ZIP 46805 Zone 6a

Indiana · USDA zone 6a, average annual extreme minimum -10°F to -5°F.

Nearest qualified station: FT WAYNE INTL AP, IN US (USW00014827), 10.1 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 24. Median first 32°F is October 21. The 50% growing-season length is 178 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 10Earlier date. A last 32°F on or after this day is common.
50%April 24Median.
10%May 10Later 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 8Earlier date. A first 32°F on or before this day is uncommon.
50%October 21Median.
90%November 1Later 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%199
50%178
90%157

28°F threshold

10%50%90%
Last, on or afterApril 28April 12March 28
First, on or beforeOctober 19November 1November 16
Season at least222 days203 days182 days

36°F threshold

10%50%90%
Last, on or afterMay 18May 4April 20
First, on or beforeSeptember 25October 9October 22
Season at least176 days156 days138 days

Station FT WAYNE INTL AP, IN US (USW00014827). Completeness flag S, 30 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 241.1 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