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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Jul 1, 2026
 
This
Afternoon
This Afternoon: A 20 percent chance of showers and thunderstorms.  Sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind.
High: 98 °F
Tonight

Tonight: Mostly clear, with a low around 75. Calm wind.
Low: 75 °F
Thursday

Thursday: Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming north around 5 mph in the afternoon.
High: 99 °F
Thursday
Night
Thursday Night: Partly cloudy, with a low around 75. Calm wind.
Low: 75 °F
Friday

Friday: A 30 percent chance of showers and thunderstorms after 1pm.  Sunny and hot, with a high near 99. Calm wind becoming north northeast around 5 mph in the afternoon.
High: 99 °F
Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 73. North northeast wind around 5 mph becoming calm.
Low: 73 °F
Independence
Day
Independence Day: A 30 percent chance of showers and thunderstorms after 1pm.  Sunny and hot, with a high near 97. Calm wind becoming north northeast around 5 mph.
High: 97 °F
Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 74. Calm wind.
Low: 74 °F
Sunday

Sunday: A 50 percent chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 96. Calm wind becoming west around 5 mph in the afternoon.
High: 96 °F
Slight Chance
T-storms

Mostly Clear

Hot

Partly Cloudy

Sunny then
Chance
T-storms
Chance
T-storms then
Chance
Showers
Sunny then
Chance
T-storms
Chance
T-storms

Slight Chance
T-storms then
Chance
T-storms

Extreme Heat Warning
 

This Afternoon
 
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind.
Tonight
 
Mostly clear, with a low around 75. Calm wind.
Thursday
 
Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
 
Partly cloudy, with a low around 75. Calm wind.
Friday
 
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. Calm wind becoming north northeast around 5 mph in the afternoon.
Friday Night
 
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 73. North northeast wind around 5 mph becoming calm.
Independence Day
 
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Calm wind becoming north northeast around 5 mph.
Saturday Night
 
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74. Calm wind.
Sunday
 
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 96. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
 
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73.
Monday
 
Showers and thunderstorms likely. Mostly sunny, with a high near 94. Chance of precipitation is 60%.
Monday Night
 
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Tuesday
 
Showers and thunderstorms likely. Mostly sunny, with a high near 92. Chance of precipitation is 70%.

 

Forecast from NOAA-NWS for Watertown TN.