How many chill hours does 99703 get?

99703 averages 751 chill hours per winter, ranging from 529 to 1075 across the last 10 years.

What hardiness zone is 99703?

99703 is in USDA hardiness zone 2a.

Location almanac

The short answer

99703 averages 751 chill hours per winter (529–1,075 across 10 years) in USDA zone 2a.

99703 climate
Average chill hours	751 (529–1,075 across 10 winters)
USDA hardiness zone	2a
Last spring frost	typically May 1 – May 17
First fall frost	typically September 21 – 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 99703’s chill hours and zone:

Chill and zone requirements are comfortably met in 99703.

Show 19 more good fit varieties

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

How many chill hours does 99703 get?: 99703 averages 751 chill hours per winter, ranging from 529 to 1075 across the last 10 years.
What hardiness zone is 99703?: 99703 is in USDA hardiness zone 2a.

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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