Mosquito season in James City County, VA: when it starts and ends
Mosquito months in James City County
In a normal year mosquito season in James City County, VA starts around March 20 and ends around November 19, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in James City County, and when
- Start tipping out standing water weekly by March 6.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 19.
- No West Nile cases since 2016, so bites in James City County are a nuisance; check window screens.
James City County against the rest of VA
James City County has the 10th longest season of 133 VA counties, at 244 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 59.7°F.
- Isle of Wight County: March 18 to November 18 (245 days, 1 WNV)
- Suffolk city: March 18 to November 17 (244 days, 0 WNV)
- Newport News city: March 20 to November 19 (244 days, 3 WNV)
- Williamsburg city: March 20 to November 19 (244 days, 0 WNV)
West Nile in James City County
CDC ArboNET lists no human West Nile cases for James City 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 the season starts across the US.