NWS Forecast for Mountain Brook AL

National Weather Service Forecast for: Mountain Brook AL
Issued by: National Weather Service Birmingham, AL

Updated: 1:26 am CDT Aug 20, 2026

Today Mostly Sunny then Chance T-storms	Tonight Chance T-storms	Friday Chance T-storms	Friday Night Mostly Clear	Saturday Sunny	Saturday Night Mostly Clear	Sunday Sunny	Sunday Night Mostly Clear	Monday Mostly Sunny
Hi 96 °F	Lo 73 °F	Hi 91 °F	Lo 71 °F	Hi 92 °F	Lo 71 °F	Hi 91 °F	Lo 70 °F	Hi 90 °F

Heat Advisory

Today	A 30 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 96. Heat index values as high as 107. Calm wind becoming northwest around 5 mph in the afternoon.
Tonight	A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 73. South wind around 5 mph becoming calm. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday	A 40 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.
Friday Night	Mostly clear, with a low around 71. North wind around 5 mph becoming calm in the evening.
Saturday	Sunny, with a high near 92. Light north wind increasing to 5 to 10 mph in the afternoon.
Saturday Night	Mostly clear, with a low around 71.
Sunday	Sunny, with a high near 91.
Sunday Night	Mostly clear, with a low around 70.
Monday	Mostly sunny, with a high near 90.
Monday Night	Partly cloudy, with a low around 70.
Tuesday	A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Tuesday Night	A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Wednesday	A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

Forecast from NOAA-NWS for Mountain Brook AL.