Geronimo climate

Geronimo Frost Dates and Growing Season

NOAA 1991-2020 normals for Lawton Muni AP, 9.1 km from Geronimo, elevation 1069 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lawton Muni AP. 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 1 and the first fall freeze around November 5, a growing season of about 217 days.

Median at 36°F
last April 13, first October 27
Median at 32°F
last April 1, first November 5
Median at 28°F
last March 18, first November 14

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 24Apr 20Apr 16Apr 13Apr 9Apr 6Apr 2Mar 28
32°FApr 19Apr 12Apr 7Apr 4Apr 1Mar 29Mar 24Mar 19Mar 12
28°FApr 5Mar 31Mar 27Mar 22Mar 18Mar 14Mar 10Mar 4Feb 28
24°FMar 26Mar 18Mar 13Mar 9Mar 5Mar 2Feb 26Feb 22Feb 12
20°FMar 13Mar 6Mar 1Feb 26Feb 22Feb 16Feb 10Feb 2Jan 27
16°FMar 3Feb 25Feb 17Feb 9Feb 3Jan 29Jan 23Jan 15Jan 2

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 13Oct 18Oct 22Oct 24Oct 27Oct 30Nov 1Nov 4Nov 9
32°FOct 22Oct 28Oct 31Nov 2Nov 5Nov 7Nov 11Nov 14Nov 18
28°FOct 30Nov 4Nov 8Nov 11Nov 14Nov 17Nov 20Nov 24Nov 29
24°FNov 5Nov 12Nov 16Nov 20Nov 23Nov 27Nov 30Dec 4Dec 9
20°FNov 15Nov 23Nov 27Dec 1Dec 5Dec 10Dec 14Dec 19Dec 25
16°FNov 27Dec 3Dec 10Dec 16Dec 20Dec 25Jan 1Jan 7Jan 19

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°F215209205201196192188183175
32°F241232226221217213208203196
28°F264254249244240234228222214
24°F289280273268263258253245233
20°F320309302294288282275269257
16°F356343334326319311305295286

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
95% 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
3,163
Cooling degree days, base 65°F
2,321
Growing degree days, base 40°F
8,548
Growing degree days, base 45°F
7,002
Growing degree days, base 50°F
5,606
Growing degree days, base 55°F
4,366
Growing degree days, base 60°F
3,270

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January758018
February563251
March36816184
April15756361
May28216653
June0451901
July06001,065
August05751,040
September11314753
October13585425
November4226131
December722025

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 9.1 km from Geronimo. 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 USW00003950 (Lawton Muni AP). Public domain.