How many chill hours does 97102 get?

97102 averages 2373 chill hours per winter, ranging from 2059 to 2814 across the last 10 years.

What hardiness zone is 97102?

97102 is in USDA hardiness zone 9a.

Location almanac

The short answer

97102 averages 2,373 chill hours per winter (2,059–2,814 across 10 years) in USDA zone 9a.

97102 climate
Average chill hours	2,373 (2,059–2,814 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically February 1 – April 14
First fall frost	typically November 9 – December 7

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 97102’s chill hours and zone:

Chill and zone requirements are comfortably met in 97102.

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How many chill hours does 97102 get?: 97102 averages 2373 chill hours per winter, ranging from 2059 to 2814 across the last 10 years.
What hardiness zone is 97102?: 97102 is in USDA hardiness zone 9a.

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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