Coleharbor, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coleharbor, a city in Mclean County, North Dakota.
Overnight
55°F
Patchy Fog
Patchy fog after 4am. Cloudy, with a low around 55. Southeast wind around 3 mph.
7-day forecast for Coleharbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Patchy Fog | 3 mph SE | 2% |
| Saturday | 66°F | Patchy Fog then Slight Chance Rain Showers | 1 to 13 mph NE | 23% |
| Saturday Night | 48°F | Chance Rain Showers | 14 mph NE | 28% |
| Sunday | 65°F | Slight Chance Rain Showers then Mostly Cloudy | 12 mph E | 23% |
| Sunday Night | 44°F | Mostly Cloudy | 6 to 9 mph E | 11% |
| Monday | 71°F | Mostly Sunny | 5 to 12 mph SE | 2% |
| Monday Night | 45°F | Mostly Clear | 10 mph SE | 1% |
| Tuesday | 71°F | Mostly Sunny | 12 to 21 mph SE | 2% |
| Tuesday Night | 50°F | Partly Cloudy | 17 mph S | 4% |
| Wednesday | 75°F | Mostly Sunny | 15 to 18 mph SE | 6% |
| Wednesday Night | 52°F | Partly Cloudy | 9 to 14 mph SE | 13% |
| Thursday | 78°F | Mostly Sunny | 8 to 12 mph SE | 11% |
| Thursday Night | 53°F | Partly Cloudy | 10 mph SE | 11% |
| Friday | 78°F | Mostly Sunny | 10 to 18 mph SE | 9% |
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
Benedict
Butte
Garrison
Max
Mercer
Pick City
Riverdale
Ruso
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 Sep 19, 2026.