Newark climate

Newark Frost Dates and Growing Season

NOAA 1991-2020 normals for Ft Worth Alliance AP, 15.8 km from Newark, elevation 685 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Ft Worth Alliance 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 12 and the first fall freeze around November 17, a growing season of about 249 days.

Median at 36°F
last March 27, first November 6
Median at 32°F
last March 12, first November 17
Median at 28°F
last February 28, first December 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°FApr 18Apr 9Apr 3Mar 31Mar 27Mar 22Mar 17Mar 12Mar 6
32°FApr 3Mar 27Mar 21Mar 16Mar 12Mar 9Mar 4Feb 28Feb 21
28°FMar 19Mar 12Mar 8Mar 4Feb 28Feb 24Feb 18Feb 11Feb 1
24°FMar 8Mar 2Feb 25Feb 18Feb 11Feb 4Jan 29Jan 21Jan 8
20°FFeb 28Feb 16Feb 6Jan 31Jan 24Jan 17Jan 8Dec 31Dec 20
16°FFeb 11Feb 2Jan 26Jan 19Jan 11Jan 4Dec 31Dec 22Dec 16

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 21Oct 26Oct 30Nov 2Nov 6Nov 9Nov 13Nov 18Nov 23
32°FOct 31Nov 5Nov 8Nov 12Nov 17Nov 20Nov 25Nov 30Dec 5
28°FNov 10Nov 16Nov 22Nov 27Dec 1Dec 4Dec 9Dec 15Dec 24
24°FNov 25Dec 2Dec 6Dec 11Dec 17Dec 23Dec 30Jan 6Jan 19
20°FDec 6Dec 12Dec 18Dec 23Dec 29Jan 3Jan 11Jan 20Feb 2
16°FDec 12Dec 18Dec 22Dec 28Jan 2Jan 8Jan 16Jan 24Feb 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°F250242235229225219213206196
32°F276267261255249244239231222
28°F309296289282276271265258249
24°F345333324315307301294285274
20°F365365359350343334326316303
16°F365365365365365365355346332

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
98% of years
20°F or colder
77% of years
16°F or colder
41% 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
2,214
Cooling degree days, base 65°F
2,930
Growing degree days, base 40°F
9,943
Growing degree days, base 45°F
8,266
Growing degree days, base 50°F
6,710
Growing degree days, base 55°F
5,299
Growing degree days, base 60°F
4,036

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January572376
February41310123
March24841292
April86110477
May12298752
June0532982
July06711,136
August06651,130
September3405852
October74156550
November28131245
December525695

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 15.8 km from Newark. 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 USW00053909 (Ft Worth Alliance AP). Public domain.