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

45°F

7°C

Humidity 49%
Wind Speed N 15 mph
Barometer 29.74 in (1008.2 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 9 Mar 3:53 pm CDT
Extended Forecast for

3 Miles N Altamont SD

  • This Afternoon

    This Afternoon: Sunny, with a steady temperature around 42. North northeast wind around 13 mph, with gusts as high as 23 mph.

    High: 42 °F

    Sunny

  • Tonight

    Tonight: A slight chance of snow before 2am, then a slight chance of snow after 3am. Increasing clouds, with a low around 26. North northeast wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 26 °F

    Slight Chance
    Snow

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 39. Northeast wind 10 to 13 mph.

    High: 39 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Rain and snow before 9pm, then snow, possibly mixed with sleet between 9pm and 10pm, then snow after 10pm. Low around 25. North wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow and sleet accumulation of around an inch possible.

    Low: 25 °F

    Wintry Mix
    then Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 39 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 24. Northwest wind 8 to 11 mph becoming south southwest after midnight. Winds could gust as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of rain and snow after 1pm. Mostly cloudy, with a high near 48. South southwest wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    High: 48 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of rain and snow before 1am. Mostly cloudy, with a low around 24. Blustery, with a north northwest wind 15 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.

    Low: 24 °F

    Chance
    Rain/Snow and
    Blustery

  • Friday

    Friday: Mostly cloudy, with a high near 36. North northwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 36 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a steady temperature around 42. North northeast wind around 13 mph, with gusts as high as 23 mph.
Tonight
A slight chance of snow before 2am, then a slight chance of snow after 3am. Increasing clouds, with a low around 26. North northeast wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday
Mostly cloudy, with a high near 39. Northeast wind 10 to 13 mph.
Tuesday Night
Rain and snow before 9pm, then snow, possibly mixed with sleet between 9pm and 10pm, then snow after 10pm. Low around 25. North wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow and sleet accumulation of around an inch possible.
Wednesday
Mostly sunny, with a high near 39. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 24. Northwest wind 8 to 11 mph becoming south southwest after midnight. Winds could gust as high as 20 mph.
Thursday
A chance of rain and snow after 1pm. Mostly cloudy, with a high near 48. South southwest wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Thursday Night
A chance of rain and snow before 1am. Mostly cloudy, with a low around 24. Blustery, with a north northwest wind 15 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
Friday
Mostly cloudy, with a high near 36. North northwest wind 9 to 14 mph, with gusts as high as 23 mph.
Friday Night
A chance of snow, mainly after 1am. Cloudy, with a low around 24. Chance of precipitation is 40%.
Saturday
A chance of snow. Cloudy, with a high near 37. Chance of precipitation is 40%.
Saturday Night
Snow likely. The snow could be heavy at times. Cloudy, with a low around 14. Blustery. Chance of precipitation is 70%.
Sunday
A chance of snow. Mostly cloudy, with a high near 23. Blustery. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Altamont SD
 44.89°N 96.69°W (Elev. 1729 ft)
Last Update:
3:36 pm CDT Mar 9, 2026
Forecast Valid:
4pm CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation