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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 7:16 am CDT Aug 21, 2026
 
This
Afternoon
This Afternoon: Mostly sunny, with a high near 87. North northwest wind around 5 mph.
High: 87 °F
Tonight

Tonight: Patchy fog after 1am.  Otherwise, mostly clear, with a low around 67. Calm wind.
Low: 67 °F
Saturday

Saturday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 89. Light and variable wind becoming northwest 5 to 10 mph in the afternoon.
High: 89 °F
Saturday
Night
Saturday Night: Mostly clear, with a low around 65. Northwest wind around 5 mph becoming calm  in the evening.
Low: 65 °F
Sunday

Sunday: Patchy fog before 8am.  Otherwise, sunny, with a high near 86. Calm wind becoming north northwest around 5 mph in the afternoon.
High: 86 °F
Sunday
Night
Sunday Night: Partly cloudy, with a low around 63. North wind around 5 mph becoming calm.
Low: 63 °F
Monday

Monday: Mostly sunny, with a high near 86. Calm wind becoming west northwest around 5 mph.
High: 86 °F
Monday
Night
Monday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 63. Calm wind.  Chance of precipitation is 30%.
Low: 63 °F
Tuesday

Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm.  Mostly sunny, with a high near 85. Calm wind becoming south southwest around 5 mph.
High: 85 °F
Mostly Sunny

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

Patchy Fog
then Sunny
Partly Cloudy

Mostly Sunny

Chance
Showers
Chance
T-storms

 

This Afternoon
 
Mostly sunny, with a high near 87. North northwest wind around 5 mph.
Tonight
 
Patchy fog after 1am. Otherwise, mostly clear, with a low around 67. Calm wind.
Saturday
 
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 89. Light and variable wind becoming northwest 5 to 10 mph in the afternoon.
Saturday Night
 
Mostly clear, with a low around 65. Northwest wind around 5 mph becoming calm in the evening.
Sunday
 
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming north northwest around 5 mph in the afternoon.
Sunday Night
 
Partly cloudy, with a low around 63. North wind around 5 mph becoming calm.
Monday
 
Mostly sunny, with a high near 86. Calm wind becoming west northwest around 5 mph.
Monday Night
 
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%.
Tuesday
 
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 85. Calm wind becoming south southwest around 5 mph.
Tuesday Night
 
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.
Wednesday
 
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Wednesday Night
 
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Thursday
 
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Watertown TN.