How many chill hours does 18618 get?

18618 averages 1623 chill hours per winter, ranging from 1321 to 1933 across the last 10 years.

What hardiness zone is 18618?

18618 is in USDA hardiness zone 6a.

Location almanac

The short answer

18618 averages 1,623 chill hours per winter (1,321–1,933 across 10 years) in USDA zone 6a.

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 18618’s chill hours and zone:

Chill and zone requirements are comfortably met in 18618.

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How many chill hours does 18618 get?: 18618 averages 1623 chill hours per winter, ranging from 1321 to 1933 across the last 10 years.
What hardiness zone is 18618?: 18618 is in USDA hardiness zone 6a.

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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