Proctorville climate

Proctorville Frost Dates and Growing Season

NOAA 1991-2020 normals for Pea Ridge Psd, 7.1 km from Proctorville, elevation 584 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Pea Ridge Psd. 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 8 and the first fall freeze around November 1, a growing season of about 205 days.

Median at 36°F
last April 22, first October 21
Median at 32°F
last April 8, first November 1
Median at 28°F
last March 28, first November 11

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 11May 3Apr 30Apr 25Apr 22Apr 19Apr 16Apr 13Apr 8
32°FApr 25Apr 18Apr 15Apr 12Apr 8Apr 5Apr 2Mar 31Mar 26
28°FApr 11Apr 4Apr 2Mar 30Mar 28Mar 25Mar 21Mar 17Mar 10
24°FMar 30Mar 26Mar 22Mar 18Mar 15Mar 11Mar 7Mar 2Feb 23
20°FMar 21Mar 13Mar 9Mar 5Mar 1Feb 26Feb 20Feb 14Feb 6
16°FMar 13Mar 5Feb 28Feb 24Feb 16Feb 10Feb 4Jan 31Jan 21

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 9Oct 14Oct 16Oct 19Oct 21Oct 24Oct 26Oct 28Nov 1
32°FOct 19Oct 24Oct 27Oct 30Nov 1Nov 2Nov 5Nov 8Nov 13
28°FNov 1Nov 3Nov 6Nov 9Nov 11Nov 14Nov 18Nov 23Nov 29
24°FNov 7Nov 12Nov 17Nov 21Nov 25Nov 28Dec 2Dec 6Dec 15
20°FNov 17Nov 24Nov 30Dec 4Dec 8Dec 14Dec 21Dec 27Jan 5
16°FDec 1Dec 8Dec 14Dec 21Dec 27Jan 1Jan 6Jan 13Jan 21

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°F201194189185181177172167159
32°F225217213209205201196191183
28°F253244238233229225221215210
24°F281270263258253249245239230
20°F312301294287281275269261251
16°F336329322316307301296288277

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
4,166
Cooling degree days, base 65°F
1,404
Growing degree days, base 40°F
6,933
Growing degree days, base 45°F
5,525
Growing degree days, base 50°F
4,267
Growing degree days, base 55°F
3,164
Growing degree days, base 60°F
2,213

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January913017
February734125
March573584
April25230265
May88125504
June5278723
July0397862
August1356820
September33180597
October24233280
November538169
December789024

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 7.1 km from Proctorville. 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 USC00466912 (Pea Ridge Psd). Public domain.