How many chill hours does 98640 get?

98640 averages 1705 chill hours per winter, ranging from 1446 to 2173 across the last 10 years.

What hardiness zone is 98640?

98640 is in USDA hardiness zone 9a.

Location almanac

The short answer

98640 averages 1,705 chill hours per winter (1,446–2,173 across 10 years) in USDA zone 9a.

98640 climate
Average chill hours	1,705 (1,446–2,173 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 3 – March 11
First fall frost	typically November 30 – December 27

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 98640’s chill hours and zone:

Chill and zone requirements are comfortably met in 98640.

Show 87 more good fit varieties

How many chill hours does 98640 get?: 98640 averages 1705 chill hours per winter, ranging from 1446 to 2173 across the last 10 years.
What hardiness zone is 98640?: 98640 is in USDA hardiness zone 9a.

Growing fruit trees in 98640? Get a care calendar anchored to this exact climate, with email reminders.

[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