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

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

27°F

-3°C

Humidity 66%
Wind Speed S 10 mph
Barometer 30.20 in (1024.5 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 20 Apr 3:53 am CDT
Extended Forecast for

Watertown SD

Red Flag Warning April 20, 11:00am until April 20, 08:00pm
Click here for hazard details and duration
Red Flag Warning

  • Today

    Today: Sunny, with a high near 67. Breezy, with a south southwest wind 13 to 23 mph, with gusts as high as 36 mph.

    High: 67 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 39. Southwest wind 5 to 10 mph becoming northeast after midnight.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. East northeast wind around 8 mph.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. East southeast wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84. Breezy, with a south wind 14 to 23 mph, with gusts as high as 33 mph.

    High: 84 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 56. Breezy, with a south wind 21 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    Showers and
    Breezy

  • Thursday

    Thursday: A chance of showers. Mostly sunny, with a high near 72. Breezy, with a south wind 22 to 26 mph, with gusts as high as 39 mph. Chance of precipitation is 40%.

    High: 72 °F

    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A slight chance of showers before 1am. Partly cloudy, with a low around 34. Breezy, with a west wind 24 to 28 mph, with gusts as high as 38 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Slight Chance
    Showers and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 52. Breezy, with a west northwest wind 22 to 26 mph, with gusts as high as 36 mph.

    High: 52 °F

    Partly Sunny
    and Breezy

Detailed Forecast

Today
Sunny, with a high near 67. Breezy, with a south southwest wind 13 to 23 mph, with gusts as high as 36 mph.
Tonight
Mostly clear, with a low around 39. Southwest wind 5 to 10 mph becoming northeast after midnight.
Tuesday
Sunny, with a high near 73. East northeast wind around 8 mph.
Tuesday Night
Mostly clear, with a low around 49. East southeast wind 9 to 13 mph, with gusts as high as 22 mph.
Wednesday
Mostly sunny, with a high near 84. Breezy, with a south wind 14 to 23 mph, with gusts as high as 33 mph.
Wednesday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 56. Breezy, with a south wind 21 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly sunny, with a high near 72. Breezy, with a south wind 22 to 26 mph, with gusts as high as 39 mph. Chance of precipitation is 40%.
Thursday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 34. Breezy, with a west wind 24 to 28 mph, with gusts as high as 38 mph. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 52. Breezy, with a west northwest wind 22 to 26 mph, with gusts as high as 36 mph.
Friday Night
Partly cloudy, with a low around 29. Blustery.
Saturday
Partly sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
A slight chance of showers. Partly sunny, with a high near 53. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
Last Update:
4:36 am CDT Apr 20, 2026
Forecast Valid:
4am CDT Apr 20, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation