Piggott climate

Piggott Frost Dates and Growing Season

NOAA 1991-2020 normals for Malden Muni AP, 30.1 km from Piggott, elevation 290 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Malden Muni AP. 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 March 29 and the first fall freeze around November 3, a growing season of about 221 days.

Median at 36°F
last April 8, first October 26
Median at 32°F
last March 29, first November 3
Median at 28°F
last March 17, first November 15

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°FApr 24Apr 19Apr 14Apr 10Apr 8Apr 5Apr 2Mar 30Mar 25
32°FApr 12Apr 7Apr 4Apr 1Mar 29Mar 25Mar 22Mar 18Mar 12
28°FApr 3Mar 28Mar 24Mar 20Mar 17Mar 13Mar 8Mar 4Feb 28
24°FMar 23Mar 17Mar 13Mar 8Mar 5Mar 2Feb 28Feb 22Feb 14
20°FMar 14Mar 7Mar 3Feb 28Feb 23Feb 19Feb 13Feb 7Jan 31
16°FMar 5Feb 28Feb 22Feb 15Feb 10Feb 5Jan 31Jan 26Jan 15

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 15Oct 18Oct 21Oct 24Oct 26Oct 28Oct 30Nov 2Nov 7
32°FOct 23Oct 27Oct 30Nov 1Nov 3Nov 6Nov 9Nov 15Nov 22
28°FNov 1Nov 4Nov 7Nov 11Nov 15Nov 18Nov 23Nov 29Dec 3
24°FNov 8Nov 15Nov 19Nov 24Nov 29Dec 2Dec 5Dec 11Dec 18
20°FNov 17Nov 25Dec 1Dec 5Dec 10Dec 16Dec 21Dec 27Jan 4
16°FDec 1Dec 9Dec 16Dec 22Dec 27Jan 1Jan 6Jan 13Jan 24

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°F219212206202198194191187180
32°F244235229224221217213207201
28°F269260253248243238233226219
24°F293284278272266260255250240
20°F321310302297291285279271261
16°F351336329322316309303295286

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
97% 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
3,761
Cooling degree days, base 65°F
1,942
Growing degree days, base 40°F
7,781
Growing degree days, base 45°F
6,330
Growing degree days, base 50°F
5,023
Growing degree days, base 55°F
3,860
Growing degree days, base 60°F
2,834

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January888014
February688126
March4906116
April19943315
May40186611
June1412861
July0516981
August0462927
September18251684
October17159365
November4825104
December784019

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 30.1 km from Piggott. 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 USC00235207 (Malden Muni AP). Public domain.