Lordsburg climate

Lordsburg Frost Dates and Growing Season

NOAA 1991-2020 normals for Lordsburg 4 Se, 6.9 km from Lordsburg, elevation 4244 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lordsburg 4 Se. 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 27 and the first fall freeze around October 25, a growing season of about 179 days.

Median at 36°F
last May 4, first October 16
Median at 32°F
last April 27, first October 25
Median at 28°F
last April 15, first November 1

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°FMay 21May 15May 11May 7May 4May 2Apr 30Apr 28Apr 24
32°FMay 10May 5May 2Apr 29Apr 27Apr 24Apr 20Apr 17Apr 13
28°FMay 2Apr 27Apr 22Apr 18Apr 15Apr 11Apr 8Apr 3Mar 28
24°FApr 22Apr 14Apr 9Apr 4Mar 30Mar 24Mar 18Mar 11Mar 3
20°FApr 5Mar 24Mar 14Mar 8Mar 4Feb 28Feb 23Feb 17Feb 10
16°FMar 6Feb 27Feb 20Feb 15Feb 11Feb 5Jan 31Jan 25Jan 12

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 4Oct 9Oct 12Oct 14Oct 16Oct 18Oct 21Oct 24Oct 27
32°FOct 13Oct 17Oct 20Oct 23Oct 25Oct 27Oct 30Nov 1Nov 4
28°FOct 21Oct 25Oct 29Oct 31Nov 1Nov 4Nov 6Nov 8Nov 13
24°FOct 27Nov 1Nov 4Nov 7Nov 9Nov 12Nov 15Nov 19Nov 24
20°FNov 4Nov 8Nov 12Nov 16Nov 19Nov 24Nov 27Dec 1Dec 5
16°FNov 16Nov 20Nov 25Nov 29Dec 3Dec 7Dec 12Dec 17Dec 26

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°F178173169165162158154148141
32°F198191187183179176172168159
28°F220213207202198194190185178
24°F255243237231226220214206197
20°F290278272266260254248240230
16°F333319312304297291284276266

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
100% 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
3,125
Cooling degree days, base 65°F
1,811
Growing degree days, base 40°F
7,919
Growing degree days, base 45°F
6,317
Growing degree days, base 50°F
4,921
Growing degree days, base 55°F
3,723
Growing degree days, base 60°F
2,689

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January70206
February522023
March3871120
April18218291
May33151583
June1399849
July0507972
August0440905
September5252698
October12342388
November452183
December71906

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 6.9 km from Lordsburg. 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 USC00295079 (Lordsburg 4 Se). Public domain.