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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 am CDT Jul 9, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 68. Calm wind becoming south southwest around 5 mph.
Low: 68 °F		 Thursday

Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 89. Heat index values as high as 97. Southwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
High: 89 °F		 Thursday
Night
Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 71. South wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Low: 71 °F		 Friday

Friday: Showers and thunderstorms before noon, then a chance of showers and thunderstorms after 2pm. High near 88. Southwest wind 5 to 10 mph. Chance of precipitation is 80%.
High: 88 °F		 Friday
Night
Friday Night: Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 71. South southwest wind around 5 mph. Chance of precipitation is 70%.
Low: 71 °F		 Saturday

Saturday: Showers and possibly a thunderstorm. High near 86. West southwest wind 5 to 10 mph. Chance of precipitation is 90%.
High: 86 °F		 Saturday
Night
Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Patchy fog before 1am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 68. West wind around 5 mph becoming calm. Chance of precipitation is 60%.
Low: 68 °F		 Sunday

Sunday: A 50 percent chance of showers and thunderstorms. Patchy fog before 8am. Otherwise, partly sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.
High: 86 °F		 Sunday
Night
Sunday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. North northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Low: 68 °F
Partly Cloudy


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Flood Watch
 

Overnight
 
 Partly cloudy, with a low around 68. Calm wind becoming south southwest around 5 mph.
Thursday
 
 A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 89. Heat index values as high as 97. Southwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
 
 A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 71. South wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
 
 Showers and thunderstorms before noon, then a chance of showers and thunderstorms after 2pm. High near 88. Southwest wind 5 to 10 mph. Chance of precipitation is 80%.
Friday Night
 
 Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 71. South southwest wind around 5 mph. Chance of precipitation is 70%.
Saturday
 
 Showers and possibly a thunderstorm. High near 86. West southwest wind 5 to 10 mph. Chance of precipitation is 90%.
Saturday Night
 
 Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Patchy fog before 1am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 68. West wind around 5 mph becoming calm. Chance of precipitation is 60%.
Sunday
 
 A 50 percent chance of showers and thunderstorms. Patchy fog before 8am. Otherwise, partly sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. North northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Monday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Monday Night
 
 Mostly clear, with a low around 68.
Tuesday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 88.
Tuesday Night
 
 Mostly clear, with a low around 68.
Wednesday
 
 Sunny, with a high near 89.

 

Forecast from NOAA-NWS for Watertown TN.