Last frost date in Thousand Oaks, CA
The average last frost in Thousand Oaks is December 31. By February 2 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about December 28, which leaves 365 frost-free days. An early freeze before December 7 happens one year in ten.
- Safe after (10% risk)
- Feb 2
- Average first frost
- Dec 28
- Frost-free season
- 365 days
- Hard freeze (28°F) ends
- rare
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2250°
- FriOct 2351°
- SatOct 2453°
- SunOct 2555°
- MonOct 2655°
- TueOct 2755°
Planting calendar for Thousand Oaks
Windows count forward or back from the average frost dates above. Click a crop for dates across California.
TomatoesJan 7–Jan 21
PumpkinsJan 14–Jan 28
SunflowersDec 31–Jan 21
CucumbersJan 14–Jan 21
CornJan 7–Jan 21
Sweet potatoesJan 21–Feb 4
WatermelonJan 14–Jan 28
Green beansJan 7–Jan 28
ZucchiniJan 7–Jan 21
OkraJan 21–Feb 4
PeppersJan 14–Jan 28
BasilJan 7–Jan 21
Butternut squashJan 7–Jan 21
CantaloupeJan 14–Jan 28
EggplantJan 14–Jan 28
PotatoesDec 3–Dec 17
OnionsNov 19–Dec 10
CarrotsDec 10–Jan 14
LettuceDec 17–Jan 7
BroccoliDec 3–Dec 17
BeetsDec 3–Jan 14
PeasNov 19–Dec 3
CabbageDec 3–Dec 17
RadishesNov 26–Jan 7
Brussels sproutsDec 17–Dec 31
SpinachNov 19–Dec 10
CilantroDec 17–Jan 7
KaleDec 3–Dec 17
Collard greensDec 3–Dec 17
TurnipsDec 3–Dec 17
DillDec 31–Jan 14
CeleryJan 7–Jan 14
CauliflowerDec 17–Dec 31
LeeksDec 17–Dec 31
Swiss chardDec 17–Jan 14
ParsleyDec 17–Jan 7
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesDec 3–Dec 17
AsparagusDec 3–Dec 17Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Dec 11 | Dec 31 | Feb 2 | Dec 7 | Dec 28 | 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 Camarillo Airport (USW00023136) sits 12.1 miles from the center of Thousand Oaks at 77 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 Thousand Oaks, CA?
The average last frost date in Thousand Oaks is December 31, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after February 2.
When is the first frost in Thousand Oaks?
The first frost in fall usually comes around December 28. One year in ten it arrives before December 7.
How long is the growing season in Thousand Oaks?
About 365 days between the average last and first frost.
When should I plant tomatoes in Thousand Oaks?
Plant tomato seedlings outside from January 7 to January 21. Start seeds indoors six to eight weeks earlier.
Nearby in California
- MoorparkDec 31
- Simi ValleyJan 24
- CamarilloDec 31
- CalabasasJan 24
- Santa PaulaDec 31
- Port Huenemeno frost
- Oxnardno frost
- Stevenson RanchJan 8
- San Buenaventurano frost
- Santa Monicano frost
- San FernandoJan 2
- Beverly Hillsno frost