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Chill hours in 56521

The short answer

56521 averages 959 chill hours per winter (6491,246 across 10 years) in USDA zone 4a.
56521 climate
Average chill hours959 (649–1,246 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 29 – May 15
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 56521’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 56521 get?
56521 averages 959 chill hours per winter, ranging from 649 to 1246 across the last 10 years.
What hardiness zone is 56521?
56521 is in USDA hardiness zone 4a.

Growing fruit trees in 56521? 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