Mosquito season in Sevier County, TN: when it starts and ends
Mosquito months in Sevier County
In a normal year mosquito season in Sevier County, TN starts around April 2 and ends around November 4, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Sevier County, and when
- Start tipping out standing water weekly by March 19.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 4.
- 2 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to August, more so if over 60.
Sevier County against the rest of TN
Sevier County has the 67th longest season of 95 TN counties, at 216 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 56.7°F.
- Perry County: April 1 to November 3 (216 days, 0 WNV)
- Putnam County: April 1 to November 3 (216 days, 0 WNV)
- Wayne County: April 2 to November 3 (215 days, 0 WNV)
- Coffee County: April 1 to November 1 (214 days, 0 WNV)
West Nile in Sevier County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Sevier County (3 neuroinvasive) across 3 years. The worst was 2025 with 1; the latest was 2025.
More: how the dates are worked out · when mosquitoes go away for the winter.