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

Mosquito months in King George County

In a normal year mosquito season in King George County, VA starts around March 31 and ends around November 6, 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 King George County, and when

• Start tipping out standing water weekly by March 17.
• Book any yard treatment for late March, ahead of the July peak.
• Repellent can go away after November 6.
• No West Nile cases since 2016, so bites in King George County are a nuisance; check window screens.

King George County against the rest of VA

King George County has the 63rd longest season of 133 VA counties, at 220 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 57°F.

• Orange County: March 30 to November 5 (220 days, 0 WNV)
• Caroline County: March 31 to November 6 (220 days, 0 WNV)
• Spotsylvania County: March 31 to November 6 (220 days, 0 WNV)
• Buckingham County: March 31 to November 5 (219 days, 0 WNV)

West Nile in King George County

CDC ArboNET lists no human West Nile cases for King George 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.