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

43°F

6°C

Humidity 35%
Wind Speed Vrbl 5 mph
Barometer 30.24 in (1025.9 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 19 Apr 5:53 pm CDT
Extended Forecast for

Watertown SD

  • Tonight

    Tonight: Mostly clear, with a low around 27. North wind 6 to 10 mph becoming south southeast after midnight.

    Low: 27 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 68. Breezy, with a south wind 14 to 24 mph, with gusts as high as 34 mph.

    High: 68 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Southwest wind 5 to 14 mph becoming north after midnight.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. North northeast wind around 8 mph becoming east in the afternoon.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. East southeast wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. Breezy, with a south wind 14 to 23 mph, with gusts as high as 36 mph.

    High: 85 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 57. Breezy, with a south wind 24 to 26 mph, with gusts as high as 39 mph. Chance of precipitation is 50%.

    Low: 57 °F

    Breezy.
    Slight Chance
    Showers then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly sunny, with a high near 72. Breezy, with a south southwest wind 23 to 29 mph, with gusts as high as 40 mph. Chance of precipitation is 40%.

    High: 72 °F

    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A slight chance of rain showers before 1am, then a slight chance of rain and snow showers between 1am and 4am, then a slight chance of snow showers after 4am. Partly cloudy, with a low around 34. Breezy, with a west wind 24 to 28 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Breezy.
    Slight Chance
    Showers then
    Slight Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 27. North wind 6 to 10 mph becoming south southeast after midnight.
Monday
Mostly sunny, with a high near 68. Breezy, with a south wind 14 to 24 mph, with gusts as high as 34 mph.
Monday Night
Mostly clear, with a low around 40. Southwest wind 5 to 14 mph becoming north after midnight.
Tuesday
Sunny, with a high near 73. North northeast wind around 8 mph becoming east in the afternoon.
Tuesday Night
Mostly clear, with a low around 50. East southeast wind 9 to 14 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny, with a high near 85. Breezy, with a south wind 14 to 23 mph, with gusts as high as 36 mph.
Wednesday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 57. Breezy, with a south wind 24 to 26 mph, with gusts as high as 39 mph. Chance of precipitation is 50%.
Thursday
A chance of showers. Mostly sunny, with a high near 72. Breezy, with a south southwest wind 23 to 29 mph, with gusts as high as 40 mph. Chance of precipitation is 40%.
Thursday Night
A slight chance of rain showers before 1am, then a slight chance of rain and snow showers between 1am and 4am, then a slight chance of snow showers after 4am. Partly cloudy, with a low around 34. Breezy, with a west wind 24 to 28 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 53. Breezy.
Friday Night
Partly cloudy, with a low around 29.
Saturday
A slight chance of snow showers. Mostly sunny, with a high near 50. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
A slight chance of showers. Mostly sunny, with a high near 54. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
Last Update:
5:36 pm CDT Apr 19, 2026
Forecast Valid:
6pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation