Stinnett climate

Stinnett Frost Dates and Growing Season

NOAA 1991-2020 normals for Borger, 18 km from Stinnett, elevation 3053 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Borger. 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 12 and the first fall freeze around October 28, a growing season of about 198 days.

Median at 36°F
last April 23, first October 20
Median at 32°F
last April 12, first October 28
Median at 28°F
last April 1, first November 6

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 5May 2Apr 29Apr 26Apr 23Apr 20Apr 16Apr 12Apr 6
32°FApr 27Apr 23Apr 19Apr 16Apr 12Apr 8Apr 5Apr 1Mar 26
28°FApr 19Apr 11Apr 7Apr 4Apr 1Mar 29Mar 24Mar 19Mar 11
24°FApr 7Apr 1Mar 28Mar 23Mar 18Mar 13Mar 9Mar 4Feb 27
20°FMar 27Mar 19Mar 13Mar 9Mar 5Mar 2Feb 26Feb 21Feb 15
16°FMar 13Mar 6Mar 2Feb 27Feb 23Feb 18Feb 13Feb 6Jan 27

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 5Oct 10Oct 14Oct 17Oct 20Oct 22Oct 24Oct 28Nov 1
32°FOct 15Oct 20Oct 23Oct 26Oct 28Oct 31Nov 2Nov 5Nov 9
28°FOct 23Oct 30Nov 1Nov 3Nov 6Nov 9Nov 12Nov 14Nov 20
24°FNov 1Nov 5Nov 8Nov 12Nov 14Nov 17Nov 21Nov 25Dec 1
20°FNov 7Nov 13Nov 18Nov 21Nov 25Nov 29Dec 3Dec 7Dec 14
16°FNov 16Nov 23Nov 29Dec 2Dec 6Dec 11Dec 17Dec 23Jan 1

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°F198192187183179175171167160
32°F219213207203198194190185179
28°F242233227222218214210205196
24°F266257251245240235229224215
20°F291282275270264259253246234
16°F322311304296289284277270260

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
3,445
Cooling degree days, base 65°F
1,910
Growing degree days, base 40°F
7,959
Growing degree days, base 45°F
6,447
Growing degree days, base 50°F
5,081
Growing degree days, base 55°F
3,868
Growing degree days, base 60°F
2,812

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January770022
February594145
March40711168
April19445324
May50177593
June2386834
July0509973
August1456921
September18258690
October16861375
November4765114
December764024

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 18 km from Stinnett. 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 USC00410958 (Borger). Public domain.