Deville climate

Deville Frost Dates and Growing Season

NOAA 1991-2020 normals for Alexandria Esler Rgnl AP, 13 km from Deville, elevation 112 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Alexandria Esler Rgnl 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 March 16 and the first fall freeze around November 8, a growing season of about 239 days.

Median at 36°F
last March 31, first October 31
Median at 32°F
last March 16, first November 8
Median at 28°F
last February 28, first November 22

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 18Apr 11Apr 7Apr 3Mar 31Mar 27Mar 22Mar 16Mar 10
32°FApr 6Mar 31Mar 26Mar 20Mar 16Mar 12Mar 7Mar 1Feb 25
28°FMar 20Mar 14Mar 9Mar 4Feb 28Feb 25Feb 19Feb 11Jan 31
24°FMar 10Mar 2Feb 26Feb 18Feb 7Jan 31Jan 26Jan 18Jan 6
20°FFeb 28Feb 13Feb 3Jan 29Jan 24Jan 18Jan 12Jan 3Dec 25
16°FFeb 9Jan 31Jan 26Jan 21Jan 16Jan 11Jan 6Jan 1Dec 25

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

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°F239230224219215210205198190
32°F268257250244239233227220212
28°F303290281274269262256249239
24°F344333323315307300291282269
20°F365365365354345338332322308
16°F365365365365365365365354336

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
98% of years
20°F or colder
70% of years
16°F or colder
32% 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
2,052
Cooling degree days, base 65°F
2,429
Growing degree days, base 40°F
9,563
Growing degree days, base 45°F
7,855
Growing degree days, base 50°F
6,272
Growing degree days, base 55°F
4,829
Growing degree days, base 60°F
3,541

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January5226100
February37113141
March22240306
April8399468
May10264719
June0435885
July0529994
August0522987
September3360807
October82127513
November28723227
December47311126

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 13 km from Deville. 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 USW00013935 (Alexandria Esler Rgnl AP). Public domain.