How many chill hours does 18704 get?

18704 averages 1734 chill hours per winter, ranging from 1439 to 2036 across the last 10 years.

What hardiness zone is 18704?

18704 is in USDA hardiness zone 6b.

Location almanac

The short answer

18704 averages 1,734 chill hours per winter (1,439–2,036 across 10 years) in USDA zone 6b.

18704 climate
Average chill hours	1,734 (1,439–2,036 across 10 winters)
USDA hardiness zone	6b
Last spring frost	typically April 9 – April 29
First fall frost	typically November 1 – November 14

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 18704’s chill hours and zone:

Chill and zone requirements are comfortably met in 18704.

Show 126 more good fit varieties

How many chill hours does 18704 get?: 18704 averages 1734 chill hours per winter, ranging from 1439 to 2036 across the last 10 years.
What hardiness zone is 18704?: 18704 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