Nahunta climate

Nahunta Frost Dates and Growing Season

NOAA 1991-2020 normals for Nahunta 6NE, 9.7 km from Nahunta, elevation 68 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Nahunta 6NE. 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 25 and the first fall freeze around November 15, a growing season of about 236 days.

Median at 36°F
last April 6, first November 5
Median at 32°F
last March 25, first November 15
Median at 28°F
last March 10, first November 27

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 25Apr 19Apr 15Apr 11Apr 6Apr 3Mar 30Mar 25Mar 19
32°FApr 15Apr 8Apr 2Mar 29Mar 25Mar 21Mar 17Mar 10Mar 2
28°FMar 31Mar 25Mar 19Mar 15Mar 10Mar 5Mar 1Feb 23Feb 9
24°FMar 19Mar 11Mar 5Feb 28Feb 20Feb 12Feb 5Jan 26Jan 13
20°FMar 4Feb 24Feb 14Feb 7Jan 31Jan 24Jan 17Jan 5Dec 25
16°FFeb 16Feb 8Feb 3Jan 31Jan 22Jan 16Jan 7Dec 30Dec 19

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 20Oct 27Oct 31Nov 2Nov 5Nov 7Nov 10Nov 15Nov 19
32°FOct 31Nov 4Nov 7Nov 11Nov 15Nov 17Nov 21Nov 25Dec 2
28°FNov 8Nov 15Nov 19Nov 23Nov 27Dec 1Dec 7Dec 15Dec 27
24°FNov 23Nov 29Dec 3Dec 9Dec 16Dec 25Jan 1Jan 9Jan 22
20°FDec 3Dec 11Dec 19Dec 29Jan 3Jan 10Jan 18Jan 29Feb 8
16°FDec 12Dec 22Dec 30Jan 5Jan 12Jan 19Jan 26Feb 3Feb 11

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°F239229222217213207202196188
32°F267255248241236230224218210
28°F301287278271266260253244235
24°F341331321311304295286279265
20°F365365355346337331324312301
16°F365365365365365365359344330

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
97% of years
20°F or colder
75% of years
16°F or colder
32% 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
1,927
Cooling degree days, base 65°F
2,125
Growing degree days, base 40°F
9,372
Growing degree days, base 45°F
7,644
Growing degree days, base 50°F
6,026
Growing degree days, base 55°F
4,548
Growing degree days, base 60°F
3,239

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January4804116
February3566138
March24622269
April9969423
May15213663
June0384834
July0481945
August0462927
September2324772
October62125530
November24528262
December4237147

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 9.7 km from Nahunta. 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 USC00096219 (Nahunta 6NE). Public domain.