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

74°F

23°C

Humidity 97%
Wind Speed E 8 mph
Barometer 29.62 in (1001.7 mb)
Dewpoint 73°F (23°C)
Visibility 6.00 mi
Last update 29 Jun 12:53 am CDT
Extended Forecast for

Vienna SD

  • Overnight

    Overnight: Patchy fog before 5am. Otherwise, mostly cloudy, with a low around 69. East wind 9 to 11 mph.

    Low: 69 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 7am. Otherwise, mostly sunny and hot, with a high near 94. Breezy, with an east southeast wind 14 to 19 mph becoming south southwest 20 to 25 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 94 °F

    Breezy.
    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 30 mph.

    Low: 65 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. West southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. West southwest wind 6 to 9 mph becoming east southeast after midnight. Chance of precipitation is 40%.

    Low: 65 °F

    Mostly Clear
    then Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. South southeast wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 67. West wind 6 to 9 mph becoming east after midnight. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 91. South southeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    High: 91 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. Southeast wind 10 to 18 mph becoming east northeast in the evening. Winds could gust as high as 26 mph. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

Detailed Forecast

Overnight
Patchy fog before 5am. Otherwise, mostly cloudy, with a low around 69. East wind 9 to 11 mph.
Monday
Patchy fog before 7am. Otherwise, mostly sunny and hot, with a high near 94. Breezy, with an east southeast wind 14 to 19 mph becoming south southwest 20 to 25 mph in the afternoon. Winds could gust as high as 34 mph.
Monday Night
Mostly clear, with a low around 65. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 30 mph.
Tuesday
Sunny, with a high near 87. West southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. West southwest wind 6 to 9 mph becoming east southeast after midnight. Chance of precipitation is 40%.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. South southeast wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 67. West wind 6 to 9 mph becoming east after midnight. Chance of precipitation is 40%.
Thursday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 91. South southeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. Southeast wind 10 to 18 mph becoming east northeast in the evening. Winds could gust as high as 26 mph. Chance of precipitation is 70%.
Friday
Mostly sunny and hot, with a high near 92.
Friday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 70. Chance of precipitation is 40%.
Independence Day
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 50%.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna SD
 44.71°N 97.5°W (Elev. 1801 ft)
Last Update:
12:36 am CDT Jun 29, 2026
Forecast Valid:
1am CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation