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 >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair and Breezy

58°F

14°C

Humidity 39%
Wind Speed S 25 G 35 mph
Barometer 30.15 in (1021.9 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 17 Oct 12:53 pm CDT
Extended Forecast for

5 Miles S Castlewood SD

  • This Afternoon

    This Afternoon: Sunny, with a high near 62. Breezy, with a south southwest wind 23 to 26 mph, with gusts as high as 34 mph.

    High: 62 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 45. South wind 14 to 18 mph, with gusts as high as 32 mph.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 67. South wind 5 to 13 mph, with gusts as high as 22 mph.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. Light east wind.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 61. East southeast wind 5 to 10 mph.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. South southeast wind 5 to 7 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66. South wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. South wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

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

    High: 70 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 62. Breezy, with a south southwest wind 23 to 26 mph, with gusts as high as 34 mph.
Tonight
Mostly clear, with a low around 45. South wind 14 to 18 mph, with gusts as high as 32 mph.
Sunday
Sunny, with a high near 67. South wind 5 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 41. Light east wind.
Monday
Sunny, with a high near 61. East southeast wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 43. South southeast wind 5 to 7 mph.
Tuesday
Sunny, with a high near 66. South wind 8 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 49. South wind 7 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 70. South wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 72.
Thursday Night
Partly cloudy, with a low around 54.
Friday
A slight chance of showers. Partly sunny, with a high near 73. Breezy. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles S Castlewood SD
 44.65°N 97.05°W (Elev. 1640 ft)
Last Update:
12:21 pm CDT Oct 17, 2026
Forecast Valid:
1pm CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation