Last frost date in Campbell, CA
In Campbell, the last spring frost comes around February 2 in an average year. Wait until March 14 if you want 90% odds of no more frost. The first fall frost usually arrives about December 6, which leaves 310 frost-free days. An early freeze before November 16 happens one year in ten.
- Safe after (10% risk)
- Mar 14
- Average first frost
- Dec 6
- Frost-free season
- 310 days
- Hard freeze (28°F) ends
- Jan 1
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2251°
- FriOct 2344°
- SatOct 2449°
- SunOct 2550°
- MonOct 2650°
- TueOct 2749°
Planting calendar for Campbell
Windows count forward or back from the average frost dates above. Click a crop for dates across California.
TomatoesFeb 15–Mar 1
PumpkinsFeb 16–Mar 2
SunflowersFeb 15–Mar 8
CucumbersFeb 22–Mar 1
CornFeb 15–Mar 1
Sweet potatoesFeb 23–Mar 9
WatermelonFeb 16–Mar 2
Green beansFeb 15–Mar 8
ZucchiniFeb 15–Mar 1
OkraFeb 23–Mar 9
PeppersFeb 16–Mar 2
BasilFeb 15–Mar 1
Butternut squashFeb 15–Mar 1
CantaloupeFeb 16–Mar 2
EggplantFeb 16–Mar 2
PotatoesJan 5–Jan 19
OnionsDec 22–Jan 12
CarrotsJan 12–Feb 16
LettuceJan 19–Feb 9
BroccoliJan 5–Jan 19
BeetsJan 5–Feb 16
PeasDec 22–Jan 5
CabbageJan 5–Jan 19
RadishesDec 29–Feb 9
Brussels sproutsJan 19–Feb 2
SpinachDec 22–Jan 12
CilantroJan 19–Feb 9
KaleJan 5–Jan 19
Collard greensJan 5–Jan 19
TurnipsJan 5–Jan 19
DillFeb 2–Feb 16
CeleryFeb 9–Feb 16
CauliflowerJan 19–Feb 2
LeeksJan 19–Feb 2
Swiss chardJan 19–Feb 16
ParsleyJan 19–Feb 9
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesJan 5–Jan 19
AsparagusJan 5–Jan 19Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Dec 31 | Feb 2 | Mar 14 | Nov 16 | Dec 6 | Jan 7 |
| Hard freeze, 28°F | Dec 9 | Jan 1 | Jan 26 | Nov 28 | Dec 19 | Jan 13 |
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 Los Gatos (USC00045123) sits 3.4 miles from the center of Campbell at 365 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 Campbell, CA?
The average last frost date in Campbell is February 2, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 14.
When is the first frost in Campbell?
The first frost in fall usually comes around December 6. One year in ten it arrives before November 16.
How long is the growing season in Campbell?
About 310 days between the average last and first frost.
When should I plant tomatoes in Campbell?
Plant tomato seedlings outside from February 15 to March 1. Start seeds indoors six to eight weeks earlier.