ZIP 78154 Zone 9a

Texas · USDA zone 9a, average annual extreme minimum 20°F to 25°F.

Nearest qualified station: NEW BRAUNFELS, TX US (USC00416276), 9.8 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is March 8. Median first 32°F is November 18. The 50% growing-season length is 253 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%February 17Earlier date. A last 32°F on or after this day is common.
50%March 8Median.
10%April 1Later 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 2Earlier date. A first 32°F on or before this day is uncommon.
50%November 18Median.
90%December 10Later 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%287
50%253
90%223

28°F threshold

10%50%90%
Last, on or afterMarch 17February 24January 29
First, on or beforeNovember 10December 2January 8
Season at least319 days284 days251 days

36°F threshold

10%50%90%
Last, on or afterApril 18March 25February 28
First, on or beforeOctober 25November 7November 25
Season at least256 days227 days200 days

Station NEW BRAUNFELS, TX US (USC00416276). Completeness flag R, 22 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 219.5 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

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