Mosquito season in Stark County, ND: when it starts and ends
Mosquito months in Stark County
In a normal year mosquito season in Stark County, ND starts around May 8 and ends around October 2, about 21 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Stark County, and when
- Start tipping out standing water weekly by April 24.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 2.
- 21 West Nile cases since 2016: you should wear EPA-registered repellent at dusk July, and check ND spray notices.
Stark County against the rest of ND
Stark County has the 33rd longest season of 53 ND counties, at 147 days against 160 in Sheridan County and 135 in Rolette County. Its mean temperature is 42.5°F.
- McIntosh County: May 7 to October 2 (148 days, 4 WNV)
- Griggs County: May 7 to October 1 (147 days, 6 WNV)
- Ramsey County: May 7 to September 30 (146 days, 12 WNV)
- Steele County: May 7 to September 30 (146 days, 2 WNV)
West Nile in Stark County
From 1999 to 2025, CDC ArboNET counted 71 human West Nile cases in Stark County (22 neuroinvasive) across 13 years. The worst was 2003 with 22; the latest was 2025.
Background: reading the West Nile counts; how the dates are worked out.