How many chill hours does 97707 get?

97707 averages 2045 chill hours per winter, ranging from 1558 to 2268 across the last 10 years.

What hardiness zone is 97707?

97707 is in USDA hardiness zone 6a.

Location almanac

The short answer

97707 averages 2,045 chill hours per winter (1,558–2,268 across 10 years) in USDA zone 6a.

97707 climate
Average chill hours	2,045 (1,558–2,268 across 10 winters)
USDA hardiness zone	6a
Last spring frost	typically May 21 – June 19
First fall frost	typically September 22 – October 24

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 97707’s chill hours and zone:

Chill and zone requirements are comfortably met in 97707.

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How many chill hours does 97707 get?: 97707 averages 2045 chill hours per winter, ranging from 1558 to 2268 across the last 10 years.
What hardiness zone is 97707?: 97707 is in USDA hardiness zone 6a.

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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