How many chill hours does 59638 get?

59638 averages 1364 chill hours per winter, ranging from 902 to 1680 across the last 10 years.

What hardiness zone is 59638?

59638 is in USDA hardiness zone 4b.

Location almanac

The short answer

59638 averages 1,364 chill hours per winter (902–1,680 across 10 years) in USDA zone 4b.

59638 climate
Average chill hours	1,364 (902–1,680 across 10 winters)
USDA hardiness zone	4b
Last spring frost	typically May 24 – June 21
First fall frost	typically September 14 – October 23

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 59638’s chill hours and zone:

Chill and zone requirements are comfortably met in 59638.

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How many chill hours does 59638 get?: 59638 averages 1364 chill hours per winter, ranging from 902 to 1680 across the last 10 years.
What hardiness zone is 59638?: 59638 is in USDA hardiness zone 4b.

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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