Broxton climate

Broxton Frost Dates and Growing Season

NOAA 1991-2020 normals for Pridgen, 8.6 km from Broxton, elevation 300 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Pridgen. 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 17, a growing season of about 252 days.

Median at 36°F
last March 25, first November 7
Median at 32°F
last March 12, first November 17
Median at 28°F
last February 25, first December 4

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

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 26Oct 31Nov 1Nov 4Nov 7Nov 10Nov 13Nov 16Nov 22
32°FNov 1Nov 6Nov 10Nov 14Nov 17Nov 21Nov 25Dec 1Dec 10
28°FNov 12Nov 20Nov 25Nov 29Dec 4Dec 9Dec 18Dec 31Jan 8
24°FNov 26Dec 4Dec 11Dec 22Jan 1Jan 4Jan 10Jan 17Jan 27
20°FDec 10Dec 23Jan 1Jan 6Jan 12Jan 17Jan 24Jan 29Feb 9
16°FDec 27Jan 2Jan 8Jan 12Jan 17Jan 20Jan 28Feb 1Feb 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°F252244238233228223218213207
32°F282272264258252248243237227
28°F320308300293285279270262252
24°F362347336329322314306298286
20°F365365365365355345337328315
16°F365365365365365365365359339

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
93% of years
20°F or colder
62% of years
16°F or colder
24% 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
1,993
Cooling degree days, base 65°F
2,205
Growing degree days, base 40°F
9,389
Growing degree days, base 45°F
7,666
Growing degree days, base 50°F
6,061
Growing degree days, base 55°F
4,608
Growing degree days, base 60°F
3,319

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January5154103
February3666127
March24223272
April8383452
May12240693
June0399849
July0496961
August0471936
September2332780
October67122523
November27121227
December4368139

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 8.6 km from Broxton. 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 USC00097171 (Pridgen). Public domain.