Aliceville climate

Aliceville Frost Dates and Growing Season

NOAA 1991-2020 normals for Aliceville, 0.5 km from Aliceville, elevation 195 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Aliceville. 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 24 and the first fall freeze around November 8, a growing season of about 230 days.

Median at 36°F
last April 7, first October 31
Median at 32°F
last March 24, first November 8
Median at 28°F
last March 8, first November 20

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 24Apr 19Apr 15Apr 11Apr 7Apr 4Mar 31Mar 27Mar 19
32°FApr 13Apr 6Apr 2Mar 29Mar 24Mar 19Mar 15Mar 9Mar 1
28°FMar 29Mar 21Mar 17Mar 12Mar 8Mar 3Feb 27Feb 21Feb 13
24°FMar 14Mar 8Mar 3Feb 27Feb 22Feb 16Feb 10Feb 2Jan 26
20°FMar 3Feb 23Feb 16Feb 9Feb 3Jan 31Jan 25Jan 18Jan 7
16°FFeb 16Feb 6Feb 1Jan 30Jan 25Jan 20Jan 14Jan 8Dec 29

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 19Oct 23Oct 26Oct 28Oct 31Nov 1Nov 4Nov 8Nov 13
32°FOct 26Oct 31Nov 2Nov 5Nov 8Nov 12Nov 15Nov 19Nov 27
28°FNov 4Nov 8Nov 13Nov 16Nov 20Nov 26Dec 1Dec 4Dec 10
24°FNov 12Nov 19Nov 26Dec 1Dec 5Dec 9Dec 18Dec 27Jan 4
20°FNov 23Dec 2Dec 9Dec 19Dec 27Jan 1Jan 5Jan 11Jan 24
16°FDec 7Dec 19Dec 29Jan 1Jan 5Jan 10Jan 16Jan 23Feb 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°F230221216210206202198193185
32°F258248242235230225219213205
28°F288277271264259253247240231
24°F325313305297289281274266254
20°F357343334328321314306298284
16°F365365365360348340332324312

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
94% of years
16°F or colder
68% 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
2,621
Cooling degree days, base 65°F
2,041
Growing degree days, base 40°F
8,692
Growing degree days, base 45°F
7,060
Growing degree days, base 50°F
5,569
Growing degree days, base 55°F
4,226
Growing degree days, base 60°F
3,046

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January651156
February474483
March30719231
April13257381
May26193632
June0383832
July0498962
August0468933
September6308751
October11297455
November34913176
December565376

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 0.5 km from Aliceville. 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 USC00010178 (Aliceville). Public domain.