Aragon climate

Aragon Frost Dates and Growing Season

NOAA 1991-2020 normals for Cedartown, 16.5 km from Aragon, elevation 785 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Cedartown. 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 30 and the first fall freeze around November 4, a growing season of about 219 days.

Median at 36°F
last April 11, first October 26
Median at 32°F
last March 30, first November 4
Median at 28°F
last March 16, 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 29Apr 22Apr 18Apr 14Apr 11Apr 8Apr 4Mar 31Mar 25
32°FApr 14Apr 9Apr 5Apr 2Mar 30Mar 26Mar 21Mar 17Mar 8
28°FApr 2Mar 28Mar 23Mar 19Mar 16Mar 10Mar 4Feb 27Feb 19
24°FMar 22Mar 15Mar 10Mar 3Feb 28Feb 22Feb 16Feb 7Jan 31
20°FMar 8Feb 28Feb 21Feb 13Feb 7Feb 1Jan 29Jan 22Jan 11
16°FFeb 24Feb 12Feb 5Jan 31Jan 28Jan 22Jan 17Jan 11Jan 1

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 12Oct 17Oct 21Oct 23Oct 26Oct 29Nov 1Nov 3Nov 7
32°FOct 20Oct 26Oct 30Nov 1Nov 4Nov 6Nov 9Nov 14Nov 20
28°FOct 31Nov 3Nov 7Nov 11Nov 15Nov 19Nov 23Nov 29Dec 5
24°FNov 8Nov 15Nov 21Nov 25Nov 30Dec 3Dec 10Dec 20Dec 31
20°FNov 22Nov 30Dec 5Dec 13Dec 23Dec 29Jan 2Jan 9Jan 19
16°FDec 8Dec 18Dec 29Jan 2Jan 6Jan 11Jan 16Jan 21Feb 1

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°F220213208203199195190185176
32°F247238230224219214209205198
28°F274263256250244240234227219
24°F311298289282275267260253243
20°F348334327320311304296288274
16°F365365356348339332324316302

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
96% of years
16°F or colder
77% 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
2,921
Cooling degree days, base 65°F
1,926
Growing degree days, base 40°F
8,313
Growing degree days, base 45°F
6,720
Growing degree days, base 50°F
5,279
Growing degree days, base 55°F
3,997
Growing degree days, base 60°F
2,880

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January689142
February524262
March36011181
April14457372
May35181611
June1373822
July0482947
August0463928
September10278718
October13869406
November4107129
December612260

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 16.5 km from Aragon. 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 USC00091732 (Cedartown). Public domain.