Mosquito season in Dickey County, ND: when it starts and ends
Mosquito months in Dickey County
In a normal year mosquito season in Dickey County, ND starts around April 30 and ends around October 5, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Dickey County, and when
- Start tipping out standing water weekly by April 16.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 5.
- 9 West Nile cases since 2016 (last 2025): you should use repellent at dusk July to July, more so if over 60.
Dickey County against the rest of ND
Dickey County has the 4th longest season of 53 ND counties, at 158 days against 160 in Sheridan County and 135 in Rolette County. Its mean temperature is 43°F.
- Richland County: May 1 to October 6 (159 days, 11 WNV)
- Sioux County: May 1 to October 6 (159 days, 4 WNV)
- Traill County: May 2 to October 5 (157 days, 5 WNV)
- LaMoure County: May 2 to October 5 (156 days, 6 WNV)
West Nile in Dickey County
From 1999 to 2025, CDC ArboNET counted 54 human West Nile cases in Dickey County (12 neuroinvasive) across 13 years. The worst was 2003 with 18; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.