ZIP 84010 Zone 6b

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

Nearest qualified station: BOUNTIFUL BENCH, UT US (USC00420819), 1.5 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 25. Median first 32°F is October 24. The 50% growing-season length is 181 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 5Earlier date. A last 32°F on or after this day is common.
50%April 25Median.
10%May 14Later 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 9Earlier date. A first 32°F on or before this day is uncommon.
50%October 24Median.
90%November 7Later 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%203
50%181
90%158

28°F threshold

10%50%90%
Last, on or afterApril 28April 5March 12
First, on or beforeOctober 20November 4November 18
Season at least234 days209 days181 days

36°F threshold

10%50%90%
Last, on or afterMay 31May 8April 23
First, on or beforeSeptember 30October 14October 27
Season at least177 days156 days130 days

Station BOUNTIFUL BENCH, UT US (USC00420819). Completeness flag S, 27 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 1508.8 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Utah cities