How many chill hours does 99645 get?

99645 averages 1031 chill hours per winter, ranging from 743 to 1368 across the last 10 years.

What hardiness zone is 99645?

99645 is in USDA hardiness zone 5a.

Location almanac

The short answer

99645 averages 1,031 chill hours per winter (743–1,368 across 10 years) in USDA zone 5a.

99645 climate
Average chill hours	1,031 (743–1,368 across 10 winters)
USDA hardiness zone	5a
Last spring frost	typically May 8 – May 30
First fall frost	typically September 20 – October 11

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 99645’s chill hours and zone:

Chill and zone requirements are comfortably met in 99645.

Show 69 more good fit varieties

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

Show 6 more marginal varieties

How many chill hours does 99645 get?: 99645 averages 1031 chill hours per winter, ranging from 743 to 1368 across the last 10 years.
What hardiness zone is 99645?: 99645 is in USDA hardiness zone 5a.

Growing fruit trees in 99645? Save your first tree free and see this month’s care tasks for this climate.

As an Amazon Associate we earn from qualifying purchases.

[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