When temperatures are consistently at or above 50 degrees Fahrenheit, mosquito eggs begin to hatch and mosquito season begins. When exactly this will happen depends largely on where you live and the weather you're experience that year.
Most years, most states will experience some mosquitoes by Early May.
Here are some approximately when mosquito season starts for different states:
Early February
- Florida (Southern)
- Louisiana (Southern)
- Texas (West, Central, & Southern)
Early March
- Alabama
- Arizona
- Arkansas (Southern)
- California (Southern)
- Florida (All)
- Georgia
- Louisiana (All)
- Mississippi
- Nevada (Southern)
- New Mexico
- Oklahoma (Southern)
- South Carolina
- Texas (All)
Early April
- Arkansas (All)
- California (All)
- Colorado
- Kansas
- Kentucky
- Missouri
- Nevada (All)
- North Carolina
- Oklahoma (All)
- Tennessee
- Virginia
- Utah
- West Virginia
Late April
- Delaware
- Idaho (Southern)
- Illinois
- Indiana
- Iowa (Southern & Central)
- Maryland
- Massachusetts (Southern)
- Nebraska
- New Jersey
- New York (Southern)
- Ohio
- Oregon (Southern & Central)
- Pennsylvania
- Rhode Island
- Wyoming (Southern & Central)
Early May
- Alaska (Southern & Central)
- Hawaii
- Idaho (All)
- Iowa (All)
- Maine
- Massachusetts (All)
- MichiganMinnesota
- New Hampshire
- New York (All)
- North Dakota
- Oregon (All)
- Vermont
- Washington
- Wyoming (All)
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