How many chill hours does 70578 get?

70578 averages 460 chill hours per winter, ranging from 227 to 564 across the last 10 years.

What hardiness zone is 70578?

70578 is in USDA hardiness zone 9a.

Location almanac

The short answer

70578 averages 460 chill hours per winter (227–564 across 10 years) in USDA zone 9a.

70578 climate
Average chill hours	460 (227–564 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 19 – March 6
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 70578’s chill hours and zone:

Chill and zone requirements are comfortably met in 70578.

Show 36 more good fit varieties

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

How many chill hours does 70578 get?: 70578 averages 460 chill hours per winter, ranging from 227 to 564 across the last 10 years.
What hardiness zone is 70578?: 70578 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