How many chill hours does 94021 get?

94021 averages 1077 chill hours per winter, ranging from 637 to 1742 across the last 10 years.

What hardiness zone is 94021?

94021 is in USDA hardiness zone 9b.

Location almanac

The short answer

94021 averages 1,077 chill hours per winter (637–1,742 across 10 years) in USDA zone 9b.

Computed from 10 winters of ERA5 hourly temperature (Open-Meteo, 2015–2025); zones from USDA PHZM 2023. Data updated July 3, 2026. See methodology.

Every variety in our database, checked against 94021’s chill hours and zone:

Chill and zone requirements are comfortably met in 94021.

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How many chill hours does 94021 get?: 94021 averages 1077 chill hours per winter, ranging from 637 to 1742 across the last 10 years.
What hardiness zone is 94021?: 94021 is in USDA hardiness zone 9b.

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[1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
[2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026