How many chill hours does 80721 get?

80721 averages 1480 chill hours per winter, ranging from 1209 to 1711 across the last 10 years.

What hardiness zone is 80721?

80721 is in USDA hardiness zone 5b.

Location almanac

The short answer

80721 averages 1,480 chill hours per winter (1,209–1,711 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 80721’s chill hours and zone:

Chill and zone requirements are comfortably met in 80721.

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How many chill hours does 80721 get?: 80721 averages 1480 chill hours per winter, ranging from 1209 to 1711 across the last 10 years.
What hardiness zone is 80721?: 80721 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