Mosquito season in Rice County, MN: when it starts and ends
Mosquito months in Rice County
In a normal year mosquito season in Rice County, MN starts around April 29 and ends around October 9, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Rice County, and when
- Start tipping out standing water weekly by April 15.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 9.
- 6 West Nile cases since 2016 (last 2023): you should use repellent at dusk July to July, more so if over 60.
Rice County against the rest of MN
Rice County has the 36th longest season of 87 MN counties, at 164 days against 176 in Winona County and 118 in Cook County. Its mean temperature is 44.5°F.
- Wright County: April 28 to October 9 (164 days, 7 WNV)
- Carver County: April 29 to October 10 (164 days, 11 WNV)
- Lac qui Parle County: April 28 to October 8 (163 days, 3 WNV)
- Traverse County: April 28 to October 9 (163 days, 7 WNV)
West Nile in Rice County
From 1999 to 2025, CDC ArboNET counted 9 human West Nile cases in Rice County (6 neuroinvasive) across 6 years. The worst was 2018 with 2; the latest was 2023.
Background: reading the West Nile counts; how the dates are worked out.