Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Watertown, Watertown International Airport (KART)

Lat: 43.99°NLon: 76.02°WElev: 325ft.

Overcast

69°F

21°C

Humidity 81%
Wind Speed SW 9 mph
Barometer 29.86 in (1010.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 19 Aug 12:56 pm EDT
Extended Forecast for

Watertown NY

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms after 3pm.  Mostly cloudy, with a high near 75. Southwest wind around 10 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Showers
    Likely

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 74. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 53. Light and variable wind.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 75. Calm wind becoming north around 5 mph in the afternoon.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. Calm wind becoming southeast around 5 mph after midnight.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 81. South wind 7 to 9 mph.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Showers, mainly after 8pm.  Low around 60. South wind 6 to 8 mph.  Chance of precipitation is 90%.

    Low: 60 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 2pm.  High near 74. Chance of precipitation is 80%.

    High: 74 °F

    Showers

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 75. Southwest wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Partly cloudy, with a low around 57. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 74. Calm wind becoming west 5 to 8 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 53. Light and variable wind.
Friday
Sunny, with a high near 75. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 59. Calm wind becoming southeast around 5 mph after midnight.
Saturday
Mostly sunny, with a high near 81. South wind 7 to 9 mph.
Saturday Night
Showers, mainly after 8pm. Low around 60. South wind 6 to 8 mph. Chance of precipitation is 90%.
Sunday
Showers, with thunderstorms also possible after 2pm. High near 74. Chance of precipitation is 80%.
Sunday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Monday
A chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 50%.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown NY
 43.98°N 75.91°W (Elev. 449 ft)
9:58 am EDT Aug 19, 2026
1pm EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database