Middle River, MN Weather & Growing Conditions
Today
67°F
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers between 2pm and 4pm. Mostly cloudy. High near 67, with temperatures falling to around 65 in the afternoon. Northeast wind 2 to 13 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Mostly Cloudy then Slight Chance Rain Showers | 2 to 13 mph NE | 23% |
| Tonight | 45°F | Partly Cloudy | 8 to 13 mph NNE | 1% |
| Sunday | 63°F | Partly Sunny | 10 mph ENE | 0% |
| Sunday Night | 39°F | Mostly Cloudy | 6 to 9 mph E | 0% |
| Monday | 66°F | Sunny | 5 to 8 mph SE | 0% |
| Monday Night | 38°F | Mostly Clear | 8 mph SE | 0% |
| Tuesday | 66°F | Sunny | 8 to 15 mph SSE | 0% |
| Tuesday Night | 41°F | Mostly Clear | 13 mph SSE | 0% |
| Wednesday | 67°F | Mostly Sunny | 13 to 18 mph SSE | 2% |
| Wednesday Night | 46°F | Partly Cloudy | 9 to 14 mph SSE | 11% |
| Thursday | 70°F | Partly Sunny | 9 to 14 mph SSE | 10% |
| Thursday Night | 50°F | Partly Cloudy | 12 mph SSE | 10% |
| Friday | 72°F | Mostly Sunny | 9 to 16 mph S | 6% |
| Friday Night | 52°F | Mostly Cloudy | 15 mph SSE | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Middle River, MN
Last spring frost
May 6
First fall frost
Oct 3
Growing season
148 days
Hardiness zone
3b
Explore more for Middle River, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Agassiz Refuge, Mn (7.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.