How many chill hours does 92278 get?

92278 averages 686 chill hours per winter, ranging from 443 to 1038 across the last 10 years.

What hardiness zone is 92278?

92278 is in USDA hardiness zone 9b.

Location almanac

The short answer

92278 averages 686 chill hours per winter (443–1,038 across 10 years) in USDA zone 9b.

92278 climate
Average chill hours	686 (443–1,038 across 10 winters)
USDA hardiness zone	9b
Last spring frost	typically January 2 – February 24
First fall frost	typically December 12 – December 22

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 92278’s chill hours and zone:

Chill and zone requirements are comfortably met in 92278.

Show 55 more good fit varieties

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

Show 2 more marginal varieties

How many chill hours does 92278 get?: 92278 averages 686 chill hours per winter, ranging from 443 to 1038 across the last 10 years.
What hardiness zone is 92278?: 92278 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