Last frost date in Oroville, CA
In Oroville, the last spring frost comes around January 30 in an average year. Wait until March 3 if you want 90% odds of no more frost. The first fall frost usually arrives about December 13, which leaves 321 frost-free days. An early freeze before November 21 happens one year in ten.
- Safe after (10% risk)
- Mar 3
- Average first frost
- Dec 13
- Frost-free season
- 321 days
- Hard freeze (28°F) ends
- Jan 5
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2252°
- FriOct 2347°
- SatOct 2446°
- SunOct 2548°
- MonOct 2648°
- TueOct 2748°
Planting calendar for Oroville
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 20–Mar 6
WatermelonFeb 15–Mar 1
Green beansFeb 15–Mar 8
ZucchiniFeb 15–Mar 1
OkraFeb 20–Mar 6
PeppersFeb 15–Mar 1
BasilFeb 15–Mar 1
Butternut squashFeb 15–Mar 1
CantaloupeFeb 15–Mar 1
EggplantFeb 15–Mar 1
PotatoesJan 2–Jan 16
OnionsDec 19–Jan 9
CarrotsJan 9–Feb 13
LettuceJan 16–Feb 6
BroccoliJan 2–Jan 16
BeetsJan 2–Feb 13
PeasDec 19–Jan 2
CabbageJan 2–Jan 16
RadishesDec 26–Feb 6
Brussels sproutsJan 16–Jan 30
SpinachDec 19–Jan 9
CilantroJan 16–Feb 6
KaleJan 2–Jan 16
Collard greensJan 2–Jan 16
TurnipsJan 2–Jan 16
DillJan 30–Feb 13
CeleryFeb 6–Feb 13
CauliflowerJan 16–Jan 30
LeeksJan 16–Jan 30
Swiss chardJan 16–Feb 13
ParsleyJan 16–Feb 6
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesJan 2–Jan 16
AsparagusJan 2–Jan 16Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Dec 26 | Jan 30 | Mar 3 | Nov 21 | Dec 13 | Jan 11 |
| Hard freeze, 28°F | Dec 14 | Jan 5 | Feb 4 | Dec 5 | Dec 25 | Jan 25 |
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 Oroville (USC00046521) sits 1.6 miles from the center of Oroville at 171 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 Oroville, CA?
The average last frost date in Oroville is January 30, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after March 3.
When is the first frost in Oroville?
The first frost in fall usually comes around December 13. One year in ten it arrives before November 21.
How long is the growing season in Oroville?
About 321 days between the average last and first frost.
When should I plant tomatoes in Oroville?
Plant tomato seedlings outside from February 15 to March 1. Start seeds indoors six to eight weeks earlier.
Nearby in California
- ChicoMar 4
- Yuba CityJan 15
- LindaFeb 11
- LincolnFeb 25
- RocklinFeb 25
- RosevilleFeb 22
- AntelopeJan 12
- Granite BayFeb 25
- Foothill FarmsJan 12
- Citrus HeightsJan 12
- North HighlandsJan 12
- WoodlandFeb 7