Como climate

Como Frost Dates and Growing Season

NOAA 1991-2020 normals for Senatobia, 13.5 km from Como, elevation 240 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Senatobia. 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 20 and the first fall freeze around November 4, a growing season of about 229 days.

Median at 36°F
last April 2, first October 27
Median at 32°F
last March 20, first November 4
Median at 28°F
last March 9, first November 16

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 17Apr 11Apr 8Apr 5Apr 2Mar 30Mar 26Mar 22Mar 16
32°FApr 5Apr 1Mar 29Mar 24Mar 20Mar 16Mar 13Mar 8Mar 3
28°FMar 25Mar 20Mar 16Mar 13Mar 9Mar 5Mar 2Feb 27Feb 21
24°FMar 17Mar 10Mar 6Mar 2Feb 28Feb 24Feb 20Feb 15Feb 7
20°FMar 8Mar 2Feb 26Feb 20Feb 15Feb 9Feb 2Jan 30Jan 20
16°FFeb 28Feb 18Feb 8Feb 2Jan 30Jan 25Jan 18Jan 10Dec 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 14Oct 19Oct 22Oct 24Oct 27Oct 29Nov 1Nov 4Nov 10
32°FOct 22Oct 27Oct 30Nov 1Nov 4Nov 7Nov 11Nov 16Nov 23
28°FNov 1Nov 5Nov 8Nov 12Nov 16Nov 21Nov 25Dec 1Dec 6
24°FNov 9Nov 14Nov 20Nov 25Dec 1Dec 4Dec 8Dec 16Dec 25
20°FNov 17Nov 27Dec 2Dec 9Dec 16Dec 24Dec 30Jan 4Jan 13
16°FDec 1Dec 12Dec 22Dec 30Jan 1Jan 5Jan 11Jan 18Feb 1

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°F229221215211208203199194188
32°F252244239234229224219214206
28°F277268261257251246241235226
24°F306296288282277271265259248
20°F339328317311306299292285273
16°F365360348341334328321313303

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
86% 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
3,106
Cooling degree days, base 65°F
2,023
Growing degree days, base 40°F
8,291
Growing degree days, base 45°F
6,743
Growing degree days, base 50°F
5,338
Growing degree days, base 55°F
4,085
Growing degree days, base 60°F
2,976

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January738036
February573153
March38313178
April15164375
May30201636
June0395844
July0504969
August0485950
September10284724
October15169392
November4038137
December667145

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 13.5 km from Como. 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 USC00227921 (Senatobia). Public domain.