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Ismay, Montana Weather Forecast
Ismay, Montana Weather
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Weather Forecast for Ismay, Montana : Custer County
Issued: 4:09 am MST Dec 17, 2025 Latitude: 46.4972276 Longitude: -104.794128 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Thursday Friday Saturday Sunday Monday Tuesday
80% chance of rain & snow on Today 50% chance of snow on Tonight Mostly Sunny on Thursday Mostly Cloudy on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday Mostly Cloudy on Monday Partly Sunny on Tuesday
High: 51°F Low: 8 °F High: 31°F High: 48°F High: 32°F High: 38°F High: 43°F High: 38°F
Low: 34 °F Low: 16°F Low: 19°F Low: 23°F Low: 22°F  
Rain & Snow Snow Mostly Sunny Mostly Cloudy Mostly Sunny Mostly Sunny Mostly Cloudy Partly Sunny
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Current Conditions at
BAKER - (KBHK)
39°
Feels like 32°F
Clear
as of 4:51 AM MST
Rel. Humidity: 69%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.56 in.
Flight Rule: VFR
Wind Data
10 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
GLENDIVE - (KGDV)
34°
Clear
as of 4:56 AM MST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.51 in.
Flight Rule: VFR
Wind Data
8 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
MILES CITY - (KMLS)
36°
Feels like 27°F
Clear
as of 4:53 AM MST
Rel. Humidity: 80%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.49 in.
Flight Rule: VFR
Wind Data
12 MPH
150° Southeast
Cloud Level(s): Clear
80% chance of rain & snow Today Today... Rain showers, possibly mixing with snow after 2pm, then gradually ending. High near 51. South wind 14 to 19 mph becoming west 23 to 28 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than a half inch possible.

50% chance of snow Tonight Tonight... A 50 percent chance of snow showers, mainly between 8pm and 4am. Increasing clouds, with a low around 8. Wind chill values as low as -10. Northwest wind 39 to 44 mph decreasing to 29 to 34 mph after midnight. Winds could gust as high as 60 mph. New snow accumulation of less than a half inch possible.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 31. Wind chill values as low as -10. Northwest wind 15 to 20 mph becoming west 6 to 11 mph in the afternoon.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a temperature rising to around 34 by 5am. South southeast wind 7 to 13 mph.

Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 48. South wind around 14 mph becoming west in the afternoon.

50% chance of snow Friday Night Friday Night... A 50 percent chance of snow. Cloudy, then gradually becoming partly cloudy, with a low around 16. West northwest wind 5 to 8 mph. New snow accumulation of less than a half inch possible.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 32. West wind 3 to 6 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 19. Southwest wind around 6 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 38. South wind around 7 mph.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 23. South southeast wind around 6 mph.

Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 43. South wind 6 to 8 mph becoming west southwest in the afternoon.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 22. West wind 3 to 7 mph.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 38. Light and variable wind becoming south southeast 5 to 7 mph in the afternoon.

Sun Almanac for Ismay, Montana
Sunrise: 07:38 AM
Sunset: 4:13 PM
Civil Sunrise:07:03 AM
Civil Sunset: 4:48 PM
Nautical Sunrise: 06:25 AM
Nautical Sunset: 5:26 PM
Astro Sunrise: 05:48 AM
Astro Sunset: 6:03 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.