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Sourdough, Montana Weather Forecast
Sourdough, Montana Weather
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Weather Forecast for Sourdough, Montana : Sweet Grass County
Issued: 10:09 pm MST Dec 16, 2025 Latitude: 45.901887 Longitude: -109.8143513 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Mostly Cloudy on Overnight 40% chance of rain & snow on Wednesday Mostly Cloudy on Thursday 50% chance of rain & snow on Friday 20% chance of snow on Saturday Partly Sunny on Sunday 30% chance of rain & snow on Monday Mostly Cloudy on Tuesday
Low: 41°F High: 48 °F High: 41°F High: 49 °F High: 37°F High: 38°F High: 46°F High: 44°F
Low: 27°F Low: 44 °F Low: 26°F Low: 22°F Low: 33°F Low: 31°F  
Mostly Cloudy Rain & Snow Mostly Cloudy Rain & Snow Snow Partly Sunny Rain & Snow Mostly Cloudy
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Current Conditions at
LIVINGSTON - (KLVM)
48°
Feels like 38°F
Clear
as of 11:53 PM MST
Rel. Humidity: 42%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 29.73 in.
Flight Rule: VFR
Wind Data
36 MPH
Gust: 47 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
BILLINGS - (KBIL)
46°
Feels like 41°F
Cloudy
as of 11:53 PM MST
Rel. Humidity: 49%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.74 in.
Flight Rule: VFR
Wind Data
12 MPH
240° Southwest
Cloud Level(s): Broken at 14000ft, Solid Overcast at 17000ft
Current Conditions at
BOZEMAN - (KBZN)
46°
Clear
as of 11:56 PM MST
Rel. Humidity: 36%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 29.76 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
LEWISTOWN - (KLWT)
46°
Feels like 41°F
Cloudy
as of 11:54 PM MST
Rel. Humidity: 45%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 29.67 in.
Flight Rule: VFR
Wind Data
12 MPH
240° Southwest
Cloud Level(s): Solid Overcast at 11000ft
Mostly Cloudy on Overnight Overnight... Mostly cloudy, with a low around 41. West southwest wind 26 to 30 mph, with gusts as high as 43 mph.
40% chance of rain & snow Wednesday Wednesday... A chance of rain showers, mixing with snow after 11am, then gradually ending. Mostly cloudy, then gradually becoming sunny, with a temperature rising to near 48 by 10am, then falling to around 32 during the remainder of the day. West wind 41 to 46 mph increasing to 50 to 55 mph in the morning. Winds could gust as high as 75 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 27. West wind 34 to 44 mph decreasing to 18 to 28 mph. Winds could gust as high as 60 mph.
Mostly Cloudy on Thursday Thursday... Mostly cloudy, with a high near 41. Southwest wind 13 to 16 mph.
20% chance of rain & snow Thursday Night Thursday Night... A slight chance of snow showers before 8pm, then a slight chance of rain and snow showers between 8pm and 11pm, then a slight chance of rain showers after 11pm. Mostly cloudy, with a temperature rising to around 44 by 4am. West southwest wind 14 to 19 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 20%.
50% chance of rain & snow Friday Friday... A chance of rain showers before 11am, then a chance of rain and snow showers. Mostly cloudy, with a temperature rising to near 49 by 11am, then falling to around 42 during the remainder of the day. West wind 24 to 26 mph, with gusts as high as 40 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
60% chance of snow Friday Night Friday Night... Snow showers likely, mainly before 11pm. Mostly cloudy, with a low around 26. West wind 13 to 16 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
20% chance of snow Saturday Saturday... A 20 percent chance of snow showers. Mostly sunny, with a high near 37. West wind 10 to 14 mph.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 22. Southwest wind around 8 mph.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 38. South southwest wind around 7 mph.
20% chance of rain & snow Sunday Night Sunday Night... A slight chance of rain and snow showers. Mostly cloudy, with a steady temperature around 33. Southwest wind around 7 mph. Chance of precipitation is 20%.
30% chance of rain & snow Monday Monday... A chance of rain and snow showers. Mostly cloudy, with a high near 46. Southwest wind 9 to 11 mph. Chance of precipitation is 30%.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 31. West southwest wind around 9 mph.
Mostly Cloudy on Tuesday Tuesday... Mostly cloudy, with a high near 44. Southwest wind around 9 mph.
Current Radar Image


Sun Almanac for Sourdough, Montana
Sunrise: 07:56 AM
Sunset: 4:35 PM
Civil Sunrise:07:21 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 06:43 AM
Nautical Sunset: 5:48 PM
Astro Sunrise: 06:07 AM
Astro Sunset: 6:24 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.