National Weather Service Forecast for: Alabaster AL
Issued by: National Weather Service Birmingham, AL
Updated: 1:26 am CDT Aug 20, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 75. Calm wind.
Partly Cloudy

 Thursday

Thursday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 111. Calm wind becoming north around 5 mph.
Sunny then
Chance
T-storms
 Thursday
Night
Thursday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 73. Calm wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms
 Friday

Friday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming west around 5 mph in the afternoon.
Chance
T-storms
 Friday
Night
Friday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 71. Northwest wind around 5 mph becoming calm.
Slight Chance
T-storms
 Saturday

Saturday: Sunny, with a high near 95.
Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 71.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 94.
Sunny

 Sunday
Night
Sunday Night: Mostly clear, with a low around 71.
Mostly Clear
Lo 75 °F Hi 98 °F Lo 73 °F Hi 94 °F Lo 71 °F Hi 95 °F Lo 71 °F Hi 94 °F Lo 71 °F

Heat Advisory
 

Overnight
 
 Partly cloudy, with a low around 75. Calm wind.
Thursday
 
 A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 111. Calm wind becoming north around 5 mph.
Thursday Night
 
 A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 73. Calm wind. 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 94. Heat index values as high as 105. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 71. Northwest wind around 5 mph becoming calm.
Saturday
 
 Sunny, with a high near 95.
Saturday Night
 
 Mostly clear, with a low around 71.
Sunday
 
 Sunny, with a high near 94.
Sunday Night
 
 Mostly clear, with a low around 71.
Monday
 
 Mostly sunny, with a high near 93.
Monday Night
 
 Partly cloudy, with a low around 70.
Tuesday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 71.
Wednesday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

 

Forecast from NOAA-NWS for Alabaster AL.