Coffeyville climate

Coffeyville Frost Dates and Growing Season

NOAA 1991-2020 normals for Coffeyville Wtr Wks, 3.2 km from Coffeyville, elevation 737 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Coffeyville Wtr Wks. 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 6 and the first fall freeze around November 1, a growing season of about 208 days.

Median at 36°F
last April 16, first October 22
Median at 32°F
last April 6, first November 1
Median at 28°F
last March 26, first November 9

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 27Apr 24Apr 20Apr 16Apr 13Apr 10Apr 6Apr 1
32°FApr 21Apr 17Apr 12Apr 9Apr 6Apr 3Mar 31Mar 27Mar 20
28°FApr 10Apr 5Apr 2Mar 30Mar 26Mar 23Mar 18Mar 13Mar 6
24°FApr 1Mar 26Mar 21Mar 17Mar 13Mar 9Mar 5Mar 1Feb 25
20°FMar 18Mar 13Mar 8Mar 5Mar 2Feb 28Feb 25Feb 20Feb 14
16°FMar 12Mar 5Mar 2Feb 27Feb 23Feb 19Feb 14Feb 8Jan 30

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 6Oct 14Oct 17Oct 19Oct 22Oct 25Oct 28Oct 31Nov 3
32°FOct 17Oct 22Oct 26Oct 30Nov 1Nov 3Nov 5Nov 9Nov 14
28°FOct 27Nov 1Nov 3Nov 6Nov 9Nov 13Nov 17Nov 21Nov 28
24°FNov 2Nov 7Nov 11Nov 15Nov 18Nov 23Nov 28Dec 1Dec 6
20°FNov 10Nov 17Nov 22Nov 26Nov 30Dec 2Dec 7Dec 11Dec 18
16°FNov 22Nov 28Dec 2Dec 7Dec 11Dec 15Dec 20Dec 26Jan 3

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°F207201196191187184179174167
32°F230223217212208204199193186
28°F252244237232227223218213206
24°F274266259254249244238232225
20°F297288282276271265259255245
16°F321311304298292287281274263

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
4,190
Cooling degree days, base 65°F
1,662
Growing degree days, base 40°F
7,232
Growing degree days, base 45°F
5,826
Growing degree days, base 50°F
4,572
Growing degree days, base 55°F
3,464
Growing degree days, base 60°F
2,492

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January95807
February731024
March541595
April26326254
May72122517
June2322769
July0476941
August0450914
September27213636
October21446321
November533380
December849014

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 3.2 km from Coffeyville. 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 USC00141673 (Coffeyville Wtr Wks). Public domain.