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

Mosquito months in Gallatin County

In a normal year mosquito season in Gallatin County, KY starts around April 11 and ends around October 30, about 29 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 Gallatin County, and when

• Start tipping out standing water weekly by March 28.
• Book any yard treatment for mid April, ahead of the July peak.
• Repellent can go away after October 30.
• No West Nile cases since 2016, so bites in Gallatin County are a nuisance; check window screens.

Gallatin County against the rest of KY

Gallatin County has the 102nd longest season of 120 KY counties, at 202 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 54°F.

• McCreary County: April 10 to October 29 (202 days, 1 WNV)
• Casey County: April 11 to October 30 (202 days, 0 WNV)
• Marion County: April 11 to October 30 (202 days, 0 WNV)
• Taylor County: April 11 to October 30 (202 days, 0 WNV)

West Nile in Gallatin County

CDC ArboNET lists no human West Nile cases for Gallatin County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.

See how the dates are worked out, and when mosquitoes go away for the winter.