How many chill hours does 99591 get?

99591 averages 3152 chill hours per winter, ranging from 2537 to 4006 across the last 10 years.

What hardiness zone is 99591?

99591 is in USDA hardiness zone 7a.

Location almanac

The short answer

99591 averages 3,152 chill hours per winter (2,537–4,006 across 10 years) in USDA zone 7a.

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 99591’s chill hours and zone:

Chill and zone requirements are comfortably met in 99591.

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How many chill hours does 99591 get?: 99591 averages 3152 chill hours per winter, ranging from 2537 to 4006 across the last 10 years.
What hardiness zone is 99591?: 99591 is in USDA hardiness zone 7a.

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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