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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Jul 16, 2026
 
This
Afternoon
This Afternoon: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Heat index values as high as 97. Southwest wind around 5 mph.
High: 89 °F		 Tonight

Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 72. Calm wind.
Low: 72 °F		 Friday

Friday: Showers and thunderstorms likely, mainly after 4pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Heat index values as high as 98. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
High: 89 °F		 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Patchy fog before 4am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 72. Calm wind.
Low: 72 °F		 Saturday

Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 89. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 80%.
High: 89 °F		 Saturday
Night
Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 72. West wind around 5 mph becoming calm. Chance of precipitation is 60%.
Low: 72 °F		 Sunday

Sunday: Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 89. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 60%.
High: 89 °F		 Sunday
Night
Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70. Calm wind.
Low: 70 °F		 Monday

Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. Calm wind becoming west around 5 mph.
High: 90 °F
Chance
T-storms

 Partly Cloudy
then Patchy
Fog

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

 Chance
T-storms then
Showers

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

 Mostly Sunny
then Slight
Chance
T-storms

 

This Afternoon
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Heat index values as high as 97. Southwest wind around 5 mph.
Tonight
 
 Patchy fog after 3am. Otherwise, partly cloudy, with a low around 72. Calm wind.
Friday
 
 Showers and thunderstorms likely, mainly after 4pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Heat index values as high as 98. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before midnight. Patchy fog before 4am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 72. Calm wind.
Saturday
 
 A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 89. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 80%.
Saturday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 72. West wind around 5 mph becoming calm. Chance of precipitation is 60%.
Sunday
 
 Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 89. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Sunday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70. Calm wind.
Monday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. Calm wind becoming west around 5 mph.
Monday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 72.
Tuesday
 
 A 20 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
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Watertown TN.