How many chill hours does 99778 get?

99778 averages 1070 chill hours per winter, ranging from 825 to 1340 across the last 10 years.

What hardiness zone is 99778?

99778 is in USDA hardiness zone 3a.

Location almanac

The short answer

99778 averages 1,070 chill hours per winter (825–1,340 across 10 years) in USDA zone 3a.

99778 climate
Average chill hours	1,070 (825–1,340 across 10 winters)
USDA hardiness zone	3a
Last spring frost	typically May 25 – June 10
First fall frost	typically September 16 – October 13

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 99778’s chill hours and zone:

Chill and zone requirements are comfortably met in 99778.

Show 41 more good fit varieties

How many chill hours does 99778 get?: 99778 averages 1070 chill hours per winter, ranging from 825 to 1340 across the last 10 years.
What hardiness zone is 99778?: 99778 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