How many chill hours does 92257 get?

92257 averages 86 chill hours per winter, ranging from 30 to 218 across the last 10 years.

What hardiness zone is 92257?

92257 is in USDA hardiness zone 9b.

Location almanac

The short answer

92257 averages 86 chill hours per winter (30–218 across 10 years) in USDA zone 9b.

92257 climate
Average chill hours	86 (30–218 across 10 winters)
USDA hardiness 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 92257’s chill hours and zone:

Chill and zone requirements are comfortably met in 92257.

Possible in a good year or a favorable microclimate — click through for the caveats.

How many chill hours does 92257 get?: 92257 averages 86 chill hours per winter, ranging from 30 to 218 across the last 10 years.
What hardiness zone is 92257?: 92257 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