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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 5:36 am CDT Aug 1, 2026
 
Today

Today: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. High near 88. Heat index values as high as 97. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
High: 88 °F		 Tonight

Tonight: Showers likely and possibly a thunderstorm before 7pm, then a slight chance of showers and thunderstorms between 7pm and 8pm. Increasing clouds, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Low: 68 °F		 Sunday

Sunday: A slight chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 82. South southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
High: 82 °F		 Sunday
Night
Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 67. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Low: 67 °F		 Monday

Monday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. Calm wind becoming northwest around 5 mph in the morning. Chance of precipitation is 60%.
High: 82 °F		 Monday
Night
Monday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Patchy fog after midnight. Otherwise, partly cloudy, with a low around 66. North wind around 5 mph becoming calm. Chance of precipitation is 20%.
Low: 66 °F		 Tuesday

Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85. Calm wind becoming west northwest around 5 mph in the afternoon.
High: 85 °F		 Tuesday
Night
Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68. Calm wind.
Low: 68 °F		 Wednesday

Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Calm wind becoming west southwest around 5 mph.
High: 88 °F
Showers
Likely then
T-storms

 Showers
Likely then
Partly Cloudy

 Slight Chance
Showers then
Showers
Likely
 Chance
Showers

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

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

 Mostly Sunny
then Chance
Showers

 

Today
 
 Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. High near 88. Heat index values as high as 97. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 Showers likely and possibly a thunderstorm before 7pm, then a slight chance of showers and thunderstorms between 7pm and 8pm. Increasing clouds, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
 
 A slight chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 82. South southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
 
 A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 67. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Monday
 
 A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. Calm wind becoming northwest around 5 mph in the morning. Chance of precipitation is 60%.
Monday Night
 
 A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Patchy fog after midnight. Otherwise, partly cloudy, with a low around 66. North wind around 5 mph becoming calm. Chance of precipitation is 20%.
Tuesday
 
 A 50 percent chance of showers and thunderstorms, mainly after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85. Calm wind becoming west northwest around 5 mph in the afternoon.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68. Calm wind.
Wednesday
 
 A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Calm wind becoming west southwest around 5 mph.
Wednesday Night
 
 Mostly clear, with a low around 70.
Thursday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
Thursday Night
 
 Mostly clear, with a low around 71.
Friday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.