How many chill hours does 99674 get?

99674 averages 122 chill hours per winter, ranging from 18 to 286 across the last 10 years.

What hardiness zone is 99674?

99674 is in USDA hardiness zone 4b.

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The short answer

99674 averages 122 chill hours per winter (18–286 across 10 years) in USDA zone 4b.

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 99674’s chill hours and zone:

Chill and zone requirements are comfortably met in 99674.

Show 2 more good fit varieties

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

How many chill hours does 99674 get?: 99674 averages 122 chill hours per winter, ranging from 18 to 286 across the last 10 years.
What hardiness zone is 99674?: 99674 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