Marietta, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a city in Cobb County, Georgia.
Tonight
63°F
Chance Showers And Thunderstorms
A slight chance of rain showers between 7pm and 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 63. Southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Chance Showers And Thunderstorms | 15 mph SE | 35% |
| Wednesday | 71°F | Showers And Thunderstorms | 10 to 15 mph SE | 85% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 59% |
| Thursday | 75°F | Chance Rain Showers | 0 to 5 mph W | 36% |
| Thursday Night | 55°F | Chance Rain Showers | 0 mph | 36% |
| Friday | 73°F | Chance Rain Showers | 5 to 10 mph NW | 32% |
| Friday Night | 48°F | Slight Chance Rain Showers then Mostly Clear | 5 mph NW | 16% |
| Saturday | 67°F | Sunny | 5 to 10 mph NW | 0% |
| Saturday Night | 43°F | Partly Cloudy | 5 to 10 mph NW | 2% |
| Sunday | 65°F | Mostly Sunny | 5 mph NW | 7% |
| Sunday Night | 42°F | Mostly Clear | 5 mph NW | 7% |
| Monday | 64°F | Sunny | 5 to 10 mph NW | 3% |
| Monday Night | 40°F | Mostly Clear | 5 to 10 mph NW | 2% |
| Tuesday | 67°F | Sunny | 5 to 10 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Marietta (33.954, -84.542). Updated through the day.
Growing snapshot for Marietta
Last spring frost
Mar 27
First fall frost
Nov 7
Growing season
225 days
Hardiness zone
8a
More local growing data for Marietta: nearby ZIP 30090 weather · frost dates · planting calendar · Georgia frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mableton 1 N, Ga (7.1 mi from Marietta). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.