Doerun climate

Doerun Frost Dates and Growing Season

NOAA 1991-2020 normals for Moultrie 2 Ese, 22.5 km from Doerun, elevation 340 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Moultrie 2 Ese. 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 6 and the first fall freeze around November 27, a growing season of about 268 days.

Median at 36°F
last March 19, first November 12
Median at 32°F
last March 6, first November 27
Median at 28°F
last February 18, first December 16

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 9Apr 2Mar 29Mar 24Mar 19Mar 15Mar 11Mar 6Feb 27
32°FMar 27Mar 21Mar 15Mar 10Mar 6Mar 2Feb 25Feb 17Feb 5
28°FMar 17Mar 8Mar 1Feb 24Feb 18Feb 8Feb 1Jan 26Jan 15
24°FMar 2Feb 20Feb 11Feb 4Jan 31Jan 25Jan 19Jan 11Jan 2
20°FFeb 16Feb 7Feb 2Jan 28Jan 22Jan 16Jan 11Jan 6Dec 31
16°FFeb 8Feb 4Jan 29Jan 23Jan 20Jan 14Jan 11Jan 7Jan 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 27Nov 2Nov 5Nov 9Nov 12Nov 15Nov 20Nov 26Dec 4
32°FNov 6Nov 13Nov 17Nov 21Nov 27Dec 1Dec 5Dec 11Dec 27
28°FNov 19Nov 27Dec 3Dec 8Dec 16Dec 23Dec 31Jan 6Jan 15
24°FDec 8Dec 18Dec 27Jan 1Jan 6Jan 11Jan 17Jan 25Feb 4
20°FDec 19Jan 1Jan 6Jan 10Jan 14Jan 20Jan 27Feb 1Feb 8
16°FJan 1Jan 5Jan 10Jan 13Jan 18Jan 22Jan 26Feb 2Feb 8

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°F268257251245240235229222214
32°F305293283275268262255248238
28°F340331321314306300291281270
24°F365364353344337331323313302
20°F365365365365365359349337325
16°F365365365365365365365365350

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
98% of years
24°F or colder
80% of years
20°F or colder
44% of years
16°F or colder
13% 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
1,779
Cooling degree days, base 65°F
2,286
Growing degree days, base 40°F
9,671
Growing degree days, base 45°F
7,922
Growing degree days, base 50°F
6,272
Growing degree days, base 55°F
4,768
Growing degree days, base 60°F
3,433

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January4704114
February3268157
March20730306
April7289468
May8261718
June0417867
July0490955
August0476941
September1340789
October56137547
November23827259
December4008152

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 22.5 km from Doerun. 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 USC00096087 (Moultrie 2 Ese). Public domain.