Mosquito season in Muscatine County, IA: when it starts and ends
Mosquito months in Muscatine County
In a normal year mosquito season in Muscatine County, IA starts around April 14 and ends around October 22, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Muscatine 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 22.
- No West Nile cases since 2016, so bites in Muscatine County are a nuisance; check window screens.
Muscatine County against the rest of IA
Muscatine County has the 8th longest season of 99 IA counties, at 191 days against 198 in Des Moines County and 160 in Worth County. Its mean temperature is 50.2°F.
- Johnson County: April 13 to October 21 (191 days, 7 WNV)
- Mills County: April 13 to October 21 (191 days, 3 WNV)
- Van Buren County: April 14 to October 22 (191 days, 1 WNV)
- Page County: April 14 to October 21 (190 days, 2 WNV)
West Nile in Muscatine County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Muscatine County (2 neuroinvasive) across 3 years. The worst was 2007 with 1; the latest was 2007.
Background: when the season starts across the US; how the dates are worked out.