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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Jul 24, 2026
 
Tonight

Tonight: A slight chance of showers and thunderstorms before 4am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 20%.
Low: 66 °F		 Saturday

Saturday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 85. Calm wind becoming south southwest around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
High: 85 °F		 Saturday
Night
Saturday Night: A chance of showers and thunderstorms. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 40%.
Low: 70 °F		 Sunday

Sunday: A 10 percent chance of showers before 7am. Areas of fog before 9am. Otherwise, mostly sunny, with a high near 89. Heat index values as high as 98. Calm wind becoming north northwest around 5 mph in the afternoon.
High: 89 °F		 Sunday
Night
Sunday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 70. Calm wind.
Low: 70 °F		 Monday

Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 93. Calm wind becoming west southwest around 5 mph in the afternoon.
High: 93 °F		 Monday
Night
Monday Night: Partly cloudy, with a low around 74. Calm wind becoming south southwest around 5 mph in the evening.
Low: 74 °F		 Tuesday

Tuesday: Mostly sunny, with a high near 94. South southwest wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
High: 94 °F		 Tuesday
Night
Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 73. West northwest wind around 5 mph becoming calm after midnight.
Low: 73 °F
Mostly Cloudy
then Slight
Chance
T-storms
 Chance
Showers then
Chance
T-storms
 Chance
T-storms then
Chance
Showers and
Patchy Fog
 Slight Chance
Showers and
Areas Fog
then Mostly
Sunny
 Mostly Clear
then Patchy
Fog

 Patchy Fog
then Mostly
Sunny

 Partly Cloudy


 Mostly Sunny


 Slight Chance
T-storms

 

Tonight
 
 A slight chance of showers and thunderstorms before 4am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 20%.
Saturday
 
 A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 85. Calm wind becoming south southwest around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 A chance of showers and thunderstorms. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 40%.
Sunday
 
 A 10 percent chance of showers before 7am. Areas of fog before 9am. Otherwise, mostly sunny, with a high near 89. Heat index values as high as 98. Calm wind becoming north northwest around 5 mph in the afternoon.
Sunday Night
 
 Patchy fog after 1am. Otherwise, mostly clear, with a low around 70. Calm wind.
Monday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 93. Calm wind becoming west southwest around 5 mph in the afternoon.
Monday Night
 
 Partly cloudy, with a low around 74. Calm wind becoming south southwest around 5 mph in the evening.
Tuesday
 
 Mostly sunny, with a high near 94. South southwest wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 73. West northwest wind around 5 mph becoming calm after midnight.
Wednesday
 
 Mostly sunny, with a high near 91.
Wednesday Night
 
 Partly cloudy, with a low around 69.
Thursday
 
 Mostly sunny, with a high near 90.
Thursday Night
 
 Partly cloudy, with a low around 69.
Friday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.

 

Forecast from NOAA-NWS for Watertown TN.