Mosquito season in Oklahoma County, OK: when it starts and ends
Mosquito months in Oklahoma County
In a normal year mosquito season in Oklahoma County, OK starts around March 17 and ends around November 13, about 34 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Oklahoma County, and when
- Start tipping out standing water weekly by March 3.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 13.
- 64 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to September, and check OK spray notices.
Oklahoma County against the rest of OK
Oklahoma County has the 23rd longest season of 77 OK counties, at 241 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 60.9°F.
- Adair County: March 17 to November 14 (242 days, 0 WNV)
- Latimer County: March 18 to November 15 (242 days, 0 WNV)
- Tulsa County: March 17 to November 13 (241 days, 47 WNV)
- Cotton County: March 19 to November 14 (240 days, 0 WNV)
West Nile in Oklahoma County
From 1999 to 2025, CDC ArboNET counted 199 human West Nile cases in Oklahoma County (146 neuroinvasive) across 20 years. The worst was 2012 with 60; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.