Mosquito season in Saline County, MO: when it starts and ends
Mosquito months in Saline County
In a normal year mosquito season in Saline County, MO starts around April 4 and ends around October 29, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Saline County, and when
- Start tipping out standing water weekly by March 21.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 29.
- 1 West Nile case since 2016 (last 2023): you should use repellent at dusk June to August, more so if over 60.
Saline County against the rest of MO
Saline County has the 73rd longest season of 115 MO counties, at 208 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 54°F.
- Carroll County: April 4 to October 29 (208 days, 0 WNV)
- Lafayette County: April 4 to October 29 (208 days, 0 WNV)
- Oregon County: April 5 to October 30 (208 days, 1 WNV)
- Perry County: April 5 to October 30 (208 days, 0 WNV)
West Nile in Saline County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Saline County (3 neuroinvasive) across 4 years. The worst was 2023 with 1; the latest was 2023.
More: how the dates are worked out · when mosquitoes go away for the winter.