Mosquito season in McNairy County, TN: when it starts and ends
Mosquito months in McNairy County
In a normal year mosquito season in McNairy County, TN starts around March 24 and ends around November 9, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in McNairy County, and when
- Start tipping out standing water weekly by March 10.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 9.
- No West Nile cases since 2016, so bites in McNairy County are a nuisance; check window screens.
McNairy County against the rest of TN
McNairy County has the 29th longest season of 95 TN counties, at 230 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 60.4°F.
- Madison County: March 22 to November 7 (230 days, 1 WNV)
- Obion County: March 22 to November 7 (230 days, 1 WNV)
- Lewis County: March 25 to November 10 (230 days, 0 WNV)
- Henderson County: March 24 to November 8 (229 days, 1 WNV)
West Nile in McNairy County
CDC ArboNET lists no human West Nile cases for McNairy County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.
See how the dates are worked out, and when the season starts across the US.