Mosquito season in Nez Perce County, ID: when it starts and ends
Mosquito months in Nez Perce County
In a normal year mosquito season in Nez Perce County, ID starts around April 22 and ends around October 14, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Nez Perce County, and when
- Start tipping out standing water weekly by April 8.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 14.
- No West Nile cases since 2016, so bites in Nez Perce County are a nuisance; check window screens.
Nez Perce County against the rest of ID
Nez Perce County has the 5th longest season of 44 ID counties, at 175 days against 194 in Canyon County and 85 in Fremont County. Its mean temperature is 50°F.
- Ada County: April 12 to October 23 (193 days, 36 WNV)
- Gooding County: April 19 to October 15 (179 days, 9 WNV)
- Jerome County: April 25 to October 14 (172 days, 0 WNV)
- Twin Falls County: April 26 to October 13 (171 days, 10 WNV)
West Nile in Nez Perce County
CDC ArboNET lists no human West Nile cases for Nez Perce County from 1999 to 2025.
See how the dates are worked out, and when mosquitoes go away for the winter.