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

73°F

23°C

Humidity 100%
Wind Speed SE 5 mph
Barometer 29.60 in (1001.0 mb)
Dewpoint 73°F (23°C)
Visibility 1.25 mi
Last update 29 Jun 2:53 am CDT
Extended Forecast for

Vienna SD

Heat Advisory June 29, 12:00pm until June 29, 08:00pm
Dense Fog Advisory until June 29, 09:00am
Click here for hazard details and duration
Heat Advisory
Dense Fog Advisory
  •  
    Dense Fog Advisory until June 29, 09:00am

    NOW until 9:00am Mon

    Dense Fog Advisory

  • Overnight

    Low: 70 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 9am. Otherwise, mostly sunny and hot, with a high near 94. Heat index values as high as 99. 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 64. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 64 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. West southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. West southwest wind 6 to 9 mph becoming east southeast after midnight. Chance of precipitation is 40%.

    Low: 64 °F

    Mostly Clear
    then Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. 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 50%.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 64. West wind 6 to 9 mph becoming east after midnight. Chance of precipitation is 40%.

    Low: 64 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 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 30%.

    High: 91 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 70. East wind around 11 mph, with gusts as high as 20 mph.
Monday
Patchy fog before 9am. Otherwise, mostly sunny and hot, with a high near 94. Heat index values as high as 99. 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 64. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday
Sunny, with a high near 86. 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 64. West southwest wind 6 to 9 mph becoming east southeast after midnight. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. 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 50%.
Wednesday Night
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 64. West wind 6 to 9 mph becoming east after midnight. Chance of precipitation is 40%.
Thursday
A 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 30%.
Thursday Night
Showers and thunderstorms likely, mainly before 1am. Partly cloudy, with a low around 68. Southeast wind 9 to 18 mph becoming east northeast in the evening. Chance of precipitation is 70%.
Friday
Mostly sunny, with a high near 88.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 40%.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 40%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 50%.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80. 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 97.47°W (Elev. 1798 ft)
Last Update:
2:36 am CDT Jun 29, 2026
Forecast Valid:
3am CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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