Mosquito season in Trigg County, KY: when it starts and ends

Mosquito months in Trigg County

In a normal year mosquito season in Trigg County, KY starts around March 16 and ends around November 13, 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 Trigg 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 13.
• No West Nile cases since 2016, so bites in Trigg County are a nuisance; check window screens.

Trigg County against the rest of KY

Trigg County has the 2nd longest season of 120 KY counties, at 242 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 59.3°F.

• Lyon County: March 15 to November 19 (249 days, 0 WNV)
• Hopkins County: March 22 to November 12 (235 days, 4 WNV)
• Christian County: March 22 to November 10 (233 days, 0 WNV)

West Nile in Trigg County

CDC ArboNET lists no human West Nile cases for Trigg County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.

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