Neosho County climate

Neosho County Frost Dates and Growing Season

NOAA 1991-2020 normals for Chanute 4E, 14.1 km from Neosho County, elevation 992 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Chanute 4E. 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 8 and the first fall freeze around October 29, a growing season of about 203 days.

Median at 36°F
last April 20, first October 19
Median at 32°F
last April 8, first October 29
Median at 28°F
last March 29, first November 7

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 3Apr 29Apr 26Apr 23Apr 20Apr 16Apr 13Apr 9Apr 3
32°FApr 23Apr 18Apr 14Apr 11Apr 8Apr 5Apr 1Mar 29Mar 24
28°FApr 13Apr 8Apr 5Apr 1Mar 29Mar 26Mar 21Mar 16Mar 9
24°FApr 3Mar 29Mar 25Mar 20Mar 16Mar 12Mar 8Mar 4Feb 27
20°FMar 22Mar 16Mar 12Mar 9Mar 5Mar 2Feb 28Feb 23Feb 16
16°FMar 14Mar 9Mar 5Mar 1Feb 26Feb 22Feb 18Feb 11Feb 1

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 4Oct 10Oct 13Oct 16Oct 19Oct 22Oct 24Oct 28Nov 1
32°FOct 14Oct 19Oct 23Oct 26Oct 29Nov 1Nov 3Nov 6Nov 11
28°FOct 24Oct 30Nov 1Nov 4Nov 7Nov 11Nov 14Nov 19Nov 24
24°FNov 1Nov 6Nov 10Nov 13Nov 17Nov 21Nov 25Nov 29Dec 4
20°FNov 9Nov 15Nov 19Nov 24Nov 28Dec 1Dec 4Dec 9Dec 15
16°FNov 19Nov 26Nov 30Dec 4Dec 8Dec 12Dec 16Dec 22Dec 29

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°F202194189184180177172168161
32°F224217211206203198193188180
28°F247239233228223219214208201
24°F269260254249244239233228220
20°F289281276271266261256249241
16°F311303296291285279274268261

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
4,704
Cooling degree days, base 65°F
1,407
Growing degree days, base 40°F
6,668
Growing degree days, base 45°F
5,332
Growing degree days, base 50°F
4,138
Growing degree days, base 55°F
3,087
Growing degree days, base 60°F
2,178

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,03705
February809014
March603373
April31816206
May10593457
June7279723
July0423888
August1383846
September43178585
October26231269
November588264
December93109

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 14.1 km from Neosho County. 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 USC00141428 (Chanute 4E). Public domain.