Mosquito season in Mower County, MN: when it starts and ends
Mosquito months in Mower County
In a normal year mosquito season in Mower County, MN starts around April 30 and ends around October 8, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Mower 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 8.
- No West Nile cases since 2016, so bites in Mower County are a nuisance; check window screens.
Mower County against the rest of MN
Mower County has the 43rd longest season of 87 MN counties, at 161 days against 176 in Winona County and 118 in Cook County. Its mean temperature is 43.7°F.
- Goodhue County: April 29 to October 8 (162 days, 1 WNV)
- Sherburne County: April 29 to October 8 (162 days, 5 WNV)
- Renville County: April 30 to October 7 (161 days, 5 WNV)
- Kandiyohi County: April 30 to October 8 (160 days, 9 WNV)
West Nile in Mower County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Mower County (3 neuroinvasive) across 3 years. The worst was 2002 with 3; the latest was 2007.
More: how the dates are worked out · when the season starts across the US.