Mosquito season in Nelson County, VA: when it starts and ends
Mosquito months in Nelson County
In a normal year mosquito season in Nelson County, VA starts around April 5 and ends around October 31, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Nelson County, and when
- Start tipping out standing water weekly by March 22.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 31.
- No West Nile cases since 2016, so bites in Nelson County are a nuisance; check window screens.
Nelson County against the rest of VA
Nelson County has the 86th longest season of 133 VA counties, at 209 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 54.2°F.
- Fairfax County: April 5 to November 1 (210 days, 31 WNV)
- Rappahannock County: April 5 to November 1 (210 days, 1 WNV)
- Fairfax city: April 6 to November 1 (209 days, 0 WNV)
- Waynesboro city: April 5 to October 30 (208 days, 1 WNV)
West Nile in Nelson County
CDC ArboNET lists no human West Nile cases for Nelson County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.
See how the dates are worked out, and when mosquitoes go away for the winter.