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Chill hours in 97432

The short answer

97432 averages 1,895 chill hours per winter (1,6672,167 across 10 years) in USDA zone 9a.
97432 climate
Average chill hours1,895 (1,667–2,167 across 10 winters)
USDA hardiness zone9a
Last spring frosttypically March 1 – April 13
First fall frosttypically October 28 – November 28

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 97432’s chill hours and zone:

How many chill hours does 97432 get?
97432 averages 1895 chill hours per winter, ranging from 1667 to 2167 across the last 10 years.
What hardiness zone is 97432?
97432 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