How many chill hours does 05901 get?

05901 averages 1002 chill hours per winter, ranging from 767 to 1430 across the last 10 years.

What hardiness zone is 05901?

05901 is in USDA hardiness zone 4a.

Location almanac

The short answer

05901 averages 1,002 chill hours per winter (767–1,430 across 10 years) in USDA zone 4a.

05901 climate
Average chill hours	1,002 (767–1,430 across 10 winters)
USDA hardiness zone	4a
Last spring frost	typically May 9 – May 23
First fall frost	typically September 27 – 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 05901’s chill hours and zone:

Chill and zone requirements are comfortably met in 05901.

Show 90 more good fit varieties

How many chill hours does 05901 get?: 05901 averages 1002 chill hours per winter, ranging from 767 to 1430 across the last 10 years.
What hardiness zone is 05901?: 05901 is in USDA hardiness zone 4a.

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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