Decatur, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Decatur, a city in Dekalb County, Georgia.
Today
87°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 10am and 2pm, then showers and thunderstorms likely between 2pm and 5pm, then showers and thunderstorms likely. Mostly sunny. High near 87, with temperatures falling to around 82 in the afternoon. Southeast wind 0 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Decatur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 65% |
| Tonight | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 54% |
| Wednesday | 87°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 71% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 38% |
| Thursday | 89°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 63% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 63% |
| Friday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 35% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 35% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 41% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 41% |
| Sunday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 46% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 46% |
| Monday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 40% |
| Monday Night | 73°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 40% |
Forecast source: National Weather Service (api.weather.gov) for Decatur (33.771, -84.296). Updated through the day.
Growing snapshot for Decatur
Last spring frost
Mar 25
First fall frost
Nov 9
Growing season
228 days
Hardiness zone
8a
More local growing data for Decatur: nearby ZIP 30030 weather · frost dates · planting calendar · Georgia frost dates
Nearby towns & communities
Avondale Estates
Belvedere Park
Brookhaven
Candler-McAfee
Chamblee
Clarkston
Conley
Doraville
Druid Hills
Dunwoody
Gresham Park
Lithonia
North Decatur
North Druid Hills
Panthersville
Pine Lake
Redan
Scottdale
Stone Mountain
Stonecrest
Tucker
Climate data from the nearest NOAA station, Atlanta Peachtree Ap, Ga (7.1 mi from Decatur). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.