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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 10:56 am CDT Jul 26, 2026
 
Today

Today: A slight chance of showers between noon and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Heat index values as high as 102. West northwest wind around 5 mph. Chance of precipitation is 20%.
High: 90 °F		 Tonight

Tonight: A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog before 4am, then patchy fog after 5am. Otherwise, increasing clouds, with a low around 73. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Low: 73 °F		 Monday

Monday: A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 93. Heat index values as high as 109. Calm wind becoming west around 5 mph. Chance of precipitation is 30%.
High: 93 °F		 Monday
Night
Monday Night: A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly clear, with a low around 75. Calm wind becoming southwest around 5 mph after midnight. Chance of precipitation is 20%.
Low: 75 °F		 Tuesday

Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. West southwest wind around 10 mph, with gusts as high as 20 mph.
High: 94 °F		 Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 71. Northwest wind 5 to 10 mph becoming light north after midnight. Chance of precipitation is 40%.
Low: 71 °F		 Wednesday

Wednesday: Mostly sunny, with a high near 87. North wind 5 to 10 mph.
High: 87 °F		 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 65. North wind around 5 mph becoming calm in the evening.
Low: 65 °F		 Thursday

Thursday: Sunny, with a high near 88. Calm wind becoming north northeast around 5 mph in the morning.
High: 88 °F
Slight Chance
T-storms

 Chance
T-storms then
Showers
Likely and
Patchy Fog
 Chance
T-storms and
Patchy Fog

 Slight Chance
T-storms then
Mostly Clear

 Mostly Sunny
then Chance
T-storms

 Chance
T-storms then
Chance
Showers
 Mostly Sunny


 Mostly Clear


 Sunny

Heat Advisory
 

Today
 
 A slight chance of showers between noon and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Heat index values as high as 102. West northwest wind around 5 mph. Chance of precipitation is 20%.
Tonight
 
 A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog before 4am, then patchy fog after 5am. Otherwise, increasing clouds, with a low around 73. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
 
 A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 93. Heat index values as high as 109. Calm wind becoming west around 5 mph. Chance of precipitation is 30%.
Monday Night
 
 A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly clear, with a low around 75. Calm wind becoming southwest around 5 mph after midnight. Chance of precipitation is 20%.
Tuesday
 
 A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. West southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
 
 A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 71. Northwest wind 5 to 10 mph becoming light north after midnight. Chance of precipitation is 40%.
Wednesday
 
 Mostly sunny, with a high near 87. North wind 5 to 10 mph.
Wednesday Night
 
 Mostly clear, with a low around 65. North wind around 5 mph becoming calm in the evening.
Thursday
 
 Sunny, with a high near 88. Calm wind becoming north northeast around 5 mph in the morning.
Thursday Night
 
 Partly cloudy, with a low around 66.
Friday
 
 Mostly sunny, with a high near 88.
Friday Night
 
 A 20 percent chance of showers. Partly cloudy, with a low around 69.
Saturday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Watertown TN.