How many chill hours does 99755 get?

99755 averages 285 chill hours per winter, ranging from 148 to 421 across the last 10 years.

What hardiness zone is 99755?

99755 is in USDA hardiness zone 3b.

Location almanac

The short answer

99755 averages 285 chill hours per winter (148–421 across 10 years) in USDA zone 3b.

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 99755’s chill hours and zone:

Chill and zone requirements are comfortably met in 99755.

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

How many chill hours does 99755 get?: 99755 averages 285 chill hours per winter, ranging from 148 to 421 across the last 10 years.
What hardiness zone is 99755?: 99755 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