Dyer climate

Dyer Frost Dates and Growing Season

NOAA 1991-2020 normals for Mountainburg 2 Ne, 17.6 km from Dyer, elevation 793 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Mountainburg 2 Ne. 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 9 and the first fall freeze around October 28, a growing season of about 201 days.

Median at 36°F
last April 23, first October 18
Median at 32°F
last April 9, first October 28
Median at 28°F
last March 28, first November 6

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 3Apr 30Apr 26Apr 23Apr 19Apr 15Apr 12Apr 7
32°FApr 28Apr 21Apr 16Apr 13Apr 9Apr 6Apr 3Mar 30Mar 24
28°FApr 14Apr 7Apr 3Mar 31Mar 28Mar 24Mar 20Mar 14Mar 8
24°FApr 4Mar 29Mar 24Mar 19Mar 15Mar 11Mar 6Mar 1Feb 24
20°FMar 23Mar 16Mar 11Mar 6Mar 2Feb 27Feb 22Feb 15Feb 5
16°FMar 10Mar 4Feb 28Feb 23Feb 16Feb 10Feb 3Jan 30Jan 19

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 5Oct 9Oct 13Oct 16Oct 18Oct 21Oct 24Oct 27Nov 2
32°FOct 14Oct 19Oct 22Oct 25Oct 28Oct 31Nov 2Nov 6Nov 12
28°FOct 23Oct 29Nov 1Nov 3Nov 6Nov 10Nov 14Nov 19Nov 25
24°FNov 1Nov 5Nov 10Nov 13Nov 18Nov 21Nov 27Dec 1Dec 6
20°FNov 10Nov 17Nov 22Nov 27Dec 1Dec 5Dec 9Dec 15Dec 23
16°FNov 21Dec 1Dec 6Dec 12Dec 19Dec 25Dec 31Jan 6Jan 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°F201194188183179174170164156
32°F225217210206201197192186177
28°F250239232227222218214208202
24°F273265258253247241235227220
20°F303292284277272266261254245
16°F336326316308302295289280270

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
3,733
Cooling degree days, base 65°F
1,586
Growing degree days, base 40°F
7,368
Growing degree days, base 45°F
5,901
Growing degree days, base 50°F
4,592
Growing degree days, base 55°F
3,438
Growing degree days, base 60°F
2,433

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January851013
February650129
March4754109
April21725277
May62120523
June2312760
July0450914
August0417882
September21210639
October19044335
November495391
December769121

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 17.6 km from Dyer. 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 USC00035018 (Mountainburg 2 Ne). Public domain.