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

Isaias Expected To Be A Strong Hurricane Approaching The Northern Gulf Coast Friday

Isaias is expected to strengthen and be a strong hurricane when it approaches the northern Gulf Coast on Friday. Damaging hurricane-force winds and life-threatening storm surge impacts are expected Friday into Saturday. Isaias will bring heavy rainfall to the northern Gulf Coast and much of the Southeast U.S. Friday into the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

Lat: 43.73°NLon: 103.62°WElev: 5600ft.

Fair

42°F

6°C

Humidity 58%
Wind Speed N 5 mph
Barometer 30.19 in (1017.5 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 8 Oct 1:53 am MDT
Extended Forecast for

Mount Rushmore SD

Fire Weather Watch October 9, 11:00am until October 9, 08:00pm
Click here for hazard details and duration
Fire Weather Watch

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 45. Calm wind.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 73. Light and variable wind. Winds could gust as high as 15 mph.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55. Calm wind becoming southwest 5 to 7 mph after midnight. Winds could gust as high as 18 mph.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 81. Southwest wind 7 to 11 mph, with gusts as high as 29 mph.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. Southwest wind 6 to 11 mph, with gusts as high as 32 mph.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79. West wind 5 to 11 mph, with gusts as high as 32 mph.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain. Mostly cloudy, with a high near 54.

    High: 54 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Rain, mainly after midnight. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Rain

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 45. Calm wind.
Thursday
Sunny, with a high near 73. Light and variable wind. Winds could gust as high as 15 mph.
Thursday Night
Partly cloudy, with a low around 55. Calm wind becoming southwest 5 to 7 mph after midnight. Winds could gust as high as 18 mph.
Friday
Sunny, with a high near 81. Southwest wind 7 to 11 mph, with gusts as high as 29 mph.
Friday Night
Mostly clear, with a low around 65. Southwest wind 6 to 11 mph, with gusts as high as 32 mph.
Saturday
Sunny, with a high near 79. West wind 5 to 11 mph, with gusts as high as 32 mph.
Saturday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 50.
Sunday
A slight chance of rain. Mostly cloudy, with a high near 54.
Sunday Night
Rain, mainly after midnight. Mostly cloudy, with a low around 39.
Columbus Day
Rain likely before 9am, then rain and snow likely between 9am and noon, then a chance of rain after noon. Mostly cloudy, with a high near 47.
Monday Night
A chance of rain. Mostly cloudy, with a low around 37.
Tuesday
Mostly sunny, with a high near 55.
Tuesday Night
A chance of rain. Partly cloudy, with a low around 44.
Wednesday
A chance of rain. Mostly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Rushmore SD
 43.87°N 103.46°W (Elev. 5000 ft)
Last Update:
12:31 am MDT Oct 8, 2026
Forecast Valid:
2am MDT Oct 8, 2026-6pm MDT Oct 14, 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