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

Mosquito months in Beaver County

In a normal year mosquito season in Beaver County, OK starts around April 10 and ends around October 29, about 29 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 Beaver County, and when

• Start tipping out standing water weekly by March 27.
• Book any yard treatment for early April, ahead of the July peak.
• Repellent can go away after October 29.
• 5 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to September, more so if over 60.

Beaver County against the rest of OK

Beaver County has the 76th longest season of 77 OK counties, at 202 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 56.6°F.

• Texas County: April 8 to November 1 (207 days, 4 WNV)
• Dewey County: April 8 to October 29 (204 days, 1 WNV)
• Cimarron County: April 15 to October 25 (193 days, 0 WNV)

West Nile in Beaver County

From 1999 to 2025, CDC ArboNET counted 11 human West Nile cases in Beaver County (9 neuroinvasive) across 5 years. The worst was 2023 with 5; the latest was 2023.

See how the dates are worked out, and reading the West Nile counts.