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

Mosquito months in Beckham County

In a normal year mosquito season in Beckham County, OK starts around April 1 and ends around November 4, about 31 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 Beckham County, and when

• Start tipping out standing water weekly by March 18.
• Book any yard treatment for early April, ahead of the July peak.
• Repellent can go away after November 4.
• 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to September, more so if over 60.

Beckham County against the rest of OK

Beckham County has the 65th longest season of 77 OK counties, at 217 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 59.6°F.

• Alfalfa County: April 1 to November 5 (218 days, 1 WNV)
• Custer County: April 1 to November 5 (218 days, 1 WNV)
• Grant County: April 1 to November 4 (217 days, 2 WNV)
• Woods County: April 1 to November 3 (216 days, 1 WNV)

West Nile in Beckham County

From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Beckham County (2 neuroinvasive) across 3 years. The worst was 2023 with 2; the latest was 2023.

See how the dates are worked out, and when the season starts across the US.