Newbern climate

Newbern Frost Dates and Growing Season

NOAA 1991-2020 normals for Dyersburg Iii Golf, 18.3 km from Newbern, elevation 300 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Dyersburg Iii Golf. 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 28 and the first fall freeze around November 2, a growing season of about 221 days.

Median at 36°F
last April 8, first October 25
Median at 32°F
last March 28, first November 2
Median at 28°F
last March 14, first November 13

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 23Apr 18Apr 14Apr 11Apr 8Apr 5Apr 1Mar 29Mar 23
32°FApr 15Apr 8Apr 3Mar 31Mar 28Mar 24Mar 20Mar 16Mar 10
28°FApr 3Mar 28Mar 22Mar 17Mar 14Mar 10Mar 5Mar 1Feb 25
24°FMar 21Mar 14Mar 9Mar 5Mar 2Feb 27Feb 24Feb 19Feb 11
20°FMar 10Mar 3Feb 28Feb 24Feb 19Feb 15Feb 8Feb 3Jan 25
16°FMar 1Feb 24Feb 17Feb 11Feb 5Jan 31Jan 28Jan 19Jan 8

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 12Oct 17Oct 20Oct 22Oct 25Oct 27Oct 30Nov 1Nov 5
32°FOct 20Oct 25Oct 29Oct 31Nov 2Nov 5Nov 8Nov 12Nov 18
28°FNov 1Nov 4Nov 7Nov 10Nov 13Nov 17Nov 21Nov 26Dec 2
24°FNov 8Nov 14Nov 18Nov 22Nov 27Dec 1Dec 6Dec 14Dec 24
20°FNov 17Nov 27Dec 2Dec 7Dec 14Dec 21Dec 28Jan 3Jan 13
16°FDec 3Dec 11Dec 21Dec 28Jan 1Jan 5Jan 12Jan 18Jan 27

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°F219213209204200197193188181
32°F243236230225221217212207200
28°F270260254249244239234227218
24°F299288281276270264258251242
20°F331320312305300294285276264
16°F360346336330324316310304292

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
99% of years
16°F or colder
92% 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
3,585
Cooling degree days, base 65°F
1,830
Growing degree days, base 40°F
7,758
Growing degree days, base 45°F
6,280
Growing degree days, base 50°F
4,948
Growing degree days, base 55°F
3,767
Growing degree days, base 60°F
2,725

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January829021
February651133
March45510136
April19646318
May40183608
June1380829
July0477942
August0434899
September15240675
October18053352
November4885103
December729133

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 18.3 km from Newbern. 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 USW00003809 (Dyersburg Iii Golf). Public domain.