Mosquito season in Washita County, OK: when it starts and ends
Mosquito months in Washita County
In a normal year mosquito season in Washita County, OK starts around March 23 and ends around November 9, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Washita County, and when
- Start tipping out standing water weekly by March 9.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 9.
- No West Nile cases since 2016, so bites in Washita County are a nuisance; check window screens.
Washita County against the rest of OK
Washita County has the 38th longest season of 77 OK counties, at 231 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 60.4°F.
- Le Flore County: March 25 to November 12 (232 days, 1 WNV)
- Murray County: March 23 to November 9 (231 days, 1 WNV)
- Mayes County: March 23 to November 8 (230 days, 1 WNV)
- Garvin County: March 24 to November 9 (230 days, 3 WNV)
West Nile in Washita County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Washita County (1 neuroinvasive) across 3 years. The worst was 2014 with 1; the latest was 2014.
More: how the dates are worked out · when the season starts across the US.