National Weather Service Forecast for: Gallatin TN
Issued by: National Weather Service Nashville, TN
Updated: 3:21 pm CDT Sep 12, 2026
 
Tonight

Tonight: Patchy fog after 10pm. Otherwise, mostly clear, with a low around 67. West northwest wind around 5 mph becoming calm.
Patchy Fog

 Sunday

Sunday: Areas of fog before 9am. Otherwise, sunny, with a high near 93. Heat index values as high as 98. Calm wind becoming northwest around 5 mph.
Areas Fog
then Sunny
 Sunday
Night
Sunday Night: Patchy fog before 2am, then patchy fog after 3am. Otherwise, partly cloudy, with a low around 69. Calm wind.
Partly Cloudy
then Patchy
Fog
 Monday

Monday: Mostly sunny, with a high near 91. Heat index values as high as 97. Northeast wind around 5 mph.
Mostly Sunny

 Monday
Night
Monday Night: Mostly clear, with a low around 67. Northeast wind around 5 mph becoming calm after midnight.
Mostly Clear

 Tuesday

Tuesday: Sunny and hot, with a high near 97. Calm wind becoming south around 5 mph.
Hot

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 72. South wind around 5 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 96. South southwest wind around 5 mph becoming calm in the afternoon.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 71. Calm wind.
Mostly Clear
Lo 67 °F Hi 93 °F Lo 69 °F Hi 91 °F Lo 67 °F Hi 97 °F Lo 72 °F Hi 96 °F Lo 71 °F

 

Tonight
 
 Patchy fog after 10pm. Otherwise, mostly clear, with a low around 67. West northwest wind around 5 mph becoming calm.
Sunday
 
 Areas of fog before 9am. Otherwise, sunny, with a high near 93. Heat index values as high as 98. Calm wind becoming northwest around 5 mph.
Sunday Night
 
 Patchy fog before 2am, then patchy fog after 3am. Otherwise, partly cloudy, with a low around 69. Calm wind.
Monday
 
 Mostly sunny, with a high near 91. Heat index values as high as 97. Northeast wind around 5 mph.
Monday Night
 
 Mostly clear, with a low around 67. Northeast wind around 5 mph becoming calm after midnight.
Tuesday
 
 Sunny and hot, with a high near 97. Calm wind becoming south around 5 mph.
Tuesday Night
 
 Mostly clear, with a low around 72. South wind around 5 mph.
Wednesday
 
 Sunny, with a high near 96. South southwest wind around 5 mph becoming calm in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 71. Calm wind.
Thursday
 
 Sunny, with a high near 96.
Thursday Night
 
 Mostly clear, with a low around 69.
Friday
 
 Mostly sunny, with a high near 93.
Friday Night
 
 Mostly clear, with a low around 67.
Saturday
 
 Sunny, with a high near 91.

 

Forecast from NOAA-NWS for Gallatin TN.