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.

Overcast

63°F

17°C

Humidity 97%
Wind Speed Calm
Barometer 30.04 in (1017.0 mb)
Dewpoint 62°F (17°C)
Visibility 7.00 mi
Last update 27 Sep 5:53 am CDT
Extended Forecast for

Watertown SD

  • Today

    Today: Areas of fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 72. Calm wind becoming east northeast 5 to 9 mph in the morning.

    High: 72 °F

    Areas Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 56. East wind around 7 mph.

    Low: 56 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Cloudy, with a high near 71. South wind 9 to 17 mph, with gusts as high as 28 mph.

    High: 71 °F

    Cloudy

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 59. South wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Cloudy then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 70. South wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 70 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 54. South wind 3 to 6 mph.

    Low: 54 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. West wind 5 to 9 mph.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. North wind 6 to 8 mph.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65. North wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 65 °F

    Mostly Sunny

Detailed Forecast

Today
Areas of fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 72. Calm wind becoming east northeast 5 to 9 mph in the morning.
Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 56. East wind around 7 mph.
Monday
Cloudy, with a high near 71. South wind 9 to 17 mph, with gusts as high as 28 mph.
Monday Night
Showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 59. South wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 70. South wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Mostly cloudy, with a low around 54. South wind 3 to 6 mph.
Wednesday
Mostly sunny, with a high near 72. West wind 5 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 52. North wind 6 to 8 mph.
Thursday
Mostly sunny, with a high near 65. North wind 9 to 13 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 47.
Friday
Mostly sunny, with a high near 63.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.17°W (Elev. 1755 ft)
Last Update:
5:56 am CDT Sep 27, 2026
Forecast Valid:
6am CDT Sep 27, 2026-6pm CDT Oct 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation