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The Regional Temperatures and Precipitation Product for the State of Montana (RTPMT) will be discontinued on May 6, 2026.

Current conditions at

BOULDER MOUNTAIN (BOMM8)

Lat: 46.5596° N Lon: 111.28973° W Elev: 7950.0 ft.

28°F

-2°C

Humidity	NA
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	NA
Visibility	NA
Last update	NA

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Detailed forecast for

Big Belt, Bridger and Castle Mountains

Rest Of Today

Breezy. Partly sunny. Chance of rain and slight chance of snow late in the afternoon. Highs 43 to 51. West winds 15 to 25 mph with gusts to around 60 mph. Chance of precipitation 40 percent.

Tonight

Mostly cloudy. A 20 percent chance of rain and snow in the evening. Lows in the lower 30s. West winds 5 to 15 mph. Gusts up to 50 mph decreasing to 40 mph after midnight.

Tuesday

Breezy. Mostly sunny. Highs 46 to 56. West winds 10 to 15 mph increasing to 15 to 25 mph in the afternoon. Gusts up to 55 mph.

Tuesday Night

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 30s. Southwest winds 5 to 20 mph. Gusts up to 55 mph decreasing to 40 mph after midnight.

Wednesday

Windy. Mostly cloudy. Rain and snow likely in the afternoon. Snow level 6100 feet. Highs 46 to 54. Southwest winds 10 to 15 mph with gusts to around 50 mph increasing to 15 to 30 mph with gusts to around 60 mph in the afternoon. Chance of precipitation 70 percent.

Wednesday Night

Rain showers, snow and slight chance of thunderstorms in the evening, then snow after midnight. Heavy snow accumulations. Lows in the upper 20s. Chance of precipitation near 100 percent.

Thursday

Colder, snow. Heavy snow accumulations. Highs 29 to 37. Chance of snow near 100 percent.

Thursday Night

Mostly cloudy with a 50 percent chance of snow. Lows around 20.

Friday

Partly sunny. Chance of snow in the morning, then snow likely in the afternoon. Light snow accumulations. Highs 32 to 40. Chance of snow 70 percent.

Friday Night

Mostly cloudy with a 40 percent chance of snow in the evening, then partly cloudy after midnight. Lows in the lower 20s.

Saturday

Not as cool. Sunny. Highs 41 to 49.

Saturday Night And Sunday

Partly cloudy. Lows around 30. Highs 50 to 58.