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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 am CDT Jul 3, 2026
 
Today

Today: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Increasing clouds and hot, with a high near 99. Heat index values as high as 109. Calm wind becoming north northeast around 5 mph in the afternoon.
High: 99 °F		 Tonight

Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 73. East wind around 5 mph becoming calm.
Low: 73 °F		 Independence
Day
Independence Day: A 30 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Patchy fog before 7am. Otherwise, sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming west northwest around 5 mph.
High: 96 °F		 Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms before 1am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 73. Calm wind.
Low: 73 °F		 Sunday

Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 94. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.
High: 94 °F		 Sunday
Night
Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. Calm wind.
Low: 72 °F		 Monday

Monday: Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 92. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 70%.
High: 92 °F		 Monday
Night
Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. Calm wind.
Low: 72 °F		 Tuesday

Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.
High: 90 °F
Sunny then
Chance
T-storms

 Chance
T-storms then
Mostly Clear

 Chance
T-storms and
Patchy Fog

 Chance
T-storms and
Patchy Fog

 Chance
T-storms and
Patchy Fog
then Showers
Likely
 Chance
T-storms

 Slight Chance
T-storms then
T-storms
Likely
 Chance
T-storms

 Showers
Likely

Extreme Heat Warning
Heat Advisory
 

Today
 
 A 40 percent chance of showers and thunderstorms, mainly after 3pm. Increasing clouds and hot, with a high near 99. Heat index values as high as 109. Calm wind becoming north northeast around 5 mph in the afternoon.
Tonight
 
 A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 73. East wind around 5 mph becoming calm.
Independence Day
 
 A 30 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Patchy fog before 7am. Otherwise, sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming west northwest around 5 mph.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms before 1am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 73. Calm wind.
Sunday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 94. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. Calm wind.
Monday
 
 Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 92. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 70%.
Monday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. Calm wind.
Tuesday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.
Tuesday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Wednesday
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Wednesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Thursday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.