Mosquito season in Wadena County, MN: when it starts and ends
Mosquito months in Wadena County
In a normal year mosquito season in Wadena County, MN starts around May 7 and ends around October 1, about 21 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Wadena County, and when
- Start tipping out standing water weekly by April 23.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 1.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk July, more so if over 60.
Wadena County against the rest of MN
Wadena County has the 74th longest season of 87 MN counties, at 148 days against 176 in Winona County and 118 in Cook County. Its mean temperature is 40.1°F.
- Hubbard County: May 6 to October 1 (148 days, 0 WNV)
- Aitkin County: May 7 to October 2 (148 days, 1 WNV)
- Kittson County: May 6 to September 30 (147 days, 0 WNV)
- Pine County: May 7 to October 2 (147 days, 1 WNV)
West Nile in Wadena County
From 1999 to 2025, CDC ArboNET counted 6 human West Nile cases in Wadena County (4 neuroinvasive) across 5 years. The worst was 2013 with 2; the latest was 2018.
See how the dates are worked out, and when the season starts across the US.