Lakeport climate

Lakeport Frost Dates and Growing Season

NOAA 1991-2020 normals for Longview E Tx Rgnl AP, 2.8 km from Lakeport, elevation 365 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Longview E Tx Rgnl 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 8 and the first fall freeze around November 17, a growing season of about 251 days.

Median at 36°F
last March 25, first November 6
Median at 32°F
last March 8, first November 17
Median at 28°F
last February 24, first November 30

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 6Apr 2Mar 30Mar 25Mar 20Mar 15Mar 10Mar 2
32°FMar 31Mar 23Mar 17Mar 13Mar 8Mar 4Feb 28Feb 25Feb 19
28°FMar 15Mar 10Mar 5Mar 1Feb 24Feb 20Feb 14Feb 5Jan 28
24°FMar 5Feb 25Feb 17Feb 9Feb 3Jan 29Jan 23Jan 15Dec 31
20°FFeb 19Feb 8Feb 1Jan 26Jan 19Jan 12Jan 6Dec 31Dec 21
16°FFeb 8Feb 3Jan 26Jan 15Jan 11Jan 8Jan 5Jan 2Dec 25

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 6Nov 9Nov 12Nov 16Nov 21
32°FNov 2Nov 6Nov 10Nov 14Nov 17Nov 20Nov 24Nov 29Dec 3
28°FNov 11Nov 17Nov 22Nov 26Nov 30Dec 3Dec 8Dec 15Dec 25
24°FNov 24Dec 1Dec 6Dec 12Dec 20Dec 27Jan 1Jan 7Jan 19
20°FDec 7Dec 17Dec 25Dec 31Jan 3Jan 8Jan 15Jan 27Feb 6
16°FDec 24Jan 1Jan 3Jan 6Jan 9Jan 10Jan 17Feb 1Feb 6

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°F251242237231226221215209202
32°F279271263256251245239232223
28°F315303295286279273266258250
24°F355341334328320311302293282
20°F365365365365357348340329317
16°F365365365365365365365365350

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
62% of years
16°F or colder
22% 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
2,136
Cooling degree days, base 65°F
2,613
Growing degree days, base 40°F
9,677
Growing degree days, base 45°F
7,986
Growing degree days, base 50°F
6,422
Growing degree days, base 55°F
4,995
Growing degree days, base 60°F
3,719

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January548591
February39611131
March23537292
April8297468
May10275730
June0465915
July05871,052
August05811,046
September3382829
October76138528
November28526233
December5018107

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 2.8 km from Lakeport. 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 USW00003901 (Longview E Tx Rgnl AP). Public domain.