Hickman climate

Hickman Frost Dates and Growing Season

NOAA 1991-2020 normals for Samburg Wr, 16.8 km from Hickman, elevation 310 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Samburg Wr. 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 3 and the first fall freeze around November 1, a growing season of about 211 days.

Median at 36°F
last April 16, first October 20
Median at 32°F
last April 3, first November 1
Median at 28°F
last March 23, first November 12

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 30Apr 25Apr 21Apr 18Apr 16Apr 13Apr 9Apr 5Mar 31
32°FApr 19Apr 15Apr 11Apr 7Apr 3Mar 31Mar 28Mar 24Mar 17
28°FApr 9Apr 4Mar 31Mar 28Mar 23Mar 19Mar 15Mar 9Mar 2
24°FMar 27Mar 20Mar 16Mar 11Mar 8Mar 4Mar 1Feb 25Feb 18
20°FMar 15Mar 9Mar 4Mar 1Feb 26Feb 21Feb 15Feb 10Feb 2
16°FMar 4Feb 28Feb 23Feb 16Feb 11Feb 5Jan 31Jan 26Jan 16

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 5Oct 11Oct 15Oct 18Oct 20Oct 23Oct 25Oct 28Nov 1
32°FOct 17Oct 22Oct 25Oct 28Nov 1Nov 2Nov 5Nov 10Nov 17
28°FOct 29Nov 1Nov 5Nov 8Nov 12Nov 16Nov 21Nov 27Dec 2
24°FNov 6Nov 12Nov 16Nov 21Nov 26Dec 1Dec 4Dec 8Dec 17
20°FNov 15Nov 24Dec 1Dec 4Dec 7Dec 13Dec 20Dec 26Jan 2
16°FDec 1Dec 6Dec 13Dec 20Dec 25Dec 30Jan 4Jan 11Jan 19

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°F208201195191188184180174168
32°F234225219215211207202196189
28°F264253247241236231227219212
24°F290281274268263257252244235
20°F316306300292287281275267257
16°F346333326319311306300292281

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
97% 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
4,021
Cooling degree days, base 65°F
1,423
Growing degree days, base 40°F
7,059
Growing degree days, base 45°F
5,641
Growing degree days, base 50°F
4,366
Growing degree days, base 55°F
3,234
Growing degree days, base 60°F
2,253

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January924012
February717020
March5187106
April24033273
May63122524
June3301748
July0392857
August1354818
September31178597
October22031295
November503593
December801021

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 16.8 km from Hickman. 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 USC00408065 (Samburg Wr). Public domain.