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.
Overnight
54°F
Patchy Drizzle
Patchy drizzle and patchy fog. Cloudy, with a low around 54. Northeast wind 0 to 5 mph.
7-day forecast for Glen Ullin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Patchy Drizzle | 0 to 5 mph NE | 10% |
| Saturday | 66°F | Patchy Fog then Chance Rain Showers | 0 to 9 mph NE | 39% |
| Saturday Night | 48°F | Rain Showers Likely | 12 mph E | 64% |
| Sunday | 61°F | Rain Showers Likely | 12 mph E | 65% |
| Sunday Night | 45°F | Chance Rain Showers | 2 to 8 mph E | 32% |
| Monday | 68°F | Mostly Sunny | 1 to 12 mph SE | 6% |
| Monday Night | 45°F | Partly Cloudy | 10 mph SE | 1% |
| Tuesday | 70°F | Mostly Sunny | 10 to 22 mph SE | 2% |
| Tuesday Night | 49°F | Mostly Cloudy | 13 to 18 mph SE | 4% |
| Wednesday | 76°F | Mostly Sunny | 13 to 17 mph SE | 8% |
| Wednesday Night | 51°F | Partly Cloudy | 3 to 14 mph SE | 13% |
| Thursday | 78°F | Mostly Sunny | 3 to 10 mph SE | 10% |
| Thursday Night | 52°F | Partly Cloudy | 9 mph SE | 10% |
| Friday | 79°F | Mostly Sunny | 8 to 20 mph SE | 5% |
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.