Eden climate

Eden Frost Dates and Growing Season

NOAA 1991-2020 normals for Eden, 0.6 km from Eden, elevation 2050 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 5 and the first fall freeze around November 4, a growing season of about 213 days.

Median at 36°F
last April 16, first October 27
Median at 32°F
last April 5, first November 4
Median at 28°F
last March 20, first November 13

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°FApr 30Apr 26Apr 23Apr 19Apr 16Apr 13Apr 9Apr 6Mar 31
32°FApr 23Apr 17Apr 12Apr 8Apr 5Apr 1Mar 28Mar 22Mar 14
28°FApr 9Apr 3Mar 30Mar 25Mar 20Mar 16Mar 13Mar 8Mar 1
24°FMar 28Mar 20Mar 16Mar 13Mar 9Mar 5Mar 1Feb 24Feb 15
20°FMar 16Mar 11Mar 5Mar 1Feb 26Feb 20Feb 13Feb 4Jan 27
16°FMar 8Mar 1Feb 24Feb 15Feb 6Jan 30Jan 23Jan 14Jan 1

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 12Oct 18Oct 22Oct 24Oct 27Oct 31Nov 2Nov 5Nov 9
32°FOct 21Oct 27Oct 30Nov 2Nov 4Nov 7Nov 10Nov 14Nov 20
28°FOct 28Nov 2Nov 6Nov 10Nov 13Nov 17Nov 22Nov 26Dec 2
24°FNov 7Nov 12Nov 17Nov 22Nov 25Nov 29Dec 2Dec 6Dec 12
20°FNov 18Nov 25Nov 30Dec 3Dec 8Dec 11Dec 18Dec 25Jan 3
16°FDec 1Dec 8Dec 14Dec 21Dec 27Jan 1Jan 6Jan 14Feb 1

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°F213206201196192188184178172
32°F240229224218213208204197190
28°F265256249244239234228221212
24°F290282275269264259253246237
20°F328313304298290285278270260
16°F365351343334327317306299286

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
91% 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
2,612
Cooling degree days, base 65°F
2,229
Growing degree days, base 40°F
8,925
Growing degree days, base 45°F
7,305
Growing degree days, base 50°F
5,810
Growing degree days, base 55°F
4,454
Growing degree days, base 60°F
3,257

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January643155
February4526111
March30221242
April12781414
May28248685
June0416865
July0521986
August0519984
September11293732
October111107470
November34915192
December588375

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 0.6 km from Eden. 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 USC00412741 (Eden). Public domain.