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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 6:12 pm CDT May 18, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 71. South wind around 5 mph.
Low: 71 °F		 Tuesday

Tuesday: Mostly sunny, with a high near 89. South southwest wind around 10 mph, with gusts as high as 20 mph.
High: 89 °F		 Tuesday
Night
Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly between 1am and 5am. Increasing clouds, with a low around 67. Southwest wind around 5 mph becoming calm in the evening.
Low: 67 °F		 Wednesday

Wednesday: Showers and possibly a thunderstorm. High near 82. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 100%.
High: 82 °F		 Wednesday
Night
Wednesday Night: Showers likely and possibly a thunderstorm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 60%.
Low: 63 °F		 Thursday

Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. East northeast wind around 5 mph. Chance of precipitation is 70%.
High: 80 °F		 Thursday
Night
Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. East northeast wind around 5 mph becoming south southeast after midnight. Chance of precipitation is 70%.
Low: 64 °F		 Friday

Friday: Showers and possibly a thunderstorm. High near 82. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
High: 82 °F		 Friday
Night
Friday Night: Showers and possibly a thunderstorm. Low around 65. South wind 5 to 10 mph. Chance of precipitation is 80%.
Low: 65 °F
Partly Cloudy

 Mostly Sunny

 Chance
T-storms
 Showers

 Showers
Likely and
Patchy Fog
 Showers
Likely
 Showers
Likely
 Showers

 Showers

 

Tonight
 
 Partly cloudy, with a low around 71. South wind around 5 mph.
Tuesday
 
 Mostly sunny, with a high near 89. South southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
 
 A 40 percent chance of showers and thunderstorms, mainly between 1am and 5am. Increasing clouds, with a low around 67. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
 
 Showers and possibly a thunderstorm. High near 82. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 100%.
Wednesday Night
 
 Showers likely and possibly a thunderstorm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 60%.
Thursday
 
 A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. East northeast wind around 5 mph. Chance of precipitation is 70%.
Thursday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. East northeast wind around 5 mph becoming south southeast after midnight. Chance of precipitation is 70%.
Friday
 
 Showers and possibly a thunderstorm. High near 82. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Friday Night
 
 Showers and possibly a thunderstorm. Low around 65. South wind 5 to 10 mph. Chance of precipitation is 80%.
Saturday
 
 Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 80%.
Saturday Night
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Sunday
 
 Showers and thunderstorms likely. Partly sunny, with a high near 83. Chance of precipitation is 70%.
Sunday Night
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Memorial Day
 
 Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Chance of precipitation is 70%.

 

Forecast from NOAA-NWS for Watertown TN.