ZIP 94063 Zone 10a

California · USDA zone 10a, average annual extreme minimum 30°F to 35°F.

Nearest qualified station: REDWOOD CITY, CA US (USC00047339), 2.6 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is January 17. Median first 32°F is December 12. The 50% growing-season length is 333 days. The green band runs from the median last frost to the median first frost. Thin ticks mark the 10%, 50%, and 90% dates.

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

Last 32°F in spring

NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.

ProbabilityDateHow to read it
90%December 20Earlier date. A last 32°F on or after this day is common.
50%January 17Median.
10%February 16Later date. A last 32°F on or after this day is uncommon.

First 32°F in fall

NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.

ProbabilityDateHow to read it
10%November 24Earlier date. A first 32°F on or before this day is uncommon.
50%December 12Median.
90%January 14Later date. A first 32°F on or before this day is common.

32°F growing-season length

Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.

Probability the season is at least this longDays
10%365
50%333
90%298

28°F threshold

10%50%90%
Last, on or afterJanuary 22December 31December 14
First, on or beforeDecember 5December 26January 15
Season at least365 days365 days341 days

36°F threshold

10%50%90%
Last, on or afterMarch 31February 25January 25
First, on or beforeNovember 8November 25December 14
Season at least309 days272 days241 days

Station REDWOOD CITY, CA US (USC00047339). Completeness flag S, 29 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 88.1%. Freeze dates are conditional on that threshold occurring. Elevation 9.4 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · California cities