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

Sioux Pass MT-16 MP 21 (MTSOO)

Lat: 47.91973°NLon: 104.32619°WElev: 2480.0ft.

unknown precip

52°F

11°C

Humidity 99%
Wind Speed E 8 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 20 Sep 06:30 AM MDT
Extended Forecast for

16 Miles NNE Lambert MT

  • Today

    Today: Showers, mainly before 8am. High near 60. East southeast wind 11 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    High: 60 °F

    Showers then
    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. Southeast wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 45 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 70. South southeast wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47. Southeast wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74. South southeast wind 14 to 18 mph, with gusts as high as 30 mph.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. South southeast wind 13 to 20 mph, with gusts as high as 30 mph.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77. South southeast wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 77 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. Southeast wind 5 to 7 mph.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 81. Light south southwest wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.

    High: 81 °F

    Sunny

Detailed Forecast

Today
Showers, mainly before 8am. High near 60. East southeast wind 11 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Tonight
Mostly cloudy, with a low around 45. Southeast wind 6 to 10 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 70. South southeast wind 7 to 13 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 47. Southeast wind 11 to 13 mph, with gusts as high as 23 mph.
Tuesday
Sunny, with a high near 74. South southeast wind 14 to 18 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 50. South southeast wind 13 to 20 mph, with gusts as high as 30 mph.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77. South southeast wind 8 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 52. Southeast wind 5 to 7 mph.
Thursday
Sunny, with a high near 81. Light south southwest wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 53. North wind 6 to 8 mph becoming south southeast after midnight.
Friday
Sunny, with a high near 83. South southeast wind 10 to 18 mph, with gusts as high as 31 mph.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles NNE Lambert MT
 47.89°N 104.42°W (Elev. 2398 ft)
Last Update:
4:01 am MDT Sep 20, 2026
Forecast Valid:
6am MDT Sep 20, 2026-6pm MDT Sep 26, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation