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

Mosquito months in Loudon County

In a normal year mosquito season in Loudon County, TN starts around March 25 and ends around November 12, about 33 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 Loudon 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 12.
• No West Nile cases since 2016, so bites in Loudon County are a nuisance; check window screens.

Loudon County against the rest of TN

Loudon County has the 24th longest season of 95 TN counties, at 232 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 59°F.

• Stewart County: March 23 to November 11 (233 days, 0 WNV)
• Weakley County: March 23 to November 11 (233 days, 0 WNV)
• Cocke County: March 24 to November 10 (231 days, 0 WNV)
• Jefferson County: March 22 to November 7 (230 days, 2 WNV)

West Nile in Loudon County

CDC ArboNET lists no human West Nile cases for Loudon County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 6 of those years.

See how the dates are worked out, and when the season starts across the US.