How many chill hours does 95903 get?

95903 averages 1068 chill hours per winter, ranging from 935 to 1491 across the last 10 years.

What hardiness zone is 95903?

95903 is in USDA hardiness zone 9b.

Location almanac

The short answer

95903 averages 1,068 chill hours per winter (935–1,491 across 10 years) in USDA zone 9b.

95903 climate
Average chill hours	1,068 (935–1,491 across 10 winters)
USDA hardiness zone	9b
Last spring frost	typically January 12 – March 5
First fall frost	typically November 26 – December 10

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 95903’s chill hours and zone:

Chill and zone requirements are comfortably met in 95903.

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How many chill hours does 95903 get?: 95903 averages 1068 chill hours per winter, ranging from 935 to 1491 across the last 10 years.
What hardiness zone is 95903?: 95903 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