Snow Hill climate

Snow Hill Frost Dates and Growing Season

NOAA 1991-2020 normals for Snow Hill 4 N, 6.3 km from Snow Hill, elevation 30 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Snow Hill 4 N. 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 10 and the first fall freeze around October 31, a growing season of about 202 days.

Median at 36°F
last April 23, first October 20
Median at 32°F
last April 10, first October 31
Median at 28°F
last March 29, first November 11

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 10May 4Apr 30Apr 27Apr 23Apr 21Apr 18Apr 14Apr 7
32°FApr 28Apr 21Apr 17Apr 14Apr 10Apr 6Apr 3Mar 31Mar 27
28°FApr 12Apr 6Apr 2Mar 31Mar 29Mar 26Mar 22Mar 18Mar 12
24°FMar 31Mar 27Mar 22Mar 18Mar 15Mar 12Mar 8Mar 3Feb 26
20°FMar 20Mar 15Mar 11Mar 6Mar 2Feb 27Feb 22Feb 16Feb 8
16°FMar 11Mar 4Feb 28Feb 22Feb 16Feb 10Feb 5Jan 30Jan 18

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 11Oct 14Oct 17Oct 20Oct 23Oct 26Oct 29Nov 2
32°FOct 16Oct 22Oct 25Oct 28Oct 31Nov 2Nov 5Nov 8Nov 14
28°FOct 28Nov 1Nov 5Nov 8Nov 11Nov 15Nov 19Nov 23Dec 1
24°FNov 7Nov 13Nov 18Nov 23Nov 27Dec 1Dec 4Dec 11Dec 21
20°FNov 21Nov 30Dec 4Dec 10Dec 16Dec 23Dec 28Jan 2Jan 10
16°FDec 9Dec 18Dec 25Dec 30Jan 3Jan 9Jan 13Jan 20Feb 1

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°F201194189184180175171166158
32°F223216211206202198194188182
28°F253245238234229224220215208
24°F286276269264258252248241234
20°F316307300294288283277269259
16°F347335328322315309304297289

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
97% 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
3,631
Cooling degree days, base 65°F
1,588
Growing degree days, base 40°F
7,414
Growing degree days, base 45°F
5,926
Growing degree days, base 50°F
4,599
Growing degree days, base 55°F
3,436
Growing degree days, base 60°F
2,431

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January792024
February667025
March541487
April25134260
May76131520
June8314756
July0446911
August0380845
September18222654
October17353353
November4305122
December675144

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 6.3 km from Snow Hill. 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 USC00188380 (Snow Hill 4 N). Public domain.