Mosquito season in Lawrence County, MO: when it starts and ends
Mosquito months in Lawrence County
In a normal year mosquito season in Lawrence County, MO starts around April 3 and ends around October 30, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lawrence County, and when
- Start tipping out standing water weekly by March 20.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 30.
- No West Nile cases since 2016, so bites in Lawrence County are a nuisance; check window screens.
Lawrence County against the rest of MO
Lawrence County has the 64th longest season of 115 MO counties, at 210 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 56.5°F.
- Audrain County: April 3 to October 30 (210 days, 1 WNV)
- Dent County: April 3 to October 30 (210 days, 0 WNV)
- Randolph County: April 3 to October 30 (210 days, 1 WNV)
- Howell County: April 4 to October 31 (210 days, 1 WNV)
West Nile in Lawrence County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Lawrence County (2 neuroinvasive) across 2 years. The worst was 2013 with 1; the latest was 2013.
See how the dates are worked out, and when the season starts across the US.