Knife River, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knife River, a community in Lake County, Minnesota.
Today
75°F
Sunny
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 for Knife River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Sunny | 5 to 10 mph W | 1% |
| Tonight | 54°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Wednesday | 78°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 59°F | Partly Cloudy | 0 to 5 mph SW | 2% |
| Thursday | 83°F | Sunny | 5 to 10 mph SW | 11% |
| Thursday Night | 63°F | Mostly Clear | 5 mph SW | 4% |
| Friday | 84°F | Sunny then Slight Chance Showers And Thunderstorms | 5 mph SW | 20% |
| Friday Night | 60°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 | 60°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 33% |
| Sunday | 77°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 24% |
| Sunday Night | 59°F | Slight Chance Rain Showers then Partly Cloudy | 0 mph | 20% |
| Monday | 76°F | Slight Chance Rain Showers | 0 to 5 mph NW | 17% |
| Monday Night | 58°F | Slight Chance Rain Showers | 0 mph | 17% |
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 Aug 4, 2026.