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

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

42°F

6°C

Humidity 68%
Wind Speed S 14 mph
Barometer 29.80 in (1011.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 7 Mar 3:53 pm CST
Extended Forecast for

4 Miles W Altamont SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a steady temperature around 40. Southwest wind around 17 mph, with gusts as high as 30 mph.

    High: 40 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. Breezy, with a west southwest wind 15 to 22 mph, with gusts as high as 34 mph.

    Low: 34 °F

    Mostly Cloudy
    and Breezy

  • Sunday

    Sunday: Sunny, with a high near 60. Breezy, with a west southwest wind 15 to 23 mph, with gusts as high as 36 mph.

    High: 60 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. West southwest wind 11 to 17 mph becoming north after midnight. Winds could gust as high as 28 mph.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 47. North wind 11 to 14 mph.

    High: 47 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of snow after midnight. Mostly cloudy, with a low around 26. Northeast wind 14 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    Low: 26 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: A slight chance of snow after noon. Mostly cloudy, with a high near 40. Northeast wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 40 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: A chance of snow. Mostly cloudy, with a low around 23. North wind 11 to 17 mph. Chance of precipitation is 40%.

    Low: 23 °F

    Chance Snow

  • Wednesday

    Wednesday: Partly sunny, with a high near 38. Northwest wind 11 to 16 mph, with gusts as high as 26 mph.

    High: 38 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 40. Southwest wind around 17 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 34. Breezy, with a west southwest wind 15 to 22 mph, with gusts as high as 34 mph.
Sunday
Sunny, with a high near 60. Breezy, with a west southwest wind 15 to 23 mph, with gusts as high as 36 mph.
Sunday Night
Mostly clear, with a low around 34. West southwest wind 11 to 17 mph becoming north after midnight. Winds could gust as high as 28 mph.
Monday
Mostly sunny, with a high near 47. North wind 11 to 14 mph.
Monday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around 26. Northeast wind 14 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Tuesday
A slight chance of snow after noon. Mostly cloudy, with a high near 40. Northeast wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 23. North wind 11 to 17 mph. Chance of precipitation is 40%.
Wednesday
Partly sunny, with a high near 38. Northwest wind 11 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 24.
Thursday
Mostly cloudy, with a high near 52. Breezy.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Blustery. Chance of precipitation is 40%.
Friday
Mostly cloudy, with a high near 39. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Altamont SD
 44.85°N 96.78°W (Elev. 1900 ft)
Last Update:
3:36 pm CST Mar 7, 2026
Forecast Valid:
4pm CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation