Vista, CA 92081 Frost Dates
Vista, CA: when does the frost end?
The NOAA station nearest to 92081 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 10a (30 to 35°F average annual minimum).
Vista against the rest of the dataset
Vista's growing season runs about 365 days, ranking 551 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 237 of 2,555.
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Before leaning on 92081's figures: zone vs. frost date explains why Zone 10a and Vista's frost date answer different questions, while local microclimates explains what one yard in Vista can differ from the 92081 normal.