Last frost date in Redwood City, CA
Expect the last frost in Redwood City around January 17. Frost after February 16 happens in only one year out of ten. The first fall frost usually arrives about December 12, which leaves 333 frost-free days. An early freeze before November 24 happens one year in ten.
- Safe after (10% risk)
- Feb 16
- Average first frost
- Dec 12
- Frost-free season
- 333 days
- Hard freeze (28°F) ends
- Dec 31
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2253°
- FriOct 2349°
- SatOct 2451°
- SunOct 2553°
- MonOct 2652°
- TueOct 2753°
Planting calendar for Redwood City
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 15–Mar 1
WatermelonFeb 15–Mar 1
Green beansFeb 15–Mar 8
ZucchiniFeb 15–Mar 1
OkraFeb 15–Mar 1
PeppersFeb 15–Mar 1
BasilFeb 15–Mar 1
Butternut squashFeb 15–Mar 1
CantaloupeFeb 15–Mar 1
EggplantFeb 15–Mar 1
PotatoesDec 20–Jan 3
OnionsDec 6–Dec 27
CarrotsDec 27–Jan 31
LettuceJan 3–Jan 24
BroccoliDec 20–Jan 3
BeetsDec 20–Jan 31
PeasDec 6–Dec 20
CabbageDec 20–Jan 3
RadishesDec 13–Jan 24
Brussels sproutsJan 3–Jan 17
SpinachDec 6–Dec 27
CilantroJan 3–Jan 24
KaleDec 20–Jan 3
Collard greensDec 20–Jan 3
TurnipsDec 20–Jan 3
DillJan 17–Jan 31
CeleryJan 24–Jan 31
CauliflowerJan 3–Jan 17
LeeksJan 3–Jan 17
Swiss chardJan 3–Jan 31
ParsleyJan 3–Jan 24
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesDec 20–Jan 3
AsparagusDec 20–Jan 3Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Dec 20 | Jan 17 | Feb 16 | Nov 24 | Dec 12 | Jan 14 |
| Hard freeze, 28°F | Dec 14 | Dec 31 | Jan 22 | Dec 5 | Dec 26 | Jan 15 |
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 Redwood City (USC00047339) sits 3.0 miles from the center of Redwood City at 31 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 Redwood City, CA?
The average last frost date in Redwood City is January 17, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after February 16.
When is the first frost in Redwood City?
The first frost in fall usually comes around December 12. One year in ten it arrives before November 24.
How long is the growing season in Redwood City?
About 333 days between the average last and first frost.
When should I plant tomatoes in Redwood City?
Plant tomato seedlings outside from February 15 to March 1. Start seeds indoors six to eight weeks earlier.
Nearby in California
- San CarlosJan 17
- Foster CityJan 17
- Menlo ParkFeb 1
- BelmontJan 17
- East Palo AltoFeb 1
- San MateoDec 29
- Palo AltoFeb 1
- BurlingameDec 29
- HaywardJan 2
- NewarkJan 1
- Mountain ViewJan 6
- MillbraeDec 29