Mosquito season in Roane County, TN: when it starts and ends
Mosquito months in Roane County
In a normal year mosquito season in Roane County, TN starts around March 20 and ends around November 10, about 34 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Roane County, and when
- Start tipping out standing water weekly by March 6.
- 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 Roane County are a nuisance; check window screens.
Roane County against the rest of TN
Roane County has the 15th longest season of 95 TN counties, at 235 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 58.4°F.
- Lake County: March 18 to November 12 (238 days, 0 WNV)
- Blount County: March 19 to November 10 (236 days, 0 WNV)
- Davidson County: March 20 to November 9 (234 days, 11 WNV)
- Decatur County: March 20 to November 8 (233 days, 0 WNV)
West Nile in Roane County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Roane County (1 neuroinvasive) across 1 year. The worst was 2014 with 1; the latest was 2014.
See how the dates are worked out, and when the season starts across the US.