Mosquito season in Latah County, ID: when it starts and ends
Mosquito months in Latah County
In a normal year mosquito season in Latah County, ID starts around May 4 and ends around October 5, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Latah County, and when
- Start tipping out standing water weekly by April 20.
- Book any yard treatment for early May, ahead of the August peak.
- Repellent can go away after October 5.
- No West Nile cases since 2016, so bites in Latah County are a nuisance; check window screens.
Latah County against the rest of ID
Latah County has the 18th longest season of 44 ID counties, at 154 days against 194 in Canyon County and 85 in Fremont County. Its mean temperature is 47°F.
- Benewah County: May 3 to October 7 (157 days, 0 WNV)
- Boundary County: April 30 to October 1 (154 days, 0 WNV)
- Bannock County: May 4 to October 4 (153 days, 1 WNV)
- Owyhee County: May 9 to October 9 (153 days, 11 WNV)
West Nile in Latah County
CDC ArboNET lists no human West Nile cases for Latah County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
Background: when the season starts across the US; how the dates are worked out.