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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:30 am CDT Jul 2, 2026
 
Overnight

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

Thursday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind becoming north northeast around 5 mph in the afternoon.
High: 98 °F		 Thursday
Night
Thursday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 75. Calm wind.
Low: 75 °F		 Friday

Friday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind becoming north northeast around 5 mph.
High: 98 °F		 Friday
Night
Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 74. South wind around 5 mph becoming calm. Chance of precipitation is 30%.
Low: 74 °F		 Independence
Day
Independence Day: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 97. Calm wind becoming north around 5 mph.
High: 97 °F		 Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 74. Calm wind.
Low: 74 °F		 Sunday

Sunday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. Calm wind becoming west around 5 mph.
High: 95 °F		 Sunday
Night
Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. Calm wind.
Low: 73 °F
Mostly Clear

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Extreme Heat Warning
 

Overnight
 
 Mostly clear, with a low around 75. Calm wind.
Thursday
 
 A 30 percent chance of showers and thunderstorms, mainly after 5pm. Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind becoming north northeast around 5 mph in the afternoon.
Thursday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 75. Calm wind.
Friday
 
 A 30 percent chance of showers and thunderstorms, mainly after 4pm. Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind becoming north northeast around 5 mph.
Friday Night
 
 A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 74. South wind around 5 mph becoming calm. Chance of precipitation is 30%.
Independence Day
 
 A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 97. 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 74. Calm wind.
Sunday
 
 A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. Calm wind becoming west around 5 mph.
Sunday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. Calm wind.
Monday
 
 A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94.
Monday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Tuesday
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Wednesday
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 91. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Watertown TN.