Mosquito season in Wright County, MN: when it starts and ends
Mosquito months in Wright County
In a normal year mosquito season in Wright County, MN starts around April 28 and ends around October 9, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Wright County, and when
- Start tipping out standing water weekly by April 14.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 9.
- 7 West Nile cases since 2016 (last 2025): you should use repellent at dusk July to July, more so if over 60.
Wright County against the rest of MN
Wright County has the 34th longest season of 87 MN counties, at 164 days against 176 in Winona County and 118 in Cook County. Its mean temperature is 44°F.
- Pipestone County: April 28 to October 9 (164 days, 4 WNV)
- Swift County: April 28 to October 9 (164 days, 2 WNV)
- Carver County: April 29 to October 10 (164 days, 11 WNV)
- Rice County: April 29 to October 9 (164 days, 6 WNV)
West Nile in Wright County
From 1999 to 2025, CDC ArboNET counted 25 human West Nile cases in Wright County (9 neuroinvasive) across 10 years. The worst was 2003 with 7; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.