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Planting calendar for ZIP 92404 (San Bernardino, CA)

When to plant vegetables in San Bernardino, CA (USDA hardiness zone 10a). Typical last spring frost around May 5, 2026 20 days year to year), first fall frost around Nov 2, 202613 days).

Playing it safe? Spring frost holds off until about May 30, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full San Bernardino, CA planting calendar for dates typical of the whole city.

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Month by month in San Bernardino, CA

February

March

April

May

June

August

September

Understand your frost dates

Frost dates for ZIP 92404: NOAA 1991-2020 normals (USC00044671 LAKE ARROWHEAD, CA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.