ZIP 47405 Zone 6b

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

Nearest qualified station: BLOOMINGTON INDIANA UNIV, IN US (USC00120784), 0.5 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 15. Median first 32°F is October 26. The 50% growing-season length is 192 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 31Earlier date. A last 32°F on or after this day is common.
50%April 15Median.
10%May 3Later 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 11Earlier date. A first 32°F on or before this day is uncommon.
50%October 26Median.
90%November 9Later 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%214
50%192
90%169

28°F threshold

10%50%90%
Last, on or afterApril 22April 2March 19
First, on or beforeOctober 23November 4November 21
Season at least238 days216 days191 days

36°F threshold

10%50%90%
Last, on or afterMay 14April 28April 11
First, on or beforeOctober 1October 16October 28
Season at least192 days170 days149 days

Station BLOOMINGTON INDIANA UNIV, IN US (USC00120784). Completeness flag S, 28 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 253 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Indiana cities