Mosquito season in Minidoka County, ID: when it starts and ends
Mosquito months in Minidoka County
In a normal year mosquito season in Minidoka County, ID starts around May 2 and ends around October 11, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Minidoka County, and when
- Start tipping out standing water weekly by April 18.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 11.
- No West Nile cases since 2016, so bites in Minidoka County are a nuisance; check window screens.
Minidoka County against the rest of ID
Minidoka County has the 13th longest season of 44 ID counties, at 162 days against 194 in Canyon County and 85 in Fremont County. Its mean temperature is 48.2°F.
- Franklin County: April 30 to October 10 (163 days, 2 WNV)
- Washington County: April 28 to October 7 (162 days, 19 WNV)
- Cassia County: May 3 to October 11 (161 days, 1 WNV)
- Kootenai County: May 1 to October 8 (160 days, 2 WNV)
West Nile in Minidoka County
From 1999 to 2025, CDC ArboNET counted 25 human West Nile cases in Minidoka County (9 neuroinvasive) across 2 years. The worst was 2006 with 24; the latest was 2013.
See how the dates are worked out, and when the season starts across the US.