How many chill hours does 18972 get?

18972 averages 1705 chill hours per winter, ranging from 1396 to 2004 across the last 10 years.

What hardiness zone is 18972?

18972 is in USDA hardiness zone 6b.

Location almanac

The short answer

18972 averages 1,705 chill hours per winter (1,396–2,004 across 10 years) in USDA zone 6b.

18972 climate
Average chill hours	1,705 (1,396–2,004 across 10 winters)
USDA hardiness zone	6b
Last spring frost	typically March 30 – April 25
First fall frost	typically November 1 – November 15

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 18972’s chill hours and zone:

Chill and zone requirements are comfortably met in 18972.

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How many chill hours does 18972 get?: 18972 averages 1705 chill hours per winter, ranging from 1396 to 2004 across the last 10 years.
What hardiness zone is 18972?: 18972 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