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.

Fair

47°F

8°C

Humidity 63%
Wind Speed NE 3 mph
Barometer 30.23 in (1024.1 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 1 Oct 9:53 pm CDT
Extended Forecast for

Watertown SD

  • Tonight

    Tonight: Mostly clear, with a low around 42. North northwest wind 5 to 9 mph becoming light north after midnight.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 59. Light and variable wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 59 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 48. South southeast wind 10 to 18 mph, with gusts as high as 30 mph.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers after 1pm. Increasing clouds, with a high near 68. Breezy, with a south wind 11 to 20 mph becoming west in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 20%.

    High: 68 °F

    Sunny and
    Breezy then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 47. Northwest wind 7 to 9 mph.

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 64. North northwest wind around 7 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 44. Calm wind becoming southeast around 5 mph after midnight.

    Low: 44 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 66. Breezy, with a south southeast wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 66 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. Breezy, with a south wind 16 to 20 mph, with gusts as high as 31 mph.

    Low: 53 °F

    Clear and
    Breezy then
    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 42. North northwest wind 5 to 9 mph becoming light north after midnight.
Friday
Mostly sunny, with a high near 59. Light and variable wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 48. South southeast wind 10 to 18 mph, with gusts as high as 30 mph.
Saturday
A slight chance of showers after 1pm. Increasing clouds, with a high near 68. Breezy, with a south wind 11 to 20 mph becoming west in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 47. Northwest wind 7 to 9 mph.
Sunday
Sunny, with a high near 64. North northwest wind around 7 mph.
Sunday Night
Clear, with a low around 44. Calm wind becoming southeast around 5 mph after midnight.
Monday
Sunny, with a high near 66. Breezy, with a south southeast wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph.
Monday Night
Mostly clear, with a low around 53. Breezy, with a south wind 16 to 20 mph, with gusts as high as 31 mph.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
Mostly sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Mostly sunny, with a high near 69.
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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:
9:21 pm CDT Oct 1, 2026
Forecast Valid:
10pm CDT Oct 1, 2026-6pm CDT Oct 8, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation