Mosquito season in Haskell County, OK: when it starts and ends

Mosquito months in Haskell County

In a normal year mosquito season in Haskell County, OK starts around March 9 and ends around November 16, about 36 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Haskell County, and when

• Start tipping out standing water weekly by February 23.
• Book any yard treatment for early March, ahead of the July peak.
• Repellent can go away after November 16.
• No West Nile cases since 2016, so bites in Haskell County are a nuisance; check window screens.

Haskell County against the rest of OK

Haskell County has the 7th longest season of 77 OK counties, at 252 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 62.3°F.

• Okfuskee County: March 11 to November 20 (254 days, 1 WNV)
• Marshall County: March 11 to November 19 (253 days, 2 WNV)
• Comanche County: March 11 to November 16 (250 days, 8 WNV)
• Stephens County: March 12 to November 16 (249 days, 8 WNV)

West Nile in Haskell County

From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Haskell County (2 neuroinvasive) across 3 years. The worst was 2007 with 1; the latest was 2007.

More: how the dates are worked out · when mosquitoes go away for the winter.