Decatur, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Decatur, a city in Dekalb County, Georgia.
Tonight
73°F
Chance Showers And Thunderstorms then Partly Cloudy
A chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 73. Heat index values as high as 98. West wind 0 to 5 mph. Chance of precipitation is 30%.
7-day forecast for Decatur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 28% |
| Saturday | 94°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph NE | 29% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 5 mph E | 48% |
| Sunday | 90°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 29% |
| Sunday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 29% |
| Monday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 46% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 0 mph | 47% |
| Tuesday | 88°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 58% |
| Tuesday Night | 69°F | Showers And Thunderstorms Likely | 5 to 10 mph E | 58% |
| Wednesday | 83°F | Chance Showers And Thunderstorms | 10 mph NE | 31% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 mph NE | 31% |
| Thursday | 81°F | Mostly Sunny | 10 mph NE | 6% |
| Thursday Night | 63°F | Partly Cloudy | 5 to 10 mph N | 6% |
| Friday | 82°F | Mostly Sunny | 5 mph N | 6% |
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 Sep 19, 2026.