Eustace climate

Eustace Frost Dates and Growing Season

NOAA 1991-2020 normals for Athens, 23.1 km from Eustace, elevation 448 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Athens. 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 18 and the first fall freeze around November 12, a growing season of about 242 days.

Median at 36°F
last March 31, first November 3
Median at 32°F
last March 18, first November 12
Median at 28°F
last March 5, first November 24

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 18Apr 13Apr 7Apr 4Mar 31Mar 28Mar 24Mar 18Mar 12
32°FApr 6Mar 31Mar 26Mar 23Mar 18Mar 14Mar 10Mar 5Feb 27
28°FMar 26Mar 19Mar 14Mar 9Mar 5Mar 1Feb 25Feb 19Feb 8
24°FMar 15Mar 6Mar 1Feb 25Feb 17Feb 11Feb 4Jan 28Jan 20
20°FMar 4Feb 23Feb 10Feb 3Jan 29Jan 22Jan 16Jan 7Dec 27
16°FFeb 24Feb 6Jan 31Jan 23Jan 18Jan 9Jan 3Dec 29Dec 19

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

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°F243235228223219214209204196
32°F267258252246242236231224216
28°F294284277270264259254247240
24°F333321310302296288280271260
20°F365357348340332324315304291
16°F365365365365365359349337322

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
99% of years
20°F or colder
87% of years
16°F or colder
49% 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
2,301
Cooling degree days, base 65°F
2,529
Growing degree days, base 40°F
9,461
Growing degree days, base 45°F
7,797
Growing degree days, base 50°F
6,257
Growing degree days, base 55°F
4,861
Growing degree days, base 60°F
3,613

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January586470
February4207116
March27126261
April9486447
May15260710
June0456906
July05691,034
August05801,044
September3376823
October78136527
November29723228
December536691

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 23.1 km from Eustace. 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 USC00410404 (Athens). Public domain.