Mosquito season in Blount County, TN: when it starts and ends
Mosquito months in Blount County
In a normal year mosquito season in Blount County, TN starts around March 19 and ends around November 10, about 34 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Blount County, and when
- Start tipping out standing water weekly by March 5.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 10.
- No West Nile cases since 2016, so bites in Blount County are a nuisance; check window screens.
Blount County against the rest of TN
Blount County has the 14th longest season of 95 TN counties, at 236 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 58.5°F.
- Hardin County: March 18 to November 11 (238 days, 0 WNV)
- Lake County: March 18 to November 12 (238 days, 0 WNV)
- Roane County: March 20 to November 10 (235 days, 0 WNV)
- Davidson County: March 20 to November 9 (234 days, 11 WNV)
West Nile in Blount County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Blount County (2 neuroinvasive) across 2 years. The worst was 2015 with 1; the latest was 2015.
Background: when mosquitoes go away for the winter; how the dates are worked out.