How many chill hours does 99738 get?

99738 averages 578 chill hours per winter, ranging from 275 to 844 across the last 10 years.

What hardiness zone is 99738?

99738 is in USDA hardiness zone 2b.

Location almanac

The short answer

99738 averages 578 chill hours per winter (275–844 across 10 years) in USDA zone 2b.

99738 climate
Average chill hours	578 (275–844 across 10 winters)
USDA hardiness zone	2b
Last spring frost	typically May 12 – May 28
First fall frost	typically September 3 – September 24

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 99738’s chill hours and zone:

Chill and zone requirements are comfortably met in 99738.

Show 3 more good fit varieties

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

How many chill hours does 99738 get?: 99738 averages 578 chill hours per winter, ranging from 275 to 844 across the last 10 years.
What hardiness zone is 99738?: 99738 is in USDA hardiness zone 2b.

Growing fruit trees in 99738? 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