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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Aug 7, 2026
 
This
Afternoon
This Afternoon: A 30 percent chance of showers and thunderstorms. Sunny, with a high near 90. Heat index values as high as 99. South southwest wind 5 to 10 mph.
High: 90 °F		 Tonight

Tonight: A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. South wind around 5 mph.
Low: 72 °F		 Saturday

Saturday: A 40 percent chance of showers and thunderstorms, mainly after 11am. Mostly sunny, with a high near 90. Heat index values as high as 99. South southwest wind around 5 mph.
High: 90 °F		 Saturday
Night
Saturday Night: A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. South southeast wind around 5 mph becoming calm.
Low: 72 °F		 Sunday

Sunday: A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 92. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.
High: 92 °F		 Sunday
Night
Sunday Night: Mostly clear, with a low around 72. Calm wind becoming south around 5 mph.
Low: 72 °F		 Monday

Monday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. Southwest wind around 5 mph.
High: 92 °F		 Monday
Night
Monday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 73. South wind around 5 mph.
Low: 73 °F		 Tuesday

Tuesday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Southwest wind around 5 mph.
High: 91 °F
Chance
T-storms

 Slight Chance
T-storms then
Partly Cloudy
 Chance
T-storms

 Slight Chance
T-storms then
Partly Cloudy
 Slight Chance
T-storms

 Mostly Clear

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

 

This Afternoon
 
 A 30 percent chance of showers and thunderstorms. Sunny, with a high near 90. Heat index values as high as 99. South southwest wind 5 to 10 mph.
Tonight
 
 A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. South wind around 5 mph.
Saturday
 
 A 40 percent chance of showers and thunderstorms, mainly after 11am. Mostly sunny, with a high near 90. Heat index values as high as 99. South southwest wind around 5 mph.
Saturday Night
 
 A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. South southeast wind around 5 mph becoming calm.
Sunday
 
 A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 92. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.
Sunday Night
 
 Mostly clear, with a low around 72. Calm wind becoming south around 5 mph.
Monday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. Southwest wind around 5 mph.
Monday Night
 
 A 20 percent chance of showers after 1am. Mostly clear, with a low around 73. South wind around 5 mph.
Tuesday
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Southwest wind around 5 mph.
Tuesday Night
 
 A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 72.
Wednesday
 
 Showers and thunderstorms likely. Partly sunny, with a high near 89. Chance of precipitation is 60%.
Wednesday Night
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Thursday
 
 Showers and thunderstorms likely. Mostly cloudy, with a high near 88. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Watertown TN.