Noxubee County climate

Noxubee County Frost Dates and Growing Season

NOAA 1991-2020 normals for Macon 3N, 5.1 km from Noxubee County, elevation 250 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Macon 3N. 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 21 and the first fall freeze around November 7, a growing season of about 231 days.

Median at 36°F
last April 5, first October 29
Median at 32°F
last March 21, first November 7
Median at 28°F
last March 5, 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 22Apr 14Apr 10Apr 7Apr 5Apr 1Mar 29Mar 24Mar 17
32°FApr 8Apr 3Mar 30Mar 26Mar 21Mar 17Mar 12Mar 7Feb 28
28°FMar 22Mar 16Mar 12Mar 8Mar 5Mar 1Feb 26Feb 21Feb 15
24°FMar 12Mar 6Mar 1Feb 25Feb 20Feb 13Feb 7Feb 1Jan 23
20°FMar 2Feb 23Feb 15Feb 6Feb 1Jan 30Jan 24Jan 15Jan 4
16°FFeb 17Feb 6Jan 31Jan 28Jan 23Jan 18Jan 12Jan 5Dec 28

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 15Oct 20Oct 23Oct 26Oct 29Nov 1Nov 4Nov 7Nov 12
32°FOct 23Oct 29Nov 1Nov 4Nov 7Nov 11Nov 15Nov 18Nov 26
28°FNov 2Nov 8Nov 13Nov 16Nov 20Nov 24Nov 29Dec 2Dec 8
24°FNov 13Nov 22Nov 28Dec 1Dec 4Dec 8Dec 14Dec 24Jan 4
20°FDec 1Dec 6Dec 11Dec 18Dec 25Jan 1Jan 5Jan 11Jan 21
16°FDec 10Dec 19Dec 29Jan 1Jan 6Jan 10Jan 15Jan 21Feb 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°F229222216211207202198193185
32°F259250242237231226220214206
28°F290279272265260254249242234
24°F324312304298291283276269259
20°F360345336330322315308301287
16°F365365365361351342336328315

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
92% 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
2,804
Cooling degree days, base 65°F
1,982
Growing degree days, base 40°F
8,484
Growing degree days, base 45°F
6,881
Growing degree days, base 50°F
5,420
Growing degree days, base 55°F
4,106
Growing degree days, base 60°F
2,961

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January671251
February505271
March33913202
April13953372
May25205645
June0381831
July0474939
August0468933
September8289730
October12782427
November38210153
December609366

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 5.1 km from Noxubee 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 USC00225361 (Macon 3N). Public domain.