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.

Light Rain

51°F

11°C

Humidity 89%
Wind Speed E 6 mph
Barometer 30.24 in (1024.5 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 21 Sep 10:53 am CDT
Extended Forecast for

Watertown SD

  • Today

    Today: Mostly cloudy, with a high near 55. East wind 7 to 10 mph.

    High: 55 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of showers before 4am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 47. East wind 5 to 9 mph. Chance of precipitation is 20%.

    Low: 47 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 60. Southeast wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 60 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 48. South southeast wind around 11 mph, with gusts as high as 20 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers after 1pm. Mostly cloudy, with a high near 63. South southeast wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    High: 63 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm, then showers after 10pm. Low around 52. South wind 15 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Showers

  • Thursday

    Thursday: Mostly cloudy, with a high near 66. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 66 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of showers after 1am. Mostly cloudy, with a low around 54. South southeast wind around 8 mph. Chance of precipitation is 20%.

    Low: 54 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 66. South southeast wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 66 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, with a high near 55. East wind 7 to 10 mph.
Tonight
A slight chance of showers before 4am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 47. East wind 5 to 9 mph. Chance of precipitation is 20%.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 60. Southeast wind 8 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 48. South southeast wind around 11 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of showers after 1pm. Mostly cloudy, with a high near 63. South southeast wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Wednesday Night
Showers likely and possibly a thunderstorm, then showers after 10pm. Low around 52. South wind 15 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly cloudy, with a high near 66. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 54. South southeast wind around 8 mph. Chance of precipitation is 20%.
Friday
A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 66. South southeast wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 55. Chance of precipitation is 50%.
Saturday
A chance of showers. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.17°W (Elev. 1755 ft)
Last Update:
11:22 am CDT Sep 21, 2026
Forecast Valid:
11am CDT Sep 21, 2026-6pm CDT Sep 27, 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