Mosquito season in McLean County, KY: when it starts and ends
Mosquito months in McLean County
In a normal year mosquito season in McLean County, KY starts around March 23 and ends around November 6, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in McLean County, and when
- Start tipping out standing water weekly by March 9.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 6.
- No West Nile cases since 2016, so bites in McLean County are a nuisance; check window screens.
McLean County against the rest of KY
McLean County has the 15th longest season of 120 KY counties, at 228 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 57.2°F.
- Graves County: March 24 to November 8 (229 days, 0 WNV)
- Pulaski County: March 25 to November 9 (229 days, 0 WNV)
- McCracken County: March 24 to November 7 (228 days, 9 WNV)
- Metcalfe County: March 25 to November 8 (228 days, 1 WNV)
West Nile in McLean County
CDC ArboNET lists no human West Nile cases for McLean County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.
See how the dates are worked out, and when mosquitoes go away for the winter.