How many chill hours does 99146 get?

99146 averages 948 chill hours per winter, ranging from 632 to 1217 across the last 10 years.

What hardiness zone is 99146?

99146 is in USDA hardiness zone 6b.

Location almanac

The short answer

99146 averages 948 chill hours per winter (632–1,217 across 10 years) in USDA zone 6b.

99146 climate
Average chill hours	948 (632–1,217 across 10 winters)
USDA hardiness zone	6b
Last spring frost	typically May 28 – June 18
First fall frost	typically September 16 – October 1

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 99146’s chill hours and zone:

Chill and zone requirements are comfortably met in 99146.

Show 124 more good fit varieties

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

Marginal varieties for this location
Variety	Fruit
Rome Beauty	Apple
Reliance	Peach

How many chill hours does 99146 get?: 99146 averages 948 chill hours per winter, ranging from 632 to 1217 across the last 10 years.
What hardiness zone is 99146?: 99146 is in USDA hardiness zone 6b.

Growing fruit trees in 99146? 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