Skip to main content.
National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Sep 9, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 92. Heat index values as high as 99. South southwest wind around 10 mph.
High: 92 °F		 Tonight

Tonight: Mostly clear, with a low around 71. South southwest wind around 5 mph.
Low: 71 °F		 Thursday

Thursday: A slight chance of showers between 11am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Heat index values as high as 100. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
High: 93 °F		 Thursday
Night
Thursday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers after 3am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 69. South southwest wind around 5 mph becoming calm. Chance of precipitation is 30%.
Low: 69 °F		 Friday

Friday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 91. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 60%.
High: 91 °F		 Friday
Night
Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. East wind around 5 mph becoming calm. Chance of precipitation is 30%.
Low: 68 °F		 Saturday

Saturday: 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 90. Southwest wind around 5 mph. Chance of precipitation is 80%.
High: 90 °F		 Saturday
Night
Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 40%.
Low: 67 °F		 Sunday

Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph.
High: 91 °F
Sunny

 Mostly Clear

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

 Chance
Showers then
Showers
 Chance
T-storms

 Mostly Sunny
then Slight
Chance
T-storms

 

This Afternoon
 
 Sunny, with a high near 92. Heat index values as high as 99. South southwest wind around 10 mph.
Tonight
 
 Mostly clear, with a low around 71. South southwest wind around 5 mph.
Thursday
 
 A slight chance of showers between 11am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Heat index values as high as 100. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Thursday Night
 
 A chance of showers and thunderstorms before 2am, then a slight chance of showers after 3am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 69. South southwest wind around 5 mph becoming calm. Chance of precipitation is 30%.
Friday
 
 Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 91. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. East wind around 5 mph becoming calm. Chance of precipitation is 30%.
Saturday
 
 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 90. Southwest wind around 5 mph. Chance of precipitation is 80%.
Saturday Night
 
 A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 40%.
Sunday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph.
Sunday Night
 
 Mostly clear, with a low around 67.
Monday
 
 Sunny, with a high near 93.
Monday Night
 
 Mostly clear, with a low around 69.
Tuesday
 
 A 30 percent chance of showers and thunderstorms. Sunny, with a high near 93.

 

Forecast from NOAA-NWS for Watertown TN.