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

Dangerous Heat in the West; Coastal Flooding & High Rip Current Risk through the Weekend on the East Coast; Flash Flooding Concerns in the Southeast and Southwest

A dangerous, record heat wave continues across portions of the West through Tuesday. High rip current risk and dangerous surf continue through the weekend. There are flash flooding concerns through the weekend for portions of the Southeast and Southwest. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

77°F

25°C

Humidity 58%
Wind Speed W 10 mph
Barometer 30.05 in (1016.7 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 22 Aug 6:53 pm CDT
Extended Forecast for

3 Miles N Altamont SD

  • Tonight

    Tonight: Clear, with a low around 53. Northwest wind 5 to 10 mph.

    Low: 53 °F

    Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 67. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49. West northwest wind 6 to 10 mph.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65. North northwest wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45. Northwest wind 6 to 10 mph.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 66. North wind 6 to 9 mph.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. North northeast wind around 6 mph becoming light and variable.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 71. Southwest wind around 6 mph becoming south southeast in the afternoon.

    High: 71 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51. Southeast wind 6 to 9 mph becoming south southwest after midnight.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 53. Northwest wind 5 to 10 mph.
Saturday
Increasing clouds, with a high near 67. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 49. West northwest wind 6 to 10 mph.
Sunday
Sunny, with a high near 65. North northwest wind 8 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 45. Northwest wind 6 to 10 mph.
Monday
Sunny, with a high near 66. North wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 46. North northeast wind around 6 mph becoming light and variable.
Tuesday
Sunny, with a high near 71. Southwest wind around 6 mph becoming south southeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 51. Southeast wind 6 to 9 mph becoming south southwest after midnight.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 56.
Friday
A slight chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Altamont SD
 44.89°N 96.69°W (Elev. 1729 ft)
Last Update:
7:44 pm CDT Aug 22, 2025
Forecast Valid:
7pm CDT Aug 22, 2025-6pm CDT Aug 29, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation