Knife River, MN Weather & Growing Conditions
Today
75°F
Mostly Sunny
Mostly sunny. High near 75, with temperatures falling to around 73 in the afternoon. West wind 5 to 10 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Mostly Sunny | 5 to 10 mph W | 1% |
| Tonight | 53°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Wednesday | 77°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 0 to 5 mph SW | 2% |
| Thursday | 82°F | Sunny | 5 to 10 mph SW | 12% |
| Thursday Night | 62°F | Mostly Clear | 5 mph SW | 4% |
| Friday | 83°F | Sunny then Slight Chance Showers And Thunderstorms | 5 mph SW | 20% |
| Friday Night | 59°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph W | 32% |
| Saturday | 78°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 24% |
| Saturday Night | 59°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 32% |
| Sunday | 76°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 24% |
| Sunday Night | 58°F | Slight Chance Rain Showers then Partly Cloudy | 0 mph | 19% |
| Monday | 76°F | Slight Chance Rain Showers | 0 to 5 mph NW | 16% |
| Monday Night | 57°F | Slight Chance Rain Showers | 0 mph | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Knife River, MN
Last spring frost
May 12
First fall frost
Oct 6
Growing season
145 days
Hardiness zone
4b
Explore more for Knife River, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Two Harbors, Mn (7.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.