Mosquito season in Madison County, VA: when it starts and ends
Mosquito months in Madison County
In a normal year mosquito season in Madison County, VA starts around April 3 and ends around November 1, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Madison County, 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 1.
- No West Nile cases since 2016, so bites in Madison County are a nuisance; check window screens.
Madison County against the rest of VA
Madison County has the 79th longest season of 133 VA counties, at 212 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 55.3°F.
- Manassas Park city: April 3 to November 3 (214 days, 0 WNV)
- Patrick County: April 5 to November 4 (213 days, 0 WNV)
- Scott County: April 4 to November 1 (211 days, 0 WNV)
- Warren County: April 4 to November 1 (211 days, 3 WNV)
West Nile in Madison County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Madison County (1 neuroinvasive) across 1 year. The worst was 2009 with 1; the latest was 2009.
More: how the dates are worked out · when mosquitoes go away for the winter.