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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 6:06 pm CDT Sep 7, 2026
 
Tonight

Tonight: Mostly clear, with a low around 68. South southeast wind around 5 mph.
Low: 68 °F
Tuesday

Tuesday: Mostly sunny, with a high near 91. South wind 5 to 10 mph.
High: 91 °F
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 68. South wind around 5 mph.
Low: 68 °F
Wednesday

Wednesday: Sunny, with a high near 93. Heat index values as high as 97. South southwest wind 5 to 10 mph.
High: 93 °F
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 70. South wind around 5 mph.
Low: 70 °F
Thursday

Thursday: A 40 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 93. West southwest wind around 10 mph.
High: 93 °F
Thursday
Night
Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 67. West northwest wind around 5 mph becoming calm.  Chance of precipitation is 70%.
Low: 67 °F
Friday

Friday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 89. Calm wind becoming south southwest around 5 mph.
High: 89 °F
Friday
Night
Friday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 66. Calm wind.
Low: 66 °F
Mostly Clear

Mostly Sunny

Mostly Clear

Sunny

Mostly Clear

Sunny then
Chance
T-storms
Showers
Likely

Chance
Showers then
Chance
T-storms
Slight Chance
T-storms

 

Tonight
 
Mostly clear, with a low around 68. South southeast wind around 5 mph.
Tuesday
 
Mostly sunny, with a high near 91. South wind 5 to 10 mph.
Tuesday Night
 
Mostly clear, with a low around 68. South wind around 5 mph.
Wednesday
 
Sunny, with a high near 93. Heat index values as high as 97. South southwest wind 5 to 10 mph.
Wednesday Night
 
Mostly clear, with a low around 70. South wind around 5 mph.
Thursday
 
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. West southwest wind around 10 mph.
Thursday Night
 
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. West northwest wind around 5 mph becoming calm. Chance of precipitation is 70%.
Friday
 
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Calm wind becoming south southwest around 5 mph.
Friday Night
 
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. Calm wind.
Saturday
 
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Saturday Night
 
A 20 percent chance of showers. Partly cloudy, with a low around 66.
Sunday
 
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
Sunday Night
 
Mostly clear, with a low around 65.
Monday
 
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.

 

Forecast from NOAA-NWS for Watertown TN.