Tustin, CA 92623 Frost Dates
Tustin, CA: when does the frost end?
The NOAA station nearest to 92623 does not report a usable frost-date normal for either event, so no last-frost or first-frost figure is shown here. The USDA hardiness zone below is still real: Zone 10b (35 to 40°F average annual minimum).
Tustin against the rest of the dataset
At roughly 365 frost-free days, Tustin places 685 of 40,283 ZIP codes in this dataset. Within CA, it ranks 302 of 2,555.
Learn more
Before leaning on 92623's figures: the methodology explains exactly which NOAA and USDA figures feed 92623's numbers, while zone vs. frost date explains why Zone 10b and Tustin's frost date answer different questions.