Longview Heights climate

Longview Heights Frost Dates and Growing Season

NOAA 1991-2020 normals for Longview, 4.5 km from Longview Heights, elevation 12 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Longview. 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 April 8 and the first fall freeze around November 5, a growing season of about 210 days.

Median at 36°F
last May 3, first October 21
Median at 32°F
last April 8, first November 5
Median at 28°F
last March 6, first November 24

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°FMay 24May 16May 10May 7May 3Apr 30Apr 27Apr 22Apr 15
32°FMay 2Apr 26Apr 20Apr 14Apr 8Apr 2Mar 29Mar 21Mar 11
28°FApr 4Mar 27Mar 17Mar 11Mar 6Feb 28Feb 24Feb 17Feb 6
24°FMar 3Feb 27Feb 21Feb 15Feb 10Jan 30Jan 14Jan 1Dec 14
20°FFeb 22Feb 14Feb 4Jan 22Jan 6Dec 30Dec 19Dec 10Dec 2
16°FFeb 12Jan 31Jan 8Dec 30Dec 22Dec 14Dec 10Dec 6Nov 28

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 2Oct 7Oct 13Oct 17Oct 21Oct 26Oct 30Nov 3Nov 10
32°FOct 17Oct 24Oct 29Nov 1Nov 5Nov 10Nov 15Nov 21Nov 28
28°FOct 31Nov 7Nov 13Nov 19Nov 24Nov 28Dec 3Dec 10Dec 20
24°FNov 13Nov 23Nov 29Dec 5Dec 11Dec 20Dec 26Jan 4Jan 29
20°FNov 25Dec 1Dec 7Dec 12Dec 20Dec 26Jan 2Jan 24Feb 12
16°FNov 27Dec 2Dec 7Dec 10Dec 15Dec 22Dec 31Jan 16Feb 2

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°F196186179174169164157150142
32°F244234225217210203196188177
28°F298285276269262253244234223
24°F359343332323315306298287272
20°F365365365365355344334324310
16°F365365365365365365365363339

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
59% 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
4,545
Cooling degree days, base 65°F
243
Growing degree days, base 40°F
4,979
Growing degree days, base 45°F
3,473
Growing degree days, base 50°F
2,268
Growing degree days, base 55°F
1,342
Growing degree days, base 60°F
665

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January73204
February60606
March552031
April413183
May2569226
June13824336
July4081507
August3391522
September10635380
October3412150
November576021
December75303

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 4.5 km from Longview Heights. 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 USC00454769 (Longview). Public domain.