Coleharbor, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coleharbor, a city in Mclean County, North Dakota.
Today
73°F
Sunny
Sunny. High near 73, with temperatures falling to around 71 in the afternoon. West wind 12 to 17 mph, with gusts as high as 28 mph.
7-day forecast for Coleharbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 12 to 17 mph W | 0% |
| Tonight | 48°F | Mostly Clear | 3 to 15 mph SW | 0% |
| Wednesday | 82°F | Mostly Sunny | 7 to 17 mph SW | 0% |
| Wednesday Night | 53°F | Mostly Clear | 6 to 15 mph SW | 5% |
| Thursday | 85°F | Sunny | 5 to 14 mph W | 1% |
| Thursday Night | 56°F | Mostly Clear | 5 to 13 mph E | 1% |
| Friday | 84°F | Sunny | 8 to 12 mph N | 0% |
| Friday Night | 55°F | Mostly Clear | 9 mph NE | 2% |
| Saturday | 87°F | Sunny | 8 to 12 mph NE | 2% |
| Saturday Night | 56°F | Mostly Clear | 9 to 14 mph NE | 6% |
| Sunday | 82°F | Mostly Sunny | 8 to 14 mph E | 11% |
| Sunday Night | 56°F | Slight Chance Showers And Thunderstorms | 13 mph E | 32% |
| Monday | 80°F | Chance Showers And Thunderstorms | 10 to 14 mph NE | 32% |
| Monday Night | 55°F | Chance Showers And Thunderstorms | 10 to 14 mph NE | 29% |
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 Aug 4, 2026.