Hickman County climate

Hickman County Frost Dates and Growing Season

NOAA 1991-2020 normals for Centerville Water Pl, 6.8 km from Hickman County, elevation 660 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Centerville Water Pl. 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 April 11 and the first fall freeze around October 24, a growing season of about 196 days.

Median at 36°F
last April 23, first October 16
Median at 32°F
last April 11, first October 24
Median at 28°F
last March 31, first November 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°FMay 10May 4Apr 30Apr 27Apr 23Apr 20Apr 16Apr 11Apr 5
32°FApr 27Apr 22Apr 18Apr 15Apr 11Apr 7Apr 3Mar 30Mar 22
28°FApr 16Apr 11Apr 7Apr 3Mar 31Mar 27Mar 22Mar 18Mar 11
24°FApr 6Mar 31Mar 26Mar 21Mar 17Mar 13Mar 7Mar 1Feb 23
20°FMar 23Mar 17Mar 11Mar 5Mar 1Feb 27Feb 22Feb 16Feb 10
16°FMar 11Mar 2Feb 27Feb 22Feb 15Feb 10Feb 5Jan 31Jan 22

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

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°F195189183179175171166161155
32°F219210205201196192188183176
28°F244234229224219215211206197
24°F271262256250245240234229220
20°F302291285278272266261254245
16°F335323316309303298291283271

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
100% of years
16°F or colder
99% 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
3,486
Cooling degree days, base 65°F
1,526
Growing degree days, base 40°F
7,508
Growing degree days, base 45°F
6,005
Growing degree days, base 50°F
4,655
Growing degree days, base 55°F
3,452
Growing degree days, base 60°F
2,404

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January812020
February619036
March4398137
April17446337
May49136552
June3297744
July0417882
August0380845
September21201630
October19434323
November4685113
December706037

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 6.8 km from Hickman County. 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 USC00401587 (Centerville Water Pl). Public domain.