Last frost date in Los Banos, CA
In Los Banos, the last spring frost comes around January 26 in an average year. Wait until February 20 if you want 90% odds of no more frost. The first fall frost usually arrives about December 10, which leaves 322 frost-free days. An early freeze before November 26 happens one year in ten.
- Safe after (10% risk)
- Feb 20
- Average first frost
- Dec 10
- Frost-free season
- 322 days
- Hard freeze (28°F) ends
- Jan 6
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2252°
- FriOct 2347°
- SatOct 2449°
- SunOct 2549°
- MonOct 2649°
- TueOct 2749°
Planting calendar for Los Banos
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 16–Mar 2
WatermelonFeb 15–Mar 1
Green beansFeb 15–Mar 8
ZucchiniFeb 15–Mar 1
OkraFeb 16–Mar 2
PeppersFeb 15–Mar 1
BasilFeb 15–Mar 1
Butternut squashFeb 15–Mar 1
CantaloupeFeb 15–Mar 1
EggplantFeb 15–Mar 1
PotatoesDec 29–Jan 12
OnionsDec 15–Jan 5
CarrotsJan 5–Feb 9
LettuceJan 12–Feb 2
BroccoliDec 29–Jan 12
BeetsDec 29–Feb 9
PeasDec 15–Dec 29
CabbageDec 29–Jan 12
RadishesDec 22–Feb 2
Brussels sproutsJan 12–Jan 26
SpinachDec 15–Jan 5
CilantroJan 12–Feb 2
KaleDec 29–Jan 12
Collard greensDec 29–Jan 12
TurnipsDec 29–Jan 12
DillJan 26–Feb 9
CeleryFeb 2–Feb 9
CauliflowerJan 12–Jan 26
LeeksJan 12–Jan 26
Swiss chardJan 12–Feb 9
ParsleyJan 12–Feb 2
Tulip bulbsDec 15–Jan 15
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesDec 29–Jan 12
AsparagusDec 29–Jan 12Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Dec 29 | Jan 26 | Feb 20 | Nov 26 | Dec 10 | Jan 4 |
| Hard freeze, 28°F | Dec 17 | Jan 6 | Feb 4 | Dec 6 | Dec 24 | Jan 19 |
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 Los Banos (USC00045118) sits 1.5 miles from the center of Los Banos at 120 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 Los Banos, CA?
The average last frost date in Los Banos is January 26, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after February 20.
When is the first frost in Los Banos?
The first frost in fall usually comes around December 10. One year in ten it arrives before November 26.
How long is the growing season in Los Banos?
About 322 days between the average last and first frost.
When should I plant tomatoes in Los Banos?
Plant tomato seedlings outside from February 15 to March 1. Start seeds indoors six to eight weeks earlier.