Mosquito season in Mason County, KY: when it starts and ends
Mosquito months in Mason County
In a normal year mosquito season in Mason County, KY starts around April 6 and ends around October 30, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Mason 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 October 30.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk June to August, more so if over 60.
Mason County against the rest of KY
Mason County has the 89th longest season of 120 KY counties, at 207 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 53.7°F.
- Elliott County: April 4 to October 28 (207 days, 0 WNV)
- Robertson County: April 5 to October 30 (207 days, 0 WNV)
- Powell County: April 6 to October 30 (207 days, 1 WNV)
- Edmonson County: April 8 to November 1 (207 days, 0 WNV)
West Nile in Mason County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Mason County (1 neuroinvasive) across 1 year. The worst was 2018 with 1; the latest was 2018.
More: how the dates are worked out · when mosquitoes go away for the winter.