Mosquito season in Harlan County, KY: when it starts and ends
Mosquito months in Harlan County
In a normal year mosquito season in Harlan 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 Harlan 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 Harlan County are a nuisance; check window screens.
Harlan County against the rest of KY
Harlan County has the 50th longest season of 120 KY counties, at 215 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 55.3°F.
- Allen County: April 1 to November 2 (215 days, 1 WNV)
- Hardin County: April 1 to November 2 (215 days, 0 WNV)
- Rockcastle County: April 2 to November 3 (215 days, 0 WNV)
- Franklin County: April 3 to November 4 (215 days, 1 WNV)
West Nile in Harlan County
CDC ArboNET lists no human West Nile cases for Harlan County from 1999 to 2025.
Background: when mosquitoes go away for the winter; how the dates are worked out.