Edgewood climate

Edgewood Frost Dates and Growing Season

NOAA 1991-2020 normals for Ashtabula CO AP, 12.3 km from Edgewood, elevation 924 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Ashtabula CO AP. 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 2 and the first fall freeze around October 21, a growing season of about 171 days.

Median at 36°F
last May 14, first October 7
Median at 32°F
last May 2, first October 21
Median at 28°F
last April 21, first November 3

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 30May 25May 21May 17May 14May 10May 7May 2Apr 28
32°FMay 20May 15May 9May 6May 2Apr 30Apr 26Apr 23Apr 18
28°FMay 6Apr 30Apr 27Apr 24Apr 21Apr 18Apr 15Apr 10Apr 5
24°FApr 22Apr 18Apr 14Apr 10Apr 6Apr 3Apr 1Mar 29Mar 23
20°FApr 11Apr 4Apr 1Mar 29Mar 26Mar 23Mar 21Mar 17Mar 11
16°FMar 30Mar 27Mar 23Mar 20Mar 17Mar 15Mar 12Mar 8Mar 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 25Sep 29Oct 1Oct 4Oct 7Oct 10Oct 13Oct 19Oct 24
32°FOct 4Oct 9Oct 13Oct 17Oct 21Oct 24Oct 28Nov 1Nov 5
28°FOct 18Oct 24Oct 29Nov 1Nov 3Nov 6Nov 9Nov 13Nov 19
24°FNov 1Nov 5Nov 9Nov 12Nov 16Nov 20Nov 25Nov 29Dec 5
20°FNov 12Nov 17Nov 22Nov 26Nov 30Dec 3Dec 6Dec 12Dec 18
16°FNov 22Nov 29Dec 3Dec 7Dec 10Dec 15Dec 19Dec 23Dec 29

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°F168160155150145141136130123
32°F195187180176171166161156147
28°F220213208202198193187181174
24°F248239234229225220216210203
20°F271264257252247243239233226
16°F290283277272268264259254247

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
6,372
Cooling degree days, base 65°F
523
Growing degree days, base 40°F
4,735
Growing degree days, base 45°F
3,598
Growing degree days, base 50°F
2,608
Growing degree days, base 55°F
1,757
Growing degree days, base 60°F
1,054

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,20402
February1,05003
March923018
April547481
May26031265
June68105488
July16183632
August25139580
September13353374
October4158135
November711027
December1,02105

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 12.3 km from Edgewood. 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 USW00004857 (Ashtabula CO AP). Public domain.