Mosquito season in Oldham County, KY: when it starts and ends
Mosquito months in Oldham County
In a normal year mosquito season in Oldham County, KY starts around March 31 and ends around October 31, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Oldham County, and when
- Start tipping out standing water weekly by March 17.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after October 31.
- No West Nile cases since 2016, so bites in Oldham County are a nuisance; check window screens.
Oldham County against the rest of KY
Oldham County has the 54th longest season of 120 KY counties, at 214 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 55.2°F.
- Franklin County: April 3 to November 4 (215 days, 1 WNV)
- Pendleton County: April 3 to November 4 (215 days, 0 WNV)
- Henry County: April 1 to October 31 (214 days, 1 WNV)
- Anderson County: April 3 to November 3 (214 days, 1 WNV)
West Nile in Oldham County
CDC ArboNET lists no human West Nile cases for Oldham County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 6 of those years.
See how the dates are worked out, and when the season starts across the US.