How many chill hours does 99530 get?

99530 averages 1362 chill hours per winter, ranging from 767 to 2040 across the last 10 years.

What hardiness zone is 99530?

99530 is in USDA hardiness zone 5b.

Location almanac

The short answer

99530 averages 1,362 chill hours per winter (767–2,040 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 99530’s chill hours and zone:

Chill and zone requirements are comfortably met in 99530.

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How many chill hours does 99530 get?: 99530 averages 1362 chill hours per winter, ranging from 767 to 2040 across the last 10 years.
What hardiness zone is 99530?: 99530 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