Morven climate

Morven Frost Dates and Growing Season

NOAA 1991-2020 normals for Valdosta Rgnl AP, 27.7 km from Morven, elevation 198 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Valdosta Rgnl 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 10 and the first fall freeze around November 21, a growing season of about 259 days.

Median at 36°F
last March 25, first November 10
Median at 32°F
last March 10, first November 21
Median at 28°F
last February 20, first December 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°FApr 14Apr 7Apr 2Mar 29Mar 25Mar 21Mar 16Mar 11Mar 2
32°FMar 31Mar 23Mar 19Mar 14Mar 10Mar 5Feb 28Feb 24Feb 15
28°FMar 14Mar 6Mar 1Feb 26Feb 20Feb 13Feb 7Feb 1Jan 24
24°FFeb 27Feb 18Feb 10Feb 5Jan 31Jan 27Jan 22Jan 13Jan 4
20°FFeb 14Feb 5Jan 31Jan 26Jan 21Jan 15Jan 7Jan 1Dec 26
16°FFeb 13Feb 1Jan 29Jan 22Jan 16Jan 9Jan 4Dec 31Dec 26

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 26Nov 1Nov 4Nov 7Nov 10Nov 13Nov 17Nov 20Nov 29
32°FNov 3Nov 9Nov 14Nov 18Nov 21Nov 25Dec 1Dec 5Dec 13
28°FNov 16Nov 23Nov 29Dec 3Dec 7Dec 14Dec 24Jan 1Jan 9
24°FDec 1Dec 6Dec 14Dec 24Dec 31Jan 4Jan 10Jan 17Jan 30
20°FDec 13Dec 23Dec 30Jan 3Jan 7Jan 13Jan 20Jan 27Feb 6
16°FDec 23Dec 29Jan 1Jan 5Jan 11Jan 19Jan 27Jan 31Feb 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°F259250244237232227221215206
32°F292279271265259252247240229
28°F330316309301293286277269257
24°F364350340334328321313305293
20°F365365365365360352342334322
16°F365365365365365365365365346

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
99% of years
24°F or colder
89% of years
20°F or colder
54% of years
16°F or colder
17% 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
1,649
Cooling degree days, base 65°F
2,410
Growing degree days, base 40°F
9,915
Growing degree days, base 45°F
8,162
Growing degree days, base 50°F
6,500
Growing degree days, base 55°F
4,973
Growing degree days, base 60°F
3,601

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January4496132
February30312173
March19037326
April6298488
May7266724
June0420870
July0499964
August0504969
September1365814
October46159579
November21333287
December37912174

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 27.7 km from Morven. 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 USW00093845 (Valdosta Rgnl AP). Public domain.