How many chill hours does 99575 get?

99575 averages 978 chill hours per winter, ranging from 766 to 1186 across the last 10 years.

What hardiness zone is 99575?

99575 is in USDA hardiness zone 3a.

Location almanac

The short answer

99575 averages 978 chill hours per winter (766–1,186 across 10 years) in USDA zone 3a.

99575 climate
Average chill hours	978 (766–1,186 across 10 winters)
USDA hardiness zone	3a
Last spring frost	typically May 6 – May 25
First fall frost	typically September 12 – September 28

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 99575’s chill hours and zone:

Chill and zone requirements are comfortably met in 99575.

Show 41 more good fit varieties

How many chill hours does 99575 get?: 99575 averages 978 chill hours per winter, ranging from 766 to 1186 across the last 10 years.
What hardiness zone is 99575?: 99575 is in USDA hardiness zone 3a.

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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