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Chill hours in 56636

The short answer

56636 averages 987 chill hours per winter (7301,281 across 10 years) in USDA zone 3b.
56636 climate
Average chill hours987 (730–1,281 across 10 winters)
USDA hardiness zone3b
Last spring frosttypically April 26 – May 13
First fall frosttypically October 15 – November 13

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 56636’s chill hours and zone:

How many chill hours does 56636 get?
56636 averages 987 chill hours per winter, ranging from 730 to 1281 across the last 10 years.
What hardiness zone is 56636?
56636 is in USDA hardiness zone 3b.

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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