Mosquito season in Hanover County, VA: when it starts and ends
Mosquito months in Hanover County
In a normal year mosquito season in Hanover County, VA starts around March 30 and ends around November 8, about 32 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Hanover County, and when
- Start tipping out standing water weekly by March 16.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 8.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk June to August, more so if over 60.
Hanover County against the rest of VA
Hanover County has the 57th longest season of 133 VA counties, at 223 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 57.5°F.
- Halifax County: March 29 to November 7 (223 days, 0 WNV)
- Arlington County: March 30 to November 8 (223 days, 5 WNV)
- Nottoway County: March 30 to November 7 (222 days, 0 WNV)
- Charlottesville city: March 29 to November 6 (221 days, 0 WNV)
West Nile in Hanover County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Hanover County (2 neuroinvasive) across 2 years. The worst was 2018 with 1; the latest was 2018.
See how the dates are worked out, and when mosquitoes go away for the winter.