Mosquito season in Eddy County, ND: when it starts and ends
Mosquito months in Eddy County
In a normal year mosquito season in Eddy County, ND starts around May 6 and ends around October 1, about 21 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Eddy 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 1.
- No West Nile cases since 2016, so bites in Eddy County are a nuisance; check window screens.
Eddy County against the rest of ND
Eddy County has the 23rd longest season of 53 ND counties, at 149 days against 160 in Sheridan County and 135 in Rolette County. Its mean temperature is 40.3°F.
- McLean County: May 6 to October 3 (150 days, 15 WNV)
- Barnes County: May 6 to October 2 (149 days, 15 WNV)
- Grand Forks County: May 6 to October 1 (149 days, 17 WNV)
- Kidder County: May 6 to October 2 (149 days, 2 WNV)
West Nile in Eddy County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Eddy County (0 neuroinvasive) across 4 years. The worst was 2003 with 2; the latest was 2012.
More: how the dates are worked out · when mosquitoes go away for the winter.