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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Sidney-Richland (KSDY)

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

Mostly Cloudy

66°F

19°C

Humidity 72%
Wind Speed S 6 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 18 Sep 10:00 PM MDT
Extended Forecast for

Lambert MT

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 54. Northeast wind 5 to 7 mph.

    Low: 54 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely, mainly after 4pm. Cloudy, with a high near 65. East northeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly after 11pm. Cloudy, with a low around 49. East wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely. Cloudy, with a high near 62. East wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    High: 62 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 46. East southeast wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 70. South southeast wind 5 to 14 mph, with gusts as high as 23 mph.

    High: 70 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 48. Southeast wind 10 to 15 mph, with gusts as high as 23 mph.

    Low: 48 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. South southeast wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 51. Southeast wind 6 to 13 mph, with gusts as high as 22 mph.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 54. Northeast wind 5 to 7 mph.
Saturday
Showers likely, mainly after 4pm. Cloudy, with a high near 65. East northeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Saturday Night
Showers likely, mainly after 11pm. Cloudy, with a low around 49. East wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Sunday
Showers likely. Cloudy, with a high near 62. East wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Sunday Night
Mostly cloudy, with a low around 46. East southeast wind 6 to 11 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 70. South southeast wind 5 to 14 mph, with gusts as high as 23 mph.
Monday Night
Partly cloudy, with a low around 48. Southeast wind 10 to 15 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 76. South southeast wind 10 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Partly cloudy, with a low around 51. Southeast wind 6 to 13 mph, with gusts as high as 22 mph.
Wednesday
Sunny, with a high near 79. South southeast wind 5 to 8 mph.
Wednesday Night
Mostly clear, with a low around 52. South wind 3 to 6 mph.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 54.
Friday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lambert MT
 47.69°N 104.62°W (Elev. 2451 ft)
Last Update:
3:56 pm MDT Sep 18, 2026
Forecast Valid:
10pm MDT Sep 18, 2026-6pm MDT Sep 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation