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Chill hours in 93723

The short answer

93723 averages 985 chill hours per winter (8281,454 across 10 years) in USDA zone 9b.
93723 climate
Average chill hours985 (828–1,454 across 10 winters)
USDA hardiness zone9b
Last spring frosttypically January 12 – February 25
First fall frosttypically November 21 – December 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 93723’s chill hours and zone:

How many chill hours does 93723 get?
93723 averages 985 chill hours per winter, ranging from 828 to 1454 across the last 10 years.
What hardiness zone is 93723?
93723 is in USDA hardiness zone 9b.

Growing fruit trees in 93723? 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