Mosquito season in Upshur County, WV: when it starts and ends
Mosquito months in Upshur County
In a normal year mosquito season in Upshur County, WV starts around April 14 and ends around October 25, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Upshur County, and when
- Start tipping out standing water weekly by March 31.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 25.
- No West Nile cases since 2016, so bites in Upshur County are a nuisance; check window screens.
Upshur County against the rest of WV
Upshur County has the 32nd longest season of 55 WV counties, at 194 days against 224 in Cabell County and 162 in Randolph County. Its mean temperature is 52°F.
- Doddridge County: April 15 to October 27 (195 days, 0 WNV)
- Grant County: April 13 to October 23 (194 days, 0 WNV)
- Calhoun County: April 15 to October 26 (194 days, 0 WNV)
- Marshall County: April 15 to October 26 (194 days, 0 WNV)
West Nile in Upshur County
CDC ArboNET lists no human West Nile cases for Upshur County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
Background: when mosquitoes go away for the winter; how the dates are worked out.