Mosquito season in Sequoyah County, OK: when it starts and ends
Mosquito months in Sequoyah County
In a normal year mosquito season in Sequoyah County, OK starts around March 15 and ends around November 16, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Sequoyah County, and when
- Start tipping out standing water weekly by March 1.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 16.
- No West Nile cases since 2016, so bites in Sequoyah County are a nuisance; check window screens.
Sequoyah County against the rest of OK
Sequoyah County has the 15th longest season of 77 OK counties, at 246 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 60.3°F.
- McCurtain County: March 13 to November 14 (246 days, 0 WNV)
- Hughes County: March 15 to November 16 (246 days, 1 WNV)
- Wagoner County: March 15 to November 16 (246 days, 1 WNV)
- Pottawatomie County: March 15 to November 14 (244 days, 10 WNV)
West Nile in Sequoyah County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Sequoyah County (3 neuroinvasive) across 2 years. The worst was 2007 with 2; the latest was 2007.
Background: when the season starts across the US; how the dates are worked out.