Herington climate

Herington Frost Dates and Growing Season

NOAA 1991-2020 normals for Herington, 0.9 km from Herington, elevation 1338 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Herington. 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 24 and the first fall freeze around October 14, a growing season of about 173 days.

Median at 36°F
last May 3, first October 5
Median at 32°F
last April 24, first October 14
Median at 28°F
last April 13, first October 24

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 17May 12May 8May 5May 3Apr 30Apr 28Apr 24Apr 19
32°FMay 8May 4Apr 30Apr 27Apr 24Apr 21Apr 18Apr 14Apr 9
28°FMay 1Apr 25Apr 21Apr 17Apr 13Apr 10Apr 8Apr 3Mar 31
24°FApr 19Apr 12Apr 8Apr 5Apr 2Mar 31Mar 27Mar 22Mar 15
20°FApr 8Apr 3Mar 31Mar 26Mar 23Mar 18Mar 14Mar 9Mar 3
16°FMar 31Mar 25Mar 19Mar 15Mar 11Mar 7Mar 3Feb 28Feb 22

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°FSep 23Sep 27Sep 30Oct 3Oct 5Oct 8Oct 11Oct 14Oct 18
32°FSep 29Oct 4Oct 9Oct 12Oct 14Oct 17Oct 20Oct 23Oct 28
28°FOct 10Oct 15Oct 18Oct 21Oct 24Oct 27Oct 30Nov 1Nov 6
24°FOct 19Oct 25Oct 28Oct 31Nov 2Nov 4Nov 8Nov 12Nov 19
20°FOct 28Nov 1Nov 4Nov 8Nov 11Nov 14Nov 18Nov 23Dec 1
16°FNov 3Nov 9Nov 14Nov 18Nov 21Nov 26Nov 30Dec 3Dec 9

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°F174167162158154150146141135
32°F194187182177173169165159151
28°F213205201196192188183177170
24°F236227222217213208203197189
20°F256248242236232227222217209
16°F277269263257252248242235225

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
5,342
Cooling degree days, base 65°F
1,360
Growing degree days, base 40°F
6,297
Growing degree days, base 45°F
5,044
Growing degree days, base 50°F
3,928
Growing degree days, base 55°F
2,942
Growing degree days, base 60°F
2,088

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,13601
February90608
March676260
April37015177
May13690426
June11272711
July1424888
August3369831
September68163547
October32026231
November679146
December1,03503

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 0.9 km from Herington. 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 USC00143594 (Herington). Public domain.