Mosquito season in Garfield County, OK: when it starts and ends
Mosquito months in Garfield County
In a normal year mosquito season in Garfield County, OK starts around March 31 and ends around November 7, about 32 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Garfield County, and when
- Start tipping out standing water weekly by March 17.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 7.
- 6 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to September, more so if over 60.
Garfield County against the rest of OK
Garfield County has the 60th longest season of 77 OK counties, at 221 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 59.3°F.
- Okmulgee County: March 29 to November 6 (222 days, 3 WNV)
- Kay County: March 29 to November 5 (221 days, 6 WNV)
- Creek County: March 28 to November 2 (219 days, 1 WNV)
- Pushmataha County: March 31 to November 4 (218 days, 2 WNV)
West Nile in Garfield County
From 1999 to 2025, CDC ArboNET counted 22 human West Nile cases in Garfield County (16 neuroinvasive) across 12 years. The worst was 2013 with 5; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.