Mosquito season in Adair County, IA: when it starts and ends
Mosquito months in Adair County
In a normal year mosquito season in Adair County, IA starts around April 17 and ends around October 20, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Adair County, and when
- Start tipping out standing water weekly by April 3.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 20.
- No West Nile cases since 2016, so bites in Adair County are a nuisance; check window screens.
Adair County against the rest of IA
Adair County has the 28th longest season of 99 IA counties, at 186 days against 198 in Des Moines County and 160 in Worth County. Its mean temperature is 49.1°F.
- Linn County: April 17 to October 21 (187 days, 4 WNV)
- Dallas County: April 16 to October 19 (186 days, 0 WNV)
- Clinton County: April 17 to October 19 (186 days, 3 WNV)
- Henry County: April 17 to October 20 (186 days, 2 WNV)
West Nile in Adair County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Adair County (1 neuroinvasive) across 2 years. The worst was 2007 with 1; the latest was 2007.
More: how the dates are worked out · when the season starts across the US.