Last frost date in St. Marys, GA
The average last frost in St. Marys is February 19. By March 14 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about December 14, which leaves 299 frost-free days. An early freeze before November 21 happens one year in ten.
- Safe after (10% risk)
- Mar 14
- Average first frost
- Dec 14
- Frost-free season
- 299 days
- Hard freeze (28°F) ends
- Feb 3
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2255°
- FriOct 2361°
- SatOct 2463°
- SunOct 2561°
- MonOct 2659°
- TueOct 2759°
- WedOct 2859°
Planting calendar for St. Marys
Windows count forward or back from the average frost dates above. Click a crop for dates across Georgia.
TomatoesFeb 26–Mar 12
PumpkinsMar 5–Mar 19
SunflowersFeb 19–Mar 12
CucumbersMar 5–Mar 12
CornFeb 26–Mar 12
Sweet potatoesMar 12–Mar 26
WatermelonMar 5–Mar 19
Green beansFeb 26–Mar 19
ZucchiniFeb 26–Mar 12
OkraMar 12–Mar 26
PeppersMar 5–Mar 19
BasilFeb 26–Mar 12
Butternut squashFeb 26–Mar 12
CantaloupeMar 5–Mar 19
EggplantMar 5–Mar 19
PotatoesJan 22–Feb 5
OnionsJan 8–Jan 29
CarrotsJan 29–Mar 5
LettuceFeb 5–Feb 26
BroccoliJan 22–Feb 5
BeetsJan 22–Mar 5
PeasJan 8–Jan 22
CabbageJan 22–Feb 5
RadishesJan 15–Feb 26
Brussels sproutsFeb 5–Feb 19
SpinachJan 8–Jan 29
CilantroFeb 5–Feb 26
KaleJan 22–Feb 5
Collard greensJan 22–Feb 5
TurnipsJan 22–Feb 5
DillFeb 19–Mar 5
CeleryFeb 26–Mar 5
CauliflowerFeb 5–Feb 19
LeeksFeb 5–Feb 19
Swiss chardFeb 5–Mar 5
ParsleyFeb 5–Feb 26
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesJan 22–Feb 5
AsparagusJan 22–Feb 5Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Jan 19 | Feb 19 | Mar 14 | Nov 21 | Dec 14 | Jan 15 |
| Hard freeze, 28°F | Dec 31 | Feb 3 | Feb 28 | Dec 2 | Jan 3 | Feb 7 |
Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.
Where these numbers come from
NOAA station Brunswick 23 S (USW00063856) sits 7.9 miles from the center of St. Marys at 25 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.
Questions
When is the last frost in St. Marys, GA?
The average last frost date in St. Marys is February 19, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 14.
When is the first frost in St. Marys?
The first frost in fall usually comes around December 14. One year in ten it arrives before November 21.
How long is the growing season in St. Marys?
About 299 days between the average last and first frost.
When should I plant tomatoes in St. Marys?
Plant tomato seedlings outside from February 26 to March 12. Start seeds indoors six to eight weeks earlier.
Nearby in Georgia
- KingslandMar 14
- HinesvilleMar 5
- Richmond HillMar 2
- SavannahMar 2
- PoolerMar 2
- ValdostaMar 5
- StatesboroMar 7
- AlbanyMar 8
- PerryMar 11
- Warner RobinsMar 11
- AugustaMar 23
- Macon-Bibb CountyMar 21