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

72°F

22°C

Humidity 64%
Wind Speed NW 6 mph
Barometer 30.07 in (1017.4 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 26 Aug 7:53 pm CDT
Extended Forecast for

Vienna SD

  • Tonight

    Tonight: Mostly clear, with a low around 56. North northwest wind 3 to 6 mph.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. North wind 3 to 6 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. East northeast wind 5 to 9 mph becoming southeast after midnight.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 86. South wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    High: 86 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Breezy, with a south southeast wind 17 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Showers
    Likely and
    Breezy

  • Saturday

    Saturday: Mostly sunny, with a high near 88. South wind 11 to 18 mph, with gusts as high as 26 mph.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. Southeast wind 8 to 11 mph.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 88. Northeast wind 9 to 11 mph becoming west in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65. West northwest wind around 10 mph becoming northeast after midnight. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 56. North northwest wind 3 to 6 mph.
Thursday
Sunny, with a high near 83. North wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 59. East northeast wind 5 to 9 mph becoming southeast after midnight.
Friday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 86. South wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Breezy, with a south southeast wind 17 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 88. South wind 11 to 18 mph, with gusts as high as 26 mph.
Saturday Night
Partly cloudy, with a low around 68. Southeast wind 8 to 11 mph.
Sunday
Mostly sunny, with a high near 88. Northeast wind 9 to 11 mph becoming west in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65. West northwest wind around 10 mph becoming northeast after midnight. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna SD
 44.71°N 97.5°W (Elev. 1801 ft)
Last Update:
7:06 pm CDT Aug 26, 2026
Forecast Valid:
8pm CDT Aug 26, 2026-6pm CDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation