Imperial Beach, CA 92173 Frost Dates
Imperial Beach, CA: when does the frost end?
The NOAA station nearest to 92173 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).
Imperial Beach against the rest of the dataset
About 365 days separate Imperial Beach's last and first frost, putting it 1,168 of 40,283 ZIP codes nationally. Within CA, it ranks 501 of 2,555.
Learn more
Before leaning on 92173's figures: the methodology explains exactly which NOAA and USDA figures feed 92173's numbers, while zone vs. frost date explains why Zone 10b and Imperial Beach's frost date answer different questions.