ZIP 88230 Zone 7b

New Mexico · USDA zone 7b, average annual extreme minimum 5°F to 10°F.

Nearest qualified station: ROSWELL IND AIR PK, NM US (USW00023009), 8.8 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is March 29. Median first 32°F is November 7. The 50% growing-season length is 223 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%March 8Earlier date. A last 32°F on or after this day is common.
50%March 29Median.
10%April 15Later 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%October 26Earlier date. A first 32°F on or before this day is uncommon.
50%November 7Median.
90%November 19Later 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%247
50%223
90%200

28°F threshold

10%50%90%
Last, on or afterApril 1March 10February 21
First, on or beforeNovember 2November 16December 1
Season at least272 days250 days223 days

36°F threshold

10%50%90%
Last, on or afterApril 24April 9March 25
First, on or beforeOctober 19October 30November 10
Season at least222 days202 days184 days

Station ROSWELL IND AIR PK, NM US (USW00023009). Completeness flag S, 26 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 1112.2 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · New Mexico cities