How many chill hours does 99771 get?

99771 averages 963 chill hours per winter, ranging from 800 to 1354 across the last 10 years.

What hardiness zone is 99771?

99771 is in USDA hardiness zone 3b.

Location almanac

The short answer

99771 averages 963 chill hours per winter (800–1,354 across 10 years) in USDA zone 3b.

99771 climate
Average chill hours	963 (800–1,354 across 10 winters)
USDA hardiness zone	3b
Last spring frost	typically May 6 – May 29
First fall frost	typically September 22 – October 17

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 99771’s chill hours and zone:

Chill and zone requirements are comfortably met in 99771.

Show 41 more good fit varieties

How many chill hours does 99771 get?: 99771 averages 963 chill hours per winter, ranging from 800 to 1354 across the last 10 years.
What hardiness zone is 99771?: 99771 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