Moyock climate

Moyock Frost Dates and Growing Season

NOAA 1991-2020 normals for Fentress Naas, 19.3 km from Moyock, elevation 16 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Fentress Naas. 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 23 and the first fall freeze around November 18, a growing season of about 240 days.

Median at 36°F
last April 3, first November 6
Median at 32°F
last March 23, first November 18
Median at 28°F
last March 10, first December 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°FApr 18Apr 14Apr 10Apr 7Apr 3Apr 1Mar 29Mar 25Mar 19
32°FApr 7Apr 2Mar 29Mar 26Mar 23Mar 20Mar 16Mar 11Mar 5
28°FMar 27Mar 21Mar 17Mar 13Mar 10Mar 5Mar 1Feb 25Feb 17
24°FMar 15Mar 8Mar 2Feb 27Feb 22Feb 15Feb 9Feb 1Jan 23
20°FFeb 28Feb 21Feb 13Feb 6Feb 1Jan 29Jan 22Jan 14Jan 4
16°FFeb 16Feb 6Jan 31Jan 29Jan 24Jan 19Jan 13Jan 5Dec 31

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 25Oct 30Nov 1Nov 4Nov 6Nov 9Nov 12Nov 16Nov 24
32°FNov 4Nov 8Nov 12Nov 15Nov 18Nov 22Nov 27Dec 1Dec 7
28°FNov 14Nov 19Nov 24Nov 29Dec 2Dec 5Dec 11Dec 19Dec 31
24°FNov 28Dec 4Dec 9Dec 15Dec 23Dec 29Jan 3Jan 9Jan 18
20°FDec 11Dec 22Dec 29Jan 2Jan 7Jan 12Jan 18Jan 24Feb 1
16°FDec 23Dec 31Jan 2Jan 7Jan 13Jan 17Jan 23Jan 29Feb 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°F238231225221216213208203196
32°F268259252245240236231226219
28°F300289282276270265259252242
24°F336325315308303298292284273
20°F365358348340334328319311303
16°F365365365365365355347338328

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
99% of years
20°F or colder
87% of years
16°F or colder
53% 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
2,810
Cooling degree days, base 65°F
2,130
Growing degree days, base 40°F
8,610
Growing degree days, base 45°F
6,997
Growing degree days, base 50°F
5,534
Growing degree days, base 55°F
4,233
Growing degree days, base 60°F
3,103

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January653154
February532575
March41516152
April17576363
May41204628
June2396845
July05461,010
August0465930
September4300745
October105100463
November32917182
December554587

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 19.3 km from Moyock. 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 USW00013762 (Fentress Naas). Public domain.