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Pompeys Pillar, Montana Weather Forecast
Pompeys Pillar, Montana Weather
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Click for High Wind Warning for Pompeys Pillar, Montana
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Weather Forecast for Pompeys Pillar, Montana : Yellowstone County
Issued: 10:09 pm MST Dec 16, 2025 Latitude: 45.9913611 Longitude: -107.9520501 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Mostly Cloudy on Overnight 60% chance of rain on Wednesday Increasing Clouds on Thursday 60% chance of rain on Friday 30% chance of snow on Saturday Partly Sunny on Sunday 20% chance of rain & snow on Monday Partly Sunny on Tuesday
Low: 37°F High: 47 °F High: 40°F High: 52°F High: 39°F High: 38°F High: 45°F High: 43°F
Low: 23°F Low: 33 °F Low: 24°F Low: 22°F Low: 24°F Low: 28°F  
Mostly Cloudy Rain Increasing Clouds Rain Snow Partly Sunny Rain & Snow Partly Sunny
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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
SHERIDAN - (KSHR)
39°
Clear
as of 11:53 PM MST
Rel. Humidity: 69%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.81 in.
Flight Rule: VFR
Wind Data
8 MPH
230° Southwest
Cloud Level(s): Clear
Current Conditions at
SOUTH BIG HORN - (KGEY)
39°
Clear
as of 11:53 PM MST
Rel. Humidity: 64%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
8 MPH
120° Southeast
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 steady temperature around 37. South southwest wind 6 to 9 mph.
60% chance of rain Wednesday Wednesday... Showers likely, mainly between 11am and 2pm. Mostly cloudy, then gradually becoming sunny, with a temperature rising to near 47 by 10am, then falling to around 37 during the remainder of the day. West wind 13 to 23 mph increasing to 30 to 40 mph. Winds could gust as high as 55 mph. Chance of precipitation is 60%.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 23. West northwest wind 31 to 41 mph decreasing to 9 to 19 mph. Winds could gust as high as 55 mph.
Increasing Clouds on Thursday Thursday... Increasing clouds, with a high near 40. West northwest wind around 6 mph becoming light and variable.
Cloudy on Thursday Night Thursday Night... Cloudy, with a temperature falling to near 33 by 9pm, then rising to around 42 during the remainder of the night. Southwest wind 6 to 8 mph.
60% chance of rain Friday Friday... Showers likely, mainly after 5pm. Mostly cloudy, with a high near 52. West southwest wind 10 to 13 mph becoming northwest in the afternoon. Chance of precipitation is 60%.
60% chance of rain & snow Friday Night Friday Night... Rain and snow showers likely, becoming all snow after 8pm. Mostly cloudy, with a low around 24. West northwest wind 6 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
30% chance of snow Saturday Saturday... A 30 percent chance of snow showers, mainly before 11am. Mostly sunny, with a high near 39. West wind around 6 mph.
20% chance of snow Saturday Night Saturday Night... A 20 percent chance of snow showers before 11pm. Partly cloudy, with a low around 22. West southwest wind around 5 mph becoming calm in the evening.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 38. Light and variable wind.
20% chance of rain Sunday Night Sunday Night... A 20 percent chance of showers. Mostly cloudy, with a low around 24. Light and variable wind.
20% chance of rain & snow Monday Monday... A slight chance of rain and snow showers. Mostly cloudy, with a high near 45. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 28. Light and variable wind.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 43. Light and variable wind.
Current Radar Image


Sun Almanac for Pompeys Pillar, Montana
Sunrise: 07:49 AM
Sunset: 4:28 PM
Civil Sunrise:07:14 AM
Civil Sunset: 5:02 PM
Nautical Sunrise: 06:36 AM
Nautical Sunset: 5:40 PM
Astro Sunrise: 06:00 AM
Astro Sunset: 6:17 PM
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