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Chill hours in 95930

The short answer

95930 averages 2,173 chill hours per winter (1,9382,373 across 10 years) in USDA zone 9a.
95930 climate
Average chill hours2,173 (1,938–2,373 across 10 winters)
USDA hardiness zone9a
Last spring frosttypically April 10 – May 13
First fall frosttypically October 27 – November 18

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 95930’s chill hours and zone:

How many chill hours does 95930 get?
95930 averages 2173 chill hours per winter, ranging from 1938 to 2373 across the last 10 years.
What hardiness zone is 95930?
95930 is in USDA hardiness zone 9a.

Growing fruit trees in 95930? Get a care calendar anchored to this exact climate, with email reminders.

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Sources

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