Mosquito season in Stewart County, TN: when it starts and ends
Mosquito months in Stewart County
In a normal year mosquito season in Stewart County, TN starts around March 23 and ends around November 11, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Stewart County, and when
- Start tipping out standing water weekly by March 9.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 11.
- No West Nile cases since 2016, so bites in Stewart County are a nuisance; check window screens.
Stewart County against the rest of TN
Stewart County has the 22nd longest season of 95 TN counties, at 233 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 58.6°F.
- Williamson County: March 22 to November 10 (233 days, 1 WNV)
- Macon County: March 23 to November 11 (233 days, 0 WNV)
- Weakley County: March 23 to November 11 (233 days, 0 WNV)
- Loudon County: March 25 to November 12 (232 days, 0 WNV)
West Nile in Stewart County
CDC ArboNET lists no human West Nile cases for Stewart County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.
More: how the dates are worked out · when mosquitoes go away for the winter.