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Chill hours in 57242

The short answer

57242 averages 1,098 chill hours per winter (6931,273 across 10 years) in USDA zone 4b.
57242 climate
Average chill hours1,098 (693–1,273 across 10 winters)
USDA hardiness zone4b
Last spring frosttypically April 22 – May 11
First fall frosttypically October 7 – November 7

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 57242’s chill hours and zone:

How many chill hours does 57242 get?
57242 averages 1098 chill hours per winter, ranging from 693 to 1273 across the last 10 years.
What hardiness zone is 57242?
57242 is in USDA hardiness zone 4b.

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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