Mosquito season in Knox County, KY: when it starts and ends
Mosquito months in Knox County
In a normal year mosquito season in Knox County, KY starts around April 6 and ends around November 1, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Knox County, and when
- Start tipping out standing water weekly by March 23.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 1.
- No West Nile cases since 2016, so bites in Knox County are a nuisance; check window screens.
Knox County against the rest of KY
Knox County has the 84th longest season of 120 KY counties, at 209 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 56°F.
- Johnson County: April 5 to October 31 (209 days, 0 WNV)
- Kenton County: April 5 to October 31 (209 days, 8 WNV)
- Meade County: April 6 to November 1 (209 days, 0 WNV)
- Leslie County: April 9 to November 3 (208 days, 0 WNV)
West Nile in Knox County
CDC ArboNET lists no human West Nile cases for Knox County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
More: how the dates are worked out · when mosquitoes go away for the winter.