Mosquito season in Bannock County, ID: when it starts and ends
Mosquito months in Bannock County
In a normal year mosquito season in Bannock County, ID starts around May 4 and ends around October 4, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Bannock 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 4.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk July, more so if over 60.
Bannock County against the rest of ID
Bannock County has the 19th longest season of 44 ID counties, at 153 days against 194 in Canyon County and 85 in Fremont County. Its mean temperature is 46.1°F.
- Boundary County: April 30 to October 1 (154 days, 0 WNV)
- Latah County: May 4 to October 5 (154 days, 0 WNV)
- Owyhee County: May 9 to October 9 (153 days, 11 WNV)
- Lincoln County: May 8 to October 7 (152 days, 2 WNV)
West Nile in Bannock County
From 1999 to 2025, CDC ArboNET counted 30 human West Nile cases in Bannock County (5 neuroinvasive) across 4 years. The worst was 2006 with 23; the latest was 2018.
Background: when the season starts across the US; how the dates are worked out.