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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair and Breezy

47°F

8°C

Humidity 54%
Wind Speed S 21 G 30 mph
Barometer 30.24 in (1025.3 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 17 Oct 9:53 am CDT
Extended Forecast for

Altamont SD

  • Today

    Today: Sunny, with a high near 60. Breezy, with a southwest wind 23 to 28 mph, with gusts as high as 41 mph.

    High: 60 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Increasing clouds, with a low around 44. Breezy, with a south southwest wind 22 to 25 mph, with gusts as high as 39 mph.

    Low: 44 °F

    Increasing
    Clouds and
    Breezy

  • Sunday

    Sunday: Sunny, with a high near 64. Breezy, with a southwest wind 16 to 21 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 64 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. Light and variable wind becoming north northwest around 5 mph after midnight.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62. North northeast wind 5 to 10 mph becoming southeast in the afternoon.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. South wind around 8 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66. South wind 9 to 15 mph, with gusts as high as 26 mph.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. South southeast wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. South wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 60. Breezy, with a southwest wind 23 to 28 mph, with gusts as high as 41 mph.
Tonight
Increasing clouds, with a low around 44. Breezy, with a south southwest wind 22 to 25 mph, with gusts as high as 39 mph.
Sunday
Sunny, with a high near 64. Breezy, with a southwest wind 16 to 21 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 32 mph.
Sunday Night
Mostly clear, with a low around 40. Light and variable wind becoming north northwest around 5 mph after midnight.
Monday
Sunny, with a high near 62. North northeast wind 5 to 10 mph becoming southeast in the afternoon.
Monday Night
Mostly clear, with a low around 43. South wind around 8 mph.
Tuesday
Sunny, with a high near 66. South wind 9 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 49. South southeast wind 10 to 13 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny, with a high near 72. South wind 9 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 55. Chance of precipitation is 20%.
Friday
A chance of showers. Partly sunny, with a high near 75. Breezy. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Altamont SD
 44.83°N 96.72°W (Elev. 1860 ft)
Last Update:
10:16 am CDT Oct 17, 2026
Forecast Valid:
10am CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation