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Chill hours in 80449

The short answer

80449 averages 950 chill hours per winter (5931,512 across 10 years) in USDA zone 4a.
80449 climate
Average chill hours950 (593–1,512 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically May 10 – June 10
First fall frosttypically September 19 – October 13

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 80449’s chill hours and zone:

Marginal (1)

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

Marginal varieties for this location
VarietyFruit
ReliancePeach
How many chill hours does 80449 get?
80449 averages 950 chill hours per winter, ranging from 593 to 1512 across the last 10 years.
What hardiness zone is 80449?
80449 is in USDA hardiness zone 4a.

Growing fruit trees in 80449? Get a care calendar anchored to this exact climate, with email reminders.

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Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026