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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

HARLEM (HRLM)

Lat: 48.54333°NLon: 108.83472°WElev: 2358.0ft.

NA

79°F

26°C

Humidity 46%
Wind Speed ENE 2 MPH
Barometer NA
Dewpoint 57°F (14°C)
Visibility NA
Heat Index80°F (27°C)
Last update 17 Aug 07:00 PM MDT
Extended Forecast for

Chinook MT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 58. Light and variable wind.

    Low: 58 °F

    Decreasing
    Clouds

  • Monday

    Monday: A 20 percent chance of showers after 5pm. Sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 88 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. Southeast wind 3 to 6 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61. East wind around 6 mph.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 93. Light north northwest wind becoming northwest 5 to 9 mph in the morning.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57. West southwest wind 7 to 9 mph.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 79. West northwest wind 7 to 9 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 58. Light and variable wind.
Monday
A 20 percent chance of showers after 5pm. Sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 60. Southeast wind 3 to 6 mph.
Tuesday
Sunny, with a high near 93. Calm wind becoming southeast around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 61. East wind around 6 mph.
Wednesday
Sunny, with a high near 93. Light north northwest wind becoming northwest 5 to 9 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 57. West southwest wind 7 to 9 mph.
Thursday
Sunny, with a high near 79. West northwest wind 7 to 9 mph.
Thursday Night
Mostly clear, with a low around 51.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 49.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 50.
Sunday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chinook MT
 48.6°N 109.23°W (Elev. 2408 ft)
Last Update:
4:44 pm MDT Aug 17, 2025
Forecast Valid:
8pm MDT Aug 17, 2025-6pm MDT Aug 24, 2025
 
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