Panola County climate

Panola County Frost Dates and Growing Season

NOAA 1991-2020 normals for Sardis Dam, 15.2 km from Panola County, elevation 303 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Sardis Dam. 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 15 and the first fall freeze around November 15, a growing season of about 244 days.

Median at 36°F
last March 31, first November 4
Median at 32°F
last March 15, first November 15
Median at 28°F
last March 3, first November 28

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 20Apr 11Apr 6Apr 3Mar 31Mar 27Mar 23Mar 17Mar 12
32°FApr 4Mar 29Mar 23Mar 18Mar 15Mar 12Mar 8Mar 4Feb 27
28°FMar 21Mar 14Mar 10Mar 7Mar 3Feb 28Feb 25Feb 19Feb 10
24°FMar 11Mar 5Mar 1Feb 25Feb 20Feb 13Feb 5Jan 29Jan 19
20°FMar 3Feb 25Feb 15Feb 5Jan 31Jan 25Jan 17Jan 10Jan 2
16°FFeb 20Feb 6Jan 31Jan 27Jan 20Jan 16Jan 10Jan 4Dec 30

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 22Oct 27Oct 30Nov 1Nov 4Nov 7Nov 11Nov 16Nov 22
32°FOct 31Nov 4Nov 8Nov 12Nov 15Nov 19Nov 24Dec 1Dec 5
28°FNov 7Nov 14Nov 19Nov 24Nov 28Dec 2Dec 6Dec 13Dec 22
24°FNov 18Nov 26Dec 2Dec 8Dec 14Dec 21Dec 26Jan 1Jan 9
20°FDec 5Dec 15Dec 23Dec 28Jan 1Jan 4Jan 9Jan 16Feb 1
16°FDec 16Dec 28Jan 1Jan 4Jan 9Jan 14Jan 18Jan 25Feb 3

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°F243235230225220215210204196
32°F270261254249244239234228219
28°F299289280274269263258250242
24°F334322313305299292286277266
20°F365358349340334326315306293
16°F365365365365363354345336320

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
99% of years
20°F or colder
87% of years
16°F or colder
53% 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
2,871
Cooling degree days, base 65°F
2,275
Growing degree days, base 40°F
8,747
Growing degree days, base 45°F
7,166
Growing degree days, base 50°F
5,722
Growing degree days, base 55°F
4,420
Growing degree days, base 60°F
3,272

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January711143
February533371
March35115197
April13572397
May24230671
June0429879
July05441,009
August0527992
September5335780
October113104460
November37512162
December624362

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 15.2 km from Panola County. 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 USC00227815 (Sardis Dam). Public domain.