Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

29°F

-2°C

Humidity 78%
Wind Speed S 16 G 25 mph
Barometer 30.04 in (1019.5 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 24 Dec 3:53 am CST
Extended Forecast for

Watertown SD

  • Today

    Today: Mostly cloudy through mid morning, then becoming sunny, with a high near 38. South wind 10 to 15 mph becoming light and variable.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: A slight chance of freezing rain after 3am.  Mostly cloudy, with a low around 23. Northeast wind around 10 mph.  Chance of precipitation is 10%.

    Low: 23 °F

    Mostly Cloudy
    then Slight
    Chance
    Freezing Rain

  • Christmas Day

    Christmas Day: A slight chance of freezing rain between 8am and 9am.  Mostly cloudy, with a high near 37. East wind 9 to 16 mph becoming south in the afternoon. Winds could gust as high as 28 mph.  Chance of precipitation is 10%.

    High: 37 °F

    Slight Chance
    Freezing Rain
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28. South southeast wind 7 to 14 mph becoming west northwest after midnight. Winds could gust as high as 22 mph.

    Low: 28 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39. Northwest wind around 7 mph becoming south in the afternoon.

    High: 39 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30. South wind 7 to 10 mph.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 44. South southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.

    High: 44 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 5. Blustery, with a northwest wind 16 to 22 mph, with gusts as high as 37 mph.

    Low: 5 °F

    Mostly Cloudy
    and Blustery

  • Sunday

    Sunday: Mostly sunny and cold, with a high near 10. Blustery, with a northwest wind 21 to 24 mph, with gusts as high as 39 mph.

    High: 10 °F

    Cold and
    Blustery

Detailed Forecast

Today
Mostly cloudy through mid morning, then becoming sunny, with a high near 38. South wind 10 to 15 mph becoming light and variable.
Tonight
A slight chance of freezing rain after 3am. Mostly cloudy, with a low around 23. Northeast wind around 10 mph. Chance of precipitation is 10%.
Christmas Day
A slight chance of freezing rain between 8am and 9am. Mostly cloudy, with a high near 37. East wind 9 to 16 mph becoming south in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 10%.
Thursday Night
Mostly cloudy, with a low around 28. South southeast wind 7 to 14 mph becoming west northwest after midnight. Winds could gust as high as 22 mph.
Friday
Partly sunny, with a high near 39. Northwest wind around 7 mph becoming south in the afternoon.
Friday Night
Partly cloudy, with a low around 30. South wind 7 to 10 mph.
Saturday
Mostly sunny, with a high near 44. South southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.
Saturday Night
Mostly cloudy, with a low around 5. Blustery, with a northwest wind 16 to 22 mph, with gusts as high as 37 mph.
Sunday
Mostly sunny and cold, with a high near 10. Blustery, with a northwest wind 21 to 24 mph, with gusts as high as 39 mph.
Sunday Night
Mostly clear, with a low around -1. Blustery.
Monday
Mostly sunny, with a high near 16.
Monday Night
Mostly cloudy, with a low around 9.
Tuesday
Mostly cloudy, with a high near 30.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
3:37 am CST Dec 24, 2025
4am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database