How many chill hours does 99506 get?

99506 averages 1428 chill hours per winter, ranging from 841 to 2178 across the last 10 years.

What hardiness zone is 99506?

99506 is in USDA hardiness zone 5a.

Location almanac

The short answer

99506 averages 1,428 chill hours per winter (841–2,178 across 10 years) in USDA zone 5a.

99506 climate
Average chill hours	1,428 (841–2,178 across 10 winters)
USDA hardiness zone	5a
Last spring frost	typically May 3 – May 13
First fall frost	typically September 25 – October 14

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 99506’s chill hours and zone:

Chill and zone requirements are comfortably met in 99506.

Show 122 more good fit varieties

How many chill hours does 99506 get?: 99506 averages 1428 chill hours per winter, ranging from 841 to 2178 across the last 10 years.
What hardiness zone is 99506?: 99506 is in USDA hardiness zone 5a.

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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