Edgeworth climate

Edgeworth Frost Dates and Growing Season

NOAA 1991-2020 normals for Glenwillard Dashields L&d, 1.1 km from Edgeworth, elevation 710 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Glenwillard Dashields L&d. 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 November 8, a growing season of about 212 days.

Median at 36°F
last April 24, first October 28
Median at 32°F
last April 8, first November 8
Median at 28°F
last March 29, first November 18

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 13May 7May 2Apr 28Apr 24Apr 21Apr 17Apr 13Apr 7
32°FApr 26Apr 20Apr 16Apr 12Apr 8Apr 5Apr 2Mar 30Mar 25
28°FApr 12Apr 6Apr 3Mar 31Mar 29Mar 27Mar 23Mar 19Mar 14
24°FMar 31Mar 28Mar 25Mar 22Mar 19Mar 16Mar 13Mar 8Mar 2
20°FMar 25Mar 20Mar 16Mar 12Mar 9Mar 5Mar 1Feb 25Feb 16
16°FMar 17Mar 12Mar 8Mar 4Feb 28Feb 24Feb 19Feb 11Feb 2

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 13Oct 18Oct 22Oct 25Oct 28Oct 31Nov 2Nov 5Nov 10
32°FOct 27Nov 1Nov 2Nov 5Nov 8Nov 11Nov 14Nov 18Nov 24
28°FNov 5Nov 9Nov 12Nov 15Nov 18Nov 22Nov 25Nov 29Dec 4
24°FNov 12Nov 18Nov 22Nov 26Nov 30Dec 2Dec 6Dec 12Dec 19
20°FNov 21Nov 28Dec 2Dec 6Dec 10Dec 15Dec 20Dec 26Jan 2
16°FDec 1Dec 10Dec 15Dec 21Dec 26Dec 30Jan 3Jan 10Jan 17

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°F209201195190186181176171163
32°F233226222217212208204199190
28°F256248243239235229226221215
24°F281272266260254250244239232
20°F304295287283277272266260252
16°F327316308304298293287280272

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
5,644
Cooling degree days, base 65°F
840
Growing degree days, base 40°F
5,466
Growing degree days, base 45°F
4,270
Growing degree days, base 50°F
3,218
Growing degree days, base 55°F
2,294
Growing degree days, base 60°F
1,499

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,14201
February95602
March836125
April4382119
May16749360
June21162591
July1277741
August4241702
September7397475
October34812180
November687022
December97203

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 1.1 km from Edgeworth. 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 USC00363343 (Glenwillard Dashields L&d). Public domain.