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Chill hours in 95573

The short answer

95573 averages 2,187 chill hours per winter (1,7002,421 across 10 years) in USDA zone 9a.
95573 climate
Average chill hours2,187 (1,700–2,421 across 10 winters)
USDA hardiness zone9a
Last spring frosttypically May 9 – June 10
First fall frosttypically October 12 – 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 95573’s chill hours and zone:

How many chill hours does 95573 get?
95573 averages 2187 chill hours per winter, ranging from 1700 to 2421 across the last 10 years.
What hardiness zone is 95573?
95573 is in USDA hardiness zone 9a.

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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