How many chill hours does 99590 get?

99590 averages 910 chill hours per winter, ranging from 766 to 1040 across the last 10 years.

What hardiness zone is 99590?

99590 is in USDA hardiness zone 3a.

Location almanac

The short answer

99590 averages 910 chill hours per winter (766–1,040 across 10 years) in USDA zone 3a.

99590 climate
Average chill hours	910 (766–1,040 across 10 winters)
USDA hardiness zone	3a
Last spring frost	typically May 6 – May 29
First fall frost	typically September 19 – September 29

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 99590’s chill hours and zone:

Chill and zone requirements are comfortably met in 99590.

Show 41 more good fit varieties

How many chill hours does 99590 get?: 99590 averages 910 chill hours per winter, ranging from 766 to 1040 across the last 10 years.
What hardiness zone is 99590?: 99590 is in USDA hardiness zone 3a.

Growing fruit trees in 99590? 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