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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 5:56 am CDT Aug 9, 2026
 
Today

Today: A 30 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly sunny, with a high near 89. Heat index values as high as 97. Southwest wind around 5 mph.
High: 89 °F		 Tonight

Tonight: Partly cloudy, with a low around 72. South wind around 5 mph.
Low: 72 °F		 Monday

Monday: A 10 percent chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 10 mph.
High: 92 °F		 Monday
Night
Monday Night: Mostly clear, with a low around 73. South southwest wind around 5 mph.
Low: 73 °F		 Tuesday

Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. Southwest wind 5 to 10 mph.
High: 92 °F		 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 74. South southwest wind around 5 mph.
Low: 74 °F		 Wednesday

Wednesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92. Southwest wind 5 to 10 mph.
High: 92 °F		 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind around 5 mph.
Low: 73 °F		 Thursday

Thursday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91. West wind 5 to 10 mph.
High: 91 °F
Mostly Sunny
then Chance
T-storms
 Partly Cloudy

 Mostly Sunny
then Slight
Chance
T-storms
 Mostly Clear

 Sunny then
Slight Chance
T-storms
 Mostly Clear

 Slight Chance
T-storms then
Chance
T-storms
 Chance
T-storms

 Chance
T-storms

 

Today
 
 A 30 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly sunny, with a high near 89. Heat index values as high as 97. Southwest wind around 5 mph.
Tonight
 
 Partly cloudy, with a low around 72. South wind around 5 mph.
Monday
 
 A 10 percent chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 10 mph.
Monday Night
 
 Mostly clear, with a low around 73. South southwest wind around 5 mph.
Tuesday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. Southwest wind 5 to 10 mph.
Tuesday Night
 
 Mostly clear, with a low around 74. South southwest wind around 5 mph.
Wednesday
 
 A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92. Southwest wind 5 to 10 mph.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind around 5 mph.
Thursday
 
 A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91. West wind 5 to 10 mph.
Thursday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.
Friday
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Friday Night
 
 A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Saturday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.

 

Forecast from NOAA-NWS for Watertown TN.