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Alta, Montana Weather Forecast
Alta, Montana Weather
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Weather Forecast for Alta, Montana : Ravalli County
Issued: 1:01 pm MST Dec 17, 2025 Latitude: 45.6188062 Longitude: -114.299808 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Cloudy on Tonight 100% chance of snow on Thursday 100% chance of rain & snow on Friday 50% chance of snow on Saturday 20% chance of rain & snow on Sunday Rain and Snow on Monday 20% chance of snow on Tuesday Rain and Snow on Wednesday
Low: 22°F High: 40°F High: 41°F High: 32°F High: 40°F High: 41°F High: 39°F High: 41°F
Low: 32°F Low: 17°F Low: 17°F Low: 30°F Low: 23°F Low: 26°F  
Mostly Cloudy Snow Rain & Snow Snow Rain & Snow Rain and Snow Snow Rain and Snow
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Current Conditions at
SALMON - (KSMN)
32°
Mostly Cloudy
as of 8:56 PM MST
Rel. Humidity: 63%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
7 MPH
340° North
Cloud Level(s): Broken at 7000ft, Broken at 8000ft
Current Conditions at
CHALLIS - (KLLJ)
30°
Cloudy
as of 8:55 PM MST
Rel. Humidity: 39%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
6 MPH
280° West
Cloud Level(s): Solid Overcast at 7500ft
Current Conditions at
DILLON - (KDLN)
30°
Feels like 17°F
Clear
as of 8:53 PM MST
Rel. Humidity: 39%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: VFR
Wind Data
22 MPH
Gust: 35 MPH
260° West
Cloud Level(s): Clear
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 22. West northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 24 mph.
100% chance of snow Thursday Thursday... Snow, mainly after 9am. High near 40. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
100% chance of rain & snow Thursday Night Thursday Night... Rain and snow before 11pm, then rain between 11pm and 2am, then rain and snow after 2am. Low around 32. South wind around 9 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
100% chance of rain & snow Friday Friday... Rain and snow, becoming all snow after 11am. The snow could be heavy at times. High near 41. West wind 7 to 9 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
70% chance of snow Friday Night Friday Night... Snow likely, mainly before 11pm. Mostly cloudy, with a low around 17. West wind 5 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
50% chance of snow Saturday Saturday... A 50 percent chance of snow. Partly sunny, with a high near 32. New snow accumulation of less than a half inch possible.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 17.
20% chance of rain & snow Sunday Sunday... A chance of snow before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 40.
20% chance of rain & snow Sunday Night Sunday Night... A chance of rain before 11pm, then rain and snow likely. Mostly cloudy, with a low around 30.
Rain and Snow on Monday Monday... Rain and snow. Mostly cloudy, with a high near 41.
20% chance of rain & snow Monday Night Monday Night... A chance of rain and snow. Mostly cloudy, with a low around 23.
20% chance of snow Tuesday Tuesday... A chance of snow. Partly sunny, with a high near 39.
20% chance of snow Tuesday Night Tuesday Night... A chance of snow. Mostly cloudy, with a low around 26.
Rain and Snow on Wednesday Wednesday... Rain and snow likely. Partly sunny, with a high near 41.
Current Radar Image


Sun Almanac for Alta, Montana
Sunrise: 08:13 AM
Sunset: 4:55 PM
Civil Sunrise:07:39 AM
Civil Sunset: 5:29 PM
Nautical Sunrise: 07:01 AM
Nautical Sunset: 6:07 PM
Astro Sunrise: 06:25 AM
Astro Sunset: 6:43 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.