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Planting calendar for ZIP 94583 (San Ramon, CA)

When to plant vegetables in San Ramon, CA (USDA hardiness zone 9b). Typical last spring frost around Mar 8, 2026 36 days year to year), first fall frost around Dec 22, 202631 days).

Playing it safe? Spring frost holds off until about Apr 23, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in San Ramon, CA

January

February

March

April

May

September

October

Understand your frost dates

Frost dates for ZIP 94583: NOAA 1991-2020 normals (USC00045915 MT DIABLO JUNCTION, CA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.