Knife River, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knife River, a community in Lake County, Minnesota.
Tonight
50°F
Rain
Rain. Cloudy, with a low around 50. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Knife River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Rain | 10 to 15 mph NE | 87% |
| Wednesday | 53°F | Rain | 10 to 15 mph N | 88% |
| Wednesday Night | 42°F | Light Rain | 10 mph N | 88% |
| Thursday | 45°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 43% |
| Thursday Night | 33°F | Mostly Cloudy | 5 to 10 mph NE | 1% |
| Friday | 40°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Friday Night | 30°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 46°F | Mostly Sunny | 0 to 5 mph SW | 1% |
| Saturday Night | 37°F | Partly Cloudy | 5 mph W | 12% |
| Sunday | 50°F | Mostly Sunny | 5 to 10 mph W | 9% |
| Sunday Night | 37°F | Partly Cloudy | 5 mph W | 3% |
| Monday | 51°F | Mostly Sunny | 5 to 15 mph SW | 0% |
| Monday Night | 38°F | Partly Cloudy | 5 to 10 mph W | 0% |
| Tuesday | 47°F | Mostly Sunny | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Knife River (46.949, -91.784). Updated through the day.
Growing snapshot for Knife River
Last spring frost
May 12
First fall frost
Oct 6
Growing season
145 days
Hardiness zone
4b
More local growing data for Knife River: nearby ZIP 55609 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Two Harbors, Mn (7.1 mi from Knife River). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.