Coleraine, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coleraine, a city in Itasca County, Minnesota.
Tonight
48°F
Chance Rain Showers then Patchy Fog
A chance of rain showers before 8pm, then a slight chance of drizzle between 8pm and 10pm, then patchy fog. Mostly cloudy, with a low around 48. East wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Coleraine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Chance Rain Showers then Patchy Fog | 5 to 10 mph E | 26% |
| Saturday | 67°F | Patchy Fog then Partly Sunny | 5 mph NE | 3% |
| Saturday Night | 48°F | Mostly Cloudy | 5 mph N | 2% |
| Sunday | 63°F | Partly Sunny | 5 to 10 mph NE | 0% |
| Sunday Night | 40°F | Mostly Cloudy | 5 mph E | 0% |
| Monday | 61°F | Mostly Sunny | 5 mph E | 0% |
| Monday Night | 38°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Tuesday | 62°F | Sunny | 5 mph SE | 0% |
| Tuesday Night | 39°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Wednesday | 63°F | Mostly Sunny | 0 to 10 mph SE | 1% |
| Wednesday Night | 43°F | Partly Cloudy | 0 to 5 mph SE | 11% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph S | 11% |
| Thursday Night | 46°F | Partly Cloudy | 0 to 5 mph S | 5% |
| Friday | 68°F | Mostly Sunny | 0 to 5 mph S | 4% |
Forecast source: National Weather Service (api.weather.gov) for Coleraine (47.259, -93.454). Updated through the day.
Growing snapshot for Coleraine
Last spring frost
May 17
First fall frost
Sep 24
Growing season
130 days
Hardiness zone
4a
More local growing data for Coleraine: nearby ZIP 55722 weather · frost dates · planting calendar · Minnesota frost dates
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Climate data from the nearest NOAA station, Grand Rpds Forest Lab, Mn (4 mi from Coleraine). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.