How many chill hours does 97147 get?

97147 averages 1646 chill hours per winter, ranging from 1282 to 2180 across the last 10 years.

What hardiness zone is 97147?

97147 is in USDA hardiness zone 9a.

Location almanac

The short answer

97147 averages 1,646 chill hours per winter (1,282–2,180 across 10 years) in USDA zone 9a.

97147 climate
Average chill hours	1,646 (1,282–2,180 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically February 27 – April 14
First fall frost	typically November 28 – December 21

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 97147’s chill hours and zone:

Chill and zone requirements are comfortably met in 97147.

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How many chill hours does 97147 get?: 97147 averages 1646 chill hours per winter, ranging from 1282 to 2180 across the last 10 years.
What hardiness zone is 97147?: 97147 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