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

Mosquito months in Ballard County

In a normal year mosquito season in Ballard County, KY starts around March 22 and ends around November 9, 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 Ballard County, and when

• Start tipping out standing water weekly by March 8.
• Book any yard treatment for late March, ahead of the July peak.
• Repellent can go away after November 9.
• No West Nile cases since 2016, so bites in Ballard County are a nuisance; check window screens.

Ballard County against the rest of KY

Ballard County has the 5th longest season of 120 KY counties, at 232 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 58.1°F.

• Hopkins County: March 22 to November 12 (235 days, 4 WNV)
• Christian County: March 22 to November 10 (233 days, 0 WNV)
• Jefferson County: March 22 to November 9 (232 days, 35 WNV)
• Fulton County: March 23 to November 9 (231 days, 0 WNV)

West Nile in Ballard County

CDC ArboNET lists no human West Nile cases for Ballard County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 5 of those years.

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