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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 am CDT Aug 22, 2026
 
Overnight

Overnight: Patchy fog. Otherwise, mostly clear, with a low around 66. Calm wind.
Low: 66 °F		 Saturday

Saturday: Areas of fog before 8am. Otherwise, sunny, with a high near 90. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
High: 90 °F		 Saturday
Night
Saturday Night: Mostly clear, with a low around 63. Northwest wind around 5 mph becoming calm in the evening.
Low: 63 °F		 Sunday

Sunday: Sunny, with a high near 86. Light west northwest wind becoming northwest 5 to 10 mph in the afternoon.
High: 86 °F		 Sunday
Night
Sunday Night: Partly cloudy, with a low around 61. North wind around 5 mph becoming calm.
Low: 61 °F		 Monday

Monday: Mostly sunny, with a high near 85. Calm wind becoming north northwest around 5 mph.
High: 85 °F		 Monday
Night
Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63. Calm wind.
Low: 63 °F		 Tuesday

Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph. Chance of precipitation is 30%.
High: 87 °F		 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 67. Calm wind.
Low: 67 °F
Patchy Fog

 Areas Fog
then Sunny

 Mostly Clear

 Sunny

 Partly Cloudy

 Mostly Sunny

 Partly Cloudy
then Slight
Chance
Showers
 Chance
Showers

 Partly Cloudy

 

Overnight
 
 Patchy fog. Otherwise, mostly clear, with a low around 66. Calm wind.
Saturday
 
 Areas of fog before 8am. Otherwise, sunny, with a high near 90. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
 
 Mostly clear, with a low around 63. Northwest wind around 5 mph becoming calm in the evening.
Sunday
 
 Sunny, with a high near 86. Light west northwest wind becoming northwest 5 to 10 mph in the afternoon.
Sunday Night
 
 Partly cloudy, with a low around 61. North wind around 5 mph becoming calm.
Monday
 
 Mostly sunny, with a high near 85. Calm wind becoming north northwest around 5 mph.
Monday Night
 
 A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63. Calm wind.
Tuesday
 
 A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph. Chance of precipitation is 30%.
Tuesday Night
 
 Partly cloudy, with a low around 67. Calm wind.
Wednesday
 
 A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.
Wednesday Night
 
 A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
 
 A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Thursday Night
 
 A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 67.
Friday
 
 Sunny, with a high near 89.

 

Forecast from NOAA-NWS for Watertown TN.