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

46°F

8°C

Humidity 93%
Wind Speed N 13 mph
Barometer 29.82 in (1010.6 mb)
Dewpoint 44°F (7°C)
Visibility 8.00 mi
Wind Chill40°F (4°C)
Last update 18 May 5:53 pm CDT
Extended Forecast for

Wallace SD

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 11pm, then a slight chance of showers between 11pm and midnight. Low around 37. North wind 16 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 37 °F

    Showers then
    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 50. Northwest wind 16 to 18 mph, with gusts as high as 29 mph.

    High: 50 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Patchy frost after 3am. Otherwise, partly cloudy, with a low around 32. Northwest wind 8 to 13 mph becoming light and variable in the evening.

    Low: 32 °F

    Partly Cloudy
    then Patchy
    Frost

  • Wednesday

    Wednesday: Areas of frost before 8am. Otherwise, sunny, with a high near 62. South wind 6 to 13 mph.

    High: 62 °F

    Areas Frost
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 41. South southeast wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 41 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 29 mph.

    High: 65 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: A slight chance of showers after 1am. Mostly cloudy, with a low around 42. South southeast wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    Low: 42 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 61. Southeast wind 13 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    High: 61 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 43. East southeast wind 8 to 11 mph. Chance of precipitation is 40%.

    Low: 43 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 11pm, then a slight chance of showers between 11pm and midnight. Low around 37. North wind 16 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Mostly cloudy, with a high near 50. Northwest wind 16 to 18 mph, with gusts as high as 29 mph.
Tuesday Night
Patchy frost after 3am. Otherwise, partly cloudy, with a low around 32. Northwest wind 8 to 13 mph becoming light and variable in the evening.
Wednesday
Areas of frost before 8am. Otherwise, sunny, with a high near 62. South wind 6 to 13 mph.
Wednesday Night
Mostly cloudy, with a low around 41. South southeast wind 9 to 13 mph, with gusts as high as 22 mph.
Thursday
Mostly sunny, with a high near 65. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 29 mph.
Thursday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 42. South southeast wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 61. Southeast wind 13 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43. East southeast wind 8 to 11 mph. Chance of precipitation is 40%.
Saturday
A slight chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 52. Chance of precipitation is 20%.
Memorial Day
Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Wallace SD
 45.07°N 97.48°W (Elev. 1814 ft)
Last Update:
5:36 pm CDT May 18, 2026
Forecast Valid:
6pm CDT May 18, 2026-6pm CDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation