Mosquito season in Allamakee County, IA: when it starts and ends
Mosquito months in Allamakee County
In a normal year mosquito season in Allamakee County, IA starts around April 27 and ends around October 12, about 24 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Allamakee County, and when
- Start tipping out standing water weekly by April 13.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 12.
- 1 West Nile case since 2016 (last 2017): you should use repellent at dusk July to July, more so if over 60.
Allamakee County against the rest of IA
Allamakee County has the 92nd longest season of 99 IA counties, at 168 days against 198 in Des Moines County and 160 in Worth County. Its mean temperature is 45.6°F.
- Mitchell County: April 26 to October 11 (168 days, 1 WNV)
- Winnebago County: April 26 to October 11 (168 days, 0 WNV)
- Clayton County: April 27 to October 11 (167 days, 0 WNV)
- Fayette County: April 27 to October 11 (167 days, 1 WNV)
West Nile in Allamakee County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Allamakee County (1 neuroinvasive) across 1 year. The worst was 2017 with 1; the latest was 2017.
See how the dates are worked out, and when the season starts across the US.