Mosquito season in Oneida County, ID: when it starts and ends
Mosquito months in Oneida County
In a normal year mosquito season in Oneida County, ID starts around May 4 and ends around October 2, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Oneida County, and when
- Start tipping out standing water weekly by April 20.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 2.
- No West Nile cases since 2016, so bites in Oneida County are a nuisance; check window screens.
Oneida County against the rest of ID
Oneida County has the 23rd longest season of 44 ID counties, at 151 days against 194 in Canyon County and 85 in Fremont County. Its mean temperature is 46.5°F.
- Lincoln County: May 8 to October 7 (152 days, 2 WNV)
- Bonner County: May 3 to October 1 (151 days, 0 WNV)
- Madison County: May 5 to October 3 (151 days, 0 WNV)
- Shoshone County: May 8 to September 30 (145 days, 0 WNV)
West Nile in Oneida County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Oneida County (0 neuroinvasive) across 2 years. The worst was 2009 with 1; the latest was 2009.
See how the dates are worked out, and when the season starts across the US.