Lasara climate

Lasara Frost Dates and Growing Season

NOAA 1991-2020 normals for Raymondville, 12.6 km from Lasara, elevation 31 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Raymondville. 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 January 21 and the first fall freeze around December 26, a growing season of about 340 days.

Median at 36°F
last February 15, first December 8
Median at 32°F
last January 21, first December 26
Median at 28°F
last January 7, first January 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°FMar 16Mar 6Feb 28Feb 22Feb 15Feb 6Jan 29Jan 20Jan 3
32°FFeb 27Feb 17Feb 5Jan 29Jan 21Jan 11Jan 5Dec 31Dec 18
28°FFeb 8Jan 28Jan 18Jan 11Jan 7Jan 3Dec 31Dec 26Dec 15
24°FJan 27Jan 19Jan 12Jan 8Jan 7Jan 3Jan 1Dec 29Dec 20
20°F–––––––––
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 18Nov 25Nov 30Dec 4Dec 8Dec 14Dec 20Dec 27Jan 5
32°FDec 1Dec 6Dec 13Dec 19Dec 26Jan 1Jan 5Jan 12Feb 1
28°FDec 9Dec 18Dec 25Dec 31Jan 2Jan 5Jan 9Jan 16Feb 1
24°FDec 19Dec 25Jan 1Jan 2Jan 5Jan 7Jan 10Jan 16Jan 22
20°F–––––––––
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°F342329317308301293284275262
32°F365365358349340334327315301
28°F365365365365365365362352336
24°F365365365365365365365365365
20°F365365365365365365365365365
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
98% of years
32°F or colder
77% of years
28°F or colder
36% of years
24°F or colder
11% of years
20°F or colder
1% of years
16°F or colder
0% 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
668
Cooling degree days, base 65°F
4,133
Growing degree days, base 40°F
12,595
Growing degree days, base 45°F
10,784
Growing degree days, base 50°F
9,001
Growing degree days, base 55°F
7,274
Growing degree days, base 60°F
5,641

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January21652326
February12091402
March55190602
April11313752
May0475939
June05891,039
July06481,113
August06691,135
September0521971
October7358815
November69158543
December18870365

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 12.6 km from Lasara. 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 USC00417458 (Raymondville). Public domain.