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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 5:36 am CDT Jul 5, 2026
 
Today

Today: A 50 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Mostly sunny, with a high near 92. Heat index values as high as 98. Calm wind becoming west around 5 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
High: 92 °F		 Tonight

Tonight: A 40 percent chance of showers and thunderstorms, mainly before midnight. Patchy fog between 3am and 4am. Otherwise, partly cloudy, with a low around 70. West southwest wind around 5 mph becoming calm.
Low: 70 °F		 Monday

Monday: Showers and thunderstorms likely, mainly after 5pm. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
High: 87 °F		 Monday
Night
Monday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 68. Calm wind.
Low: 68 °F		 Tuesday

Tuesday: A chance of showers, with thunderstorms also possible after 10am. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 30%.
High: 88 °F		 Tuesday
Night
Tuesday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 69. Calm wind.
Low: 69 °F		 Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, sunny, with a high near 90. Calm wind becoming west around 5 mph in the afternoon.
High: 90 °F		 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 70. Calm wind.
Low: 70 °F		 Thursday

Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. West southwest wind 5 to 10 mph.
High: 92 °F
Mostly Sunny
then Chance
T-storms

 Chance
T-storms and
Patchy Fog

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

 Chance
Showers and
Areas Fog
then Chance
T-storms
 Mostly Clear
then Patchy
Fog

 Patchy Fog
then Slight
Chance
T-storms
 Mostly Clear


 Sunny then
Slight Chance
T-storms

 

Today
 
 A 50 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Mostly sunny, with a high near 92. Heat index values as high as 98. Calm wind becoming west around 5 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 A 40 percent chance of showers and thunderstorms, mainly before midnight. Patchy fog between 3am and 4am. Otherwise, partly cloudy, with a low around 70. West southwest wind around 5 mph becoming calm.
Monday
 
 Showers and thunderstorms likely, mainly after 5pm. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before midnight. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 68. Calm wind.
Tuesday
 
 A chance of showers, with thunderstorms also possible after 10am. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 30%.
Tuesday Night
 
 Patchy fog after 4am. Otherwise, mostly clear, with a low around 69. Calm wind.
Wednesday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, sunny, with a high near 90. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 70. Calm wind.
Thursday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. West southwest wind 5 to 10 mph.
Thursday Night
 
 A chance of showers and thunderstorms. Mostly clear, with a low around 73. Chance of precipitation is 50%.
Friday
 
 Showers likely and possibly a thunderstorm. 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 70%.
Saturday
 
 Showers likely and possibly a thunderstorm. Partly sunny, with a high near 88. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Watertown TN.