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.

Fog/Mist

64°F

18°C

Humidity 93%
Wind Speed S 8 mph
Barometer 29.95 in (1014.0 mb)
Dewpoint 62°F (17°C)
Visibility 5.00 mi
Last update 26 Sep 7:53 pm CDT
Extended Forecast for

Watertown SD

  • Tonight

    Tonight: Patchy fog. Otherwise, cloudy, with a low around 58. South southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 58 °F

    Patchy Fog

  • Sunday

    Sunday: Widespread dense fog, mainly before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 71. Calm wind becoming northeast 5 to 9 mph in the morning.

    High: 71 °F

    Dense Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55. East northeast wind around 7 mph.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 70. South wind 7 to 16 mph, with gusts as high as 26 mph.

    High: 70 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 59. South wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Cloudy then
    Showers

  • Tuesday

    Tuesday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 69. South southwest wind 8 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 69 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 53. Northwest wind around 6 mph becoming light and variable after midnight.

    Low: 53 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 70. South southwest wind 5 to 8 mph.

    High: 70 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. South southwest wind 5 to 7 mph becoming northwest after midnight.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog. Otherwise, cloudy, with a low around 58. South southeast wind 5 to 7 mph becoming calm after midnight.
Sunday
Widespread dense fog, mainly before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 71. Calm wind becoming northeast 5 to 9 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 55. East northeast wind around 7 mph.
Monday
Mostly cloudy, with a high near 70. South wind 7 to 16 mph, with gusts as high as 26 mph.
Monday Night
Showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 59. South wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 69. South southwest wind 8 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Mostly cloudy, with a low around 53. Northwest wind around 6 mph becoming light and variable after midnight.
Wednesday
Mostly sunny, with a high near 70. South southwest wind 5 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 52. South southwest wind 5 to 7 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Mostly clear, with a low around 48.
Friday
A slight chance of showers. Mostly sunny, with a high near 64. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
Last Update:
8:21 pm CDT Sep 26, 2026
Forecast Valid:
8pm CDT Sep 26, 2026-6pm CDT Oct 3, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation