Last frost date in Hanford, CA
The average last frost in Hanford is February 7. By March 4 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about December 1, which leaves 296 frost-free days. An early freeze before November 16 happens one year in ten.
- Safe after (10% risk)
- Mar 4
- Average first frost
- Dec 1
- Frost-free season
- 296 days
- Hard freeze (28°F) ends
- Jan 12
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2251°
- FriOct 2349°
- SatOct 2448°
- SunOct 2549°
- MonOct 2648°
- TueOct 2748°
Planting calendar for Hanford
Windows count forward or back from the average frost dates above. Click a crop for dates across California.
TomatoesFeb 15–Mar 1
PumpkinsFeb 21–Mar 7
SunflowersFeb 15–Mar 8
CucumbersFeb 22–Mar 1
CornFeb 15–Mar 1
Sweet potatoesFeb 28–Mar 14
WatermelonFeb 21–Mar 7
Green beansFeb 15–Mar 8
ZucchiniFeb 15–Mar 1
OkraFeb 28–Mar 14
PeppersFeb 21–Mar 7
BasilFeb 15–Mar 1
Butternut squashFeb 15–Mar 1
CantaloupeFeb 21–Mar 7
EggplantFeb 21–Mar 7
PotatoesJan 10–Jan 24
OnionsDec 27–Jan 17
CarrotsJan 17–Feb 21
LettuceJan 24–Feb 14
BroccoliJan 10–Jan 24
BeetsJan 10–Feb 21
PeasDec 27–Jan 10
CabbageJan 10–Jan 24
RadishesJan 3–Feb 14
Brussels sproutsJan 24–Feb 7
SpinachDec 27–Jan 17
CilantroJan 24–Feb 14
KaleJan 10–Jan 24
Collard greensJan 10–Jan 24
TurnipsJan 10–Jan 24
DillFeb 7–Feb 21
CeleryFeb 14–Feb 21
CauliflowerJan 24–Feb 7
LeeksJan 24–Feb 7
Swiss chardJan 24–Feb 21
ParsleyJan 24–Feb 14
Tulip bulbsNov 17–Dec 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesJan 10–Jan 24
AsparagusJan 10–Jan 24Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Jan 9 | Feb 7 | Mar 4 | Nov 16 | Dec 1 | Dec 22 |
| Hard freeze, 28°F | Dec 16 | Jan 12 | Feb 9 | Nov 28 | Dec 14 | 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 Hanford 1 S (USC00043747) sits 1.3 miles from the center of Hanford at 237 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 Hanford, CA?
The average last frost date in Hanford is February 7, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 4.
When is the first frost in Hanford?
The first frost in fall usually comes around December 1. One year in ten it arrives before November 16.
How long is the growing season in Hanford?
About 296 days between the average last and first frost.
When should I plant tomatoes in Hanford?
Plant tomato seedlings outside from February 15 to March 1. Start seeds indoors six to eight weeks earlier.