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National Weather Service Forecast for: Watertown TN
Issued by: National Weather Service Nashville, TN
Updated: 7:26 am CDT Jul 27, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 92. Heat index values as high as 105. West northwest wind around 5 mph.
High: 92 °F
Tonight

Tonight: Partly cloudy, with a low around 75. Calm wind becoming south southwest around 5 mph after midnight.
Low: 75 °F
Tuesday

Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 3pm.  Mostly sunny, with a high near 94. Heat index values as high as 107. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
High: 94 °F
Tuesday
Night
Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm.  Partly cloudy, with a low around 70. North northwest wind around 5 mph.
Low: 70 °F
Wednesday

Wednesday: 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 northwest wind around 5 mph becoming calm  in the evening.
Low: 65 °F
Thursday

Thursday: Sunny, with a high near 86. Calm wind becoming north around 5 mph in the morning.
High: 86 °F
Thursday
Night
Thursday Night: Mostly clear, with a low around 65. North wind around 5 mph becoming calm.
Low: 65 °F
Friday

Friday: Mostly sunny, with a high near 88. Calm wind becoming southwest around 5 mph.
High: 88 °F
Sunny

Partly Cloudy

Mostly Sunny
then Chance
T-storms
Chance
T-storms then
Partly Cloudy
Sunny

Mostly Clear

Sunny

Mostly Clear

Mostly Sunny

Heat Advisory
 

This Afternoon
 
Sunny, with a high near 92. Heat index values as high as 105. West northwest wind around 5 mph.
Tonight
 
Partly cloudy, with a low around 75. Calm wind becoming south southwest around 5 mph after midnight.
Tuesday
 
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 94. Heat index values as high as 107. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
 
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 70. North northwest wind around 5 mph.
Wednesday
 
Sunny, with a high near 87. North wind 5 to 10 mph.
Wednesday Night
 
Mostly clear, with a low around 65. North northwest wind around 5 mph becoming calm in the evening.
Thursday
 
Sunny, with a high near 86. Calm wind becoming north around 5 mph in the morning.
Thursday Night
 
Mostly clear, with a low around 65. North wind around 5 mph becoming calm.
Friday
 
Mostly sunny, with a high near 88. Calm wind becoming southwest around 5 mph.
Friday Night
 
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 68.
Saturday
 
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Saturday Night
 
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Sunday
 
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Watertown TN.