Mosquito season in Christian County, MO: when it starts and ends
Mosquito months in Christian County
In a normal year mosquito season in Christian County, MO starts around April 3 and ends around November 1, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Christian 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 November 1.
- No West Nile cases since 2016, so bites in Christian County are a nuisance; check window screens.
Christian County against the rest of MO
Christian County has the 57th longest season of 115 MO counties, at 212 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 55°F.
- Howard County: April 2 to October 31 (212 days, 0 WNV)
- Platte County: April 2 to October 30 (212 days, 3 WNV)
- Johnson County: April 3 to October 31 (211 days, 0 WNV)
- Warren County: April 3 to October 31 (211 days, 0 WNV)
West Nile in Christian County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Christian County (1 neuroinvasive) across 1 year. The worst was 2006 with 1; the latest was 2006.
Background: when the season starts across the US; how the dates are worked out.