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Sieben, Montana Weather Forecast
Sieben, Montana Weather
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Weather Forecast for Sieben, Montana : Lewis and Clark County
Issued: 9:27 pm MST Dec 16, 2025 Latitude: 46.8985517 Longitude: -112.1272282 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
50% chance of rain on Overnight 90% chance of rain & snow on Wednesday 40% chance of snow on Thursday 80% chance of rain & snow on Friday 20% chance of snow on Saturday 20% chance of snow on Sunday 20% chance of rain & snow on Monday 20% chance of rain & snow on Tuesday
Low: 47°F High: 32 °F High: 42°F High: 45°F High: 38°F High: 39°F High: 43°F High: 44°F
Low: 28°F Low: 34°F Low: 26°F Low: 23°F Low: 27°F Low: 27°F  
Rain Rain & Snow Snow Rain & Snow Snow Snow Rain & Snow Rain & Snow
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Current Conditions at
HELENA - (KHLN)
48°
Clear
as of 1:53 AM MST
Rel. Humidity: 34%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 29.56 in.
Flight Rule: VFR
Wind Data
8 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
GREAT FALLS - (KGTF)
46°
Feels like 39°F
Clear
as of 1:53 AM MST
Rel. Humidity: 42%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 29.45 in.
Flight Rule: VFR
Wind Data
17 MPH
210° Southwest
Cloud Level(s): Clear
50% chance of rain Overnight Overnight... A 50 percent chance of rain. Mostly cloudy, with a steady temperature around 47. Breezy, with a south wind 23 to 25 mph, with gusts as high as 40 mph.

90% chance of rain & snow Wednesday Wednesday... Rain and snow before noon, then a slight chance of snow after 1pm. Patchy blowing dust after 9am. Temperature falling to around 32 by 5pm. Windy, with a south southwest wind 31 to 38 mph becoming west in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Dust on Wednesday Night Wednesday Night... Patchy blowing dust before 8pm. Partly cloudy, with a low around 28. Windy, with a west wind 27 to 32 mph decreasing to 20 to 25 mph after midnight. Winds could gust as high as 50 mph.

40% chance of snow Thursday Thursday... A 40 percent chance of snow, mainly between 11am and 5pm. Mostly cloudy, with a high near 42. South wind 9 to 15 mph, with gusts as high as 24 mph. Little or no snow accumulation expected.

80% chance of rain & snow Thursday Night Thursday Night... Rain likely, possibly mixed with snow before 8pm, then rain. Low around 34. South southwest wind 15 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

80% chance of rain & snow Friday Friday... Rain, possibly mixed with snow, becoming all snow after 11am. High near 45. West southwest wind 17 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

60% chance of snow Friday Night Friday Night... Snow likely, mainly before 11pm. Mostly cloudy, with a low around 26. West wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

20% chance of snow Saturday Saturday... A chance of snow. Partly sunny, with a high near 38. West southwest wind 10 to 16 mph, with gusts as high as 26 mph.

10% chance of snow Saturday Night Saturday Night... A slight chance of snow. Partly cloudy, with a low around 23.

20% chance of snow Sunday Sunday... A chance of snow, mainly after 5pm. Mostly sunny, with a high near 39.

20% chance of rain & snow Sunday Night Sunday Night... A chance of rain and snow. Mostly cloudy, with a low around 27.

20% chance of rain & snow Monday Monday... A chance of rain and snow. Partly sunny, with a high near 43.

20% chance of rain & snow Monday Night Monday Night... A chance of rain and snow. Mostly cloudy, with a low around 27.

20% chance of rain & snow Tuesday Tuesday... A chance of rain and snow. Partly sunny, with a high near 44.

Sun Almanac for Sieben, Montana
Sunrise: 08:09 AM
Sunset: 4:41 PM
Civil Sunrise:07:34 AM
Civil Sunset: 5:16 PM
Nautical Sunrise: 06:55 AM
Nautical Sunset: 5:55 PM
Astro Sunrise: 06:18 AM
Astro Sunset: 6:32 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.