up; increased rainfall
Summer and Fall:
Warmer than average temperatures; periodic heavy rainfall

Types of Mosquitos

Northern House Mosquito
Yellow Fever Mosquito
Eastern Tree Hole Mosquito
Asian Tiger Mosquito

Mosquitoes In the Southeast

The Southeast region, stretching from the sunny shores of Florida to the mountainous terrains of West Virginia and Virginia, and extending westward to Arkansas and Louisiana, is known for its generally mild climate. However, the proximity to the Atlantic Ocean and the Gulf of Mexico introduces high humidity and frequent thunderstorms, creating an ideal environment for mosquitoes, particularly in the warmer and wetter areas like Florida.

Mosquito-borne diseases remain a concern in the Southeast, with vectors in Alabama and Florida known to carry Eastern Equine Encephalitis and Saint Louis Encephalitis. La Crosse Encephalitis has been identified in Alabama, while the West Nile virus continues to be a threat across the region. Additionally, the Jamestown Canyon Virus has been detected in Georgia, underscoring the diverse range of pathogens that mosquitoes in this area can transmit.

2024 Southeast U.S. Mosquito Forecast

The forecast for 2024 predicts a shift towards warmer and wetter conditions across the Southeast, contrasting with the cooler, drier summer experienced in 2021. This change is expected to lead to an increase in mosquito populations due to more abundant standing water from rainfall, providing ample breeding grounds for mosquitoes.

Spring is likely to start warmer than usual, with higher than average rainfall, setting the stage for an early onset of the mosquito season. The summer months are forecasted to be particularly warm and humid, further accelerating mosquito breeding and activity. While July and August may bring the peak of heat, they also carry the risk of hurricanes and tropical storms, potentially exacerbating mosquito breeding conditions.

The fall season is expected to remain warmer for longer, with precipitation levels above average, potentially extending the mosquito season beyond its usual bounds.

Given these conditions, the Southeast U.S. faces a year of increased vigilance against mosquito-borne diseases. Residents and visitors alike are encouraged to adopt proactive mosquito prevention measures, such as eliminating standing water, using insect repellents, and ensuring homes are fortified against mosquito entry.

Mosquito Season

Late February to Early April
Late October to Early November

Mosquito Forecast

Increased mosquito activity is anticipated due to warmer and wetter conditions.

Weather Outlook

The Southeast is expected to experience a warmer and wetter summer than average, contributing to heightened mosquito activity.

Types of Mosquitos

Southern mosquito
Northern house mosquito
Yellow fever mosquito
Asian tiger mosquito

Mosquitoes In the Midwest

The Midwest, stretching from the U.S./Canadian border in the north to Kansas in the south, and from North Dakota in the west to Ohio in the east, experiences a wide range of weather conditions. The region is known for its frigid winters and hot, humid summers, with the vast open plains making it prone to tornadoes and windstorms.

Despite the typically cold winters that help to reduce mosquito populations, the expected warmer and more humid conditions in 2024 are likely to provide an ideal breeding environment for mosquitoes. These conditions can facilitate the survival and proliferation of mosquitoes, potentially leading to an increase in mosquito-borne diseases. In the Midwest, diseases such as West Nile virus, Jamestown Canyon Virus, and Eastern Equine Encephalitis have been historically reported, with cases commonly found in states like Minnesota, Wisconsin, Indiana, and Michigan.

2024 Outlook for the Midwest

For 2024, the mosquito season in the Midwest is projected to start earlier than usual, thanks to milder winter temperatures and an early onset of warmer spring weather. The season is expected to extend into late October, with higher than average mosquito activity due to the warmer and more humid conditions forecasted throughout the year.

This year, we anticipate an increase in the populations of the Western encephalitis mosquito, Northern house mosquito, and the invasive Asian tiger mosquito, which is known for its aggressive daytime biting behavior. The combination of higher temperatures and increased humidity is likely to enhance breeding opportunities for these species, elevating the risk of mosquito-borne diseases in the region.

Mosquito Season

Late March to Early May
Late October

Mosquito Forecast

Activity Level: Expected to be higher than average

Weather Outlook

General Forecast: Anticipated to be warmer with increased humidity throughout the year

Types of Mosquitos

Western encephalitis mosquito
Northern house mosquito
Asian tiger mosquito

Mosquitoes In the Southwest

As we delve into the mosquito season forecast for the Southwest United States in 2024, it’s essential to understand the unique climate and environmental conditions of this region. Stretching from Texas and Oklahoma west to Arizona and Utah, and north to Montana, with its eastern border along Wyoming and Colorado, the Southwest is known for its warm temperatures and low precipitation levels. This area stands out as the hottest and driest region in the country, which significantly influences mosquito activity and the potential for disease transmission.

2024 Specific Forecast

Given the warmer and occasionally wetter conditions expected in 2024, residents of the Southwest should prepare for a mosquito season that could be more robust than in previous years. The slight increase in rainfall during the summer could enhance breeding conditions for mosquitoes, potentially leading to higher mosquito populations and an increased risk of disease transmission.

Mosquito Season

Late February to Early April
Late October to Mid-November

Mosquito Forecast

Slight deviation from recent trends

Weather Outlook

Hotter and slightly wetter than average

Types of Mosquitos

Southern mosquito
Northern house mosquito
Yellow fever mosquito
Asian tiger mosquito

Mosquitoes In the Northwest

The Northwest, encompassing states in the far northwest corner of the U.S., remains a focal area for mosquito activity due to its unique geographic and climatic conditions. The proximity to the Pacific coastline and varied weather patterns, including consistent rainy periods, create an environment where mosquitoes can thrive.

Mosquito Vectors in the Northwest

In the Northwest, mosquito vectors are known carriers of diseases such as West Nile virus, Western Equine Encephalitis, and St. Louis Encephalitis, posing health risks to humans and animals alike. The diversity of mosquito species in this region reflects the varied habitats and climates they adapt to, from urban areas to marshlands.

2024 Mosquito Season Outlook

For 2024, the mosquito season in the Northwest is expected to commence in late April and extend through mid-October. Weather forecasts predict variable conditions, with a general trend towards warmer and wetter weather than in previous years. This shift is likely to influence mosquito breeding patterns, potentially leading to average to above-average mosquito activity throughout the region.

The anticipated warmer and wetter conditions, especially during the summer months, could enhance mosquito breeding sites and prolong the mosquito season. Experts suggest that periods from late June through early September may experience the highest mosquito activity, with an increased risk of mosquito-borne diseases.


Mosquito Season


Mosquito Forecast

Average to Above Average Mosquito Activity

Weather Outlook

Variable Seasons with a Trend Towards Warmer and Wetter Conditions

Types of Mosquitos

Northern House Mosquito
Western Tree Hole Mosquito
Summer Salt Marsh Mosquito
Floodwater Mosquito

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How Does Weather Affect Mosquitoes?

The warmer and wetter it is, the more likely it will be for you to have mosquitoes. They thrive in moist, tropical climates, but can live and breed anywhere it’s warm and wet. That’s why you will find them in all 50 states.

Mosquitoes can successfully lay and breed their eggs in just a few inches of water. They will use something as big as a pond or something as small as a puddle. Female mosquitoes can lay between 50 to 200 eggs, and the four stages of the mosquito life cycle (egg, larva, pupa, and adult) takes only eight to 10 days to complete.

Even though mosquitoes prefer warm temperatures, they are less likely to bite you the hotter it gets. But when they do decide to bite in extreme heat, it can make the diseases they carry more transmissible. Weather below 50 degrees Fahrenheit causes mosquitoes to become inactive. And while rainfall can increase mosquito infestations, precipitation can also disturb eggs that have already been laid and keep them from growing into adults.

Which Seasons are the Worst for Mosquitoes?

Mosquitoes can appear as early as February and as late as November. Spring, summer, and fall are all seasons that these pests can breed and become a nuisance. In regions like the Northwest and Midwest, where it rains often, a mosquito infestation can be problematic during the spring. But across most of the United States, mosquitoes are at their peak during the hot months of summer.

But it’s important to know that mosquitoes can emerge at any time of year. can come out of hibernation and become active when temperatures consistently reach 50 degrees Fahrenheit, meaning that mosquito eggs can hatch during the winter. So, no matter the season, it’s best to protect yourself year-round.

How to Prevent Against Mosquitoes

No one enjoys mosquitoes buzzing in their ears or having itchy, red bumps they can’t help but scratch. Being bitten by a mosquito is uncomfortable, but some carry dangerous diseases, such as the West Nile Virus, Dengue, and Malaria. That’s why  it’s crucial to protect you and your loved ones from mosquitoes, especially from July to September during their peak feeding season. 

Prevention is key, so follow these important steps to cut down on the likelihood of mosquitoes in and around your property.

Lawn Care

  • Remove standing or stagnant water around your home
  • Do not overwater your lawn – mosquitoes breed in areas with standing water
  • Keep grass cut low – mosquitoes can’t hide in short grass
  • Use citronella candles or tiki torches around areas where you spend time outside
  • Change birdbath water regularly
  • Keep gutters clean
  • Buy mosquito-repellent plants, including geraniums,marigolds and lemon grass

Personal Care

  • Wear pants, socks and long-sleeved shirts outside at dusk
  • Use EPA-certified insect repellents 
  • Stay inside during peak times – mosquitoes are more prevalent during dusk and dawn

Pet Care

  • Use dog-friendly insect repellent 
  • Keep water bowls inside at times when mosquitoes are most prevalent
  • Avoid having your pets outside during peak mosquito hours

One of the best and most consistent ways to protect yourself and your loved ones from mosquitoes is by using a professional pest control service. Technicians are trained to find infestations and have powerful methods to eliminate them. Most of them use eco-friendly sprays and chemicals and effective mosquito traps. They can cover large areas of your yard with year-round treatments, get rid of mosquito larvae before it hatches and eliminate breeding grounds on your property.

Diseases that Mosquitoes Carry

Mosquitoes are a nuisance because of the bothersome itchy, red welts they leave you with. But they are dangerous because of the diseases they carry and can pass along to you or your family. The Centers for Disease Control and Prevention says many who become infected by a mosquito-borne illness will not have symptoms or become sick, those who do become ill may experience a “mild, short-term illness.” More severe illnesses are possible but rare. Some of the most common diseases that mosquitoes carry and can pass along include:

Zika Virus

A urine or blood test is needed to determine if you have the Zika virus. While many people with this virus won’t have symptoms, others will experience a fever, muscle and joint pain, headache, rash, and red eyes. These symptoms can last from a few days up to a week. This virus is typically transmitted through an infected Aedes species mosquito. According to Statista,California, Georgia, Idaho, Nebraska, Nevada, New Jersey, Oregon, Texas, Utah, and Virginia reported cases of this virus in 2019.This is a much lower number in comparison to the more than 400 cases of the Zika virus reported in 2016.

West Nile Virus

According to the CDC, the West Nile Virus is the leading cause of mosquito-borne disease in the United States. During the summer and through the fall, this virus is transferred to mosquitoes feeding on infected birds, then the mosquitoes infect humans. Most people don’t experience any symptoms of West Nile, but those who do can suffer numbness, fever, headache, stiffness of the neck and vision loss. In extreme but rare cases, people can become disoriented, experience convulsions or enter into a coma. According to Vector Disease Control International, 49 out of 50 states reported cases of this virus in 2018, and 34 states reported cases of West Nile in 2019.

Eastern Equine Encephalitis

Eastern Equine Encephalitis is a rare but serious condition that causes brain inflammation. It can affect anyone but people older than 50 and younger than 15 are at the greatest risk. People who are infected with EEE often have no symptoms, but the disease can cause a sudden onset of a headache, chills, high fever and vomiting. Severe symptoms include seizures, brain inflammation, disorientation and coma. Cases of EEE are typically found in eastern parts of the U.S. and along the coast in the South.


Malaria is one of the most deadly diseases that can be passed on by female Anopheles mosquitoes.. In 2018, malaria was responsible for more than 400,000 deaths globally, per Statista. The industry resource also notes there were nearly 3,000 cases of malaria in the U.S. in 2016. Symptoms appear within eight to 25 days and can include fatigue, fever, headache, and vomiting. According to the CDC, malaria is likely to be found in tropical and subtropical areas where the Anopheles mosquito can live and breed. All the cases of malaria in the U.S. were brought into the country by international travelers.


Dengue can spread through the bites of the infected Aedes Albopictus and Aedes Aegypti mosquito. A mosquito carrying the virus typically lays its eggs near standing water in containers, including flower pots, pet food bowls and vases. These mosquitoes can bite during both day and night. According to the CDC, this virus is common in more than 100 countries globally, but not in the U.S. Americans who contract dengue bring it into the country after international travel.. Symptoms of dengue include joint, muscle, eye and bone pain, rash, headache, nausea and vomiting.

Chikungunya Virus

Mosquitoes can become infected with the Chikungunya virus after biting someone who already has it. The Aedes Aegypti and Aedes albopictus species spread the virus. These mosquitoes bite day and night and lay their eggs in water containers, such as flowerpots and tires. According to the Pan American Health Organization, the most common symptoms of the virus include joint pain and an abrupt fever. The Chikungunya virus can be contracted worldwide, and according to Statista, 171 cases were reported in the U.S. in 2019, but they were all travelers who had returned from infected areas.

Yellow Fever

While this disease is found in both tropical and subtropical areas in South America and Africa, yellow fever is rare in Americans , according to the CDC. Symptoms include aches and pain, fever, liver disease, yellowing skin (jaundice), and bleeding. The CDC says Americans who have become infected with yellow fever are typically living, visiting, or working in jungle border areas of South American or Africa .

Treating Mosquito Bites

Mosquito bites itch and it’s really difficult not to scratch them. Scratching is only momentary relief and can lead to infection or scarring of your skin if you aren’t careful. A bite has become infected if it feels warm, looks red or has a red streak spreading outward from the bite itself. If you are worried you have a potential infection, you should see a health care provider for treatment. Otherwise, a few home remedies may help to resolve the short-term effects of the bites:

  • Wash and clean the bitten area with soap and water
  • Use an antihistamine or anti-itch cream to help with the itching
  • Apply ice to help with inflammation
  • Use aloe vera to soothe the itching and redness from the bite
  • Use hydrocortisone cream to help the itching and inflammation

If none of these methods work, the bite isn’t going away or your symptoms worsen, it is best to see a doctor. Be aware of the chance of being infected with a mosquito-borne disease. If you’re experiencing joint and muscle pain, vomiting, rash, fever, or a headache, see a doctor immediately.


No matter where you live in the United States, mosquitoes are a threat. It’s best to take as many precautions as possible to keep the area around your home mosquito free so they do not have the opportunity to breed and multiply. Pay attention to the weather and the mosquito forecast for your part of the country to keep you and your family safe.

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