How many chill hours does 80440 get?

80440 averages 797 chill hours per winter, ranging from 631 to 988 across the last 10 years.

What hardiness zone is 80440?

80440 is in USDA hardiness zone 5b.

Location almanac

The short answer

80440 averages 797 chill hours per winter (631–988 across 10 years) in USDA zone 5b.

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 80440’s chill hours and zone:

Chill and zone requirements are comfortably met in 80440.

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

How many chill hours does 80440 get?: 80440 averages 797 chill hours per winter, ranging from 631 to 988 across the last 10 years.
What hardiness zone is 80440?: 80440 is in USDA hardiness zone 5b.

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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