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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

Georgetown Lake (MTGTL)

Lat: 46.191°NLon: 113.3°WElev: 6338.0ft.

NA

58°F

14°C

Humidity 37%
Wind Speed WNW 9 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 17 Jun 08:15 PM MDT
Extended Forecast for

15 Miles S Georgetown MT

  • Tonight

    Tonight: A 30 percent chance of rain between 10pm and midnight. Snow level 9900 feet lowering to 8900 feet after midnight . Mostly cloudy during the early evening, then becoming clear, with a low around 36. West northwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 26 mph.

    Low: 36 °F

    Chance Rain
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny, with a high near 57. West northwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 57 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 39. West northwest wind 7 to 14 mph becoming northeast after midnight. Winds could gust as high as 22 mph.

    Low: 39 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 63. East northeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 18 mph.

    High: 63 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47. West northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 57. Chance of precipitation is 40%.

    High: 57 °F

    Slight Chance
    Rain then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 39.

    Low: 39 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of rain between 10pm and midnight. Snow level 9900 feet lowering to 8900 feet after midnight . Mostly cloudy during the early evening, then becoming clear, with a low around 36. West northwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 26 mph.
Thursday
Sunny, with a high near 57. West northwest wind 6 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 39. West northwest wind 7 to 14 mph becoming northeast after midnight. Winds could gust as high as 22 mph.
Juneteenth
Mostly sunny, with a high near 63. East northeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Partly cloudy, with a low around 47. West northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Saturday
A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 57. Chance of precipitation is 40%.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 39.
Sunday
Sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 64.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles S Georgetown MT
 45.98°N 113.29°W (Elev. 8609 ft)
Last Update:
2:01 pm MDT Jun 17, 2026
Forecast Valid:
8pm MDT Jun 17, 2026-6pm MDT Jun 24, 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