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Chill hours in 99171

The short answer

99171 averages 1,994 chill hours per winter (1,4942,487 across 10 years) in USDA zone 6b.
99171 climate
Average chill hours1,994 (1,494–2,487 across 10 winters)
USDA hardiness zone6b
Last spring frosttypically March 30 – April 22
First fall frosttypically October 11 – 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 99171’s chill hours and zone:

Good fit (156)

Chill and zone requirements are comfortably met in 99171.

Good fit varieties for this location
VarietyFruit
Acey MacApple
AkaneApple
AnnaApple
Arkansas BlackApple
BraeburnApple
CameoApple
CandyCrispApple
CortlandApple
Cox's Orange PippinApple
CrimsonCrispApple
Dorsett GoldenApple
EarligoldApple
EmpireApple
FortuneApple
FujiApple
GalaApple
Ginger GoldApple
GoldRushApple
Golden DeliciousApple
Golden SupremeApple
Granny SmithApple
GravensteinApple
HoneycrispApple
IdaredApple
JonagoldApple
JonamacApple
JonathanApple
LibertyApple
LodiApple
McIntoshApple
Show 126 more good fit varieties
How many chill hours does 99171 get?
99171 averages 1994 chill hours per winter, ranging from 1494 to 2487 across the last 10 years.
What hardiness zone is 99171?
99171 is in USDA hardiness zone 6b.

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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