National Weather Service Forecast for: Brentwood TN
Issued by: National Weather Service Nashville, TN
Updated: 1:31 am CDT Aug 20, 2026
 
Overnight

Overnight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 72. West southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Thursday

Thursday: Showers and thunderstorms likely, mainly before 1pm. Partly sunny, with a high near 90. Heat index values as high as 103. Southeast wind around 5 mph becoming west northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Chance
T-storms
 Thursday
Night
Thursday Night: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 70. West northwest wind around 5 mph becoming calm in the evening.
Chance
T-storms then
Mostly Cloudy
 Friday

Friday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 90. Heat index values as high as 98. Light northwest wind becoming north northwest 5 to 10 mph in the afternoon.
Patchy Fog
then Mostly
Sunny
 Friday
Night
Friday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 67. North northwest wind around 5 mph becoming calm in the evening.
Mostly Clear
then Patchy
Fog
 Saturday

Saturday: Patchy fog before 8am. Otherwise, sunny, with a high near 91. Light west northwest wind becoming northwest 5 to 10 mph in the afternoon.
Patchy Fog
then Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 68. North northwest wind around 5 mph becoming calm in the evening.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 88. North wind 5 to 10 mph.
Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 65. North wind around 5 mph becoming calm after midnight.
Partly Cloudy
Lo 72 °F Hi 90 °F Lo 70 °F Hi 90 °F Lo 67 °F Hi 91 °F Lo 68 °F Hi 88 °F Lo 65 °F

Severe Thunderstorm Watch
Special Weather Statement
 

Overnight
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 72. West southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
 
 Showers and thunderstorms likely, mainly before 1pm. Partly sunny, with a high near 90. Heat index values as high as 103. Southeast wind around 5 mph becoming west northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 70. West northwest wind around 5 mph becoming calm in the evening.
Friday
 
 Patchy fog before 7am. Otherwise, mostly sunny, with a high near 90. Heat index values as high as 98. Light northwest wind becoming north northwest 5 to 10 mph in the afternoon.
Friday Night
 
 Patchy fog after 4am. Otherwise, mostly clear, with a low around 67. North northwest wind around 5 mph becoming calm in the evening.
Saturday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 91. Light west northwest wind becoming northwest 5 to 10 mph in the afternoon.
Saturday Night
 
 Mostly clear, with a low around 68. North northwest wind around 5 mph becoming calm in the evening.
Sunday
 
 Sunny, with a high near 88. North wind 5 to 10 mph.
Sunday Night
 
 Partly cloudy, with a low around 65. North wind around 5 mph becoming calm after midnight.
Monday
 
 Mostly sunny, with a high near 87.
Monday Night
 
 A 20 percent chance of showers. Mostly clear, with a low around 65.
Tuesday
 
 A 20 percent chance of showers. Sunny, with a high near 89.
Tuesday Night
 
 A 20 percent chance of showers. Mostly clear, with a low around 68.
Wednesday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.

 

Forecast from NOAA-NWS for Brentwood TN.