Smyrna, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smyrna, a city in Cobb County, Georgia.
Tonight
64°F
Chance Showers And Thunderstorms
A slight chance of rain showers before 1am, then a chance of showers and thunderstorms between 1am and 2am, then a slight chance of showers and thunderstorms between 2am and 3am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
7-day forecast for Smyrna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 64°F | Chance Showers And Thunderstorms | 10 to 15 mph SE | 35% |
| Wednesday | 73°F | Showers And Thunderstorms | 10 to 15 mph SE | 84% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 58% |
| Thursday | 76°F | Chance Rain Showers | 0 to 5 mph SW | 39% |
| Thursday Night | 56°F | Chance Rain Showers | 0 mph | 39% |
| Friday | 74°F | Chance Rain Showers | 0 to 10 mph NW | 34% |
| Friday Night | 49°F | Slight Chance Rain Showers then Mostly Clear | 5 mph NW | 18% |
| Saturday | 69°F | Sunny | 5 to 10 mph NW | 1% |
| Saturday Night | 44°F | Partly Cloudy | 5 to 10 mph NW | 2% |
| Sunday | 67°F | Mostly Sunny | 5 mph NW | 7% |
| Sunday Night | 43°F | Mostly Clear | 5 mph NW | 7% |
| Monday | 66°F | Sunny | 5 to 10 mph NW | 3% |
| Monday Night | 41°F | Mostly Clear | 5 mph NW | 2% |
| Tuesday | 68°F | Sunny | 5 to 10 mph NW | 1% |
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 Nov 4, 2026.