Sherman climate

Sherman Frost Dates and Growing Season

NOAA 1991-2020 normals for Tupelo Rgnl AP, 12.5 km from Sherman, elevation 361 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Tupelo 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 21 and the first fall freeze around November 10, a growing season of about 235 days.

Median at 36°F
last April 4, first November 1
Median at 32°F
last March 21, first November 10
Median at 28°F
last March 5, first November 23

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 19Apr 12Apr 9Apr 6Apr 4Apr 1Mar 29Mar 24Mar 17
32°FApr 6Apr 2Mar 30Mar 26Mar 21Mar 17Mar 13Mar 8Feb 28
28°FMar 24Mar 18Mar 14Mar 9Mar 5Feb 28Feb 26Feb 21Feb 12
24°FMar 13Mar 4Feb 27Feb 23Feb 18Feb 13Feb 7Jan 31Jan 24
20°FFeb 28Feb 20Feb 13Feb 7Feb 1Jan 29Jan 24Jan 16Jan 8
16°FFeb 14Feb 6Jan 31Jan 28Jan 24Jan 18Jan 14Jan 8Dec 31

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 24Oct 27Oct 29Nov 1Nov 3Nov 5Nov 8Nov 14
32°FOct 29Nov 1Nov 4Nov 7Nov 10Nov 14Nov 17Nov 22Nov 28
28°FNov 6Nov 10Nov 14Nov 19Nov 23Nov 26Dec 1Dec 5Dec 13
24°FNov 15Nov 23Nov 27Dec 2Dec 7Dec 13Dec 20Dec 28Jan 5
20°FNov 29Dec 8Dec 17Dec 25Jan 1Jan 3Jan 8Jan 14Jan 23
16°FDec 16Dec 29Jan 1Jan 5Jan 9Jan 12Jan 16Jan 20Jan 30

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°F233226220216211208203198192
32°F260251245240235230225218211
28°F289279273267262257252246238
24°F325312305299292286279271262
20°F361346338332324317310302292
16°F365365365363353346338333319

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
93% of years
16°F or colder
65% 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
2,727
Cooling degree days, base 65°F
2,234
Growing degree days, base 40°F
8,806
Growing degree days, base 45°F
7,194
Growing degree days, base 50°F
5,723
Growing degree days, base 55°F
4,402
Growing degree days, base 60°F
3,238

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January671154
February498375
March32819212
April12472403
May20230676
June0425874
July05381,003
August0513978
September6321765
October11698452
November37012163
December594370

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 12.5 km from Sherman. 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 USW00093862 (Tupelo Rgnl AP). Public domain.