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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Jul 17, 2026
 
This
Afternoon
This Afternoon: Showers and thunderstorms likely. Mostly sunny, with a high near 89. West northwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
High: 89 °F		 Tonight

Tonight: A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 4am. Patchy fog before 1am, then patchy fog after 2am. Otherwise, partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 30%.
Low: 71 °F		 Saturday

Saturday: A 40 percent chance of showers and thunderstorms, mainly between 1pm and 3pm. Mostly sunny, with a high near 90. Heat index values as high as 99. Calm wind becoming west northwest around 5 mph in the morning.
High: 90 °F		 Saturday
Night
Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after midnight. Partly cloudy, with a low around 72. West wind around 5 mph becoming calm.
Low: 72 °F		 Sunday

Sunday: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 89. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 70%.
High: 89 °F		 Sunday
Night
Sunday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 71. Calm wind.
Low: 71 °F		 Monday

Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 90. Calm wind becoming west around 5 mph.
High: 90 °F		 Monday
Night
Monday Night: Mostly clear, with a low around 72. Calm wind becoming south around 5 mph.
Low: 72 °F		 Tuesday

Tuesday: Mostly sunny, with a high near 93. Southwest wind 5 to 10 mph.
High: 93 °F
T-storms
Likely

 Chance
T-storms and
Patchy Fog

 Chance
T-storms

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


 Patchy Fog
then Sunny

 Mostly Clear


 Mostly Sunny

 

This Afternoon
 
 Showers and thunderstorms likely. Mostly sunny, with a high near 89. West northwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 4am. Patchy fog before 1am, then patchy fog after 2am. Otherwise, partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 30%.
Saturday
 
 A 40 percent chance of showers and thunderstorms, mainly between 1pm and 3pm. Mostly sunny, with a high near 90. Heat index values as high as 99. Calm wind becoming west northwest around 5 mph in the morning.
Saturday Night
 
 A 50 percent chance of showers and thunderstorms, mainly after midnight. Partly cloudy, with a low around 72. West wind around 5 mph becoming calm.
Sunday
 
 A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 89. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 70%.
Sunday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 71. Calm wind.
Monday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 90. Calm wind becoming west around 5 mph.
Monday Night
 
 Mostly clear, with a low around 72. Calm wind becoming south around 5 mph.
Tuesday
 
 Mostly sunny, with a high near 93. Southwest wind 5 to 10 mph.
Tuesday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Wednesday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Wednesday Night
 
 Mostly clear, with a low around 64.
Thursday
 
 Mostly sunny, with a high near 82.
Thursday Night
 
 Mostly clear, with a low around 64.
Friday
 
 Mostly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Watertown TN.