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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 pm CDT Jul 3, 2026
 
This
Afternoon
This Afternoon: Showers and thunderstorms likely. Mostly sunny and hot, with a high near 99. Heat index values as high as 110. Northeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
High: 99 °F		 Tonight

Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 73. Calm wind.
Low: 73 °F		 Independence
Day
Independence Day: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming south around 5 mph.
High: 96 °F		 Saturday
Night
Saturday Night: A 50 percent chance of showers and thunderstorms, mainly before 11pm. Patchy fog before 2am, then patchy fog after 3am. Otherwise, partly cloudy, with a low around 72. West southwest wind around 5 mph becoming calm.
Low: 72 °F		 Sunday

Sunday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 94. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
High: 94 °F		 Sunday
Night
Sunday Night: A 40 percent chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 72. West southwest wind around 5 mph becoming calm.
Low: 72 °F		 Monday

Monday: A chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny, with a high near 91. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
High: 91 °F		 Monday
Night
Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 71. West southwest wind around 5 mph becoming calm. Chance of precipitation is 40%.
Low: 71 °F		 Tuesday

Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. Calm wind becoming west northwest around 5 mph in the afternoon.
High: 90 °F
T-storms
Likely

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

 Chance
T-storms

Special Weather Statement
Extreme Heat Warning
Heat Advisory
Severe Thunderstorm Warning
 

This Afternoon
 
 Showers and thunderstorms likely. Mostly sunny and hot, with a high near 99. Heat index values as high as 110. Northeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 A 30 percent chance of showers and thunderstorms, mainly before 7pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 73. Calm wind.
Independence Day
 
 A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming south around 5 mph.
Saturday Night
 
 A 50 percent chance of showers and thunderstorms, mainly before 11pm. Patchy fog before 2am, then patchy fog after 3am. Otherwise, partly cloudy, with a low around 72. West southwest wind around 5 mph becoming calm.
Sunday
 
 A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 94. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
Sunday Night
 
 A 40 percent chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 72. West southwest wind around 5 mph becoming calm.
Monday
 
 A chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny, with a high near 91. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
Monday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 71. West southwest wind around 5 mph becoming calm. Chance of precipitation is 40%.
Tuesday
 
 A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. Calm wind becoming west northwest around 5 mph in the afternoon.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70.
Wednesday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Wednesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Thursday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 91.

 

Forecast from NOAA-NWS for Watertown TN.