Mosquito season in Manassas city, VA: when it starts and ends
Mosquito months in Manassas city
In a normal year mosquito season in Manassas city, VA starts around April 3 and ends around November 3, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Manassas city, and when
- Start tipping out standing water weekly by March 20.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 3.
- No West Nile cases since 2016, so bites in Manassas city are a nuisance; check window screens.
Manassas city against the rest of VA
Manassas city has the 76th longest season of 133 VA counties, at 214 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 55.5°F.
- Franklin County: April 3 to November 3 (214 days, 0 WNV)
- Prince William County: April 3 to November 3 (214 days, 7 WNV)
- Manassas Park city: April 3 to November 3 (214 days, 0 WNV)
- Patrick County: April 5 to November 4 (213 days, 0 WNV)
West Nile in Manassas city
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Manassas city (0 neuroinvasive) across 1 year. The worst was 2015 with 1; the latest was 2015.
See how the dates are worked out, and when the season starts across the US.