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Chill hours in 55786

The short answer

55786 averages 996 chill hours per winter (7351,296 across 10 years) in USDA zone 4a.
55786 climate
Average chill hours996 (735–1,296 across 10 winters)
USDA hardiness zone4a
Last spring frosttypically April 26 – May 13
First fall frosttypically October 16 – 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 55786’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 55786 get?
55786 averages 996 chill hours per winter, ranging from 735 to 1296 across the last 10 years.
What hardiness zone is 55786?
55786 is in USDA hardiness zone 4a.

Growing fruit trees in 55786? 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