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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.