Mosquito season in Logan County, ND: when it starts and ends
Mosquito months in Logan County
In a normal year mosquito season in Logan County, ND starts around May 6 and ends around October 2, about 21 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Logan County, and when
- Start tipping out standing water weekly by April 22.
- 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 Logan County are a nuisance; check window screens.
Logan County against the rest of ND
Logan County has the 26th longest season of 53 ND counties, at 149 days against 160 in Sheridan County and 135 in Rolette County. Its mean temperature is 41.1°F.
- Grand Forks County: May 6 to October 1 (149 days, 17 WNV)
- Kidder County: May 6 to October 2 (149 days, 2 WNV)
- McKenzie County: May 6 to October 2 (149 days, 12 WNV)
- Hettinger County: May 7 to October 3 (149 days, 5 WNV)
West Nile in Logan County
From 1999 to 2025, CDC ArboNET counted 7 human West Nile cases in Logan County (3 neuroinvasive) across 4 years. The worst was 2003 with 4; the latest was 2014.
More: how the dates are worked out · when the season starts across the US.