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

Mosquito months in Haywood County

In a normal year mosquito season in Haywood County, TN starts around March 16 and ends around November 17, about 35 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 Haywood County, and when

• Start tipping out standing water weekly by March 2.
• Book any yard treatment for mid March, ahead of the July peak.
• Repellent can go away after November 17.
• No West Nile cases since 2016, so bites in Haywood County are a nuisance; check window screens.

Haywood County against the rest of TN

Haywood County has the 4th longest season of 95 TN counties, at 246 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 60.9°F.

• Sequatchie County: March 12 to November 15 (248 days, 0 WNV)
• Shelby County: March 15 to November 17 (247 days, 47 WNV)
• Lauderdale County: March 14 to November 14 (245 days, 0 WNV)
• Crockett County: March 16 to November 14 (243 days, 3 WNV)

West Nile in Haywood County

From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Haywood County (2 neuroinvasive) across 3 years. The worst was 2012 with 1; the latest was 2012.

More: how the dates are worked out · when the season starts across the US.