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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 am CDT Apr 18, 2026
 
Today

Today: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3pm.  High near 80. South southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
High: 80 °F
Tonight

Tonight: Showers and possibly a thunderstorm before midnight, then a slight chance of showers between midnight and 2am.  Low around 41. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Low: 41 °F
Sunday

Sunday: Partly sunny, then gradually becoming sunny, with a high near 64. North wind 5 to 10 mph.
High: 64 °F
Sunday
Night
Sunday Night: Mostly clear, with a low around 41. West northwest wind around 5 mph becoming calm  in the evening.
Low: 41 °F
Monday

Monday: Sunny, with a high near 67. North northwest wind around 5 mph.
High: 67 °F
Monday
Night
Monday Night: Clear, with a low around 43. Calm wind.
Low: 43 °F
Tuesday

Tuesday: Sunny, with a high near 77. Southwest wind 5 to 10 mph.
High: 77 °F
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 52. South southwest wind around 5 mph.
Low: 52 °F
Wednesday

Wednesday: Sunny, with a high near 81. West southwest wind 5 to 10 mph.
High: 81 °F
Slight Chance
Showers then
Showers
Showers then
Slight Chance
Showers
Becoming
Sunny
Mostly Clear

Sunny

Clear

Sunny

Partly Cloudy

Sunny

 

Today
 
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. High near 80. South southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
 
Showers and possibly a thunderstorm before midnight, then a slight chance of showers between midnight and 2am. Low around 41. North northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
 
Partly sunny, then gradually becoming sunny, with a high near 64. North wind 5 to 10 mph.
Sunday Night
 
Mostly clear, with a low around 41. West northwest wind around 5 mph becoming calm in the evening.
Monday
 
Sunny, with a high near 67. North northwest wind around 5 mph.
Monday Night
 
Clear, with a low around 43. Calm wind.
Tuesday
 
Sunny, with a high near 77. Southwest wind 5 to 10 mph.
Tuesday Night
 
Partly cloudy, with a low around 52. South southwest wind around 5 mph.
Wednesday
 
Sunny, with a high near 81. West southwest wind 5 to 10 mph.
Wednesday Night
 
Mostly clear, with a low around 55.
Thursday
 
Sunny, with a high near 83.
Thursday Night
 
Partly cloudy, with a low around 60.
Friday
 
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.

 

Forecast from NOAA-NWS for Watertown TN.