How many chill hours does 99566 get?

99566 averages 739 chill hours per winter, ranging from 422 to 1159 across the last 10 years.

What hardiness zone is 99566?

99566 is in USDA hardiness zone 4b.

Location almanac

The short answer

99566 averages 739 chill hours per winter (422–1,159 across 10 years) in USDA zone 4b.

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 99566’s chill hours and zone:

Chill and zone requirements are comfortably met in 99566.

Show 58 more good fit varieties

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

Show 2 more marginal varieties

How many chill hours does 99566 get?: 99566 averages 739 chill hours per winter, ranging from 422 to 1159 across the last 10 years.
What hardiness zone is 99566?: 99566 is in USDA hardiness zone 4b.

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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