Mosquito season in Alfalfa County, OK: when it starts and ends
Mosquito months in Alfalfa County
In a normal year mosquito season in Alfalfa County, OK starts around April 1 and ends around November 5, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Alfalfa County, and when
- Start tipping out standing water weekly by March 18.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 5.
- 1 West Nile case since 2016 (last 2024): you should use repellent at dusk June to September, more so if over 60.
Alfalfa County against the rest of OK
Alfalfa County has the 63rd longest season of 77 OK counties, at 218 days against 271 in Choctaw County and 193 in Cimarron County. Its mean temperature is 59°F.
- Creek County: March 28 to November 2 (219 days, 1 WNV)
- Pushmataha County: March 31 to November 4 (218 days, 2 WNV)
- Custer County: April 1 to November 5 (218 days, 1 WNV)
- Beckham County: April 1 to November 4 (217 days, 2 WNV)
West Nile in Alfalfa County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Alfalfa County (1 neuroinvasive) across 2 years. The worst was 2012 with 2; the latest was 2024.
Background: when the season starts across the US; how the dates are worked out.