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 >

Hazardous Weather Conditions

Current conditions at

GALENA (GAAM8)

Lat: 46.221°NLon: 112.22853°WElev: 6545.0ft.

NA

47°F

8°C

Humidity 99%
Wind Speed WSW 0 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 19 Sep 01:47 AM MDT
Extended Forecast for

Boulder MT

Flash Flood Watch until September 20, 12:00am
Click here for hazard details and duration
Flash Flood Watch
  •  
    Flash Flood Watch until September 20, 12:00am

    NOW until 12:00am Sun

    Flash Flood Watch

  • Overnight

    Low: 49 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. High near 56. North wind 5 to 7 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 56 °F

    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 44. Northeast wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 68. Calm wind becoming east around 5 mph in the afternoon.

    High: 68 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44. East wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 73. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. West wind around 6 mph becoming calm in the evening.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 74 °F

    Sunny

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 49. North wind 3 to 5 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. High near 56. North wind 5 to 7 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
A 30 percent chance of rain, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 44. Northeast wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 68. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 44. East wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 73. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 46. West wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 74. Calm wind becoming south southwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 47.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 49.
Friday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Boulder MT
 46.24°N 112.1°W (Elev. 4898 ft)
Last Update:
12:31 am MDT Sep 19, 2026
Forecast Valid:
2am MDT Sep 19, 2026-6pm MDT Sep 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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