Santa Monica, CA 90403 Frost Dates
Santa Monica, CA: when does the frost end?
The NOAA station nearest to 90403 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 11a (40 to 45°F average annual minimum).
Santa Monica against the rest of the dataset
Santa Monica's growing season runs about 365 days, ranking 586 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 263 of 2,555.
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Before leaning on 90403's figures: zone vs. frost date explains why Zone 11a and Santa Monica's frost date answer different questions, while local microclimates explains what one yard in Santa Monica can differ from the 90403 normal.