How many chill hours does 58321 get?

58321 averages 898 chill hours per winter, ranging from 506 to 1220 across the last 10 years.

What hardiness zone is 58321?

58321 is in USDA hardiness zone 4a.

Location almanac

The short answer

58321 averages 898 chill hours per winter (506–1,220 across 10 years) in USDA zone 4a.

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 58321’s chill hours and zone:

Chill and zone requirements are comfortably met in 58321.

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

How many chill hours does 58321 get?: 58321 averages 898 chill hours per winter, ranging from 506 to 1220 across the last 10 years.
What hardiness zone is 58321?: 58321 is in USDA hardiness zone 4a.

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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