Last frost date in Eureka, CA
In Eureka, the last spring frost comes around February 22 in an average year. Wait until March 23 if you want 90% odds of no more frost. The first fall frost usually arrives about December 7, which leaves 293 frost-free days. An early freeze before November 15 happens one year in ten.
- Safe after (10% risk)
- Mar 23
- Average first frost
- Dec 7
- Frost-free season
- 293 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 2246°
- FriOct 2341°
- SatOct 2444°
- SunOct 2546°
- MonOct 2646°
- TueOct 2745°
Planting calendar for Eureka
Windows count forward or back from the average frost dates above. Click a crop for dates across California.
TomatoesMar 1–Mar 15
PumpkinsMar 8–Mar 22
SunflowersFeb 22–Mar 15
CucumbersMar 8–Mar 15
CornMar 1–Mar 15
Sweet potatoesMar 15–Mar 29
WatermelonMar 8–Mar 22
Green beansMar 1–Mar 22
ZucchiniMar 1–Mar 15
OkraMar 15–Mar 29
PeppersMar 8–Mar 22
BasilMar 1–Mar 15
Butternut squashMar 1–Mar 15
CantaloupeMar 8–Mar 22
EggplantMar 8–Mar 22
PotatoesJan 25–Feb 8
OnionsJan 11–Feb 1
CarrotsFeb 1–Mar 8
LettuceFeb 8–Mar 1
BroccoliJan 25–Feb 8
BeetsJan 25–Mar 8
PeasJan 11–Jan 25
CabbageJan 25–Feb 8
RadishesJan 18–Mar 1
Brussels sproutsFeb 8–Feb 22
SpinachJan 11–Feb 1
CilantroFeb 8–Mar 1
KaleJan 25–Feb 8
Collard greensJan 25–Feb 8
TurnipsJan 25–Feb 8
DillFeb 22–Mar 8
CeleryMar 1–Mar 8
CauliflowerFeb 8–Feb 22
LeeksFeb 8–Feb 22
Swiss chardFeb 8–Mar 8
ParsleyFeb 8–Mar 1
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesJan 25–Feb 8
AsparagusJan 25–Feb 8Frost 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 22 | Mar 23 | Nov 15 | Dec 7 | Jan 11 |
| Hard freeze, 28°F | Dec 11 | Jan 3 | Feb 8 | Dec 3 | Dec 25 | Jan 29 |
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 Eureka Wfo Woodley Island (USW00024213) sits 0.9 miles from the center of Eureka at 20 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 Eureka, CA?
The average last frost date in Eureka is February 22, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 23.
When is the first frost in Eureka?
The first frost in fall usually comes around December 7. One year in ten it arrives before November 15.
How long is the growing season in Eureka?
About 293 days between the average last and first frost.
When should I plant tomatoes in Eureka?
Plant tomato seedlings outside from March 1 to March 15. Start seeds indoors six to eight weeks earlier.