Lyndhurst climate

Lyndhurst Frost Dates and Growing Season

NOAA 1991-2020 normals for Waynesboro Wtp, 8.4 km from Lyndhurst, elevation 1270 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Waynesboro Wtp. 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 21 and the first fall freeze around October 23, a growing season of about 184 days.

Median at 36°F
last May 2, first October 13
Median at 32°F
last April 21, first October 23
Median at 28°F
last April 5, first November 1

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 21May 14May 9May 6May 2Apr 30Apr 26Apr 22Apr 18
32°FMay 10May 4Apr 30Apr 24Apr 21Apr 18Apr 15Apr 10Apr 4
28°FApr 22Apr 17Apr 13Apr 9Apr 5Apr 3Mar 31Mar 27Mar 21
24°FApr 9Apr 4Apr 1Mar 29Mar 26Mar 22Mar 18Mar 14Mar 6
20°FMar 30Mar 24Mar 20Mar 16Mar 13Mar 8Mar 4Feb 28Feb 21
16°FMar 19Mar 13Mar 7Mar 2Feb 28Feb 23Feb 18Feb 11Feb 3

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 5Oct 8Oct 11Oct 13Oct 16Oct 19Oct 23Oct 27
32°FOct 10Oct 14Oct 18Oct 21Oct 23Oct 26Oct 28Nov 1Nov 4
28°FOct 18Oct 24Oct 27Oct 30Nov 1Nov 4Nov 6Nov 10Nov 15
24°FOct 29Nov 2Nov 5Nov 8Nov 11Nov 14Nov 18Nov 24Dec 1
20°FNov 9Nov 14Nov 19Nov 23Nov 28Dec 1Dec 5Dec 11Dec 19
16°FNov 23Dec 1Dec 5Dec 10Dec 16Dec 21Dec 26Jan 1Jan 10

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°F182176170166162159155149142
32°F204196192188184179175170162
28°F227220215211207203200195187
24°F256247240236230227221216208
20°F287278271264259254249242235
16°F318308301295288283277270259

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
100% of years
20°F or colder
100% of years
16°F or colder
100% 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
4,851
Cooling degree days, base 65°F
904
Growing degree days, base 40°F
5,886
Growing degree days, base 45°F
4,570
Growing degree days, base 50°F
3,419
Growing degree days, base 55°F
2,426
Growing degree days, base 60°F
1,587

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January96706
February805010
March672046
April3679161
May14757380
June17178610
July2296759
August5253713
September6797481
October31913198
November614043
December870011

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 8.4 km from Lyndhurst. 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 USC00448941 (Waynesboro Wtp). Public domain.