Mosquito season in Appanoose County, IA: when it starts and ends
Mosquito months in Appanoose County
In a normal year mosquito season in Appanoose County, IA starts around April 17 and ends around October 21, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Appanoose 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 21.
- 1 West Nile case since 2016 (last 2016): you should use repellent at dusk June to August, more so if over 60.
Appanoose County against the rest of IA
Appanoose County has the 25th longest season of 99 IA counties, at 187 days against 198 in Des Moines County and 160 in Worth County. Its mean temperature is 50°F.
- Cedar County: April 16 to October 20 (187 days, 2 WNV)
- Ringgold County: April 16 to October 20 (187 days, 0 WNV)
- Linn County: April 17 to October 21 (187 days, 4 WNV)
- Dallas County: April 16 to October 19 (186 days, 0 WNV)
West Nile in Appanoose County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Appanoose County (1 neuroinvasive) across 1 year. The worst was 2016 with 1; the latest was 2016.
More: how the dates are worked out · when mosquitoes go away for the winter.