National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

47°F

8°C

Humidity 66%
Wind Speed S 12 mph
Barometer 29.96 in (1014.9 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 18 Oct 2:53 am CDT
Extended Forecast for

Vienna SD

  • Overnight

    Overnight: Partly cloudy, with a low around 46. Breezy, with a south wind around 21 mph.

    Low: 46 °F

    Partly Cloudy
    and Breezy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 64. South wind 11 to 16 mph becoming east southeast 5 to 10 mph in the afternoon.

    High: 64 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. East northeast wind 3 to 8 mph.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 61. East northeast wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. Southeast wind around 8 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 65. South wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 65 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. South wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70. South wind around 7 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48. East northeast wind around 6 mph.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 46. Breezy, with a south wind around 21 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 64. South wind 11 to 16 mph becoming east southeast 5 to 10 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 42. East northeast wind 3 to 8 mph.
Monday
Sunny, with a high near 61. East northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 43. Southeast wind around 8 mph.
Tuesday
Sunny, with a high near 65. South wind 10 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 49. South wind 9 to 13 mph, with gusts as high as 22 mph.
Wednesday
Sunny, with a high near 70. South wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 48. East northeast wind around 6 mph.
Thursday
Sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Partly sunny, with a high near 77. Breezy.
Friday Night
A chance of showers. Mostly cloudy, with a low around 56. Breezy. Chance of precipitation is 30%.
Saturday
A chance of showers. Mostly cloudy, with a high near 70. Breezy. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vienna SD
 44.71°N 97.5°W (Elev. 1801 ft)
Last Update:
3:21 am CDT Oct 18, 2026
Forecast Valid:
3am CDT Oct 18, 2026-6pm CDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation