Laurelville climate

Laurelville Frost Dates and Growing Season

NOAA 1991-2020 normals for Circleville, 24 km from Laurelville, elevation 675 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Circleville. 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 17 and the first fall freeze around October 28, a growing season of about 192 days.

Median at 36°F
last April 28, first October 17
Median at 32°F
last April 17, first October 28
Median at 28°F
last April 4, first November 7

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 4Apr 30Apr 28Apr 24Apr 21Apr 18Apr 13
32°FMay 4Apr 29Apr 25Apr 21Apr 17Apr 14Apr 11Apr 6Apr 2
28°FApr 23Apr 17Apr 12Apr 7Apr 4Apr 2Mar 30Mar 25Mar 20
24°FApr 12Apr 5Apr 1Mar 29Mar 26Mar 22Mar 18Mar 14Mar 7
20°FApr 2Mar 28Mar 23Mar 19Mar 15Mar 11Mar 7Mar 2Feb 25
16°FMar 21Mar 15Mar 10Mar 6Mar 2Feb 28Feb 23Feb 17Feb 8

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 4Oct 9Oct 12Oct 15Oct 17Oct 20Oct 22Oct 25Oct 30
32°FOct 14Oct 19Oct 22Oct 25Oct 28Oct 31Nov 1Nov 5Nov 9
28°FOct 26Oct 31Nov 1Nov 4Nov 7Nov 10Nov 13Nov 17Nov 23
24°FNov 4Nov 9Nov 12Nov 16Nov 18Nov 22Nov 27Dec 1Dec 6
20°FNov 13Nov 19Nov 24Nov 29Dec 2Dec 6Dec 11Dec 18Dec 24
16°FNov 26Dec 1Dec 7Dec 11Dec 16Dec 20Dec 24Dec 30Jan 5

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°F191184179175171168163159152
32°F211205200196192188184179170
28°F239231225220216212207202194
24°F267257251245240234229224216
20°F292281274270264258252246237
16°F314304298293287279274268257

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
100% 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
5,003
Cooling degree days, base 65°F
1,129
Growing degree days, base 40°F
6,196
Growing degree days, base 45°F
4,904
Growing degree days, base 50°F
3,751
Growing degree days, base 55°F
2,738
Growing degree days, base 60°F
1,863

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,06008
February88209
March706253
April35216185
May12491437
June13239676
July1325789
August2289752
September52142541
October29325232
November613154
December907013

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 24 km from Laurelville. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00331592 (Circleville). Public domain.