Brunswick County climate

Brunswick County Frost Dates and Growing Season

NOAA 1991-2020 normals for Lawrenceville 3 E, 5.9 km from Brunswick County, elevation 325 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lawrenceville 3 E. 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 7 and the first fall freeze around October 31, a growing season of about 205 days.

Median at 36°F
last April 20, first October 21
Median at 32°F
last April 7, first October 31
Median at 28°F
last March 26, first November 7

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 5Apr 29Apr 25Apr 22Apr 20Apr 17Apr 15Apr 11Apr 6
32°FApr 22Apr 18Apr 14Apr 11Apr 7Apr 4Apr 1Mar 29Mar 22
28°FApr 12Apr 5Apr 2Mar 30Mar 26Mar 23Mar 19Mar 15Mar 9
24°FMar 28Mar 23Mar 19Mar 16Mar 12Mar 9Mar 4Feb 28Feb 21
20°FMar 17Mar 11Mar 6Mar 2Feb 28Feb 23Feb 17Feb 9Feb 1
16°FMar 6Feb 28Feb 21Feb 14Feb 6Feb 1Jan 28Jan 21Jan 12

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 7Oct 12Oct 16Oct 19Oct 21Oct 24Oct 27Oct 31Nov 3
32°FOct 16Oct 21Oct 25Oct 27Oct 31Nov 1Nov 4Nov 7Nov 12
28°FOct 25Oct 31Nov 2Nov 5Nov 7Nov 11Nov 15Nov 18Nov 23
24°FNov 2Nov 8Nov 12Nov 16Nov 20Nov 24Nov 28Dec 3Dec 11
20°FNov 13Nov 20Nov 27Dec 2Dec 6Dec 13Dec 23Dec 30Jan 10
16°FNov 30Dec 8Dec 16Dec 25Dec 31Jan 4Jan 10Jan 15Jan 24

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°F202196191187184180176171164
32°F224218212209205201197191186
28°F252243236231227223218213206
24°F280270263258252247242237228
20°F317307299291284277270263253
16°F347335329322314308303295283

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
93% 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
3,767
Cooling degree days, base 65°F
1,468
Growing degree days, base 40°F
7,191
Growing degree days, base 45°F
5,722
Growing degree days, base 50°F
4,419
Growing degree days, base 55°F
3,281
Growing degree days, base 60°F
2,298

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January823017
February671021
March515597
April24437268
May69128525
June6300744
July0415880
August0363828
September27184607
October21433299
November4852101
December714133

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 5.9 km from Brunswick County. 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 USC00444768 (Lawrenceville 3 E). Public domain.