How many chill hours does 99688 get?

99688 averages 1130 chill hours per winter, ranging from 699 to 1630 across the last 10 years.

What hardiness zone is 99688?

99688 is in USDA hardiness zone 3b.

Location almanac

The short answer

99688 averages 1,130 chill hours per winter (699–1,630 across 10 years) in USDA zone 3b.

99688 climate
Average chill hours	1,130 (699–1,630 across 10 winters)
USDA hardiness zone	3b
Last spring frost	typically May 13 – June 1
First fall frost	typically September 8 – 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 99688’s chill hours and zone:

Chill and zone requirements are comfortably met in 99688.

Show 41 more good fit varieties

How many chill hours does 99688 get?: 99688 averages 1130 chill hours per winter, ranging from 699 to 1630 across the last 10 years.
What hardiness zone is 99688?: 99688 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