How many chill hours does 95604 get?

95604 averages 1851 chill hours per winter, ranging from 1236 to 2138 across the last 10 years.

What hardiness zone is 95604?

95604 is in USDA hardiness zone 9b.

Location almanac

The short answer

95604 averages 1,851 chill hours per winter (1,236–2,138 across 10 years) in USDA zone 9b.

95604 climate
Average chill hours	1,851 (1,236–2,138 across 10 winters)
USDA hardiness zone	9b
Last spring frost	typically May 12 – June 19
First fall frost	typically September 23 – November 3

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 95604’s chill hours and zone:

Chill and zone requirements are comfortably met in 95604.

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How many chill hours does 95604 get?: 95604 averages 1851 chill hours per winter, ranging from 1236 to 2138 across the last 10 years.
What hardiness zone is 95604?: 95604 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