Guntown climate

Guntown Frost Dates and Growing Season

NOAA 1991-2020 normals for Tupelo 2, 22 km from Guntown, elevation 350 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Tupelo 2. 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 237 days.

Median at 36°F
last April 3, first October 31
Median at 32°F
last March 21, first November 10
Median at 28°F
last March 7, first November 22

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 13Apr 9Apr 6Apr 3Mar 31Mar 27Mar 23Mar 16
32°FApr 7Apr 1Mar 29Mar 25Mar 21Mar 17Mar 12Mar 7Feb 28
28°FMar 25Mar 20Mar 16Mar 11Mar 7Mar 3Feb 28Feb 23Feb 14
24°FMar 15Mar 7Mar 2Feb 27Feb 23Feb 15Feb 8Feb 1Jan 25
20°FMar 3Feb 26Feb 17Feb 10Feb 4Jan 31Jan 26Jan 20Jan 10
16°FFeb 24Feb 10Feb 3Jan 31Jan 27Jan 22Jan 16Jan 9Dec 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 19Oct 23Oct 26Oct 29Oct 31Nov 2Nov 5Nov 9Nov 14
32°FOct 30Nov 1Nov 4Nov 7Nov 10Nov 14Nov 18Nov 22Nov 28
28°FNov 5Nov 10Nov 14Nov 18Nov 22Nov 26Dec 1Dec 4Dec 12
24°FNov 14Nov 23Nov 28Dec 1Dec 5Dec 10Dec 19Dec 29Jan 6
20°FNov 30Dec 6Dec 15Dec 24Jan 1Jan 3Jan 8Jan 14Jan 25
16°FDec 13Dec 26Jan 1Jan 4Jan 8Jan 12Jan 17Jan 24Feb 2

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°F234226220216212207202197190
32°F260252247242237231226220212
28°F292282275269263257251245236
24°F327315306299293286278270259
20°F361343336331323316308301288
16°F365365365356347340334328314

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
70% 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
3,014
Cooling degree days, base 65°F
1,998
Growing degree days, base 40°F
8,346
Growing degree days, base 45°F
6,776
Growing degree days, base 50°F
5,349
Growing degree days, base 55°F
4,072
Growing degree days, base 60°F
2,957

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January735138
February548261
March37511172
April14858369
May29198634
June0384834
July0491956
August0479944
September10286726
October13480418
November3978141
December639256

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 22 km from Guntown. 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 USC00229004 (Tupelo 2). Public domain.