Mosquito season in Clay County, KY: when it starts and ends
Mosquito months in Clay County
In a normal year mosquito season in Clay County, KY starts around April 17 and ends around October 24, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Clay County, and when
- Start tipping out standing water weekly by April 3.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 24.
- No West Nile cases since 2016, so bites in Clay County are a nuisance; check window screens.
Clay County against the rest of KY
Clay County has the 119th longest season of 120 KY counties, at 190 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 55.4°F.
- Grayson County: April 14 to October 24 (193 days, 0 WNV)
- Morgan County: April 17 to October 26 (192 days, 0 WNV)
- Shelby County: April 24 to October 21 (180 days, 0 WNV)
West Nile in Clay County
CDC ArboNET lists no human West Nile cases for Clay County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
Background: when the season starts across the US; how the dates are worked out.