How many chill hours does 99610 get?

99610 averages 1545 chill hours per winter, ranging from 879 to 2392 across the last 10 years.

What hardiness zone is 99610?

99610 is in USDA hardiness zone 4b.

Location almanac

The short answer

99610 averages 1,545 chill hours per winter (879–2,392 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 99610’s chill hours and zone:

Chill and zone requirements are comfortably met in 99610.

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How many chill hours does 99610 get?: 99610 averages 1545 chill hours per winter, ranging from 879 to 2392 across the last 10 years.
What hardiness zone is 99610?: 99610 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