Mosquito Season in North Carolina Ends After First Frost
Mosquito Season in North Carolina Ends After First Frost
US · Published Sep 30, 2026
• Mosquito activity in North Carolina is currently moderate to high, with the biting season typically running from May through October.
• The state experiences approximately 50 to 100 confirmed cases of West Nile Virus (WNV) annually, with risk areas including coastal swamps, Piedmont metros, and the Smoky Mountain foothills.

Impact & Risks

Residents across North Carolina, particularly in areas like Charlotte, Raleigh, Greensboro, and Durham, face a moderate to high risk of mosquito-borne illnesses such as West Nile Virus (WNV) and Eastern Equine Encephalitis (EEE). The Coastal Plain, including Bertie, Hertford, and Tyrrell counties, is particularly vulnerable to EEE due to the presence of freshwater swamps. The peak risk for mosquito bites occurs in August, with activity expected to decline after the first hard freeze, typically around late October. Residents should remain vigilant, especially in areas with high mosquito populations.

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