Alpharetta, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alpharetta, a city in Fulton County, Georgia.
Tonight
72°F
Chance Showers And Thunderstorms then Partly Cloudy
A chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 72. Heat index values as high as 99. North wind 0 to 5 mph. Chance of precipitation is 30%.
7-day forecast for Alpharetta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph N | 27% |
| Saturday | 94°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph NE | 36% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 mph NE | 53% |
| Sunday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 33% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 33% |
| Monday | 91°F | Sunny then Chance Showers And Thunderstorms | 0 mph | 51% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 0 mph | 51% |
| Tuesday | 86°F | Showers And Thunderstorms Likely | 5 mph E | 63% |
| Tuesday Night | 67°F | Showers And Thunderstorms Likely | 5 to 10 mph E | 63% |
| Wednesday | 81°F | Chance Showers And Thunderstorms | 10 mph NE | 35% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 35% |
| Thursday | 80°F | Mostly Sunny | 10 mph NE | 8% |
| Thursday Night | 62°F | Partly Cloudy | 5 to 10 mph N | 8% |
| Friday | 81°F | Mostly Sunny | 5 mph N | 8% |
Forecast source: National Weather Service (api.weather.gov) for Alpharetta (34.071, -84.273). Updated through the day.
Growing snapshot for Alpharetta
Last spring frost
Mar 25
First fall frost
Nov 9
Growing season
228 days
Hardiness zone
8a
More local growing data for Alpharetta: nearby ZIP 30009 weather · frost dates · planting calendar · Georgia frost dates
Nearby towns & communities
Atlanta
Chattahoochee Hills
College Park
Duluth
East Point
Fairburn
Hapeville
Johns Creek
Milton
Mountain Park
Palmetto
Roswell
Sandy Springs
South Fulton
Union City
Climate data from the nearest NOAA station, Atlanta Peachtree Ap, Ga (14 mi from Alpharetta). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.