Beaumont climate

Beaumont Frost Dates and Growing Season

NOAA 1991-2020 normals for Beaumont City, 1.2 km from Beaumont, elevation 20 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Beaumont City. 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 February 14 and the first fall freeze around December 4, a growing season of about 299 days.

Median at 36°F
last March 1, first November 22
Median at 32°F
last February 14, first December 4
Median at 28°F
last January 28, first December 28

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°FMar 25Mar 16Mar 10Mar 5Mar 1Feb 26Feb 21Feb 16Feb 3
32°FMar 11Mar 2Feb 26Feb 19Feb 14Feb 6Jan 31Jan 28Jan 17
28°FFeb 22Feb 12Feb 4Jan 31Jan 28Jan 22Jan 17Jan 10Dec 28
24°FFeb 8Feb 2Jan 28Jan 21Jan 16Jan 12Jan 6Dec 31Dec 16
20°FFeb 1Jan 22Jan 17Jan 12Jan 9Jan 6Jan 4Jan 1Dec 29
16°F–––––––––

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°FNov 4Nov 9Nov 13Nov 18Nov 22Nov 26Dec 1Dec 4Dec 12
32°FNov 13Nov 20Nov 26Dec 1Dec 4Dec 10Dec 20Dec 30Jan 7
28°FNov 27Dec 3Dec 10Dec 20Dec 28Jan 2Jan 6Jan 13Jan 29
24°FDec 5Dec 18Dec 29Jan 1Jan 6Jan 10Jan 15Jan 23Feb 1
20°FDec 26Jan 1Jan 2Jan 4Jan 8Jan 10Jan 14Jan 21Feb 1
16°F–––––––––

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°F299286278271264259253245236
32°F336324311305299291283274261
28°F365360348342335329319310298
24°F365365365365365360350341329
20°F365365365365365365365365359
16°F365365365365365365365365365

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
99% of years
28°F or colder
86% of years
24°F or colder
46% of years
20°F or colder
12% of years
16°F or colder
1% 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
1,356
Cooling degree days, base 65°F
3,034
Growing degree days, base 40°F
10,823
Growing degree days, base 45°F
9,047
Growing degree days, base 50°F
7,351
Growing degree days, base 55°F
5,767
Growing degree days, base 60°F
4,318

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January38713169
February25823223
March13368408
April38154567
May2364826
June0517967
July05811,046
August05901,055
September0431880
October28216653
November16756352
December34222204

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 1.2 km from Beaumont. 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 USC00410611 (Beaumont City). Public domain.