Last frost date in San Jacinto, CA
The average last frost in San Jacinto is January 31. By February 28 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about December 10, which leaves 315 frost-free days. An early freeze before November 22 happens one year in ten.
- Safe after (10% risk)
- Feb 28
- Average first frost
- Dec 10
- Frost-free season
- 315 days
- Hard freeze (28°F) ends
- Jan 3
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2252°
- FriOct 2350°
- SatOct 2453°
- SunOct 2554°
- MonOct 2654°
- TueOct 2755°
Planting calendar for San Jacinto
Windows count forward or back from the average frost dates above. Click a crop for dates across California.
TomatoesFeb 15–Mar 1
PumpkinsFeb 15–Mar 1
SunflowersFeb 15–Mar 8
CucumbersFeb 22–Mar 1
CornFeb 15–Mar 1
Sweet potatoesFeb 21–Mar 7
WatermelonFeb 15–Mar 1
Green beansFeb 15–Mar 8
ZucchiniFeb 15–Mar 1
OkraFeb 21–Mar 7
PeppersFeb 15–Mar 1
BasilFeb 15–Mar 1
Butternut squashFeb 15–Mar 1
CantaloupeFeb 15–Mar 1
EggplantFeb 15–Mar 1
PotatoesJan 3–Jan 17
OnionsDec 20–Jan 10
CarrotsJan 10–Feb 14
LettuceJan 17–Feb 7
BroccoliJan 3–Jan 17
BeetsJan 3–Feb 14
PeasDec 20–Jan 3
CabbageJan 3–Jan 17
RadishesDec 27–Feb 7
Brussels sproutsJan 17–Jan 31
SpinachDec 20–Jan 10
CilantroJan 17–Feb 7
KaleJan 3–Jan 17
Collard greensJan 3–Jan 17
TurnipsJan 3–Jan 17
DillJan 31–Feb 14
CeleryFeb 7–Feb 14
CauliflowerJan 17–Jan 31
LeeksJan 17–Jan 31
Swiss chardJan 17–Feb 14
ParsleyJan 17–Feb 7
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesJan 3–Jan 17
AsparagusJan 3–Jan 17Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Dec 31 | Jan 31 | Feb 28 | Nov 22 | Dec 10 | Jan 6 |
| Hard freeze, 28°F | Dec 11 | Jan 3 | Jan 29 | Dec 2 | Dec 21 | Jan 15 |
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 San Jacinto (USC00047813) sits 1.2 miles from the center of San Jacinto at 1,525 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 San Jacinto, CA?
The average last frost date in San Jacinto is January 31, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after February 28.
When is the first frost in San Jacinto?
The first frost in fall usually comes around December 10. One year in ten it arrives before November 22.
How long is the growing season in San Jacinto?
About 315 days between the average last and first frost.
When should I plant tomatoes in San Jacinto?
Plant tomato seedlings outside from February 15 to March 1. Start seeds indoors six to eight weeks earlier.
Nearby in California
- HemetJan 31
- East HemetJan 10
- BeaumontJan 31
- BanningJan 31
- PerrisJan 28
- MenifeeJan 28
- Moreno ValleyJan 27
- French ValleyFeb 2
- YucaipaJan 27
- MurrietaFeb 2
- WildomarJan 28
- RedlandsJan 27