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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Jun 30, 2026
 
This
Afternoon
This Afternoon: Mostly sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind.
High: 97 °F
Tonight

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

Wednesday: Sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind.
High: 98 °F
Wednesday
Night
Wednesday Night: A slight chance of showers and thunderstorms between 9pm and 10pm.  Mostly clear, with a low around 76. Calm wind.  Chance of precipitation is 20%.
Low: 76 °F
Thursday

Thursday: A 30 percent chance of showers and thunderstorms after 1pm.  Sunny and hot, with a high near 99. Calm wind becoming northeast around 5 mph in the afternoon.
High: 99 °F
Thursday
Night
Thursday Night: A 30 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 75. Northeast wind around 5 mph becoming calm.
Low: 75 °F
Friday

Friday: 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
Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 74. Calm wind.
Low: 74 °F
Independence
Day
Independence Day: A 30 percent chance of showers and thunderstorms.  Sunny, with a high near 96. Calm wind becoming north around 5 mph.
High: 96 °F
Hot

Mostly Clear

Hot

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

Chance
T-storms

Extreme Heat Warning
 

This Afternoon
 
Mostly sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind.
Tonight
 
Mostly clear, with a low around 75. Calm wind.
Wednesday
 
Sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind.
Wednesday Night
 
A slight chance of showers and thunderstorms between 9pm and 10pm. Mostly clear, with a low around 76. Calm wind. Chance of precipitation is 20%.
Thursday
 
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
 
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 75. Northeast wind around 5 mph becoming calm.
Friday
 
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.
Friday Night
 
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 74. Calm wind.
Independence Day
 
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 96. Calm wind becoming north around 5 mph.
Saturday Night
 
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 73.
Sunday
 
Showers and thunderstorms likely. Mostly sunny, with a high near 94. Chance of precipitation is 60%.
Sunday Night
 
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Monday
 
Showers and thunderstorms likely. Mostly sunny, with a high near 92. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Watertown TN.