Mosquito season in Lewis County, TN: when it starts and ends
Mosquito months in Lewis County
In a normal year mosquito season in Lewis County, TN starts around March 25 and ends around November 10, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lewis County, and when
- Start tipping out standing water weekly by March 11.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 10.
- No West Nile cases since 2016, so bites in Lewis County are a nuisance; check window screens.
Lewis County against the rest of TN
Lewis County has the 30th longest season of 95 TN counties, at 230 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 58.5°F.
- Obion County: March 22 to November 7 (230 days, 1 WNV)
- McNairy County: March 24 to November 9 (230 days, 0 WNV)
- Henderson County: March 24 to November 8 (229 days, 1 WNV)
- Sumner County: March 26 to November 9 (228 days, 5 WNV)
West Nile in Lewis County
CDC ArboNET lists no human West Nile cases for Lewis County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
More: how the dates are worked out · when mosquitoes go away for the winter.