Smyrna, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smyrna, a city in Cobb County, Georgia.
Today
94°F
Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 94. Heat index values as high as 100. Northeast wind 0 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Smyrna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 23% |
| Tonight | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph E | 31% |
| Sunday | 91°F | Mostly Sunny | 0 to 5 mph E | 10% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 18% |
| Monday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 27% |
| Monday Night | 70°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 59% |
| Tuesday | 87°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 65% |
| Tuesday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 to 10 mph E | 65% |
| Wednesday | 81°F | Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph E | 43% |
| Wednesday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 10 mph E | 33% |
| Thursday | 80°F | Mostly Sunny | 5 to 10 mph NE | 11% |
| Thursday Night | 63°F | Partly Cloudy | 5 to 10 mph NE | 11% |
| Friday | 80°F | Mostly Sunny | 5 mph N | 9% |
| Friday Night | 62°F | Partly Cloudy | 5 mph NE | 9% |
Forecast source: National Weather Service (api.weather.gov) for Smyrna (33.863, -84.516). Updated through the day.
Growing snapshot for Smyrna
Last spring frost
Mar 27
First fall frost
Nov 7
Growing season
225 days
Hardiness zone
8a
More local growing data for Smyrna: nearby ZIP 30080 weather · frost dates · planting calendar · Georgia frost dates
Nearby towns & communities
Acworth
Austell
Fair Oaks
Kennesaw
Kennesaw State University
Mableton
Marietta
Powder Springs
Vinings
Climate data from the nearest NOAA station, Mableton 1 N, Ga (4.7 mi from Smyrna). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.