ZIP 65101 Zone 6b

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

Nearest qualified station: JEFFERSON CITY MEM AP, MO US (USW00003963), 6.6 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 10. 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 26Earlier date. A last 32°F on or after this day is common.
50%April 10Median.
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 13Earlier date. A first 32°F on or before this day is uncommon.
50%October 26Median.
90%November 5Later 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%218
50%198
90%178

28°F threshold

10%50%90%
Last, on or afterApril 15March 31March 13
First, on or beforeOctober 23November 4November 18
Season at least240 days220 days200 days

36°F threshold

10%50%90%
Last, on or afterMay 8April 22April 7
First, on or beforeOctober 1October 16October 27
Season at least196 days176 days155 days

Station JEFFERSON CITY MEM AP, MO US (USW00003963). Completeness flag R, 21 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 174.7 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