Mosquito season in McKenzie County, ND: when it starts and ends
Mosquito months in McKenzie County
In a normal year mosquito season in McKenzie 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 McKenzie 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.
- 12 West Nile cases since 2016: you should wear EPA-registered repellent at dusk July to July, and check ND spray notices.
McKenzie County against the rest of ND
McKenzie County has the 27th longest season of 53 ND counties, at 149 days against 160 in Sheridan County and 135 in Rolette County. Its mean temperature is 42.2°F.
- Kidder County: May 6 to October 2 (149 days, 2 WNV)
- Logan County: May 6 to October 2 (149 days, 0 WNV)
- Hettinger County: May 7 to October 3 (149 days, 5 WNV)
- Bottineau County: May 5 to September 30 (148 days, 6 WNV)
West Nile in McKenzie County
From 1999 to 2025, CDC ArboNET counted 30 human West Nile cases in McKenzie County (4 neuroinvasive) across 8 years. The worst was 2003 with 10; the latest was 2024.
More: how the dates are worked out · reading the West Nile counts.