Mosquito season in Marshall County, TN: when it starts and ends
Mosquito months in Marshall County
In a normal year mosquito season in Marshall County, TN starts around April 3 and ends around November 2, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Marshall County, and when
- Start tipping out standing water weekly by March 20.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 2.
- No West Nile cases since 2016, so bites in Marshall County are a nuisance; check window screens.
Marshall County against the rest of TN
Marshall County has the 77th longest season of 95 TN counties, at 213 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 59.1°F.
- Hancock County: April 2 to November 1 (213 days, 0 WNV)
- Hawkins County: April 2 to November 1 (213 days, 0 WNV)
- Campbell County: April 3 to November 1 (212 days, 0 WNV)
- White County: April 3 to November 1 (212 days, 0 WNV)
West Nile in Marshall County
CDC ArboNET lists no human West Nile cases for Marshall 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 mosquitoes go away for the winter.