Mosquito season in Hardin County, KY: when it starts and ends
Mosquito months in Hardin County
In a normal year mosquito season in Hardin County, KY starts around April 1 and ends around November 2, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Hardin County, and when
- Start tipping out standing water weekly by March 18.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 2.
- No West Nile cases since 2016, so bites in Hardin County are a nuisance; check window screens.
Hardin County against the rest of KY
Hardin County has the 49th longest season of 120 KY counties, at 215 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 55.5°F.
- Ohio County: March 31 to November 1 (215 days, 0 WNV)
- Allen County: April 1 to November 2 (215 days, 1 WNV)
- Harlan County: April 1 to November 2 (215 days, 0 WNV)
- Rockcastle County: April 2 to November 3 (215 days, 0 WNV)
West Nile in Hardin County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Hardin County (1 neuroinvasive) across 1 year. The worst was 2009 with 1; the latest was 2009.
Background: when mosquitoes go away for the winter; how the dates are worked out.