Whitehouse climate

Whitehouse Frost Dates and Growing Season

NOAA 1991-2020 normals for Tyler, 11.1 km from Whitehouse, elevation 550 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Tyler. 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 7 and the first fall freeze around November 21, a growing season of about 257 days.

Median at 36°F
last March 23, first November 9
Median at 32°F
last March 7, first November 21
Median at 28°F
last February 23, 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 11Apr 5Mar 31Mar 28Mar 23Mar 18Mar 14Mar 9Mar 3
32°FMar 27Mar 20Mar 15Mar 11Mar 7Mar 3Feb 28Feb 23Feb 17
28°FMar 15Mar 9Mar 4Feb 28Feb 23Feb 18Feb 11Feb 2Jan 25
24°FMar 5Feb 24Feb 16Feb 9Feb 3Jan 29Jan 23Jan 13Dec 31
20°FFeb 17Feb 7Feb 2Jan 28Jan 19Jan 14Jan 8Jan 2Dec 25
16°FFeb 10Feb 1Jan 27Jan 20Jan 14Jan 10Jan 5Jan 1Dec 24

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 3Nov 6Nov 9Nov 13Nov 17Nov 20Nov 27
32°FNov 4Nov 8Nov 13Nov 17Nov 21Nov 25Nov 29Dec 3Dec 9
28°FNov 15Nov 21Nov 27Dec 1Dec 4Dec 9Dec 15Dec 22Jan 2
24°FNov 30Dec 5Dec 12Dec 20Dec 26Jan 1Jan 6Jan 15Feb 1
20°FDec 13Dec 22Dec 29Jan 1Jan 5Jan 9Jan 14Jan 27Feb 4
16°FDec 20Dec 31Jan 2Jan 6Jan 10Jan 15Jan 22Jan 28Feb 5

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°F255248241236231226220214207
32°F285275269262257251246238230
28°F322310302296287281274266257
24°F365350340332326318309300288
20°F365365365365360352344334320
16°F365365365365365365365363347

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
90% of years
20°F or colder
53% of years
16°F or colder
19% 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
2,017
Cooling degree days, base 65°F
2,597
Growing degree days, base 40°F
9,777
Growing degree days, base 45°F
8,074
Growing degree days, base 50°F
6,483
Growing degree days, base 55°F
5,032
Growing degree days, base 60°F
3,730

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January526596
February36512147
March21344321
April72109490
May8278735
June0459909
July05691,034
August05701,035
September3375822
October67142542
November27526243
December4888111

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 11.1 km from Whitehouse. 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 USC00419207 (Tyler). Public domain.