How many chill hours does 71031 get?

71031 averages 706 chill hours per winter, ranging from 372 to 881 across the last 10 years.

What hardiness zone is 71031?

71031 is in USDA hardiness zone 8b.

Location almanac

The short answer

71031 averages 706 chill hours per winter (372–881 across 10 years) in USDA zone 8b.

71031 climate
Average chill hours	706 (372–881 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically January 24 – March 13
First fall frost	typically November 15 – December 9

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 71031’s chill hours and zone:

Chill and zone requirements are comfortably met in 71031.

Show 95 more good fit varieties

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

How many chill hours does 71031 get?: 71031 averages 706 chill hours per winter, ranging from 372 to 881 across the last 10 years.
What hardiness zone is 71031?: 71031 is in USDA hardiness zone 8b.

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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