Mosquito season in Howard County, MO: when it starts and ends
Mosquito months in Howard County
In a normal year mosquito season in Howard County, MO starts around April 2 and ends around October 31, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Howard County, and when
- Start tipping out standing water weekly by March 19.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 31.
- No West Nile cases since 2016, so bites in Howard County are a nuisance; check window screens.
Howard County against the rest of MO
Howard County has the 55th longest season of 115 MO counties, at 212 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 54.6°F.
- Wright County: April 2 to November 1 (213 days, 0 WNV)
- Cass County: April 2 to October 31 (212 days, 1 WNV)
- Platte County: April 2 to October 30 (212 days, 3 WNV)
- Christian County: April 3 to November 1 (212 days, 0 WNV)
West Nile in Howard County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Howard County (1 neuroinvasive) across 2 years. The worst was 2005 with 1; the latest was 2005.
Background: when the season starts across the US; how the dates are worked out.