Mosquito season in Cotton County, OK: when it starts and ends
Mosquito months in Cotton County
In a normal year mosquito season in Cotton County, OK starts around March 19 and ends around November 14, about 34 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Cotton County, and when
- Start tipping out standing water weekly by March 5.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 14.
- No West Nile cases since 2016, so bites in Cotton County are a nuisance; check window screens.
Cotton County against the rest of OK
Cotton County has the 25th longest season of 77 OK counties, at 240 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 62.4°F.
- Oklahoma County: March 17 to November 13 (241 days, 64 WNV)
- Tulsa County: March 17 to November 13 (241 days, 47 WNV)
- McIntosh County: March 18 to November 12 (239 days, 1 WNV)
- Muskogee County: March 18 to November 12 (239 days, 6 WNV)
West Nile in Cotton County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Cotton County (2 neuroinvasive) across 2 years. The worst was 2015 with 1; the latest was 2015.
Background: when the season starts across the US; how the dates are worked out.