How many chill hours does 80430 get?

80430 averages 1055 chill hours per winter, ranging from 738 to 1391 across the last 10 years.

What hardiness zone is 80430?

80430 is in USDA hardiness zone 4b.

Location almanac

The short answer

80430 averages 1,055 chill hours per winter (738–1,391 across 10 years) in USDA zone 4b.

80430 climate
Average chill hours	1,055 (738–1,391 across 10 winters)
USDA hardiness zone	4b
Last spring frost	typically May 20 – June 10
First fall frost	typically September 11 – October 7

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 80430’s chill hours and zone:

Chill and zone requirements are comfortably met in 80430.

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How many chill hours does 80430 get?: 80430 averages 1055 chill hours per winter, ranging from 738 to 1391 across the last 10 years.
What hardiness zone is 80430?: 80430 is in USDA hardiness zone 4b.

Growing fruit trees in 80430? Get a care calendar anchored to this exact climate, with email reminders.

[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