Mosquito season in Franklin County, VA: when it starts and ends

Mosquito months in Franklin County

In a normal year mosquito season in Franklin County, VA starts around April 3 and ends around November 3, about 31 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Franklin County, and when

• Start tipping out standing water weekly by March 20.
• Book any yard treatment for early April, ahead of the July peak.
• Repellent can go away after November 3.
• No West Nile cases since 2016, so bites in Franklin County are a nuisance; check window screens.

Franklin County against the rest of VA

Franklin County has the 74th longest season of 133 VA counties, at 214 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 56.3°F.

• Lynchburg city: April 2 to November 3 (215 days, 1 WNV)
• Fauquier County: April 3 to November 3 (214 days, 1 WNV)
• Prince William County: April 3 to November 3 (214 days, 7 WNV)
• Manassas city: April 3 to November 3 (214 days, 0 WNV)

West Nile in Franklin County

CDC ArboNET lists no human West Nile cases for Franklin County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.

More: how the dates are worked out · when mosquitoes go away for the winter.