Mosquito season in Red Lake County, MN: when it starts and ends
Mosquito months in Red Lake County
In a normal year mosquito season in Red Lake County, MN starts around May 5 and ends around October 2, about 21 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Red Lake County, and when
- Start tipping out standing water weekly by April 21.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 2.
- 1 West Nile case since 2016 (last 2024): you should use repellent at dusk July, more so if over 60.
Red Lake County against the rest of MN
Red Lake County has the 71st longest season of 87 MN counties, at 149 days against 176 in Winona County and 118 in Cook County. Its mean temperature is 39.8°F.
- Pennington County: May 5 to October 1 (149 days, 0 WNV)
- Polk County: May 5 to October 2 (149 days, 15 WNV)
- Hubbard County: May 6 to October 1 (148 days, 0 WNV)
- Aitkin County: May 7 to October 2 (148 days, 1 WNV)
West Nile in Red Lake County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Red Lake County (1 neuroinvasive) across 2 years. The worst was 2024 with 1; the latest was 2024.
More: how the dates are worked out · when mosquitoes go away for the winter.