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Roundup, Montana Weather Forecast
Roundup, Montana Weather
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Weather Forecast for Roundup, Montana : Musselshell County
Issued: 2:54 am MST Dec 17, 2025 Latitude: 46.445242 Longitude: -108.5417999 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Cloudy on Overnight 50% chance of rain & snow on Wednesday Increasing Clouds on Thursday 50% chance of rain & snow on Friday 20% chance of snow on Saturday Partly Sunny on Sunday 20% chance of rain & snow on Monday 20% chance of rain & snow on Tuesday
Low: 36°F High: 52 °F High: 41°F High: 53 °F High: 40°F High: 41°F High: 43°F High: 41°F
Low: 22°F Low: 33 °F Low: 20°F Low: 20°F Low: 24°F Low: 23°F  
Cloudy Rain & Snow Increasing Clouds Rain & Snow Snow Partly Sunny Rain & Snow Rain & Snow
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Current Conditions at
BILLINGS - (KBIL)
46°
Feels like 41°F
Mostly Clear
as of 2:53 AM MST
Rel. Humidity: 45%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 29.61 in.
Flight Rule: VFR
Wind Data
10 MPH
240° Southwest
Cloud Level(s): Few at 24000ft
Current Conditions at
LEWISTOWN - (KLWT)
48°
Feels like 40°F
Clear
as of 2:54 AM MST
Rel. Humidity: 34%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 29.51 in.
Flight Rule: VFR
Wind Data
23 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
JORDAN - (KJDN)
37°
Clear
as of 2:48 AM MST
Rel. Humidity: 74%
Dew Point: 30°F
Pressure: 29.54 in.
Wind Data
5 MPH
210° Southwest
Current Conditions at
LIVINGSTON - (KLVM)
48°
Feels like 38°F
Clear
as of 2:53 AM MST
Rel. Humidity: 39%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 29.54 in.
Flight Rule: VFR
Wind Data
43 MPH
Gust: 59 MPH
220° Southwest
Cloud Level(s): Clear
Cloudy on Overnight Overnight... Cloudy, with a low around 36. South southwest wind around 14 mph.

50% chance of rain & snow Wednesday Wednesday... A chance of rain showers, mixing with snow after 11am, then gradually ending. Cloudy through mid morning, then gradual clearing, with a temperature rising to near 52 by 10am, then falling to around 38 during the remainder of the day. West wind 17 to 27 mph increasing to 34 to 44 mph. Winds could gust as high as 60 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 22. West northwest wind 29 to 39 mph decreasing to 18 to 28 mph after midnight. Winds could gust as high as 55 mph.

Increasing Clouds on Thursday Thursday... Increasing clouds, with a high near 41. Southwest wind 7 to 10 mph.

Cloudy on Thursday Night Thursday Night... Cloudy, with a temperature falling to near 33 by 10pm, then rising to around 43 during the remainder of the night. Southwest wind 8 to 13 mph increasing to 15 to 20 mph after midnight.

50% chance of rain & snow Friday Friday... A chance of rain and snow after 11am. Mostly cloudy, with a temperature rising to near 53 by noon, then falling to around 39 during the remainder of the day. West northwest wind 11 to 20 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 likely, mainly before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 20. West wind around 7 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

20% chance of snow Saturday Saturday... A 20 percent chance of snow before 11am. Mostly sunny, with a high near 40. West wind 6 to 10 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 20. Southwest wind around 7 mph.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 41. Southwest wind around 6 mph.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 24. Calm wind becoming southwest around 5 mph after midnight.

20% chance of rain & snow Monday Monday... A slight chance of rain and snow. Mostly cloudy, with a high near 43. West wind 6 to 8 mph. Chance of precipitation is 20%.

20% chance of rain & snow Monday Night Monday Night... A slight chance of rain and snow. Mostly cloudy, with a low around 23. West wind around 6 mph. Chance of precipitation is 20%.

20% chance of rain & snow Tuesday Tuesday... A slight chance of rain and snow. Partly sunny, with a high near 41. West southwest wind around 5 mph. Chance of precipitation is 20%.

Current Radar Image


Sun Almanac for Roundup, Montana
Sunrise: 07:53 AM
Sunset: 4:28 PM
Civil Sunrise:07:18 AM
Civil Sunset: 5:03 PM
Nautical Sunrise: 06:39 AM
Nautical Sunset: 5:42 PM
Astro Sunrise: 06:03 AM
Astro Sunset: 6:18 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.