Hall County climate

Hall County Frost Dates and Growing Season

NOAA 1991-2020 normals for Turkey, 24.9 km from Hall County, elevation 2330 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Turkey. 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 4 and the first fall freeze around November 3, a growing season of about 211 days.

Median at 36°F
last April 16, first October 25
Median at 32°F
last April 4, first November 3
Median at 28°F
last March 21, first November 12

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 30Apr 25Apr 22Apr 19Apr 16Apr 12Apr 8Apr 5Mar 31
32°FApr 21Apr 16Apr 10Apr 7Apr 4Apr 1Mar 29Mar 22Mar 15
28°FApr 8Apr 3Mar 31Mar 25Mar 21Mar 17Mar 12Mar 7Mar 2
24°FMar 30Mar 21Mar 15Mar 11Mar 8Mar 4Feb 28Feb 25Feb 19
20°FMar 14Mar 8Mar 4Feb 28Feb 24Feb 20Feb 16Feb 11Jan 30
16°FMar 5Feb 28Feb 20Feb 14Feb 10Feb 3Jan 27Jan 17Jan 3

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 20Oct 22Oct 25Oct 27Oct 31Nov 2Nov 6
32°FOct 19Oct 25Oct 29Nov 1Nov 3Nov 5Nov 7Nov 11Nov 16
28°FOct 29Nov 3Nov 6Nov 9Nov 12Nov 15Nov 19Nov 23Nov 29
24°FNov 6Nov 11Nov 16Nov 19Nov 23Nov 26Nov 30Dec 3Dec 9
20°FNov 14Nov 22Nov 26Nov 30Dec 3Dec 8Dec 12Dec 18Dec 27
16°FNov 25Dec 1Dec 8Dec 14Dec 19Dec 25Jan 1Jan 9Jan 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°F211204199195191187183178171
32°F235226221216211206202196189
28°F260251244238234229223216208
24°F286277270264259253248240231
20°F317305297291285279273264255
16°F353335328321314306299291280

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
96% 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
3,205
Cooling degree days, base 65°F
2,109
Growing degree days, base 40°F
8,333
Growing degree days, base 45°F
6,785
Growing degree days, base 50°F
5,379
Growing degree days, base 55°F
4,126
Growing degree days, base 60°F
3,040

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January733027
February569258
March39116181
April17463358
May46204624
June1409858
July05431,007
August0509973
September19278710
October15377406
November4187141
December699037

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 24.9 km from Hall County. 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 USC00419191 (Turkey). Public domain.