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.

Fair

82°F

28°C

Humidity 51%
Wind Speed Vrbl 5 mph
Barometer 30.03 in (1015.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 4 Jul 12:53 pm CDT
Extended Forecast for

3 Miles N Altamont SD

  • Independence Day

    Independence Day: A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 83. East wind around 5 mph becoming light and variable. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 63. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 85. Light and variable wind becoming east around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. East southeast wind 5 to 9 mph becoming south after midnight.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 89. South wind around 11 mph, with gusts as high as 21 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 68. South wind around 8 mph. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. South southwest wind around 9 mph. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. South southeast wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    Low: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Southwest wind 11 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

Detailed Forecast

Independence Day
A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 83. East wind around 5 mph becoming light and variable. Chance of precipitation is 30%.
Tonight
A slight chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 63. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 85. Light and variable wind becoming east around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 65. East southeast wind 5 to 9 mph becoming south after midnight.
Monday
Sunny, with a high near 89. South wind around 11 mph, with gusts as high as 21 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. South wind around 8 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. South southwest wind around 9 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. South southeast wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Southwest wind 11 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 61.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Altamont SD
 44.89°N 96.69°W (Elev. 1729 ft)
Last Update:
12:36 pm CDT Jul 4, 2026
Forecast Valid:
1pm CDT Jul 4, 2026-6pm CDT Jul 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation