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.

Fog/Mist

39°F

4°C

Humidity 96%
Wind Speed Calm
Barometer 29.90 in (1014.2 mb)
Dewpoint 38°F (3°C)
Visibility 1.75 mi
Last update 18 Mar 9:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 31. Light and variable wind.

    Low: 31 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Areas of fog between 9am and noon. Widespread dense freezing fog, mainly before 8am. Otherwise, partly sunny, with a high near 57. Light and variable wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 57 °F

    Dense
    Freezing Fog
    and Areas Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38. Southwest wind around 10 mph.

    Low: 38 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 64. West northwest wind 8 to 15 mph, with gusts as high as 23 mph.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 39. Northwest wind 8 to 10 mph becoming south southeast after midnight.

    Low: 39 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70. South southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 70 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 29. North northeast wind 15 to 18 mph, with gusts as high as 26 mph.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 40. North wind 16 to 18 mph.

    High: 40 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 22. North wind 8 to 14 mph becoming east southeast after midnight.

    Low: 22 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 31. Light and variable wind.
Thursday
Areas of fog between 9am and noon. Widespread dense freezing fog, mainly before 8am. Otherwise, partly sunny, with a high near 57. Light and variable wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 38. Southwest wind around 10 mph.
Friday
Mostly sunny, with a high near 64. West northwest wind 8 to 15 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 39. Northwest wind 8 to 10 mph becoming south southeast after midnight.
Saturday
Mostly sunny, with a high near 70. South southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly cloudy, with a low around 29. North northeast wind 15 to 18 mph, with gusts as high as 26 mph.
Sunday
Partly sunny, with a high near 40. North wind 16 to 18 mph.
Sunday Night
Partly cloudy, with a low around 22. North wind 8 to 14 mph becoming east southeast after midnight.
Monday
Mostly sunny, with a high near 47. Breezy.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly cloudy, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly cloudy, with a high near 59. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Castlewood SD
 44.72°N 96.96°W (Elev. 1749 ft)
Last Update:
9:36 pm CDT Mar 18, 2026
Forecast Valid:
9pm CDT Mar 18, 2026-6pm CDT Mar 25, 2026
 
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Additional Resources

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