ZIP 54302 Zone 5b

Wisconsin · USDA zone 5b, average annual extreme minimum -15°F to -10°F.

Nearest qualified station: GREEN BAY BOTANICAL, WI US (USC00473271), 6.3 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is May 7. Median first 32°F is October 9. The 50% growing-season length is 154 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 24Earlier date. A last 32°F on or after this day is common.
50%May 7Median.
10%May 22Later 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%September 23Earlier date. A first 32°F on or before this day is uncommon.
50%October 9Median.
90%October 25Later 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%176
50%154
90%134

28°F threshold

10%50%90%
Last, on or afterMay 12April 27April 10
First, on or beforeOctober 5October 25November 7
Season at least203 days180 days157 days

36°F threshold

10%50%90%
Last, on or afterMay 31May 19May 4
First, on or beforeSeptember 15September 28October 12
Season at least152 days132 days113 days

Station GREEN BAY BOTANICAL, WI US (USC00473271). Completeness flag R, 19 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 211.5 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Wisconsin cities