Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

Sidney-Richland (KSDY)

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

Partly Cloudy

77°F

25°C

Humidity 61%
Wind Speed E 5 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 16 Aug 08:05 PM MDT
Extended Forecast for

Sidney MT

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 5am. Some of the storms could produce heavy rainfall.  Cloudy, with a low around 62. Southeast wind 13 to 18 mph becoming light east  after midnight. Winds could gust as high as 29 mph.

    Low: 62 °F

    Heavy Rain

  • Sunday

    Sunday: A 20 percent chance of showers before 8am.  Mostly cloudy, then gradually becoming sunny, with a high near 86. East wind around 5 mph becoming calm.

    High: 86 °F

    Slight Chance
    Showers then
    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after midnight.  Partly cloudy, with a low around 61. Northeast wind around 5 mph becoming calm  in the evening.

    Low: 61 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers before noon.  Mostly sunny, with a high near 87. Calm wind becoming south southeast around 6 mph in the afternoon.

    High: 87 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. East southeast wind 3 to 6 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. South southeast wind around 7 mph.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. South southeast wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after midnight.  Partly cloudy, with a low around 66. South southeast wind 6 to 10 mph becoming northwest after midnight.

    Low: 66 °F

    Mostly Clear
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly after 5am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 62. Southeast wind 13 to 18 mph becoming light east after midnight. Winds could gust as high as 29 mph.
Sunday
A 20 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 86. East wind around 5 mph becoming calm.
Sunday Night
A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 61. Northeast wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of showers before noon. Mostly sunny, with a high near 87. Calm wind becoming south southeast around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 63. East southeast wind 3 to 6 mph.
Tuesday
Sunny, with a high near 95. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 67. South southeast wind around 7 mph.
Wednesday
Sunny and hot, with a high near 97. South southeast wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 66. South southeast wind 6 to 10 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 85. North northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Thursday Night
A 20 percent chance of showers. Mostly clear, with a low around 56. North wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Sidney MT
 47.69°N 104.15°W (Elev. 1949 ft)
7:02 pm MDT Aug 16, 2025
8pm MDT Aug 16, 2025-6pm MDT Aug 23, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database