Campti climate

Campti Frost Dates and Growing Season

NOAA 1991-2020 normals for Natchitoches #2, 9.4 km from Campti, elevation 141 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Natchitoches #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 5 and the first fall freeze around November 17, a growing season of about 257 days.

Median at 36°F
last March 19, first November 7
Median at 32°F
last March 5, first November 17
Median at 28°F
last February 20, first December 1

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 6Apr 2Mar 28Mar 24Mar 19Mar 16Mar 11Mar 6Feb 28
32°FMar 23Mar 17Mar 12Mar 8Mar 5Mar 1Feb 26Feb 21Feb 14
28°FMar 12Mar 5Mar 1Feb 25Feb 20Feb 14Feb 7Jan 31Jan 23
24°FMar 1Feb 20Feb 12Feb 4Jan 31Jan 28Jan 22Jan 14Jan 2
20°FFeb 14Feb 3Jan 31Jan 26Jan 20Jan 15Jan 9Jan 2Dec 23
16°FFeb 3Jan 30Jan 23Jan 19Jan 13Jan 8Jan 5Jan 1Dec 23

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 3Nov 5Nov 7Nov 10Nov 13Nov 18Nov 24
32°FNov 3Nov 7Nov 10Nov 14Nov 17Nov 21Nov 26Dec 1Dec 6
28°FNov 10Nov 15Nov 21Nov 26Dec 1Dec 5Dec 10Dec 19Jan 1
24°FNov 21Nov 30Dec 7Dec 14Dec 23Dec 30Jan 3Jan 11Jan 21
20°FDec 4Dec 15Dec 26Jan 1Jan 3Jan 8Jan 14Jan 21Feb 2
16°FDec 18Dec 27Jan 1Jan 4Jan 8Jan 11Jan 16Jan 21Feb 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°F259250244239235230225219212
32°F285275268263257252247241233
28°F323310302293284277271262252
24°F360346337331323314305297286
20°F365365365365359350338332320
16°F365365365365365365365364345

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
58% 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
2,022
Cooling degree days, base 65°F
2,609
Growing degree days, base 40°F
9,779
Growing degree days, base 45°F
8,076
Growing degree days, base 50°F
6,487
Growing degree days, base 55°F
5,036
Growing degree days, base 60°F
3,737

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January526598
February37613147
March22943308
April68114499
May11285739
June0463913
July05641,029
August05621,027
September1389838
October73134527
November26928243
December4708119

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 9.4 km from Campti. 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 USC00166584 (Natchitoches #2). Public domain.