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Chill hours in 56557

The short answer

56557 averages 975 chill hours per winter (7071,270 across 10 years) in USDA zone 4a.
56557 climate
Average chill hours975 (707–1,270 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 28 – May 19
First fall frosttypically October 10 – October 21

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 56557’s chill hours and zone:

Marginal (1)

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

Marginal varieties for this location
VarietyFruit
ReliancePeach
How many chill hours does 56557 get?
56557 averages 975 chill hours per winter, ranging from 707 to 1270 across the last 10 years.
What hardiness zone is 56557?
56557 is in USDA hardiness zone 4a.

Growing fruit trees in 56557? Get a care calendar anchored to this exact climate, with email reminders.

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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