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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 6:36 pm CDT Sep 11, 2026
 
Tonight

Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming south southwest in the evening. Chance of precipitation is 30%.
Low: 70 °F		 Saturday

Saturday: Showers and thunderstorms likely before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 87. South wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
High: 87 °F		 Saturday
Night
Saturday Night: A 30 percent chance of showers before 7pm. Patchy fog between 3am and 4am. Otherwise, partly cloudy, with a low around 66. Calm wind.
Low: 66 °F		 Sunday

Sunday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 91. Heat index values as high as 100. Calm wind becoming north northwest around 5 mph.
High: 91 °F		 Sunday
Night
Sunday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 66. Calm wind.
Low: 66 °F		 Monday

Monday: Patchy fog before 8am. Otherwise, sunny, with a high near 91. Calm wind becoming northeast around 5 mph in the afternoon.
High: 91 °F		 Monday
Night
Monday Night: Mostly clear, with a low around 66. Northeast wind around 5 mph becoming calm after midnight.
Low: 66 °F		 Tuesday

Tuesday: Sunny, with a high near 94. Calm wind becoming south southwest around 5 mph.
High: 94 °F		 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 69. South wind around 5 mph.
Low: 69 °F
Chance
T-storms
 Showers
Likely
 Chance
Showers then
Patchy Fog
 Patchy Fog
then Sunny
 Mostly Clear
then Patchy
Fog
 Patchy Fog
then Sunny
 Mostly Clear

 Sunny

 Mostly Clear

 

Tonight
 
 A chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming south southwest in the evening. Chance of precipitation is 30%.
Saturday
 
 Showers and thunderstorms likely before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 87. South wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 A 30 percent chance of showers before 7pm. Patchy fog between 3am and 4am. Otherwise, partly cloudy, with a low around 66. Calm wind.
Sunday
 
 Patchy fog before 10am. Otherwise, mostly sunny, with a high near 91. Heat index values as high as 100. Calm wind becoming north northwest around 5 mph.
Sunday Night
 
 Patchy fog after midnight. Otherwise, mostly clear, with a low around 66. Calm wind.
Monday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 91. Calm wind becoming northeast around 5 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 66. Northeast wind around 5 mph becoming calm after midnight.
Tuesday
 
 Sunny, with a high near 94. Calm wind becoming south southwest around 5 mph.
Tuesday Night
 
 Mostly clear, with a low around 69. South wind around 5 mph.
Wednesday
 
 Sunny, with a high near 93.
Wednesday Night
 
 Mostly clear, with a low around 70.
Thursday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.
Thursday Night
 
 A 20 percent chance of showers. Partly cloudy, with a low around 70.
Friday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.