How many chill hours does 99636 get?

99636 averages 1516 chill hours per winter, ranging from 866 to 2127 across the last 10 years.

What hardiness zone is 99636?

99636 is in USDA hardiness zone 4b.

Location almanac

The short answer

99636 averages 1,516 chill hours per winter (866–2,127 across 10 years) in USDA zone 4b.

99636 climate
Average chill hours	1,516 (866–2,127 across 10 winters)
USDA hardiness zone	4b
Last spring frost	typically May 3 – May 16
First fall frost	typically September 22 – October 12

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 99636’s chill hours and zone:

Chill and zone requirements are comfortably met in 99636.

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How many chill hours does 99636 get?: 99636 averages 1516 chill hours per winter, ranging from 866 to 2127 across the last 10 years.
What hardiness zone is 99636?: 99636 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