Mosquito season in Fairfax city, VA: when it starts and ends
Mosquito months in Fairfax city
In a normal year mosquito season in Fairfax city, VA starts around April 6 and ends around November 1, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Fairfax city, and when
- Start tipping out standing water weekly by March 23.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 1.
- No West Nile cases since 2016, so bites in Fairfax city are a nuisance; check window screens.
Fairfax city against the rest of VA
Fairfax city has the 87th 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.
- Rappahannock County: April 5 to November 1 (210 days, 1 WNV)
- Nelson County: April 5 to October 31 (209 days, 0 WNV)
- Waynesboro city: April 5 to October 30 (208 days, 1 WNV)
- Bristol city: April 7 to November 1 (208 days, 0 WNV)
West Nile in Fairfax city
CDC ArboNET lists no human West Nile cases for Fairfax city from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 8 of those years.
More: how the dates are worked out · when the season starts across the US.