Drumright climate

Drumright Frost Dates and Growing Season

NOAA 1991-2020 normals for Cushing, 15.8 km from Drumright, elevation 950 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Cushing. 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 11, first October 26
Median at 32°F
last April 1, first November 5
Median at 28°F
last March 20, 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 19Apr 15Apr 11Apr 8Apr 5Apr 2Mar 28
32°FApr 17Apr 10Apr 7Apr 4Apr 1Mar 29Mar 25Mar 20Mar 13
28°FApr 6Apr 1Mar 28Mar 24Mar 20Mar 16Mar 12Mar 6Mar 2
24°FMar 27Mar 20Mar 15Mar 10Mar 7Mar 4Mar 1Feb 25Feb 18
20°FMar 16Mar 10Mar 6Mar 2Feb 28Feb 23Feb 19Feb 13Feb 2
16°FMar 10Mar 4Feb 26Feb 21Feb 16Feb 10Feb 5Jan 29Jan 17

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 11Oct 17Oct 21Oct 23Oct 26Oct 29Nov 1Nov 4Nov 9
32°FOct 20Oct 26Oct 31Nov 2Nov 5Nov 7Nov 11Nov 14Nov 19
28°FOct 30Nov 3Nov 7Nov 11Nov 14Nov 17Nov 21Nov 25Nov 30
24°FNov 5Nov 12Nov 17Nov 21Nov 24Nov 27Dec 1Dec 4Dec 10
20°FNov 17Nov 24Nov 28Dec 1Dec 4Dec 8Dec 13Dec 19Dec 28
16°FNov 28Dec 2Dec 8Dec 14Dec 18Dec 24Dec 30Jan 5Jan 15

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°F216210205201196192187181174
32°F240232227222217213208203195
28°F262254247243238233228221213
24°F286277271266261255250243233
20°F311302295290283277272265256
16°F340328320313306301295287276

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
99% 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
3,611
Cooling degree days, base 65°F
1,974
Growing degree days, base 40°F
7,925
Growing degree days, base 45°F
6,439
Growing degree days, base 50°F
5,103
Growing degree days, base 55°F
3,915
Growing degree days, base 60°F
2,873

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January842014
February644139
March45710143
April20346315
May50156571
June3376823
July0532997
August0512976
September20273704
October16462377
November4587121
December769022

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 15.8 km from Drumright. 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 USC00342318 (Cushing). Public domain.