How many chill hours does 80420 get?

80420 averages 596 chill hours per winter, ranging from 453 to 783 across the last 10 years.

What hardiness zone is 80420?

80420 is in USDA hardiness zone 5a.

Location almanac

The short answer

80420 averages 596 chill hours per winter (453–783 across 10 years) in USDA zone 5a.

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 80420’s chill hours and zone:

Chill and zone requirements are comfortably met in 80420.

Show 63 more good fit varieties

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

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How many chill hours does 80420 get?: 80420 averages 596 chill hours per winter, ranging from 453 to 783 across the last 10 years.
What hardiness zone is 80420?: 80420 is in USDA hardiness zone 5a.

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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