Glen Ullin, ND Weather & Growing Conditions
Today
65°F
Patchy Fog then Slight Chance Rain Showers
Patchy fog before 1pm, then a slight chance of rain showers. Cloudy, with a high near 65. Northeast wind 2 to 9 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Patchy Fog then Slight Chance Rain Showers | 2 to 9 mph NE | 24% |
| Tonight | 48°F | Rain Showers Likely | 12 mph E | 64% |
| Sunday | 60°F | Rain Showers Likely | 12 mph E | 65% |
| Sunday Night | 45°F | Chance Rain Showers | 2 to 8 mph E | 33% |
| Monday | 68°F | Mostly Sunny | 2 to 12 mph SE | 7% |
| Monday Night | 46°F | Partly Cloudy | 10 mph SE | 1% |
| Tuesday | 70°F | Mostly Sunny | 12 to 22 mph SE | 2% |
| Tuesday Night | 50°F | Mostly Cloudy | 14 to 20 mph SE | 4% |
| Wednesday | 76°F | Partly Sunny | 14 to 17 mph SE | 7% |
| Wednesday Night | 51°F | Partly Cloudy | 5 to 14 mph SE | 13% |
| Thursday | 78°F | Mostly Sunny | 5 to 10 mph SE | 10% |
| Thursday Night | 52°F | Partly Cloudy | 9 mph SE | 10% |
| Friday | 78°F | Mostly Sunny | 8 to 18 mph SE | 5% |
| Friday Night | 53°F | Slight Chance Rain Showers | 18 mph SE | 17% |
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 Sep 19, 2026.