How many chill hours does 98118 get?

98118 averages 2250 chill hours per winter, ranging from 2088 to 2532 across the last 10 years.

What hardiness zone is 98118?

98118 is in USDA hardiness zone 9a.

Location almanac

The short answer

98118 averages 2,250 chill hours per winter (2,088–2,532 across 10 years) in USDA zone 9a.

98118 climate
Average chill hours	2,250 (2,088–2,532 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically March 1 – March 27
First fall frost	typically November 12 – December 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 98118’s chill hours and zone:

Chill and zone requirements are comfortably met in 98118.

Show 87 more good fit varieties

How many chill hours does 98118 get?: 98118 averages 2250 chill hours per winter, ranging from 2088 to 2532 across the last 10 years.
What hardiness zone is 98118?: 98118 is in USDA hardiness zone 9a.

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[1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
[2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026