Mosquito season in Henry County, TN: when it starts and ends
Mosquito months in Henry County
In a normal year mosquito season in Henry County, TN starts around March 28 and ends around November 8, about 32 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Henry County, and when
- Start tipping out standing water weekly by March 14.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 8.
- No West Nile cases since 2016, so bites in Henry County are a nuisance; check window screens.
Henry County against the rest of TN
Henry County has the 43rd longest season of 95 TN counties, at 225 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 58.1°F.
- Franklin County: March 26 to November 6 (225 days, 0 WNV)
- Warren County: March 27 to November 7 (225 days, 0 WNV)
- Montgomery County: March 29 to November 9 (225 days, 0 WNV)
- Bedford County: March 27 to November 6 (224 days, 1 WNV)
West Nile in Henry County
CDC ArboNET lists no human West Nile cases for Henry County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 5 of those years.
More: how the dates are worked out · when mosquitoes go away for the winter.