Belzoni climate

Belzoni Frost Dates and Growing Season

NOAA 1991-2020 normals for Belzoni, 0.8 km from Belzoni, elevation 115 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Belzoni. 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 3 and the first fall freeze around November 21, a growing season of about 263 days.

Median at 36°F
last March 17, first November 8
Median at 32°F
last March 3, first November 21
Median at 28°F
last February 18, first December 4

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 5Mar 31Mar 26Mar 21Mar 17Mar 12Mar 8Mar 3Feb 26
32°FMar 24Mar 16Mar 11Mar 8Mar 3Mar 1Feb 25Feb 18Feb 10
28°FMar 12Mar 6Mar 1Feb 25Feb 18Feb 12Feb 7Jan 31Jan 21
24°FMar 2Feb 23Feb 13Feb 7Feb 1Jan 28Jan 23Jan 16Jan 3
20°FFeb 24Feb 9Feb 1Jan 29Jan 23Jan 18Jan 12Jan 7Dec 28
16°FFeb 12Feb 3Jan 31Jan 25Jan 21Jan 15Jan 11Jan 4Dec 27

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

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°F261252246241235229224218210
32°F291281274268263258251245235
28°F327315308298292285276268258
24°F358348339333325317309299286
20°F365365365358350343336328315
16°F365365365365365365363350336

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
99% of years
24°F or colder
92% of years
20°F or colder
66% of years
16°F or colder
34% 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
2,515
Cooling degree days, base 65°F
2,331
Growing degree days, base 40°F
9,096
Growing degree days, base 45°F
7,462
Growing degree days, base 50°F
5,958
Growing degree days, base 55°F
4,594
Growing degree days, base 60°F
3,382

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January640160
February468595
March29222245
April10881428
May12264716
June0437886
July0522987
August0516981
September5347792
October96116490
November32916196
December564583

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 0.8 km from Belzoni. 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 USC00220660 (Belzoni). Public domain.