National Weather Service Forecast for: Mountain Brook AL
Issued by: National Weather Service Birmingham, AL
Updated: 5:52 pm CDT Jun 18, 2026
 
Tonight

Tonight: A 20 percent chance of showers before 4am. Mostly cloudy, with a low around 70. West wind 5 to 10 mph.
Slight Chance
Showers

 Juneteenth

Juneteenth: 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. Partly sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Calm wind.
Mostly Cloudy
then Chance
Showers
 Saturday

Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 84. Calm wind. Chance of precipitation is 60%.
Showers
Likely

 Saturday
Night
Saturday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 69. Calm wind.
Mostly Cloudy
then Chance
Showers
 Sunday

Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 85. Chance of precipitation is 80%.
Chance
Showers then
T-storms
 Sunday
Night
Sunday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Chance
T-storms

 Monday

Monday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87.
Slight Chance
T-storms then
Chance
T-storms
 Monday
Night
Monday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Showers
Likely
Lo 70 °F Hi 84 °F Lo 68 °F Hi 84 °F Lo 69 °F Hi 85 °F Lo 72 °F Hi 87 °F Lo 70 °F

Flood Watch
 

Tonight
 
 A 20 percent chance of showers before 4am. Mostly cloudy, with a low around 70. West wind 5 to 10 mph.
Juneteenth
 
 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. Partly sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
 A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Calm wind.
Saturday
 
 Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 84. Calm wind. Chance of precipitation is 60%.
Saturday Night
 
 A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 69. Calm wind.
Sunday
 
 A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 85. Chance of precipitation is 80%.
Sunday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Monday
 
 A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87.
Monday Night
 
 Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Tuesday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Wednesday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Wednesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Mountain Brook AL.