Boy River, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boy River, a city in Cass County, Minnesota.
Overnight
55°F
Mostly Cloudy
Mostly cloudy, with a low around 55. Northwest wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Boy River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Mostly Cloudy | 5 mph NW | 3% |
| Tuesday | 71°F | Mostly Sunny | 5 to 10 mph W | 1% |
| Tuesday Night | 49°F | Mostly Clear | 0 to 5 mph W | 0% |
| Wednesday | 77°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 0 to 5 mph SW | 12% |
| Thursday | 83°F | Sunny | 5 to 10 mph SW | 12% |
| Thursday Night | 61°F | Mostly Clear | 0 to 5 mph SW | 12% |
| Friday | 83°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 16% |
| Friday Night | 56°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 18% |
| Saturday | 80°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 23% |
| Saturday Night | 57°F | Slight Chance Showers And Thunderstorms | 0 mph | 24% |
| Sunday | 79°F | Slight Chance Rain Showers | 0 to 5 mph N | 17% |
| Sunday Night | 56°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 0 mph | 18% |
| Monday | 79°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 18% |
Forecast source: National Weather Service (api.weather.gov) for Boy River (47.168, -94.124). Updated through the day.
Growing snapshot for Boy River
Last spring frost
May 8
First fall frost
Oct 1
Growing season
144 days
Hardiness zone
3b
More local growing data for Boy River: nearby ZIP 56641 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Backus
Bena
Cass Lake
Chickamaw Beach
Federal Dam
Hackensack
Jenkins
Longville
Motley
Pequot Lakes
Pillager
Pine River
Remer
Walker
Whipholt
Climate data from the nearest NOAA station, Leech Lake, Mn (3.6 mi from Boy River). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.