ZIP 43201 Zone 6b

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

Nearest qualified station: COLUMBUS WCMH, OH US (USC00331785), 2.7 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 20. Median first 32°F is October 24. The 50% growing-season length is 185 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%April 5Earlier date. A last 32°F on or after this day is common.
50%April 20Median.
10%May 7Later 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 24Median.
90%November 4Later 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%203
50%185
90%164

28°F threshold

10%50%90%
Last, on or afterApril 25April 8March 24
First, on or beforeOctober 22November 3November 16
Season at least229 days209 days189 days

36°F threshold

10%50%90%
Last, on or afterMay 19April 30April 17
First, on or beforeSeptember 29October 13October 25
Season at least182 days164 days144 days

Station COLUMBUS WCMH, OH US (USC00331785). Completeness flag R, 10 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 225.6 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Ohio cities