How many chill hours does 99602 get?

99602 averages 1052 chill hours per winter, ranging from 753 to 1268 across the last 10 years.

What hardiness zone is 99602?

99602 is in USDA hardiness zone 3a.

Location almanac

The short answer

99602 averages 1,052 chill hours per winter (753–1,268 across 10 years) in USDA zone 3a.

99602 climate
Average chill hours	1,052 (753–1,268 across 10 winters)
USDA hardiness zone	3a
Last spring frost	typically May 4 – May 19
First fall frost	typically September 19 – 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 99602’s chill hours and zone:

Chill and zone requirements are comfortably met in 99602.

Show 41 more good fit varieties

How many chill hours does 99602 get?: 99602 averages 1052 chill hours per winter, ranging from 753 to 1268 across the last 10 years.
What hardiness zone is 99602?: 99602 is in USDA hardiness zone 3a.

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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