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

Mosquito months in Nowata County

In a normal year mosquito season in Nowata County, OK starts around March 26 and ends around November 10, about 33 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 Nowata County, and when

• Start tipping out standing water weekly by March 12.
• Book any yard treatment for late March, ahead of the July peak.
• Repellent can go away after November 10.
• No West Nile cases since 2016, so bites in Nowata County are a nuisance; check window screens.

Nowata County against the rest of OK

Nowata County has the 44th longest season of 77 OK counties, at 229 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 59.7°F.

• Caddo County: March 25 to November 10 (230 days, 2 WNV)
• Major County: March 26 to November 10 (229 days, 3 WNV)
• Grady County: March 25 to November 8 (228 days, 1 WNV)
• Rogers County: March 25 to November 8 (228 days, 2 WNV)

West Nile in Nowata County

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

See how the dates are worked out, and when mosquitoes go away for the winter.