ZIP 24540 Zone 7b

Virginia · USDA zone 7b, average annual extreme minimum 5°F to 10°F.

Nearest qualified station: DANVILLE 2 SE, VA US (USC00442245), 6.1 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is April 8. Median first 32°F is November 1. The 50% growing-season length is 205 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%March 22Earlier date. A last 32°F on or after this day is common.
50%April 8Median.
10%April 30Later 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 19Earlier date. A first 32°F on or before this day is uncommon.
50%November 1Median.
90%November 13Later 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%226
50%205
90%183

28°F threshold

10%50%90%
Last, on or afterApril 10March 27March 8
First, on or beforeOctober 29November 10November 27
Season at least251 days229 days208 days

36°F threshold

10%50%90%
Last, on or afterMay 8April 21April 5
First, on or beforeOctober 11October 23November 3
Season at least204 days183 days163 days

Station DANVILLE 2 SE, VA US (USC00442245). Completeness flag R, 23 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 119.5 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Methodology · Virginia cities