Yadkin County climate

Yadkin County Frost Dates and Growing Season

NOAA 1991-2020 normals for Yadkinville 6 E, 11 km from Yadkin County, elevation 875 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Yadkinville 6 E. A median date has an even chance of a later freeze in spring, or an earlier one in fall.

The last spring freeze typically comes around April 16 and the first fall freeze around October 25, a growing season of about 191 days.

Median at 36°F
last April 29, first October 16
Median at 32°F
last April 16, first October 25
Median at 28°F
last April 3, first November 3

Last freeze in spring

The chance of a later freeze than the date shown. At 10 percent, one spring in ten still freezes after the date; planting after the 10 percent date for 32°F is the cautious choice.

Threshold10%20%30%40%50%60%70%80%90%
36°FMay 14May 8May 4May 1Apr 29Apr 26Apr 22Apr 19Apr 14
32°FMay 3Apr 27Apr 22Apr 19Apr 16Apr 13Apr 10Apr 6Apr 1
28°FApr 18Apr 13Apr 9Apr 6Apr 3Mar 31Mar 29Mar 24Mar 17
24°FApr 6Apr 1Mar 30Mar 26Mar 21Mar 18Mar 15Mar 10Mar 3
20°FMar 28Mar 21Mar 17Mar 14Mar 10Mar 6Mar 2Feb 25Feb 15
16°FMar 17Mar 10Mar 6Mar 1Feb 25Feb 18Feb 10Feb 3Jan 27

First freeze in fall

The chance of an earlier freeze than the date shown. At 10 percent, one fall in ten freezes before the date.

Threshold10%20%30%40%50%60%70%80%90%
36°FOct 5Oct 9Oct 11Oct 14Oct 16Oct 19Oct 22Oct 25Oct 29
32°FOct 11Oct 16Oct 20Oct 23Oct 25Oct 28Oct 31Nov 2Nov 5
28°FOct 21Oct 26Oct 29Nov 1Nov 3Nov 5Nov 8Nov 12Nov 18
24°FNov 1Nov 4Nov 8Nov 11Nov 14Nov 17Nov 21Nov 26Dec 1
20°FNov 10Nov 15Nov 18Nov 22Nov 27Dec 1Dec 3Dec 8Dec 19
16°FNov 21Nov 29Dec 4Dec 7Dec 13Dec 20Dec 26Jan 1Jan 11

Growing season length

Days between the last spring and first fall freeze at each threshold, with the chance of a season at least that long.

Threshold10%20%30%40%50%60%70%80%90%
36°F190183178175171167163157149
32°F210203199194191187183178171
28°F233225221217213210206200194
24°F261253246241237232227221213
20°F294283276270263258253247239
16°F331319309302295289282275264

How often it gets that cold

The share of years with at least one night at or below each temperature.

36°F or colder
100% of years
32°F or colder
100% of years
28°F or colder
100% of years
24°F or colder
100% of years
20°F or colder
100% of years
16°F or colder
99% of years

Degree days

A degree day is one degree of the daily mean temperature beyond a base, for one day. Heating degree days count cold (the fuel a house burns), cooling degree days heat, growing degree days the warmth a crop needs; each crop has its own base.

Heating degree days, base 65°F
4,199
Cooling degree days, base 65°F
1,147
Growing degree days, base 40°F
6,537
Growing degree days, base 45°F
5,135
Growing degree days, base 50°F
3,901
Growing degree days, base 55°F
2,828
Growing degree days, base 60°F
1,908

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January88309
February710014
March563176
April28116219
May9980448
June10235675
July0354818
August1302766
September39139551
October26318246
November556161
December794018

What this means

NOAA computes these from the daily lows at the station over 1991-2020, fitting the dates of each year's last and first freeze to a distribution, so a date can be stated at any level of risk. 36°F is a frost risk for tender plants on a clear, calm night, since the ground cools below the air above it; 32°F is a freeze; 28°F is a hard freeze that kills most annuals.

The station is 11 km from Yadkin County. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

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Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00319675 (Yadkinville 6 E). Public domain.