Stewart County climate

Stewart County Frost Dates and Growing Season

NOAA 1991-2020 normals for Lumpkin 2 Se, 7.8 km from Stewart County, elevation 485 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lumpkin 2 Se. 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 1 and the first fall freeze around November 4, a growing season of about 217 days.

Median at 36°F
last April 13, first October 28
Median at 32°F
last April 1, first November 4
Median at 28°F
last March 17, first November 14

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 29Apr 24Apr 21Apr 17Apr 13Apr 10Apr 7Apr 2Mar 26
32°FApr 20Apr 13Apr 8Apr 5Apr 1Mar 29Mar 24Mar 19Mar 11
28°FApr 8Mar 31Mar 27Mar 22Mar 17Mar 12Mar 7Feb 28Feb 22
24°FMar 23Mar 14Mar 8Mar 2Feb 27Feb 22Feb 15Feb 7Jan 30
20°FMar 8Feb 28Feb 21Feb 15Feb 8Feb 2Jan 29Jan 20Jan 3
16°FFeb 25Feb 14Feb 6Feb 2Jan 29Jan 23Jan 17Jan 7Dec 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 14Oct 19Oct 22Oct 26Oct 28Oct 31Nov 1Nov 5Nov 9
32°FOct 22Oct 27Oct 31Nov 2Nov 4Nov 7Nov 10Nov 14Nov 19
28°FOct 31Nov 3Nov 7Nov 11Nov 14Nov 18Nov 21Nov 26Dec 3
24°FNov 8Nov 14Nov 20Nov 24Nov 29Dec 3Dec 7Dec 17Jan 1
20°FNov 22Dec 1Dec 5Dec 12Dec 21Dec 30Jan 4Jan 12Jan 25
16°FDec 6Dec 17Dec 25Jan 1Jan 6Jan 13Jan 20Jan 29Feb 5

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°F219212207202197193187181174
32°F243234228222217213208202196
28°F275262254248243237230224215
24°F314301292285276270262256246
20°F353339332322316306300289277
16°F365365365356347337332323310

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
67% 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
2,289
Cooling degree days, base 65°F
2,038
Growing degree days, base 40°F
8,937
Growing degree days, base 45°F
7,234
Growing degree days, base 50°F
5,678
Growing degree days, base 55°F
4,291
Growing degree days, base 60°F
3,076

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January557171
February415398
March27418240
April12464394
May21212656
June1380829
July0463928
August0456921
September3312759
October85109491
November31219202
December498290

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 7.8 km from Stewart County. 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 USC00095394 (Lumpkin 2 Se). Public domain.