ZIP 63376 Zone 6b

Missouri · USDA zone 6b, average annual extreme minimum -5°F to 0°F.

Nearest qualified station: ST PETERS 2 SE, MO US (USC00237475), 2.6 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 9. Median first 32°F is October 26. The 50% growing-season length is 198 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 27Earlier date. A last 32°F on or after this day is common.
50%April 9Median.
10%April 25Later 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 14Earlier date. A first 32°F on or before this day is uncommon.
50%October 26Median.
90%November 7Later 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%219
50%198
90%178

28°F threshold

10%50%90%
Last, on or afterApril 14March 31March 12
First, on or beforeOctober 25November 5November 22
Season at least243 days221 days200 days

36°F threshold

10%50%90%
Last, on or afterMay 8April 23April 7
First, on or beforeOctober 4October 17October 27
Season at least193 days174 days156 days

Station ST PETERS 2 SE, MO US (USC00237475). Completeness flag R, 14 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 175.3 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Missouri cities