Mosquito season in Wilson County, TN: when it starts and ends

Mosquito months in Wilson County

In a normal year mosquito season in Wilson County, TN starts around March 26 and ends around November 8, about 32 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Wilson County, and when

• Start tipping out standing water weekly by March 12.
• 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 2017): you should use repellent at dusk June to September, more so if over 60.

Wilson County against the rest of TN

Wilson County has the 38th longest season of 95 TN counties, at 227 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 58.5°F.

• Meigs County: March 26 to November 8 (227 days, 1 WNV)
• Polk County: March 26 to November 8 (227 days, 0 WNV)
• Gibson County: March 25 to November 6 (226 days, 1 WNV)
• Lawrence County: March 26 to November 7 (226 days, 1 WNV)

West Nile in Wilson County

From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Wilson County (2 neuroinvasive) across 2 years. The worst was 2017 with 1; the latest was 2017.

More: how the dates are worked out · when mosquitoes go away for the winter.