Mosquito season in Emmons County, ND: when it starts and ends
Mosquito months in Emmons County
In a normal year mosquito season in Emmons County, ND starts around May 3 and ends around October 4, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Emmons County, and when
- Start tipping out standing water weekly by April 19.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 4.
- 4 West Nile cases since 2016 (last 2023): you should use repellent at dusk July to July, more so if over 60.
Emmons County against the rest of ND
Emmons County has the 9th longest season of 53 ND counties, at 154 days against 160 in Sheridan County and 135 in Rolette County. Its mean temperature is 42.9°F.
- Walsh County: May 2 to October 4 (154 days, 5 WNV)
- Cass County: May 3 to October 4 (154 days, 79 WNV)
- Burleigh County: May 4 to October 4 (154 days, 128 WNV)
- Sargent County: May 3 to October 4 (153 days, 8 WNV)
West Nile in Emmons County
From 1999 to 2025, CDC ArboNET counted 25 human West Nile cases in Emmons County (7 neuroinvasive) across 10 years. The worst was 2003 with 7; the latest was 2023.
More: how the dates are worked out · reading the West Nile counts.