Sardis City climate

Sardis City Frost Dates and Growing Season

NOAA 1991-2020 normals for Sand Mt Substn, 19.1 km from Sardis City, elevation 1190 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Sand Mt Substn. 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 31 and the first fall freeze around November 3, a growing season of about 217 days.

Median at 36°F
last April 12, first October 25
Median at 32°F
last March 31, first November 3
Median at 28°F
last March 17, first November 14

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 26Apr 22Apr 19Apr 15Apr 12Apr 9Apr 5Apr 1Mar 27
32°FApr 16Apr 11Apr 7Apr 3Mar 31Mar 28Mar 24Mar 19Mar 14
28°FApr 5Mar 31Mar 26Mar 21Mar 17Mar 14Mar 9Mar 4Feb 27
24°FMar 25Mar 17Mar 12Mar 7Mar 3Feb 28Feb 24Feb 17Feb 8
20°FMar 13Mar 6Feb 28Feb 25Feb 19Feb 13Feb 6Jan 31Jan 20
16°FMar 4Feb 24Feb 15Feb 7Feb 2Jan 30Jan 23Jan 15Jan 5

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 14Oct 18Oct 21Oct 23Oct 25Oct 27Oct 30Nov 2Nov 6
32°FOct 22Oct 26Oct 30Nov 1Nov 3Nov 6Nov 9Nov 13Nov 18
28°FNov 1Nov 3Nov 7Nov 11Nov 14Nov 18Nov 23Nov 28Dec 3
24°FNov 9Nov 14Nov 19Nov 24Nov 29Dec 2Dec 6Dec 12Dec 25
20°FNov 20Nov 29Dec 3Dec 8Dec 15Dec 24Dec 31Jan 5Jan 14
16°FDec 6Dec 16Dec 24Dec 31Jan 4Jan 8Jan 14Jan 21Jan 31

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°F216209204200196192188183176
32°F241231226221217212208203197
28°F271259252247242235230225218
24°F302290281275269263257250242
20°F335324315308302295286278268
16°F365352343335330323314306298

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
99% of years
16°F or colder
90% 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
3,451
Cooling degree days, base 65°F
1,466
Growing degree days, base 40°F
7,465
Growing degree days, base 45°F
5,952
Growing degree days, base 50°F
4,588
Growing degree days, base 55°F
3,383
Growing degree days, base 60°F
2,341

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January786028
February607139
March4385139
April20830293
May58129537
June3285732
July0389854
August1368832
September19210640
October17945345
November4614106
December691142

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 19.1 km from Sardis City. 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 USC00017207 (Sand Mt Substn). Public domain.