National Weather Service Forecast for: Alpharetta GA
Issued by: National Weather Service Peachtree City, GA
Updated: 2:27 pm EDT Mar 19, 2026
 
Tonight

Tonight: Clear, with a low around 43. West wind around 5 mph becoming calm.
Clear
 Friday

Friday: Sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny
 Friday
Night
Friday Night: Partly cloudy, with a low around 53. West wind around 5 mph.
Partly Cloudy
 Saturday

Saturday: Mostly sunny, with a high near 81. West wind 5 to 10 mph, with gusts as high as 15 mph.
Mostly Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 57. West wind around 5 mph.
Mostly Clear
 Sunday

Sunday: Sunny, with a high near 85.
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 61.
Mostly Clear
 Monday

Monday: Mostly sunny, with a high near 79.
Mostly Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 49.
Mostly Clear
Lo 43 °F Hi 74 °F Lo 53 °F Hi 81 °F Lo 57 °F Hi 85 °F Lo 61 °F Hi 79 °F Lo 49 °F

 

Tonight
 
 Clear, with a low around 43. West wind around 5 mph becoming calm.
Friday
 
 Sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
 
 Partly cloudy, with a low around 53. West wind around 5 mph.
Saturday
 
 Mostly sunny, with a high near 81. West wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
 
 Mostly clear, with a low around 57. West wind around 5 mph.
Sunday
 
 Sunny, with a high near 85.
Sunday Night
 
 Mostly clear, with a low around 61.
Monday
 
 Mostly sunny, with a high near 79.
Monday Night
 
 Mostly clear, with a low around 49.
Tuesday
 
 Mostly sunny, with a high near 69.
Tuesday Night
 
 A 20 percent chance of showers. Mostly cloudy, with a low around 50.
Wednesday
 
 A 10 percent chance of showers. Partly sunny, with a high near 69.
Wednesday Night
 
 Partly cloudy, with a low around 52.
Thursday
 
 Mostly sunny, with a high near 79.

 

Forecast from NOAA-NWS for Alpharetta GA.