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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 10:51 am CDT Aug 31, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 93. Heat index values as high as 100. West southwest wind around 5 mph becoming calm.
High: 93 °F
Tonight

Tonight: Mostly clear, with a low around 72. Calm wind.
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: Clear, with a low around 73. Calm wind.
Low: 73 °F
Wednesday

Wednesday: Sunny, with a high near 96. Calm wind.
High: 96 °F
Wednesday
Night
Wednesday Night: 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 72. Calm wind.
Low: 72 °F
Friday

Friday: A 30 percent chance of showers and thunderstorms after 1pm.  Sunny, with a high near 94. Calm wind becoming west around 5 mph.
High: 94 °F
Sunny

Mostly Clear

Sunny

Clear

Sunny

Clear

Sunny

Mostly Clear

Sunny then
Chance
T-storms

 

This Afternoon
 
Sunny, with a high near 93. Heat index values as high as 100. West southwest wind around 5 mph becoming calm.
Tonight
 
Mostly clear, with a low around 72. Calm wind.
Tuesday
 
Sunny, with a high near 95. Heat index values as high as 102. Calm wind.
Tuesday Night
 
Clear, with a low around 73. Calm wind.
Wednesday
 
Sunny, with a high near 96. Calm wind.
Wednesday Night
 
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 72. Calm wind.
Friday
 
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. Calm wind becoming west around 5 mph.
Friday Night
 
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 70.
Saturday
 
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.
Saturday Night
 
Mostly clear, with a low around 67.
Sunday
 
Sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.