Mosquito season in Henderson County, TN: when it starts and ends
Mosquito months in Henderson County
In a normal year mosquito season in Henderson County, TN starts around March 24 and ends around November 8, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Henderson 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 8.
- 1 West Nile case since 2016 (last 2016): you should use repellent at dusk June to September, more so if over 60.
Henderson County against the rest of TN
Henderson County has the 31st longest season of 95 TN counties, at 229 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 59.2°F.
- McNairy County: March 24 to November 9 (230 days, 0 WNV)
- Lewis County: March 25 to November 10 (230 days, 0 WNV)
- Sumner County: March 26 to November 9 (228 days, 5 WNV)
- McMinn County: March 27 to November 10 (228 days, 1 WNV)
West Nile in Henderson County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Henderson County (1 neuroinvasive) across 1 year. The worst was 2016 with 1; the latest was 2016.
See how the dates are worked out, and when mosquitoes go away for the winter.