Ulm, MT Weather & Growing Conditions
Today
79°F
Sunny
Sunny, with a high near 79. East wind 1 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Sunny | 1 to 6 mph E | 0% |
| Tonight | 47°F | Mostly Clear | 3 to 8 mph SE | 1% |
| Wednesday | 88°F | Sunny | 5 mph WSW | 0% |
| Wednesday Night | 50°F | Mostly Clear | 3 to 7 mph SW | 0% |
| Thursday | 95°F | Sunny | 3 to 9 mph W | 0% |
| Thursday Night | 55°F | Mostly Clear | 3 to 9 mph N | 0% |
| Friday | 99°F | Sunny | 2 to 18 mph WSW | 0% |
| Friday Night | 56°F | Mostly Clear | 6 to 18 mph W | 0% |
| Saturday | 96°F | Sunny | 3 to 10 mph WSW | 0% |
| Saturday Night | 56°F | Mostly Clear | 3 to 14 mph WNW | 1% |
| Sunday | 91°F | Sunny | 2 to 8 mph NW | 0% |
| Sunday Night | 55°F | Mostly Clear | 5 to 13 mph N | 2% |
| Monday | 89°F | Sunny | 2 to 7 mph NNW | 4% |
| Monday Night | 55°F | Mostly Clear | 6 to 10 mph NNW | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ulm, MT
Last spring frost
Jun 2
First fall frost
Sep 10
Growing season
96 days
Hardiness zone
4a
Explore more for Ulm, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Sun Rvr 4 S, Mt (8.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.