Coleharbor, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coleharbor, a city in Mclean County, North Dakota.
Tonight
26°F
Mostly Clear
Mostly clear. Low around 26, with temperatures rising to around 31 overnight. Northwest wind around 7 mph, with gusts as high as 18 mph.
7-day forecast for Coleharbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 26°F | Mostly Clear | 7 mph NW | 0% |
| Wednesday | 52°F | Mostly Sunny | 6 to 12 mph N | 0% |
| Wednesday Night | 25°F | Partly Cloudy | 5 to 8 mph N | 0% |
| Thursday | 43°F | Mostly Sunny | 5 mph NE | 0% |
| Thursday Night | 24°F | Partly Cloudy | 7 mph S | 0% |
| Friday | 52°F | Mostly Sunny | 6 to 9 mph SW | 0% |
| Friday Night | 31°F | Mostly Clear | 6 to 9 mph SW | 1% |
| Saturday | 55°F | Mostly Sunny | 9 to 18 mph W | 3% |
| Saturday Night | 30°F | Mostly Clear | 5 to 10 mph W | 1% |
| Sunday | 59°F | Sunny | 5 to 12 mph SW | 0% |
| Sunday Night | 38°F | Partly Cloudy | 10 to 16 mph SW | 0% |
| Monday | 57°F | Sunny | 10 to 18 mph W | 0% |
| Monday Night | 31°F | Partly Cloudy | 8 mph W | 1% |
| Tuesday | 55°F | Mostly Sunny | 6 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Coleharbor (47.543, -101.221). Updated through the day.
Growing snapshot for Coleharbor
Last spring frost
May 12
First fall frost
Oct 3
Growing season
143 days
Hardiness zone
4a
More local growing data for Coleharbor: nearby ZIP 58531 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
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Max
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Ryder
Turtle Lake
Underwood
Washburn
White Shield
Climate data from the nearest NOAA station, Riverdale, Nd (9 mi from Coleharbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.