How many chill hours does 18328 get?

18328 averages 1625 chill hours per winter, ranging from 1370 to 1912 across the last 10 years.

What hardiness zone is 18328?

18328 is in USDA hardiness zone 6b.

Location almanac

The short answer

18328 averages 1,625 chill hours per winter (1,370–1,912 across 10 years) in USDA zone 6b.

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 18328’s chill hours and zone:

Chill and zone requirements are comfortably met in 18328.

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How many chill hours does 18328 get?: 18328 averages 1625 chill hours per winter, ranging from 1370 to 1912 across the last 10 years.
What hardiness zone is 18328?: 18328 is in USDA hardiness zone 6b.

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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