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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 6:41 pm CDT Jul 15, 2026
 
Overnight

Overnight: Patchy fog before 3am, then patchy fog after 4am. Otherwise, mostly clear, with a low around 71. Calm wind.
Low: 71 °F		 Thursday

Thursday: A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming south southwest around 5 mph.
High: 88 °F		 Thursday
Night
Thursday Night: A 30 percent chance of showers and thunderstorms before 7pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 72. Calm wind.
Low: 72 °F		 Friday

Friday: Showers and thunderstorms likely after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Heat index values as high as 98. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
High: 89 °F		 Friday
Night
Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Patchy fog after 1am. Otherwise, partly cloudy, with a low around 71. West wind around 5 mph becoming calm. Chance of precipitation is 30%.
Low: 71 °F		 Saturday

Saturday: A chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny, with a high near 89. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 70%.
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: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.
High: 89 °F		 Sunday
Night
Sunday Night: Partly cloudy, with a low around 70. Calm wind.
Low: 70 °F
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 Partly Cloudy

 

Overnight
 
 Patchy fog before 3am, then patchy fog after 4am. Otherwise, mostly clear, with a low around 71. Calm wind.
Thursday
 
 A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming south southwest around 5 mph.
Thursday Night
 
 A 30 percent chance of showers and thunderstorms before 7pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 72. Calm wind.
Friday
 
 Showers and thunderstorms likely after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Heat index values as high as 98. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
Friday Night
 
 A chance of showers and thunderstorms before 1am, then a slight chance of showers. Patchy fog after 1am. Otherwise, partly cloudy, with a low around 71. West wind around 5 mph becoming calm. Chance of precipitation is 30%.
Saturday
 
 A chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny, with a high near 89. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 70%.
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
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
 
 Partly cloudy, with a low around 70. Calm wind.
Monday
 
 Mostly sunny, with a high near 90.
Monday Night
 
 Mostly clear, with a low around 72.
Tuesday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Wednesday
 
 Mostly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Watertown TN.