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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 am CDT Jul 11, 2026
 
Overnight

Overnight: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Low: 70 °F		 Saturday

Saturday: Showers and thunderstorms. High near 88. Heat index values as high as 98. West wind 5 to 10 mph becoming south southwest in the morning. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
High: 88 °F		 Saturday
Night
Saturday Night: Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 69. South southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Low: 69 °F		 Sunday

Sunday: Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. High near 83. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 80%.
High: 83 °F		 Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Low: 68 °F		 Monday

Monday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 83. East northeast wind around 5 mph. Chance of precipitation is 80%.
High: 83 °F		 Monday
Night
Monday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 68. East northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Low: 68 °F		 Tuesday

Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the morning.
High: 86 °F		 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 69. East southeast wind around 5 mph becoming calm.
Low: 69 °F
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Flood Watch
 

Overnight
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
 
 Showers and thunderstorms. High near 88. Heat index values as high as 98. West wind 5 to 10 mph becoming south southwest in the morning. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
 
 Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 69. South southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
 
 Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. High near 83. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 80%.
Sunday Night
 
 Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Monday
 
 A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 83. East northeast wind around 5 mph. Chance of precipitation is 80%.
Monday Night
 
 A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 68. East northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday
 
 A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the morning.
Tuesday Night
 
 Partly cloudy, with a low around 69. East southeast wind around 5 mph becoming calm.
Wednesday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.
Wednesday Night
 
 A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 71.
Thursday
 
 A 40 percent chance of showers and thunderstorms. Sunny, with a high near 90.
Thursday Night
 
 Mostly clear, with a low around 71.
Friday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

 

Forecast from NOAA-NWS for Watertown TN.