Issaquena County climate

Issaquena County Frost Dates and Growing Season

NOAA 1991-2020 normals for Lake Providence, 18.7 km from Issaquena County, elevation 100 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Lake Providence. 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 5 and the first fall freeze around November 24, a growing season of about 263 days.

Median at 36°F
last March 16, first November 12
Median at 32°F
last March 5, first November 24
Median at 28°F
last February 21, first December 7

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 2Mar 29Mar 25Mar 20Mar 16Mar 12Mar 9Mar 4Feb 27
32°FMar 22Mar 16Mar 12Mar 9Mar 5Mar 1Feb 27Feb 21Feb 13
28°FMar 11Mar 6Mar 1Feb 27Feb 21Feb 14Feb 6Jan 31Jan 20
24°FMar 3Feb 25Feb 15Feb 6Feb 1Jan 29Jan 22Jan 14Jan 3
20°FFeb 17Feb 5Jan 31Jan 27Jan 22Jan 16Jan 11Jan 4Dec 24
16°FFeb 9Feb 2Jan 29Jan 24Jan 20Jan 16Jan 12Jan 8Jan 2

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 29Nov 1Nov 5Nov 9Nov 12Nov 15Nov 18Nov 23Nov 28
32°FNov 6Nov 12Nov 16Nov 19Nov 24Nov 28Dec 1Dec 5Dec 12
28°FNov 16Nov 23Nov 29Dec 2Dec 7Dec 13Dec 22Dec 28Jan 5
24°FDec 1Dec 11Dec 20Dec 27Jan 1Jan 5Jan 9Jan 15Jan 27
20°FDec 14Dec 24Jan 1Jan 5Jan 8Jan 13Jan 19Jan 26Feb 4
16°FJan 1Jan 2Jan 7Jan 10Jan 14Jan 18Jan 23Feb 1Feb 5

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°F263255249244239234229223216
32°F295282275269263258253247240
28°F332320310303295287280271263
24°F365350343335330323314306295
20°F365365365365359350342334325
16°F365365365365365365365361342

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
89% of years
20°F or colder
59% of years
16°F or colder
21% 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
2,474
Cooling degree days, base 65°F
2,346
Growing degree days, base 40°F
9,135
Growing degree days, base 45°F
7,495
Growing degree days, base 50°F
5,987
Growing degree days, base 55°F
4,619
Growing degree days, base 60°F
3,400

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January630264
February463493
March29621238
April10480430
May13250702
June0435885
July05361,001
August0521986
September4353799
October88120501
November32517197
December553689

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 18.7 km from Issaquena County. 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 USC00165090 (Lake Providence). Public domain.