Last frost date in Alabaster, AL
In Alabaster, the last spring frost comes around March 12 in an average year. Wait until March 31 if you want 90% odds of no more frost. The first fall frost usually arrives about November 16, which leaves 248 frost-free days. An early freeze before November 1 happens one year in ten.
- Safe after (10% risk)
- Mar 31
- Average first frost
- Nov 16
- Frost-free season
- 248 days
- Hard freeze (28°F) ends
- Feb 27
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2248°
- FriOct 2346°
- SatOct 2446°
- SunOct 2545°
- MonOct 2646°
- TueOct 2748°
- WedOct 2847°
Planting calendar for Alabaster
Windows count forward or back from the average frost dates above. Click a crop for dates across Alabama.
TomatoesMar 19–Apr 2
PumpkinsMar 26–Apr 9
SunflowersMar 12–Apr 2
CucumbersMar 26–Apr 2
CornMar 19–Apr 2
Sweet potatoesApr 2–Apr 16
WatermelonMar 26–Apr 9
Green beansMar 19–Apr 9
ZucchiniMar 19–Apr 2
OkraApr 2–Apr 16
PeppersMar 26–Apr 9
BasilMar 19–Apr 2
Butternut squashMar 19–Apr 2
CantaloupeMar 26–Apr 9
EggplantMar 26–Apr 9
PotatoesFeb 12–Feb 26
OnionsJan 29–Feb 19
CarrotsFeb 19–Mar 26
LettuceFeb 26–Mar 19
BroccoliFeb 12–Feb 26
BeetsFeb 12–Mar 26
PeasJan 29–Feb 12
CabbageFeb 12–Feb 26
RadishesFeb 5–Mar 19
Brussels sproutsFeb 26–Mar 12
SpinachJan 29–Feb 19
CilantroFeb 26–Mar 19
KaleFeb 12–Feb 26
Collard greensFeb 12–Feb 26
TurnipsFeb 12–Feb 26
DillMar 12–Mar 26
CeleryMar 19–Mar 26
CauliflowerFeb 26–Mar 12
LeeksFeb 26–Mar 12
Swiss chardFeb 26–Mar 26
ParsleyFeb 26–Mar 19
Tulip bulbsNov 2–Dec 7
GarlicOct 26–Nov 30
Daffodil bulbsOct 19–Nov 30
StrawberriesFeb 12–Feb 26
AsparagusFeb 12–Feb 26Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Feb 20 | Mar 12 | Mar 31 | Nov 1 | Nov 16 | Dec 4 |
| Hard freeze, 28°F | Jan 31 | Feb 27 | Mar 17 | Nov 10 | Dec 1 | Dec 28 |
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 Alabaster Shelby County Airport (USW00053864) sits 3.5 miles from the center of Alabaster at 565 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 Alabaster, AL?
The average last frost date in Alabaster is March 12, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 31.
When is the first frost in Alabaster?
The first frost in fall usually comes around November 16. One year in ten it arrives before November 1.
How long is the growing season in Alabaster?
About 248 days between the average last and first frost.
When should I plant tomatoes in Alabaster?
Plant tomato seedlings outside from March 19 to April 2. Start seeds indoors six to eight weeks earlier.
Nearby in Alabama
- HelenaMar 19
- PelhamMar 19
- HooverMar 19
- BessemerMar 23
- HomewoodMar 21
- Vestavia HillsMar 21
- Mountain BrookMar 21
- BirminghamMar 21
- TrussvilleApr 4
- TuscaloosaMar 18
- NorthportMar 18
- PrattvilleMar 13