ZIP 48825 Zone 6a

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

Nearest qualified station: EAST LANSING 4 S, MI US (USC00202395), 4 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 28. Median first 32°F is October 17. The 50% growing-season length is 173 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 13Earlier date. A last 32°F on or after this day is common.
50%April 28Median.
10%May 16Later 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 1Earlier date. A first 32°F on or before this day is uncommon.
50%October 17Median.
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%194
50%173
90%150

28°F threshold

10%50%90%
Last, on or afterMay 1April 15April 2
First, on or beforeOctober 14October 30November 13
Season at least219 days198 days175 days

36°F threshold

10%50%90%
Last, on or afterMay 27May 8April 23
First, on or beforeSeptember 22October 4October 18
Season at least172 days149 days127 days

Station EAST LANSING 4 S, MI US (USC00202395). Completeness flag R, 16 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 268.2 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Michigan cities