Labette County climate

Labette County Frost Dates and Growing Season

NOAA 1991-2020 normals for Mound Valley 3 Wsw, 13.5 km from Labette County, elevation 800 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Mound Valley 3 Wsw. 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 15 and the first fall freeze around October 24, a growing season of about 192 days.

Median at 36°F
last April 26, first October 16
Median at 32°F
last April 15, first October 24
Median at 28°F
last April 4, 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 8May 3May 1Apr 29Apr 26Apr 23Apr 19Apr 16Apr 11
32°FApr 30Apr 26Apr 22Apr 18Apr 15Apr 11Apr 8Apr 4Mar 30
28°FApr 21Apr 14Apr 10Apr 7Apr 4Apr 1Mar 29Mar 23Mar 17
24°FApr 8Apr 3Mar 31Mar 26Mar 22Mar 18Mar 14Mar 8Mar 2
20°FMar 29Mar 20Mar 16Mar 12Mar 8Mar 4Mar 1Feb 26Feb 20
16°FMar 16Mar 10Mar 6Mar 3Feb 28Feb 25Feb 21Feb 15Feb 7

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 1Oct 6Oct 9Oct 13Oct 16Oct 18Oct 20Oct 23Oct 27
32°FOct 9Oct 15Oct 18Oct 21Oct 24Oct 26Oct 29Nov 1Nov 4
28°FOct 18Oct 24Oct 27Oct 30Nov 1Nov 4Nov 7Nov 12Nov 16
24°FOct 27Nov 1Nov 4Nov 7Nov 10Nov 14Nov 18Nov 23Nov 28
20°FNov 2Nov 7Nov 13Nov 17Nov 21Nov 26Nov 30Dec 3Dec 9
16°FNov 11Nov 19Nov 25Nov 29Dec 2Dec 5Dec 9Dec 15Dec 23

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°F191185179175172167163158152
32°F213206201196192188183178171
28°F233225220215212208204200192
24°F259251245241235230224219211
20°F281273267261255250245238230
16°F306296288282277273267259249

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
4,690
Cooling degree days, base 65°F
1,440
Growing degree days, base 40°F
6,693
Growing degree days, base 45°F
5,362
Growing degree days, base 50°F
4,177
Growing degree days, base 55°F
3,126
Growing degree days, base 60°F
2,211

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,02705
February804015
March597376
April31318210
May10097465
June6285729
July0431896
August1396860
September47177582
October26730265
November599265
December928010

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 13.5 km from Labette County. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00145536 (Mound Valley 3 Wsw). Public domain.