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

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Sidney-Richland (KSDY)

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

Mostly Cloudy

57°F

14°C

Humidity 82%
Wind Speed WNW 21 MPH
Barometer 29.57 in (1001.36 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 17 Jun 07:05 AM MDT
Extended Forecast for

Sidney MT

  • Today

    Today: Showers and thunderstorms, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. High near 67. Northwest wind 15 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.

    High: 67 °F

    Showers

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly between 8pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 45. West northwest wind 5 to 14 mph, with gusts as high as 24 mph.

    Low: 45 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 71. West northwest wind 5 to 11 mph, with gusts as high as 21 mph.

    High: 71 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 46. West northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 46 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Juneteenth

    Juneteenth: Sunny, with a high near 73. West northwest wind 5 to 9 mph, with gusts as high as 18 mph.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46. North wind around 6 mph becoming light and variable in the evening.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 76. East southeast wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms, then a chance of showers after midnight. Mostly cloudy, with a low around 51. East southeast wind 9 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    Low: 51 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 71. Southeast wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely

Detailed Forecast

Today
Showers and thunderstorms, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. High near 67. Northwest wind 15 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.
Tonight
A 40 percent chance of showers and thunderstorms, mainly between 8pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 45. West northwest wind 5 to 14 mph, with gusts as high as 24 mph.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 71. West northwest wind 5 to 11 mph, with gusts as high as 21 mph.
Thursday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 46. West northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Juneteenth
Sunny, with a high near 73. West northwest wind 5 to 9 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 46. North wind around 6 mph becoming light and variable in the evening.
Saturday
Mostly sunny, with a high near 76. East southeast wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph.
Saturday Night
A slight chance of showers and thunderstorms, then a chance of showers after midnight. Mostly cloudy, with a low around 51. East southeast wind 9 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Sunday
Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 71. Southeast wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 47. South southwest wind 8 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 30%.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 70. West wind 8 to 14 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sidney MT
 47.72°N 104.16°W (Elev. 1962 ft)
Last Update:
4:41 am MDT Jun 17, 2026
Forecast Valid:
7am MDT Jun 17, 2026-6pm MDT Jun 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation