How many chill hours does 99712 get?

99712 averages 635 chill hours per winter, ranging from 343 to 1036 across the last 10 years.

What hardiness zone is 99712?

99712 is in USDA hardiness zone 3b.

Location almanac

The short answer

99712 averages 635 chill hours per winter (343–1,036 across 10 years) in USDA zone 3b.

99712 climate
Average chill hours	635 (343–1,036 across 10 winters)
USDA hardiness zone	3b
Last spring frost	typically May 7 – May 29
First fall frost	typically September 4 – September 20

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 99712’s chill hours and zone:

Chill and zone requirements are comfortably met in 99712.

Show 15 more good fit varieties

Possible in a good year or a favorable microclimate — click through for the caveats.

How many chill hours does 99712 get?: 99712 averages 635 chill hours per winter, ranging from 343 to 1036 across the last 10 years.
What hardiness zone is 99712?: 99712 is in USDA hardiness zone 3b.

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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