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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 11:11 pm CDT Aug 4, 2026
 
Overnight

Overnight: A 20 percent chance of showers before 2am. Mostly clear, with a low around 69. Calm wind.
Low: 69 °F		 Wednesday

Wednesday: A 30 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Mostly sunny, with a high near 89. Heat index values as high as 97. Calm wind becoming southwest around 5 mph.
High: 89 °F		 Wednesday
Night
Wednesday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 70. Calm wind becoming south around 5 mph.
Low: 70 °F		 Thursday

Thursday: A 20 percent chance of showers and thunderstorms after 3pm. Patchy fog before 7am. Otherwise, sunny, with a high near 91. Heat index values as high as 98. South southwest wind around 5 mph.
High: 91 °F		 Thursday
Night
Thursday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 72. South southeast wind around 5 mph.
Low: 72 °F		 Friday

Friday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South southwest wind around 5 mph.
High: 91 °F		 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 71. South wind around 5 mph.
Low: 71 °F		 Saturday

Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind around 5 mph.
High: 90 °F		 Saturday
Night
Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70. Calm wind.
Low: 70 °F
Slight Chance
Showers

 Chance
T-storms

 Slight Chance
T-storms then
Mostly Clear
 Patchy Fog
then Slight
Chance
T-storms
 Slight Chance
T-storms then
Partly Cloudy
 Mostly Sunny
then Chance
T-storms
 Chance
T-storms then
Chance
Showers
 Chance
T-storms

 Slight Chance
T-storms

 

Overnight
 
 A 20 percent chance of showers before 2am. Mostly clear, with a low around 69. Calm wind.
Wednesday
 
 A 30 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Mostly sunny, with a high near 89. Heat index values as high as 97. Calm wind becoming southwest around 5 mph.
Wednesday Night
 
 A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 70. Calm wind becoming south around 5 mph.
Thursday
 
 A 20 percent chance of showers and thunderstorms after 3pm. Patchy fog before 7am. Otherwise, sunny, with a high near 91. Heat index values as high as 98. South southwest wind around 5 mph.
Thursday Night
 
 A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 72. South southeast wind around 5 mph.
Friday
 
 A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South southwest wind around 5 mph.
Friday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 71. South wind around 5 mph.
Saturday
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind around 5 mph.
Saturday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70. Calm wind.
Sunday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.
Sunday Night
 
 Partly cloudy, with a low around 72.
Monday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Monday Night
 
 Partly cloudy, with a low around 73.
Tuesday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.