Mosquito season in Kay County, OK: when it starts and ends
Mosquito months in Kay County
In a normal year mosquito season in Kay County, OK starts around March 29 and ends around November 5, about 32 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Kay County, and when
- Start tipping out standing water weekly by March 15.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 5.
- 6 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to September, more so if over 60.
Kay County against the rest of OK
Kay County has the 59th longest season of 77 OK counties, at 221 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 58.8°F.
- Noble County: March 28 to November 5 (222 days, 0 WNV)
- Okmulgee County: March 29 to November 6 (222 days, 3 WNV)
- Garfield County: March 31 to November 7 (221 days, 6 WNV)
- Creek County: March 28 to November 2 (219 days, 1 WNV)
West Nile in Kay County
From 1999 to 2025, CDC ArboNET counted 9 human West Nile cases in Kay County (5 neuroinvasive) across 7 years. The worst was 2018 with 2; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.