St. Marys, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Marys, a city in Camden County, Georgia.
Tonight
73°F
Partly Cloudy
Partly cloudy. Low around 73, with temperatures rising to around 74 overnight. East wind 1 to 6 mph.
7-day forecast for St. Marys
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Partly Cloudy | 1 to 6 mph E | 3% |
| Saturday | 89°F | Mostly Sunny | 2 to 8 mph NE | 6% |
| Saturday Night | 74°F | Partly Cloudy | 0 to 7 mph E | 12% |
| Sunday | 88°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 9 mph NE | 42% |
| Sunday Night | 74°F | Chance Showers And Thunderstorms | 0 to 6 mph E | 42% |
| Monday | 87°F | Showers And Thunderstorms Likely | 0 to 9 mph NE | 64% |
| Monday Night | 74°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 to 7 mph NE | 64% |
| Tuesday | 87°F | Showers And Thunderstorms Likely | 1 to 8 mph NE | 70% |
| Tuesday Night | 73°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 7 mph NE | 70% |
| Wednesday | 86°F | Showers And Thunderstorms Likely | 3 to 12 mph NE | 64% |
| Wednesday Night | 73°F | Showers And Thunderstorms Likely | 5 to 9 mph NE | 64% |
| Thursday | 84°F | Chance Rain Showers then Chance Showers And Thunderstorms | 10 to 17 mph NE | 44% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 5 to 14 mph NE | 44% |
| Friday | 83°F | Chance Rain Showers then Chance Showers And Thunderstorms | 13 to 16 mph NE | 39% |
Forecast source: National Weather Service (api.weather.gov) for St. Marys (30.754, -81.573). Updated through the day.
Growing snapshot for St. Marys
Last spring frost
Feb 19
First fall frost
Dec 14
Growing season
299 days
Hardiness zone
9a
More local growing data for St. Marys: nearby ZIP 31547 weather · frost dates · planting calendar · Georgia frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Brunswick 23 S, Ga (4.6 mi from St. Marys). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.