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

Mosquito months in Logan County

In a normal year mosquito season in Logan County, OK starts around March 23 and ends around November 11, 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 Logan 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 11.
• 1 West Nile case since 2016 (last 2025): you should use repellent at dusk June to September, more so if over 60.

Logan County against the rest of OK

Logan County has the 33rd longest season of 77 OK counties, at 233 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 60.6°F.

• Roger Mills County: March 22 to November 11 (234 days, 1 WNV)
• Cleveland County: March 23 to November 12 (234 days, 27 WNV)
• McClain County: March 23 to November 11 (233 days, 0 WNV)
• Cherokee County: March 23 to November 10 (232 days, 0 WNV)

West Nile in Logan County

From 1999 to 2025, CDC ArboNET counted 8 human West Nile cases in Logan County (4 neuroinvasive) across 6 years. The worst was 2012 with 3; the latest was 2025.

Background: when the season starts across the US; how the dates are worked out.