Mosquito season in Blaine County, OK: when it starts and ends
Mosquito months in Blaine County
In a normal year mosquito season in Blaine County, OK starts around April 3 and ends around November 4, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Blaine County, and when
- Start tipping out standing water weekly by March 20.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 4.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk June to September, more so if over 60.
Blaine County against the rest of OK
Blaine County has the 70th longest season of 77 OK counties, at 215 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 59°F.
- Pawnee County: March 31 to November 1 (215 days, 1 WNV)
- Washington County: April 1 to November 2 (215 days, 4 WNV)
- Ellis County: April 5 to November 4 (213 days, 2 WNV)
- Delaware County: April 3 to October 30 (210 days, 1 WNV)
West Nile in Blaine County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Blaine County (3 neuroinvasive) across 3 years. The worst was 2015 with 2; the latest was 2018.
Background: when the season starts across the US; how the dates are worked out.