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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

ROCKY BOY (ROCM8)

Lat: 48.17478°NLon: 109.64728°WElev: 4700.0ft.

NA

60°F

16°C

Humidity NA
Wind Speed NA NA MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update NA
Extended Forecast for

9 Miles NNW Iliad MT

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Cloudy early, then gradual clearing, with a low around 59. South southeast wind 3 to 6 mph.

    Low: 59 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 5pm. Sunny, with a high near 88. South southwest wind 3 to 6 mph.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. North wind 5 to 7 mph becoming east in the evening.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63. East northeast wind around 6 mph.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 93. Northwest wind 5 to 9 mph.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 59. North wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 81. Northwest wind around 8 mph.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Cloudy early, then gradual clearing, with a low around 59. South southeast wind 3 to 6 mph.
Monday
A 20 percent chance of showers and thunderstorms after 5pm. Sunny, with a high near 88. South southwest wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 63. North wind 5 to 7 mph becoming east in the evening.
Tuesday
Sunny, with a high near 95. Calm wind becoming west southwest around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 63. East northeast wind around 6 mph.
Wednesday
Sunny, with a high near 93. Northwest wind 5 to 9 mph.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 59. North wind 6 to 8 mph. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 81. Northwest wind around 8 mph.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles NNW Iliad MT
 47.9°N 109.87°W (Elev. 3041 ft)
Last Update:
8:43 pm MDT Aug 17, 2025
Forecast Valid:
9pm MDT Aug 17, 2025-6pm MDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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