Mosquito season in Grady County, OK: when it starts and ends
Mosquito months in Grady County
In a normal year mosquito season in Grady County, OK starts around March 25 and ends around November 8, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Grady County, and when
- Start tipping out standing water weekly by March 11.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 8.
- 1 West Nile case since 2016 (last 2024): you should use repellent at dusk May to September, more so if over 60.
Grady County against the rest of OK
Grady County has the 45th longest season of 77 OK counties, at 228 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 61.3°F.
- Major County: March 26 to November 10 (229 days, 3 WNV)
- Nowata County: March 26 to November 10 (229 days, 0 WNV)
- Rogers County: March 25 to November 8 (228 days, 2 WNV)
- Greer County: March 27 to November 10 (228 days, 0 WNV)
West Nile in Grady County
From 1999 to 2025, CDC ArboNET counted 7 human West Nile cases in Grady County (3 neuroinvasive) across 5 years. The worst was 2012 with 2; the latest was 2024.
More: how the dates are worked out · when the season starts across the US.