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

Mosquito months in Carroll County

In a normal year mosquito season in Carroll County, VA starts around April 13 and ends around October 25, about 28 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 Carroll County, and when

• Start tipping out standing water weekly by March 30.
• 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 Carroll County are a nuisance; check window screens.

Carroll County against the rest of VA

Carroll County has the 123rd longest season of 133 VA counties, at 195 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 52.9°F.

• Alleghany County: April 14 to October 27 (196 days, 0 WNV)
• Covington city: April 14 to October 27 (196 days, 0 WNV)
• Russell County: April 13 to October 25 (195 days, 0 WNV)
• Galax city: April 13 to October 25 (195 days, 0 WNV)

West Nile in Carroll County

CDC ArboNET lists no human West Nile cases for Carroll 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.