ZIP 55044 Zone 4b

Minnesota · USDA zone 4b, average annual extreme minimum -25°F to -20°F.

Nearest qualified station: FARMINGTON 3 NW, MN US (USC00212737), 5.6 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 27. Median first 32°F is October 10. The 50% growing-season length is 166 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 12Earlier date. A last 32°F on or after this day is common.
50%April 27Median.
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%September 27Earlier date. A first 32°F on or before this day is uncommon.
50%October 10Median.
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%186
50%166
90%147

28°F threshold

10%50%90%
Last, on or afterApril 29April 15April 2
First, on or beforeOctober 7October 22November 5
Season at least208 days189 days168 days

36°F threshold

10%50%90%
Last, on or afterMay 21May 7April 23
First, on or beforeSeptember 20October 2October 15
Season at least165 days147 days128 days

Station FARMINGTON 3 NW, MN US (USC00212737). 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 298.7 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Minnesota cities