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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 10:26 am CDT Aug 11, 2026
 
This
Afternoon
This Afternoon: A 20 percent chance of showers and thunderstorms.  Sunny, with a high near 93. Heat index values as high as 103. Southwest wind 5 to 10 mph.
High: 93 °F
Tonight

Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm.  Partly cloudy, with a low around 74. South southwest wind around 5 mph.  Chance of precipitation is 30%.
Low: 74 °F
Wednesday

Wednesday: A slight chance of showers and thunderstorms between 2pm and 3pm.  Mostly sunny, with a high near 93. Heat index values as high as 103. Southwest wind 5 to 10 mph.  Chance of precipitation is 20%.
High: 93 °F
Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 74. South wind around 5 mph.
Low: 74 °F
Thursday

Thursday: Mostly sunny, with a high near 94. Southwest wind 5 to 10 mph.
High: 94 °F
Thursday
Night
Thursday Night: Partly cloudy, with a low around 75. South southwest wind around 5 mph.
Low: 75 °F
Friday

Friday: Mostly sunny, with a high near 95. South southwest wind around 5 mph becoming west in the afternoon.
High: 95 °F
Friday
Night
Friday Night: Partly cloudy, with a low around 74. Calm wind.
Low: 74 °F
Saturday

Saturday: Mostly sunny, with a high near 96. Calm wind becoming west northwest around 5 mph.
High: 96 °F
Slight Chance
T-storms

Chance
Showers then
Mostly Clear
Mostly Sunny
then Slight
Chance
T-storms
Partly Cloudy

Mostly Sunny

Partly Cloudy

Mostly Sunny

Partly Cloudy

Mostly Sunny

Heat Advisory
 

This Afternoon
 
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93. Heat index values as high as 103. Southwest wind 5 to 10 mph.
Tonight
 
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Partly cloudy, with a low around 74. South southwest wind around 5 mph. Chance of precipitation is 30%.
Wednesday
 
A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny, with a high near 93. Heat index values as high as 103. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
 
Partly cloudy, with a low around 74. South wind around 5 mph.
Thursday
 
Mostly sunny, with a high near 94. Southwest wind 5 to 10 mph.
Thursday Night
 
Partly cloudy, with a low around 75. South southwest wind around 5 mph.
Friday
 
Mostly sunny, with a high near 95. South southwest wind around 5 mph becoming west in the afternoon.
Friday Night
 
Partly cloudy, with a low around 74. Calm wind.
Saturday
 
Mostly sunny, with a high near 96. Calm wind becoming west northwest around 5 mph.
Saturday Night
 
Partly cloudy, with a low around 74.
Sunday
 
Sunny and hot, with a high near 98.
Sunday Night
 
Mostly clear, with a low around 75.
Monday
 
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 96.

 

Forecast from NOAA-NWS for Watertown TN.