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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Jul 4, 2026
 
Tonight

Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 71. Calm wind.
Low: 71 °F		 Sunday

Sunday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 91. Heat index values as high as 101. Calm wind becoming west around 5 mph in the afternoon.
High: 91 °F		 Sunday
Night
Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 3am. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 71. Calm wind.
Low: 71 °F		 Monday

Monday: Showers and thunderstorms likely, mainly between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 90. Heat index values as high as 98. Calm wind becoming west northwest around 5 mph in the afternoon. Chance of precipitation is 60%.
High: 90 °F		 Monday
Night
Monday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 70. North wind around 5 mph becoming calm. Chance of precipitation is 30%.
Low: 70 °F		 Tuesday

Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 90. Calm wind becoming north northwest around 5 mph in the afternoon.
High: 90 °F		 Tuesday
Night
Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70. North wind around 5 mph becoming calm.
Low: 70 °F		 Wednesday

Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming west northwest around 5 mph.
High: 91 °F		 Wednesday
Night
Wednesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 20%.
Low: 71 °F
Chance
T-storms and
Patchy Fog

 Chance
T-storms and
Patchy Fog

 Chance
T-storms and
Patchy Fog

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

 Areas Fog
then Chance
T-storms

 Slight Chance
T-storms

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

 

Tonight
 
 A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 71. Calm wind.
Sunday
 
 A 40 percent chance of showers and thunderstorms, mainly after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 91. Heat index values as high as 101. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 3am. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 71. Calm wind.
Monday
 
 Showers and thunderstorms likely, mainly between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 90. Heat index values as high as 98. Calm wind becoming west northwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Monday Night
 
 A chance of showers and thunderstorms before 1am, then a slight chance of showers. Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 70. North wind around 5 mph becoming calm. Chance of precipitation is 30%.
Tuesday
 
 A 40 percent chance of showers and thunderstorms after 1pm. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 90. Calm wind becoming north northwest around 5 mph in the afternoon.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70. North wind around 5 mph becoming calm.
Wednesday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming west northwest around 5 mph.
Wednesday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 20%.
Thursday
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 90. Chance of precipitation is 70%.
Friday Night
 
 Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 71. Chance of precipitation is 60%.
Saturday
 
 Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Watertown TN.