Last frost date in Cibolo, TX
The average last frost in Cibolo is February 21. By March 14 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about December 5, which leaves 289 frost-free days. An early freeze before November 16 happens one year in ten.
- Safe after (10% risk)
- Mar 14
- Average first frost
- Dec 5
- Frost-free season
- 289 days
- Hard freeze (28°F) ends
- Jan 26
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2259°
- FriOct 2361°
- SatOct 2463°
- SunOct 2561°
- MonOct 2663°
- TueOct 2760°
- WedOct 2860°
Planting calendar for Cibolo
Windows count forward or back from the average frost dates above. Click a crop for dates across Texas.
TomatoesFeb 28–Mar 14
PumpkinsMar 7–Mar 21
SunflowersFeb 21–Mar 14
CucumbersMar 7–Mar 14
CornFeb 28–Mar 14
Sweet potatoesMar 14–Mar 28
WatermelonMar 7–Mar 21
Green beansFeb 28–Mar 21
ZucchiniFeb 28–Mar 14
OkraMar 14–Mar 28
PeppersMar 7–Mar 21
BasilFeb 28–Mar 14
Butternut squashFeb 28–Mar 14
CantaloupeMar 7–Mar 21
EggplantMar 7–Mar 21
PotatoesJan 24–Feb 7
OnionsJan 10–Jan 31
CarrotsJan 31–Mar 7
LettuceFeb 7–Feb 28
BroccoliJan 24–Feb 7
BeetsJan 24–Mar 7
PeasJan 10–Jan 24
CabbageJan 24–Feb 7
RadishesJan 17–Feb 28
Brussels sproutsFeb 7–Feb 21
SpinachJan 10–Jan 31
CilantroFeb 7–Feb 28
KaleJan 24–Feb 7
Collard greensJan 24–Feb 7
TurnipsJan 24–Feb 7
DillFeb 21–Mar 7
CeleryFeb 28–Mar 7
CauliflowerFeb 7–Feb 21
LeeksFeb 7–Feb 21
Swiss chardFeb 7–Mar 7
ParsleyFeb 7–Feb 28
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesJan 24–Feb 7
AsparagusJan 24–Feb 7Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Jan 10 | Feb 21 | Mar 14 | Nov 16 | Dec 5 | Jan 1 |
| Hard freeze, 28°F | Dec 18 | Jan 26 | Mar 5 | Nov 28 | Dec 19 | Feb 1 |
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 Randolph AFB (USW00012911) sits 3.7 miles from the center of Cibolo at 760 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 Cibolo, TX?
The average last frost date in Cibolo is February 21, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 14.
When is the first frost in Cibolo?
The first frost in fall usually comes around December 5. One year in ten it arrives before November 16.
How long is the growing season in Cibolo?
About 289 days between the average last and first frost.
When should I plant tomatoes in Cibolo?
Plant tomato seedlings outside from February 28 to March 14. Start seeds indoors six to eight weeks earlier.
Nearby in Texas
- SchertzFeb 21
- Universal CityFeb 21
- ConverseFeb 21
- New BraunfelsMar 8
- SeguinMar 1
- Timberwood ParkFeb 26
- San AntonioFeb 25
- Canyon LakeMar 1
- San MarcosFeb 28
- BoerneMar 15
- KyleFeb 28
- AustinFeb 20