Marietta, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a city in Cobb County, Georgia.
Today
86°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 10am and 2pm, then showers and thunderstorms likely. Mostly sunny. High near 86, with temperatures falling to around 81 in the afternoon. East wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 60% |
| Tonight | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 53% |
| Wednesday | 86°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 74% |
| Wednesday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph S | 56% |
| Thursday | 88°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 66% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 66% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 37% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 37% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 46% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 46% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 47% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 47% |
| Monday | 89°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 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 Aug 4, 2026.