Skip to main content.
National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 am CDT Jul 19, 2026
 
Today

Today: Showers and thunderstorms likely, mainly after 3pm. Mostly sunny, with a high near 89. Heat index values as high as 99. Calm wind becoming west northwest 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: 89 °F		 Tonight

Tonight: Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 11pm. Patchy fog before 1am, then patchy fog after 2am. Otherwise, partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Low: 71 °F		 Monday

Monday: A 40 percent chance of showers and thunderstorms after 1pm. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 90. Heat index values as high as 100. Calm wind becoming west around 5 mph.
High: 90 °F		 Monday
Night
Monday Night: Partly cloudy, with a low around 73. Calm wind becoming south around 5 mph.
Low: 73 °F		 Tuesday

Tuesday: A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 92. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
High: 92 °F		 Tuesday
Night
Tuesday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 74. South southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%.
Low: 74 °F		 Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. West wind 5 to 10 mph becoming north in the afternoon.
High: 87 °F		 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 65. North wind 5 to 10 mph.
Low: 65 °F		 Thursday

Thursday: Mostly sunny, with a high near 82. North northeast wind 5 to 10 mph.
High: 82 °F
Slight Chance
T-storms then
T-storms
Likely
 T-storms
Likely then
Patchy Fog
 Areas Fog
then Chance
T-storms
 Partly Cloudy

 Chance
Showers then
Chance
T-storms
 Showers
Likely

 Mostly Sunny
then Slight
Chance
T-storms
 Mostly Clear

 Mostly Sunny

 

Today
 
 Showers and thunderstorms likely, mainly after 3pm. Mostly sunny, with a high near 89. Heat index values as high as 99. Calm wind becoming west northwest 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.
Tonight
 
 Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 11pm. Patchy fog before 1am, then patchy fog after 2am. Otherwise, partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
 
 A 40 percent chance of showers and thunderstorms after 1pm. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 90. Heat index values as high as 100. Calm wind becoming west around 5 mph.
Monday Night
 
 Partly cloudy, with a low around 73. Calm wind becoming south around 5 mph.
Tuesday
 
 A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 92. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Tuesday Night
 
 Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 74. South southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%.
Wednesday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. West wind 5 to 10 mph becoming north in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 65. North wind 5 to 10 mph.
Thursday
 
 Mostly sunny, with a high near 82. North northeast wind 5 to 10 mph.
Thursday Night
 
 Partly cloudy, with a low around 64.
Friday
 
 Mostly sunny, with a high near 86.
Friday Night
 
 Partly cloudy, with a low around 68.
Saturday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Watertown TN.