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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Sep 10, 2026
 
This
Afternoon
This Afternoon: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 98. Southwest wind around 5 mph.
High: 93 °F		 Tonight

Tonight: A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 4am. Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 69. South southwest wind around 5 mph becoming calm. Chance of precipitation is 20%.
Low: 69 °F		 Friday

Friday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 93. Heat index values as high as 101. Calm wind becoming southwest around 5 mph in the afternoon.
High: 93 °F		 Friday
Night
Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. North northwest wind around 5 mph becoming calm. Chance of precipitation is 30%.
Low: 69 °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 89. South southwest wind around 5 mph. Chance of precipitation is 90%.
High: 89 °F		 Saturday
Night
Saturday Night: A 20 percent chance of showers before 1am. Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 67. Calm wind.
Low: 67 °F		 Sunday

Sunday: Patchy fog before 9am. Otherwise, sunny, with a high near 91. Calm wind becoming west around 5 mph.
High: 91 °F		 Sunday
Night
Sunday Night: Mostly clear, with a low around 66. Calm wind.
Low: 66 °F		 Monday

Monday: Sunny, with a high near 91. Calm wind becoming north northeast around 5 mph in the afternoon.
High: 91 °F
Slight Chance
T-storms

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

 Mostly Clear

 Sunny

 

This Afternoon
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 98. Southwest wind around 5 mph.
Tonight
 
 A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 4am. Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 69. South southwest wind around 5 mph becoming calm. Chance of precipitation is 20%.
Friday
 
 A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 93. Heat index values as high as 101. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. North northwest 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 89. South southwest wind around 5 mph. Chance of precipitation is 90%.
Saturday Night
 
 A 20 percent chance of showers before 1am. Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 67. Calm wind.
Sunday
 
 Patchy fog before 9am. Otherwise, sunny, with a high near 91. Calm wind becoming west around 5 mph.
Sunday Night
 
 Mostly clear, with a low around 66. Calm wind.
Monday
 
 Sunny, with a high near 91. Calm wind becoming north northeast around 5 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 67.
Tuesday
 
 Sunny, with a high near 93.
Tuesday Night
 
 Mostly clear, with a low around 69.
Wednesday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.
Wednesday Night
 
 Mostly clear, with a low around 68.
Thursday
 
 A chance of showers and thunderstorms. Sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.