Mosquito season in Crawford County, MO: when it starts and ends
Mosquito months in Crawford County
In a normal year mosquito season in Crawford County, MO starts around April 14 and ends around October 18, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Crawford County, and when
- Start tipping out standing water weekly by March 31.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 18.
- No West Nile cases since 2016, so bites in Crawford County are a nuisance; check window screens.
Crawford County against the rest of MO
Crawford County has the 115th longest season of 115 MO counties, at 187 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 53.6°F.
- Sullivan County: April 14 to October 22 (191 days, 0 WNV)
- Worth County: April 14 to October 21 (190 days, 0 WNV)
West Nile in Crawford County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Crawford County (2 neuroinvasive) across 2 years. The worst was 2002 with 2; the latest was 2005.
Background: when mosquitoes go away for the winter; how the dates are worked out.