How many chill hours does 99657 get?

99657 averages 1050 chill hours per winter, ranging from 781 to 1306 across the last 10 years.

What hardiness zone is 99657?

99657 is in USDA hardiness zone 3b.

Location almanac

The short answer

99657 averages 1,050 chill hours per winter (781–1,306 across 10 years) in USDA zone 3b.

99657 climate
Average chill hours	1,050 (781–1,306 across 10 winters)
USDA hardiness zone	3b
Last spring frost	typically May 5 – May 31
First fall frost	typically September 20 – September 29

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 99657’s chill hours and zone:

Chill and zone requirements are comfortably met in 99657.

Show 41 more good fit varieties

How many chill hours does 99657 get?: 99657 averages 1050 chill hours per winter, ranging from 781 to 1306 across the last 10 years.
What hardiness zone is 99657?: 99657 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