How many chill hours does 99730 get?

99730 averages 591 chill hours per winter, ranging from 333 to 941 across the last 10 years.

What hardiness zone is 99730?

99730 is in USDA hardiness zone 3b.

Location almanac

The short answer

99730 averages 591 chill hours per winter (333–941 across 10 years) in USDA zone 3b.

99730 climate
Average chill hours	591 (333–941 across 10 winters)
USDA hardiness zone	3b
Last spring frost	typically May 20 – June 9
First fall frost	typically September 7 – September 21

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 99730’s chill hours and zone:

Chill and zone requirements are comfortably met in 99730.

Show 13 more good fit varieties

Possible in a good year or a favorable microclimate — click through for the caveats.

How many chill hours does 99730 get?: 99730 averages 591 chill hours per winter, ranging from 333 to 941 across the last 10 years.
What hardiness zone is 99730?: 99730 is in USDA hardiness zone 3b.

Growing fruit trees in 99730? Get a care calendar anchored to this exact climate, with email reminders.

[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