Marietta, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a city in Cobb County, Georgia.
Today
93°F
Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 93. Heat index values as high as 99. Northeast wind 0 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 22% |
| Tonight | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph E | 31% |
| Sunday | 91°F | Sunny | 0 to 5 mph E | 9% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 20% |
| Monday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph N | 26% |
| Monday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 60% |
| Tuesday | 86°F | Showers And Thunderstorms Likely | 5 mph E | 66% |
| Tuesday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 to 10 mph E | 66% |
| Wednesday | 80°F | Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph E | 44% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms then Partly Cloudy | 10 mph E | 35% |
| Thursday | 79°F | Mostly Sunny | 5 to 10 mph NE | 11% |
| Thursday Night | 62°F | Partly Cloudy | 5 mph NE | 11% |
| Friday | 80°F | Mostly Sunny | 5 mph N | 10% |
| Friday Night | 61°F | Partly Cloudy | 5 mph NE | 10% |
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 Sep 19, 2026.