Stonewall climate

Stonewall Frost Dates and Growing Season

NOAA 1991-2020 normals for Shreveport Sthrn Hills, 12.9 km from Stonewall, elevation 200 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Shreveport Sthrn Hills. 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 12 and the first fall freeze around November 15, a growing season of about 247 days.

Median at 36°F
last March 29, first November 4
Median at 32°F
last March 12, first November 15
Median at 28°F
last February 28, first December 1

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 16Apr 9Apr 6Apr 2Mar 29Mar 25Mar 20Mar 15Mar 9
32°FApr 1Mar 26Mar 21Mar 16Mar 12Mar 8Mar 3Feb 27Feb 20
28°FMar 17Mar 11Mar 6Mar 2Feb 28Feb 22Feb 16Feb 7Jan 30
24°FMar 7Mar 1Feb 21Feb 13Feb 5Jan 31Jan 27Jan 18Jan 8
20°FFeb 28Feb 12Feb 4Jan 30Jan 25Jan 19Jan 12Jan 6Dec 30
16°FFeb 13Feb 2Jan 29Jan 23Jan 18Jan 12Jan 7Jan 3Dec 27

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 22Oct 27Oct 31Nov 1Nov 4Nov 6Nov 10Nov 15Nov 21
32°FOct 31Nov 4Nov 7Nov 12Nov 15Nov 19Nov 25Nov 30Dec 5
28°FNov 9Nov 15Nov 21Nov 26Dec 1Dec 3Dec 8Dec 15Dec 25
24°FNov 22Dec 1Dec 6Dec 12Dec 20Dec 25Jan 1Jan 8Jan 20
20°FDec 8Dec 20Dec 27Jan 1Jan 5Jan 8Jan 15Jan 22Feb 2
16°FDec 19Dec 31Jan 2Jan 6Jan 10Jan 15Jan 21Jan 29Feb 7

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°F245238232227222216211206197
32°F275266259253247241236230221
28°F312300292285277269264256247
24°F352339332323316307301292277
20°F365365365360351342334326311
16°F365365365365365365365356339

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
96% of years
20°F or colder
70% of years
16°F or colder
29% 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
2,431
Cooling degree days, base 65°F
2,350
Growing degree days, base 40°F
9,148
Growing degree days, base 45°F
7,500
Growing degree days, base 50°F
5,985
Growing degree days, base 55°F
4,612
Growing degree days, base 60°F
3,398

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January608267
February4486101
March27823249
April10275427
May15238688
June0433883
July05471,012
August05501,015
September2350798
October102103470
November33816187
December538589

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 12.9 km from Stonewall. 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 USC00168444 (Shreveport Sthrn Hills). Public domain.