How many chill hours does 18831 get?

18831 averages 1628 chill hours per winter, ranging from 1372 to 1927 across the last 10 years.

What hardiness zone is 18831?

18831 is in USDA hardiness zone 6a.

Location almanac

The short answer

18831 averages 1,628 chill hours per winter (1,372–1,927 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 18831’s chill hours and zone:

Chill and zone requirements are comfortably met in 18831.

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How many chill hours does 18831 get?: 18831 averages 1628 chill hours per winter, ranging from 1372 to 1927 across the last 10 years.
What hardiness zone is 18831?: 18831 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