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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 10:26 pm CDT Aug 20, 2026
 
Overnight

Overnight: A 20 percent chance of showers before 2am. Patchy fog. Otherwise, mostly cloudy, with a low around 69. Calm wind.
Low: 69 °F		 Friday

Friday: A 30 percent chance of showers and thunderstorms, mainly before 3pm. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.
High: 87 °F		 Friday
Night
Friday Night: 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, sunny, with a high near 88. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon.
High: 88 °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 20 percent chance of showers after 1am. Partly cloudy, with a low around 62. North wind around 5 mph becoming calm.
Low: 62 °F
Slight Chance
Showers and
Patchy Fog
 Patchy Fog
then Chance
T-storms
 Partly Cloudy
then Patchy
Fog
 Areas Fog
then Sunny

 Mostly Clear

 Patchy Fog
then Sunny

 Partly Cloudy

 Mostly Sunny

 Partly Cloudy
then Slight
Chance
Showers

 

Overnight
 
 A 20 percent chance of showers before 2am. Patchy fog. Otherwise, mostly cloudy, with a low around 69. Calm wind.
Friday
 
 A 30 percent chance of showers and thunderstorms, mainly before 3pm. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
 
 Patchy fog after 1am. Otherwise, mostly clear, with a low around 67. Calm wind.
Saturday
 
 Areas of fog before 9am. Otherwise, sunny, with a high near 88. Light and variable wind becoming west 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 20 percent chance of showers after 1am. Partly cloudy, with a low around 62. North wind around 5 mph becoming calm.
Tuesday
 
 A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 88.
Tuesday Night
 
 A 20 percent chance of showers. Partly cloudy, with a low around 66.
Wednesday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.

 

Forecast from NOAA-NWS for Watertown TN.