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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 7:06 pm CDT Aug 30, 2026
 
Overnight

Overnight: Mostly clear, with a low around 72. South wind around 5 mph becoming calm.
Low: 72 °F
Monday

Monday: Mostly sunny, with a high near 93. Heat index values as high as 100. Calm wind becoming southwest around 5 mph.
High: 93 °F
Monday
Night
Monday Night: Mostly clear, with a low around 72. South southeast wind around 5 mph becoming calm.
Low: 72 °F
Tuesday

Tuesday: Sunny, with a high near 95. Heat index values as high as 102. Calm wind.
High: 95 °F
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 74. Calm wind.
Low: 74 °F
Wednesday

Wednesday: Sunny, with a high near 95. Calm wind.
High: 95 °F
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 74. Calm wind.
Low: 74 °F
Thursday

Thursday: Sunny, with a high near 96. Calm wind.
High: 96 °F
Thursday
Night
Thursday Night: Mostly clear, with a low around 74. Calm wind.
Low: 74 °F
Mostly Clear
Mostly Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Mostly Clear
Sunny
Mostly Clear

 

Overnight
 
Mostly clear, with a low around 72. South wind around 5 mph becoming calm.
Monday
 
Mostly sunny, with a high near 93. Heat index values as high as 100. Calm wind becoming southwest around 5 mph.
Monday Night
 
Mostly clear, with a low around 72. South southeast wind around 5 mph becoming calm.
Tuesday
 
Sunny, with a high near 95. Heat index values as high as 102. Calm wind.
Tuesday Night
 
Mostly clear, with a low around 74. Calm wind.
Wednesday
 
Sunny, with a high near 95. Calm wind.
Wednesday Night
 
Mostly clear, with a low around 74. Calm wind.
Thursday
 
Sunny, with a high near 96. Calm wind.
Thursday Night
 
Mostly clear, with a low around 74. Calm wind.
Friday
 
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95.
Friday Night
 
Partly cloudy, with a low around 72.
Saturday
 
Sunny, with a high near 93.
Saturday Night
 
Mostly clear, with a low around 68.
Sunday
 
Sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.