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Chill hours in 99675

The short answer

99675 averages 949 chill hours per winter (7361,222 across 10 years) in USDA zone 2a.
99675 climate
Average chill hours949 (736–1,222 across 10 winters)
USDA hardiness zone2a
Last spring frosttypically May 2 – May 19
First fall frosttypically September 18 – October 8

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 99675’s chill hours and zone:

How many chill hours does 99675 get?
99675 averages 949 chill hours per winter, ranging from 736 to 1222 across the last 10 years.
What hardiness zone is 99675?
99675 is in USDA hardiness zone 2a.

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Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026