Glen Ullin, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glen Ullin, a city in Morton County, North Dakota.
Tonight
54°F
Cloudy then Patchy Fog
Patchy fog after 1am. Cloudy, with a low around 54. Southeast wind 0 to 6 mph.
7-day forecast for Glen Ullin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Cloudy then Patchy Fog | 0 to 6 mph SE | 2% |
| Saturday | 66°F | Patchy Fog then Chance Rain Showers | 0 to 10 mph E | 40% |
| Saturday Night | 48°F | Chance Rain Showers | 10 mph E | 50% |
| Sunday | 61°F | Rain Showers Likely | 12 mph E | 57% |
| Sunday Night | 46°F | Rain Showers Likely | 2 to 9 mph E | 57% |
| Monday | 67°F | Partly Sunny | 2 to 12 mph SE | 11% |
| Monday Night | 46°F | Mostly Cloudy | 10 mph SE | 7% |
| Tuesday | 70°F | Partly Sunny | 9 to 21 mph SE | 4% |
| Tuesday Night | 49°F | Mostly Cloudy | 13 to 17 mph SE | 7% |
| Wednesday | 76°F | Partly Sunny | 12 to 15 mph SE | 12% |
| Wednesday Night | 51°F | Slight Chance Rain Showers | 2 to 12 mph SE | 15% |
| Thursday | 79°F | Mostly Sunny | 2 to 9 mph SE | 6% |
| Thursday Night | 52°F | Mostly Clear | 8 mph SE | 5% |
| Friday | 78°F | Mostly Sunny | 7 to 17 mph SE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Glen Ullin (46.812, -101.833). Updated through the day.
Growing snapshot for Glen Ullin
Last spring frost
May 19
First fall frost
Sep 21
Growing season
123 days
Hardiness zone
4a
More local growing data for Glen Ullin: nearby ZIP 58631 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hebron, Nd (12.1 mi from Glen Ullin). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.