Mosquito season in Grundy County, TN: when it starts and ends
Mosquito months in Grundy County
In a normal year mosquito season in Grundy County, TN starts around April 7 and ends around October 30, about 29 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Grundy County, and when
- Start tipping out standing water weekly by March 24.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 30.
- No West Nile cases since 2016, so bites in Grundy County are a nuisance; check window screens.
Grundy County against the rest of TN
Grundy County has the 87th longest season of 95 TN counties, at 206 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 54.9°F.
- Cannon County: April 5 to October 29 (207 days, 0 WNV)
- Unicoi County: April 7 to October 31 (207 days, 0 WNV)
- Morgan County: April 5 to October 27 (205 days, 0 WNV)
- Jackson County: April 8 to October 30 (205 days, 0 WNV)
West Nile in Grundy County
CDC ArboNET lists no human West Nile cases for Grundy County from 1999 to 2025.
See how the dates are worked out, and when the season starts across the US.