Edgeley climate

Edgeley Frost Dates and Growing Season

NOAA 1991-2020 normals for Edgeley 3WNW, 4.1 km from Edgeley, elevation 1623 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Edgeley 3WNW. 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 May 7 and the first fall freeze around October 2, a growing season of about 148 days.

Median at 36°F
last May 16, first September 24
Median at 32°F
last May 7, first October 2
Median at 28°F
last April 28, first October 12

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 29May 24May 21May 18May 16May 14May 11May 8May 5
32°FMay 20May 16May 13May 9May 7May 4May 2Apr 29Apr 24
28°FMay 13May 8May 4May 1Apr 28Apr 25Apr 21Apr 17Apr 12
24°FMay 3Apr 28Apr 24Apr 20Apr 17Apr 14Apr 12Apr 8Apr 5
20°FApr 25Apr 19Apr 15Apr 12Apr 9Apr 7Apr 5Apr 2Mar 27
16°FApr 16Apr 12Apr 8Apr 5Apr 3Apr 1Mar 29Mar 23Mar 16

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 12Sep 16Sep 19Sep 22Sep 24Sep 26Sep 28Oct 1Oct 5
32°FSep 21Sep 25Sep 28Sep 30Oct 2Oct 5Oct 8Oct 11Oct 16
28°FSep 29Oct 2Oct 5Oct 8Oct 12Oct 15Oct 17Oct 21Oct 25
24°FOct 8Oct 13Oct 16Oct 19Oct 22Oct 25Oct 29Nov 1Nov 5
20°FOct 16Oct 21Oct 25Oct 28Oct 31Nov 2Nov 5Nov 8Nov 12
16°FOct 26Oct 31Nov 2Nov 5Nov 7Nov 10Nov 13Nov 16Nov 21

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°F147142138134131128124120114
32°F166159156152148145141137131
28°F187179174170166162158154147
24°F206200195190186182178173167
20°F224216210206203199196190182
16°F240233228223219215210205200

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
8,628
Cooling degree days, base 65°F
469
Growing degree days, base 40°F
4,121
Growing degree days, base 45°F
3,151
Growing degree days, base 50°F
2,295
Growing degree days, base 55°F
1,558
Growing degree days, base 60°F
944

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,64900
February1,36900
March1,14204
April679139
May31419222
June7989462
July20177621
August35142572
September20738301
October614369
November1,05104
December1,46900

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 4.1 km from Edgeley. 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 USC00322482 (Edgeley 3WNW). Public domain.