Mosquito season in Boyd County, KY: when it starts and ends
Mosquito months in Boyd County
In a normal year mosquito season in Boyd County, KY starts around March 31 and ends around November 3, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Boyd County, and when
- Start tipping out standing water weekly by March 17.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 3.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk June to August, more so if over 60.
Boyd County against the rest of KY
Boyd County has the 37th longest season of 120 KY counties, at 217 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 55.7°F.
- Wolfe County: March 31 to November 4 (218 days, 0 WNV)
- Caldwell County: March 30 to November 2 (217 days, 0 WNV)
- Clinton County: March 31 to November 3 (217 days, 0 WNV)
- Lee County: March 31 to November 3 (217 days, 0 WNV)
West Nile in Boyd County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Boyd County (0 neuroinvasive) across 1 year. The worst was 2018 with 1; the latest was 2018.
Background: when mosquitoes go away for the winter; how the dates are worked out.