How many chill hours does 99666 get?

99666 averages 1198 chill hours per winter, ranging from 811 to 1410 across the last 10 years.

What hardiness zone is 99666?

99666 is in USDA hardiness zone 4a.

Location almanac

The short answer

99666 averages 1,198 chill hours per winter (811–1,410 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 99666’s chill hours and zone:

Chill and zone requirements are comfortably met in 99666.

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How many chill hours does 99666 get?: 99666 averages 1198 chill hours per winter, ranging from 811 to 1410 across the last 10 years.
What hardiness zone is 99666?: 99666 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