St. Marys, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Marys, a city in Camden County, Georgia.
Overnight
69°F
Partly Cloudy
Partly cloudy. Low around 69, with temperatures rising to around 71 overnight. East wind around 6 mph.
7-day forecast for St. Marys
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Partly Cloudy | 6 mph E | 0% |
| Wednesday | 80°F | Partly Sunny | 6 to 10 mph SE | 3% |
| Wednesday Night | 66°F | Mostly Cloudy then Patchy Fog | 0 to 6 mph SE | 4% |
| Thursday | 82°F | Patchy Fog then Sunny | 0 to 5 mph SE | 11% |
| Thursday Night | 66°F | Partly Cloudy then Patchy Fog | 3 mph S | 10% |
| Friday | 82°F | Patchy Fog then Slight Chance Rain Showers | 1 to 5 mph SW | 21% |
| Friday Night | 59°F | Slight Chance Rain Showers then Mostly Cloudy | 0 to 3 mph W | 21% |
| Saturday | 77°F | Sunny | 6 mph NW | 1% |
| Saturday Night | 54°F | Partly Cloudy | 3 mph N | 1% |
| Sunday | 73°F | Mostly Sunny | 6 mph N | 2% |
| Sunday Night | 53°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph N | 15% |
| Monday | 70°F | Slight Chance Rain Showers | 7 mph N | 15% |
| Monday Night | 52°F | Slight Chance Rain Showers then Partly Cloudy | 3 mph N | 15% |
| Tuesday | 71°F | Mostly Sunny then Slight Chance Rain Showers | 5 mph NE | 15% |
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 Nov 4, 2026.