Mosquito season in Becker County, MN: when it starts and ends
Mosquito months in Becker County
In a normal year mosquito season in Becker County, MN starts around May 5 and ends around October 3, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Becker 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 3.
- 5 West Nile cases since 2016 (last 2025): you should use repellent at dusk July, more so if over 60.
Becker County against the rest of MN
Becker County has the 63rd longest season of 87 MN counties, at 151 days against 176 in Winona County and 118 in Cook County. Its mean temperature is 40.6°F.
- Kanabec County: May 4 to October 4 (153 days, 0 WNV)
- Mille Lacs County: May 4 to October 4 (153 days, 3 WNV)
- Otter Tail County: May 5 to October 3 (151 days, 9 WNV)
- Chisago County: May 6 to October 4 (151 days, 2 WNV)
West Nile in Becker County
From 1999 to 2025, CDC ArboNET counted 19 human West Nile cases in Becker County (4 neuroinvasive) across 11 years. The worst was 2007 with 5; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.