ZIP 68114 Zone 6a

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

Nearest qualified station: OMAHA #1, NE US (USW00094918), 6.4 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 16. Median first 32°F is October 18. The 50% growing-season length is 183 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 2Earlier date. A last 32°F on or after this day is common.
50%April 16Median.
10%May 6Later 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 2Earlier date. A first 32°F on or before this day is uncommon.
50%October 18Median.
90%October 29Later 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%183
90%159

28°F threshold

10%50%90%
Last, on or afterApril 22April 5March 23
First, on or beforeOctober 13October 26November 8
Season at least222 days204 days184 days

36°F threshold

10%50%90%
Last, on or afterMay 17May 2April 12
First, on or beforeSeptember 25October 9October 21
Season at least182 days160 days139 days

Station OMAHA #1, NE US (USW00094918). Completeness flag R, 11 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 390.1 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Nebraska cities