Eden climate

Eden Frost Dates and Growing Season

NOAA 1991-2020 normals for Eden, 2.7 km from Eden, elevation 678 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Eden. 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 11 and the first fall freeze around October 29, a growing season of about 201 days.

Median at 36°F
last April 23, first October 21
Median at 32°F
last April 11, first October 29
Median at 28°F
last March 30, 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 10May 4Apr 30Apr 26Apr 23Apr 20Apr 18Apr 14Apr 9
32°FApr 27Apr 20Apr 16Apr 13Apr 11Apr 7Apr 5Apr 2Mar 29
28°FApr 11Apr 7Apr 4Apr 1Mar 30Mar 28Mar 24Mar 20Mar 14
24°FApr 1Mar 29Mar 26Mar 22Mar 18Mar 15Mar 11Mar 6Feb 28
20°FMar 25Mar 18Mar 14Mar 9Mar 5Mar 1Feb 26Feb 16Feb 6
16°FMar 14Mar 7Mar 1Feb 26Feb 17Feb 8Feb 2Jan 27Jan 14

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 8Oct 13Oct 15Oct 18Oct 21Oct 23Oct 25Oct 28Nov 1
32°FOct 16Oct 21Oct 24Oct 26Oct 29Nov 1Nov 2Nov 5Nov 9
28°FOct 26Oct 30Nov 1Nov 4Nov 6Nov 9Nov 12Nov 15Nov 20
24°FNov 2Nov 7Nov 11Nov 14Nov 16Nov 20Nov 24Nov 28Dec 4
20°FNov 13Nov 19Nov 25Nov 29Dec 2Dec 6Dec 11Dec 20Dec 31
16°FNov 28Dec 4Dec 10Dec 19Dec 27Jan 1Jan 6Jan 13Jan 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°F199192188184180177172167160
32°F220214209205201198193188182
28°F245235229225221217213209203
24°F271261255249244239234229223
20°F309296287279273266260253243
16°F351336328318309303295287275

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
95% 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
3,978
Cooling degree days, base 65°F
1,279
Growing degree days, base 40°F
6,814
Growing degree days, base 45°F
5,383
Growing degree days, base 50°F
4,126
Growing degree days, base 55°F
3,024
Growing degree days, base 60°F
2,074

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January838011
February679023
March552388
April25622245
May83100483
June5252697
July0381846
August1331795
September34159574
October23130279
November537163
December763021

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 2.7 km from Eden. 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 USC00312631 (Eden). Public domain.