National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding This Week

Hot temperatures and high humidity are forecast to continue across much of east Texas into the mid-Mississippi Valley through this week. Heavy to excessive rainfall occurring at times through Friday could bring areas of flooding across parts of the central Plains into the upper Midwest and Four Corners states. Read More >

Current conditions at

Sidney-Richland (KSDY)

Lat: 47.7°NLon: 104.2°WElev: 1985.0ft.

Overcast

54°F

12°C

Humidity 71%
Wind Speed WNW 16 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 14 Sep 10:35 PM MDT
Extended Forecast for

Sidney MT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Breezy, with a west northwest wind 23 to 28 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 41 mph.

    Low: 45 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 66. West northwest wind 5 to 10 mph becoming light and variable. Winds could gust as high as 18 mph.

    High: 66 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 45. East northeast wind 5 to 9 mph.

    Low: 45 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 71. East wind 8 to 16 mph becoming north in the afternoon. Winds could gust as high as 26 mph.

    High: 71 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 42. North wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.

    Low: 42 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Light east southeast wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 54. East southeast wind 5 to 11 mph, with gusts as high as 21 mph.

    Low: 54 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 75. North northeast wind 5 to 9 mph. Chance of precipitation is 50%.

    High: 75 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Northeast wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Breezy, with a west northwest wind 23 to 28 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 41 mph.
Tuesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 66. West northwest wind 5 to 10 mph becoming light and variable. Winds could gust as high as 18 mph.
Tuesday Night
Increasing clouds, with a low around 45. East northeast wind 5 to 9 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 71. East wind 8 to 16 mph becoming north in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night
Mostly clear, with a low around 42. North wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.
Thursday
Sunny, with a high near 75. Light east southeast wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 54. East southeast wind 5 to 11 mph, with gusts as high as 21 mph.
Friday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 75. North northeast wind 5 to 9 mph. Chance of precipitation is 50%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Northeast wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 70. East northeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 50. East northeast wind 6 to 8 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 47.
Monday
Sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sidney MT
 47.71°N 104.19°W (Elev. 1998 ft)
Last Update:
9:51 pm MDT Sep 14, 2026
Forecast Valid:
10pm MDT Sep 14, 2026-6pm MDT Sep 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation