Mosquito season in Colonial Heights city, VA: when it starts and ends
Mosquito months in Colonial Heights city
In a normal year mosquito season in Colonial Heights city, VA starts around March 20 and ends around November 14, about 34 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Colonial Heights city, 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 14.
- No West Nile cases since 2016, so bites in Colonial Heights city are a nuisance; check window screens.
Colonial Heights city against the rest of VA
Colonial Heights city has the 18th longest season of 133 VA counties, at 238 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 59°F.
- York County: March 21 to November 17 (242 days, 0 WNV)
- Petersburg city: March 20 to November 14 (239 days, 1 WNV)
- Chesterfield County: March 22 to November 15 (238 days, 1 WNV)
- Northampton County: March 26 to November 19 (238 days, 0 WNV)
West Nile in Colonial Heights city
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Colonial Heights city (1 neuroinvasive) across 1 year. The worst was 2002 with 1; the latest was 2002.
Background: when mosquitoes go away for the winter; how the dates are worked out.