Carnesville climate

Carnesville Frost Dates and Growing Season

NOAA 1991-2020 normals for Toccoa, 24.8 km from Carnesville, elevation 1012 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Toccoa. 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 23 and the first fall freeze around November 11, a growing season of about 233 days.

Median at 36°F
last April 5, first November 1
Median at 32°F
last March 23, first November 11
Median at 28°F
last March 11, first November 26

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 21Apr 16Apr 11Apr 8Apr 5Apr 2Mar 30Mar 25Mar 18
32°FApr 9Apr 2Mar 30Mar 27Mar 23Mar 19Mar 16Mar 10Mar 2
28°FMar 28Mar 22Mar 17Mar 14Mar 11Mar 6Mar 1Feb 23Feb 14
24°FMar 18Mar 11Mar 5Feb 28Feb 22Feb 15Feb 7Feb 1Jan 22
20°FMar 5Feb 26Feb 16Feb 7Jan 31Jan 28Jan 21Jan 14Jan 5
16°FFeb 25Feb 10Feb 1Jan 28Jan 24Jan 18Jan 12Jan 4Dec 27

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 19Oct 24Oct 27Oct 30Nov 1Nov 4Nov 6Nov 9Nov 14
32°FOct 29Nov 1Nov 5Nov 8Nov 11Nov 14Nov 18Nov 23Dec 1
28°FNov 7Nov 13Nov 16Nov 21Nov 26Dec 1Dec 4Dec 11Dec 23
24°FNov 20Nov 29Dec 3Dec 9Dec 16Dec 23Dec 30Jan 4Jan 13
20°FDec 7Dec 15Dec 23Dec 28Jan 2Jan 7Jan 11Jan 19Jan 30
16°FDec 14Dec 24Dec 31Jan 4Jan 9Jan 15Jan 19Jan 27Feb 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°F232224218214210206201196188
32°F259250244238233228224217210
28°F295284275268262255250243234
24°F333319310302295288282274260
20°F365355344336330320312303291
16°F365365365365358349340331316

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
88% of years
16°F or colder
59% 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
2,949
Cooling degree days, base 65°F
1,700
Growing degree days, base 40°F
8,030
Growing degree days, base 45°F
6,425
Growing degree days, base 50°F
4,986
Growing degree days, base 55°F
3,717
Growing degree days, base 60°F
2,623

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January685034
February533149
March3868161
April16642335
May41156580
June2331778
July0440905
August0409874
September9249690
October13458395
November3876135
December605050

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 24.8 km from Carnesville. 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 USC00098740 (Toccoa). Public domain.