Glen Ullin, ND Weather & Growing Conditions
Tonight
22°F
Mostly Clear
Mostly clear. Low around 22, with temperatures rising to around 28 overnight. Northwest wind 1 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 22°F | Mostly Clear | 1 to 5 mph NW | 0% |
| Wednesday | 51°F | Mostly Sunny | 5 to 12 mph NW | 0% |
| Wednesday Night | 23°F | Partly Cloudy | 1 to 9 mph NW | 0% |
| Thursday | 48°F | Mostly Sunny | 1 to 5 mph NE | 0% |
| Thursday Night | 22°F | Partly Cloudy | 5 mph S | 0% |
| Friday | 54°F | Mostly Sunny | 3 to 7 mph W | 0% |
| Friday Night | 29°F | Mostly Clear | 3 to 8 mph SW | 2% |
| Saturday | 57°F | Mostly Sunny | 9 to 20 mph W | 2% |
| Saturday Night | 28°F | Mostly Clear | 2 to 10 mph W | 0% |
| Sunday | 62°F | Sunny | 2 to 10 mph SW | 0% |
| Sunday Night | 37°F | Mostly Clear | 9 to 16 mph SW | 0% |
| Monday | 58°F | Sunny | 10 to 17 mph NW | 0% |
| Monday Night | 29°F | Partly Cloudy | 2 to 8 mph W | 0% |
| Tuesday | 58°F | Mostly Sunny | 3 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Glen Ullin, ND
Last spring frost
May 19
First fall frost
Sep 21
Growing season
123 days
Hardiness zone
4a
Explore more for Glen Ullin, ND: full frost dates · planting calendar · North Dakota frost dates
Climate data from the nearest NOAA station, Hebron, Nd (12.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.