How many chill hours does 71403 get?

71403 averages 585 chill hours per winter, ranging from 265 to 701 across the last 10 years.

What hardiness zone is 71403?

71403 is in USDA hardiness zone 9a.

Location almanac

The short answer

71403 averages 585 chill hours per winter (265–701 across 10 years) in USDA zone 9a.

71403 climate
Average chill hours	585 (265–701 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 19 – March 12
First fall frost	typically November 13 – December 23

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 71403’s chill hours and zone:

Chill and zone requirements are comfortably met in 71403.

Show 48 more good fit varieties

Possible in a good year or a favorable microclimate — click through for the caveats.

How many chill hours does 71403 get?: 71403 averages 585 chill hours per winter, ranging from 265 to 701 across the last 10 years.
What hardiness zone is 71403?: 71403 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