How many chill hours does 99118 get?

99118 averages 1735 chill hours per winter, ranging from 1269 to 2140 across the last 10 years.

What hardiness zone is 99118?

99118 is in USDA hardiness zone 6a.

Location almanac

The short answer

99118 averages 1,735 chill hours per winter (1,269–2,140 across 10 years) in USDA zone 6a.

99118 climate
Average chill hours	1,735 (1,269–2,140 across 10 winters)
USDA hardiness zone	6a
Last spring frost	typically April 15 – May 15
First fall frost	typically September 30 – October 27

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 99118’s chill hours and zone:

Chill and zone requirements are comfortably met in 99118.

Show 126 more good fit varieties

How many chill hours does 99118 get?: 99118 averages 1735 chill hours per winter, ranging from 1269 to 2140 across the last 10 years.
What hardiness zone is 99118?: 99118 is in USDA hardiness zone 6a.

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[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