Smyrna, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smyrna, a city in Cobb County, Georgia.
Today
87°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 2pm, then showers and thunderstorms likely. Partly sunny. High near 87, with temperatures falling to around 83 in the afternoon. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Smyrna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Chance Showers And Thunderstorms | 5 mph SE | 61% |
| Tonight | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph E | 56% |
| Wednesday | 87°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 73% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 46% |
| Thursday | 89°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 64% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 64% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 36% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 36% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 44% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 mph | 44% |
| 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 | 42% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 42% |
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 Aug 4, 2026.