Yellville climate

Yellville Frost Dates and Growing Season

NOAA 1991-2020 normals for Gilbert, 26.5 km from Yellville, elevation 606 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Gilbert. 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 14 and the first fall freeze around October 22, a growing season of about 189 days.

Median at 36°F
last April 26, first October 12
Median at 32°F
last April 14, first October 22
Median at 28°F
last April 3, first October 31

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 4Apr 30Apr 29Apr 26Apr 23Apr 19Apr 16Apr 10
32°FApr 30Apr 25Apr 21Apr 18Apr 14Apr 11Apr 8Apr 4Mar 30
28°FApr 20Apr 14Apr 10Apr 6Apr 3Mar 31Mar 27Mar 24Mar 16
24°FApr 9Apr 4Mar 31Mar 26Mar 22Mar 18Mar 14Mar 10Mar 3
20°FMar 31Mar 22Mar 18Mar 14Mar 10Mar 6Mar 2Feb 27Feb 21
16°FMar 18Mar 10Mar 5Mar 2Feb 26Feb 23Feb 18Feb 12Feb 3

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 29Oct 3Oct 6Oct 9Oct 12Oct 15Oct 18Oct 21Oct 27
32°FOct 7Oct 12Oct 16Oct 19Oct 22Oct 25Oct 28Oct 31Nov 4
28°FOct 16Oct 22Oct 25Oct 28Oct 31Nov 2Nov 4Nov 8Nov 14
24°FOct 25Oct 30Nov 2Nov 5Nov 7Nov 11Nov 15Nov 20Nov 26
20°FNov 1Nov 6Nov 11Nov 15Nov 19Nov 23Nov 28Dec 2Dec 8
16°FNov 11Nov 18Nov 23Nov 27Dec 1Dec 4Dec 8Dec 14Dec 24

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°F188181176172169165161156150
32°F209202197193189185181175169
28°F231223218213209206201196189
24°F254246239234229225220214208
20°F279269263257252247241235226
16°F306297290283277271264257248

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
4,028
Cooling degree days, base 65°F
1,450
Growing degree days, base 40°F
7,061
Growing degree days, base 45°F
5,641
Growing degree days, base 50°F
4,370
Growing degree days, base 55°F
3,249
Growing degree days, base 60°F
2,275

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January890015
February696128
March5156104
April24829261
May76110501
June4282729
July0414879
August1387851
September31181600
October22637300
November535483
December807121

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 26.5 km from Yellville. 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 USC00032794 (Gilbert). Public domain.