Quitman County climate

Quitman County Frost Dates and Growing Season

NOAA 1991-2020 normals for Weedon Fld AP, 14 km from Quitman County, elevation 285 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Weedon Fld 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 13 and the first fall freeze around November 17, a growing season of about 250 days.

Median at 36°F
last March 28, first November 5
Median at 32°F
last March 13, first November 17
Median at 28°F
last February 27, first December 2

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 13Apr 8Apr 4Mar 31Mar 28Mar 24Mar 19Mar 15Mar 7
32°FApr 1Mar 25Mar 20Mar 16Mar 13Mar 9Mar 4Feb 27Feb 20
28°FMar 19Mar 13Mar 8Mar 3Feb 27Feb 21Feb 15Feb 7Jan 29
24°FMar 8Mar 1Feb 20Feb 11Feb 6Feb 1Jan 28Jan 21Jan 6
20°FFeb 24Feb 10Feb 4Jan 31Jan 27Jan 20Jan 12Jan 4Dec 27
16°FFeb 9Feb 2Jan 31Jan 27Jan 22Jan 15Jan 10Jan 5Dec 30

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 24Oct 28Nov 1Nov 3Nov 5Nov 7Nov 11Nov 15Nov 22
32°FNov 2Nov 6Nov 9Nov 13Nov 17Nov 21Nov 25Dec 1Dec 8
28°FNov 10Nov 16Nov 22Nov 28Dec 2Dec 7Dec 15Dec 26Jan 5
24°FNov 22Dec 1Dec 7Dec 15Dec 26Jan 1Jan 7Jan 14Jan 27
20°FDec 5Dec 15Dec 27Jan 1Jan 6Jan 10Jan 17Jan 28Feb 5
16°FDec 15Jan 1Jan 3Jan 8Jan 14Jan 19Jan 25Jan 31Feb 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°F251241234228223219214207200
32°F277269261256250245240233222
28°F316304295287280274266258250
24°F352337330323315306300289276
20°F365365364352344336330321306
16°F365365365365365365364348333

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
94% of years
20°F or colder
68% of years
16°F or colder
30% 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
1,866
Cooling degree days, base 65°F
2,535
Growing degree days, base 40°F
9,843
Growing degree days, base 45°F
8,116
Growing degree days, base 50°F
6,502
Growing degree days, base 55°F
5,017
Growing degree days, base 60°F
3,685

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January5017114
February33910157
March21135308
April6497485
May7284742
June0450900
July05441,009
August05381,003
September1383832
October60147553
November25028252
December43413148

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 14 km from Quitman County. 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 USW00063872 (Weedon Fld AP). Public domain.