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

Mosquito months in Alleghany County

In a normal year mosquito season in Alleghany County, VA starts around April 14 and ends around October 27, 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 Alleghany 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 27.
• No West Nile cases since 2016, so bites in Alleghany County are a nuisance; check window screens.

Alleghany County against the rest of VA

Alleghany County has the 121st longest season of 133 VA counties, at 196 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 52.6°F.

• Page County: April 13 to October 28 (198 days, 0 WNV)
• Shenandoah County: April 13 to October 27 (197 days, 4 WNV)
• Covington city: April 14 to October 27 (196 days, 0 WNV)
• Carroll County: April 13 to October 25 (195 days, 0 WNV)

West Nile in Alleghany County

CDC ArboNET lists no human West Nile cases for Alleghany 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.