Double Springs climate

Double Springs Frost Dates and Growing Season

NOAA 1991-2020 normals for Haleyville, 23.5 km from Double Springs, elevation 920 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Haleyville. 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 29 and the first fall freeze around November 9, a growing season of about 228 days.

Median at 36°F
last April 10, first October 30
Median at 32°F
last March 29, first November 9
Median at 28°F
last March 14, first November 21

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 28Apr 22Apr 18Apr 13Apr 10Apr 7Apr 3Mar 30Mar 21
32°FApr 16Apr 10Apr 5Apr 1Mar 29Mar 24Mar 19Mar 14Mar 5
28°FApr 3Mar 27Mar 22Mar 17Mar 14Mar 9Mar 4Feb 28Feb 20
24°FMar 20Mar 14Mar 9Mar 4Feb 28Feb 24Feb 18Feb 10Jan 31
20°FMar 11Mar 3Feb 25Feb 18Feb 11Feb 5Jan 31Jan 23Jan 13
16°FMar 2Feb 18Feb 10Feb 3Jan 30Jan 24Jan 18Jan 11Jan 2

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 16Oct 20Oct 23Oct 27Oct 30Nov 1Nov 4Nov 8Nov 15
32°FOct 25Oct 31Nov 3Nov 5Nov 9Nov 12Nov 16Nov 21Nov 28
28°FNov 4Nov 8Nov 13Nov 17Nov 21Nov 26Dec 1Dec 5Dec 12
24°FNov 11Nov 18Nov 25Dec 1Dec 3Dec 7Dec 14Dec 24Jan 1
20°FNov 23Dec 1Dec 6Dec 13Dec 22Dec 28Jan 2Jan 8Jan 16
16°FDec 6Dec 18Dec 26Jan 1Jan 3Jan 7Jan 12Jan 19Jan 31

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°F226217212207203198193188181
32°F254244238233228222216211201
28°F283273265258252247241234224
24°F311301293285280274266258247
20°F342330323316308301294285272
16°F365357347340334328321311301

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
98% of years
16°F or colder
83% 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
2,996
Cooling degree days, base 65°F
1,781
Growing degree days, base 40°F
8,147
Growing degree days, base 45°F
6,570
Growing degree days, base 50°F
5,133
Growing degree days, base 55°F
3,849
Growing degree days, base 60°F
2,728

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January712144
February532164
March35813194
April15750356
May39163589
June2332780
July0440905
August0428893
September12270708
October14174408
November4048141
December640253

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 23.5 km from Double Springs. 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 USC00013620 (Haleyville). Public domain.