Ulm, MT Weather & Growing Conditions
This Afternoon
56°F
Mostly Sunny
Mostly sunny. High near 56, with temperatures falling to around 49 in the afternoon. South southwest wind 3 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Mostly Sunny | 3 to 7 mph SSW | 0% |
| Tonight | 28°F | Mostly Cloudy | 3 mph SW | 0% |
| Wednesday | 50°F | Mostly Sunny | 1 mph WSW | 0% |
| Wednesday Night | 29°F | Mostly Clear | 1 to 7 mph S | 0% |
| Thursday | 56°F | Mostly Sunny | 7 to 18 mph SW | 0% |
| Thursday Night | 33°F | Mostly Clear | 15 mph SW | 0% |
| Friday | 54°F | Mostly Sunny | 13 to 28 mph SW | 1% |
| Friday Night | 37°F | Partly Cloudy | 16 to 25 mph SW | 2% |
| Saturday | 56°F | Mostly Sunny | 8 to 18 mph SW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 8 to 12 mph SSW | 0% |
| Sunday | 61°F | Mostly Sunny | 12 to 18 mph SSW | 0% |
| Sunday Night | 37°F | Mostly Cloudy | 6 to 12 mph SW | 1% |
| Monday | 57°F | Partly Sunny | 6 mph SW | 2% |
| Monday Night | 37°F | Mostly Cloudy | 6 to 9 mph SSW | 2% |
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 Nov 4, 2026.