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

Mosquito months in Essex County

In a normal year mosquito season in Essex County, VA starts around March 29 and ends around November 10, about 32 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 Essex County, and when

• Start tipping out standing water weekly by March 15.
• Book any yard treatment for late March, ahead of the July peak.
• Repellent can go away after November 10.
• No West Nile cases since 2016, so bites in Essex County are a nuisance; check window screens.

Essex County against the rest of VA

Essex County has the 45th longest season of 133 VA counties, at 226 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 58.5°F.

• Greene County: March 26 to November 7 (226 days, 2 WNV)
• Stafford County: March 27 to November 8 (226 days, 0 WNV)
• Richmond County: March 29 to November 10 (226 days, 0 WNV)
• Westmoreland County: March 29 to November 10 (226 days, 1 WNV)

West Nile in Essex County

CDC ArboNET lists no human West Nile cases for Essex County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.

Background: when the season starts across the US; how the dates are worked out.