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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Aug 14, 2026
 
This
Afternoon
This Afternoon: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 95. Heat index values as high as 103. West southwest wind around 5 mph.
High: 95 °F		 Tonight

Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 74. Calm wind.
Low: 74 °F		 Saturday

Saturday: Sunny, with a high near 96. Heat index values as high as 106. Calm wind becoming west around 5 mph.
High: 96 °F		 Saturday
Night
Saturday Night: Mostly clear, with a low around 74. Calm wind becoming south around 5 mph.
Low: 74 °F		 Sunday

Sunday: Sunny and hot, with a high near 98. South southwest wind around 5 mph becoming west in the afternoon.
High: 98 °F		 Sunday
Night
Sunday Night: Mostly clear, with a low around 75. Calm wind becoming south southwest around 5 mph.
Low: 75 °F		 Monday

Monday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95. South southwest wind 5 to 10 mph becoming northwest in the afternoon.
High: 95 °F		 Monday
Night
Monday Night: Partly cloudy, with a low around 72. North northwest wind around 5 mph becoming calm in the evening.
Low: 72 °F		 Tuesday

Tuesday: Mostly sunny, with a high near 92. Calm wind becoming northwest around 5 mph in the afternoon.
High: 92 °F
Slight Chance
T-storms
 Slight Chance
T-storms then
Partly Cloudy
 Sunny

 Mostly Clear

 Hot

 Mostly Clear

 Sunny then
Chance
T-storms
 Partly Cloudy

 Mostly Sunny

Extreme Heat Warning
 

This Afternoon
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 95. Heat index values as high as 103. West southwest wind around 5 mph.
Tonight
 
 A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 74. Calm wind.
Saturday
 
 Sunny, with a high near 96. Heat index values as high as 106. Calm wind becoming west around 5 mph.
Saturday Night
 
 Mostly clear, with a low around 74. Calm wind becoming south around 5 mph.
Sunday
 
 Sunny and hot, with a high near 98. South southwest wind around 5 mph becoming west in the afternoon.
Sunday Night
 
 Mostly clear, with a low around 75. Calm wind becoming south southwest around 5 mph.
Monday
 
 A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95. South southwest wind 5 to 10 mph becoming northwest in the afternoon.
Monday Night
 
 Partly cloudy, with a low around 72. North northwest wind around 5 mph becoming calm in the evening.
Tuesday
 
 Mostly sunny, with a high near 92. Calm wind becoming northwest around 5 mph in the afternoon.
Tuesday Night
 
 A 20 percent chance of showers after 1am. Mostly clear, with a low around 70.
Wednesday
 
 Sunny, with a high near 94.
Wednesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Thursday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Thursday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Friday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 89.

 

Forecast from NOAA-NWS for Watertown TN.