Mosquito season in Franklin County, TN: when it starts and ends
Mosquito months in Franklin County
In a normal year mosquito season in Franklin County, TN starts around March 26 and ends around November 6, about 32 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Franklin County, and when
- Start tipping out standing water weekly by March 12.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 6.
- No West Nile cases since 2016, so bites in Franklin County are a nuisance; check window screens.
Franklin County against the rest of TN
Franklin County has the 41st longest season of 95 TN counties, at 225 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 59.1°F.
- Gibson County: March 25 to November 6 (226 days, 1 WNV)
- Lawrence County: March 26 to November 7 (226 days, 1 WNV)
- Warren County: March 27 to November 7 (225 days, 0 WNV)
- Henry County: March 28 to November 8 (225 days, 0 WNV)
West Nile in Franklin County
CDC ArboNET lists no human West Nile cases for Franklin County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.
See how the dates are worked out, and when the season starts across the US.