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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 5:56 am CDT Sep 12, 2026
 
Today

Today: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. Southwest wind around 5 mph. New rainfall amounts between a quarter and half of an inch possible.
High: 87 °F		 Tonight

Tonight: Patchy fog after 8pm. Otherwise, mostly clear, with a low around 66. Calm wind.
Low: 66 °F		 Sunday

Sunday: Areas of fog before 9am. Otherwise, sunny, with a high near 91. Heat index values as high as 97. Calm wind becoming north around 5 mph in the afternoon.
High: 91 °F		 Sunday
Night
Sunday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 67. Calm wind.
Low: 67 °F		 Monday

Monday: Patchy fog before 8am. Otherwise, sunny, with a high near 92. Calm wind becoming north northeast around 5 mph in the afternoon.
High: 92 °F		 Monday
Night
Monday Night: Mostly clear, with a low around 67. Northeast wind around 5 mph becoming calm after midnight.
Low: 67 °F		 Tuesday

Tuesday: Sunny, with a high near 95. Calm wind becoming south around 5 mph.
High: 95 °F		 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 71. South wind around 5 mph.
Low: 71 °F		 Wednesday

Wednesday: Sunny, with a high near 94. South wind around 5 mph becoming calm in the afternoon.
High: 94 °F
Chance
T-storms
 Patchy Fog

 Areas Fog
then Sunny
 Mostly Clear
then Patchy
Fog
 Patchy Fog
then Sunny
 Mostly Clear

 Sunny

 Mostly Clear

 Sunny

 

Today
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. Southwest wind around 5 mph. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
 Patchy fog after 8pm. Otherwise, mostly clear, with a low around 66. Calm wind.
Sunday
 
 Areas of fog before 9am. Otherwise, sunny, with a high near 91. Heat index values as high as 97. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
 
 Patchy fog after 4am. Otherwise, mostly clear, with a low around 67. Calm wind.
Monday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 92. Calm wind becoming north northeast around 5 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 67. Northeast wind around 5 mph becoming calm after midnight.
Tuesday
 
 Sunny, with a high near 95. Calm wind becoming south around 5 mph.
Tuesday Night
 
 Mostly clear, with a low around 71. South wind around 5 mph.
Wednesday
 
 Sunny, with a high near 94. South wind around 5 mph becoming calm in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 69.
Thursday
 
 Sunny, with a high near 94.
Thursday Night
 
 Mostly clear, with a low around 67.
Friday
 
 Mostly sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.