Mosquito season in Preston County, WV: when it starts and ends
Mosquito months in Preston County
In a normal year mosquito season in Preston County, WV starts around April 18 and ends around October 20, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Preston County, and when
- Start tipping out standing water weekly by April 4.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 20.
- No West Nile cases since 2016, so bites in Preston County are a nuisance; check window screens.
Preston County against the rest of WV
Preston County has the 45th longest season of 55 WV counties, at 184 days against 224 in Cabell County and 162 in Randolph County. Its mean temperature is 49.5°F.
- Mercer County: April 16 to October 19 (186 days, 0 WNV)
- Tyler County: April 20 to October 23 (186 days, 0 WNV)
- Greenbrier County: April 19 to October 20 (184 days, 0 WNV)
- Webster County: April 21 to October 22 (184 days, 0 WNV)
West Nile in Preston County
CDC ArboNET lists no human West Nile cases for Preston County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.
Background: when mosquitoes go away for the winter; how the dates are worked out.