Goodman climate

Goodman Frost Dates and Growing Season

NOAA 1991-2020 normals for Lexington, 21.4 km from Goodman, elevation 285 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lexington. 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 31 and the first fall freeze around November 1, a growing season of about 218 days.

Median at 36°F
last April 11, first October 23
Median at 32°F
last March 31, first November 1
Median at 28°F
last March 16, 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 26Apr 21Apr 17Apr 14Apr 11Apr 7Apr 4Mar 31Mar 25
32°FApr 17Apr 11Apr 6Apr 3Mar 31Mar 27Mar 22Mar 17Mar 10
28°FApr 4Mar 30Mar 24Mar 20Mar 16Mar 11Mar 7Mar 2Feb 25
24°FMar 20Mar 14Mar 9Mar 5Mar 1Feb 27Feb 23Feb 17Feb 6
20°FMar 11Mar 4Feb 27Feb 22Feb 16Feb 10Feb 3Jan 29Jan 17
16°FMar 4Feb 24Feb 15Feb 8Feb 2Jan 29Jan 23Jan 14Dec 31

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 9Oct 14Oct 17Oct 21Oct 23Oct 25Oct 28Nov 1Nov 5
32°FOct 19Oct 23Oct 27Oct 30Nov 1Nov 5Nov 8Nov 13Nov 20
28°FOct 29Nov 2Nov 5Nov 9Nov 12Nov 15Nov 20Nov 25Dec 1
24°FNov 5Nov 11Nov 16Nov 20Nov 26Nov 30Dec 2Dec 7Dec 19
20°FNov 15Nov 24Dec 1Dec 4Dec 10Dec 17Dec 26Jan 1Jan 9
16°FNov 29Dec 8Dec 17Dec 25Dec 30Jan 3Jan 7Jan 15Jan 31

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°F217209203198194190186181174
32°F241233227223218212206200192
28°F267257251246240236231225215
24°F297286279273267262256250240
20°F334320311303297289281274263
16°F365352341334327319309303290

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
99% of years
16°F or colder
89% 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
2,966
Cooling degree days, base 65°F
1,786
Growing degree days, base 40°F
8,172
Growing degree days, base 45°F
6,599
Growing degree days, base 50°F
5,163
Growing degree days, base 55°F
3,875
Growing degree days, base 60°F
2,747

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January692147
February543267
March35713187
April15948350
May28178615
June1331780
July0443908
August0422887
September9266706
October13873409
November4048145
December636262

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 21.4 km from Goodman. 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 USC00225062 (Lexington). Public domain.