Garner climate

Garner Frost Dates and Growing Season

NOAA 1991-2020 normals for Garner, 6.2 km from Garner, elevation 330 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Garner. 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 1 and the first fall freeze around November 1, a growing season of about 213 days.

Median at 36°F
last April 13, first October 23
Median at 32°F
last April 1, first November 1
Median at 28°F
last March 22, first November 10

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 23Apr 20Apr 17Apr 13Apr 10Apr 7Apr 3Mar 31
32°FApr 15Apr 10Apr 6Apr 3Apr 1Mar 31Mar 27Mar 22Mar 17
28°FApr 5Mar 31Mar 29Mar 26Mar 22Mar 19Mar 15Mar 11Mar 4
24°FMar 27Mar 22Mar 18Mar 14Mar 10Mar 5Mar 2Feb 26Feb 16
20°FMar 16Mar 10Mar 5Mar 1Feb 25Feb 18Feb 10Feb 3Jan 24
16°FMar 5Feb 25Feb 15Feb 8Feb 2Jan 29Jan 22Jan 15Jan 4

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 12Oct 15Oct 18Oct 21Oct 23Oct 26Oct 30Nov 1Nov 5
32°FOct 19Oct 23Oct 27Oct 30Nov 1Nov 4Nov 6Nov 10Nov 15
28°FOct 28Nov 1Nov 4Nov 7Nov 10Nov 14Nov 18Nov 23Dec 1
24°FNov 6Nov 12Nov 17Nov 21Nov 26Nov 30Dec 3Dec 9Dec 21
20°FNov 20Nov 29Dec 3Dec 8Dec 14Dec 22Dec 29Jan 4Jan 13
16°FDec 7Dec 14Dec 25Jan 1Jan 4Jan 10Jan 15Jan 20Jan 31

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°F211204199196192188184178170
32°F234227222217213209205200195
28°F262252244239235230225220214
24°F291281273267261255249243234
20°F331316307302295287279272258
16°F365355344336330322313305295

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
99% of years
16°F or colder
87% 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
3,636
Cooling degree days, base 65°F
1,341
Growing degree days, base 40°F
7,110
Growing degree days, base 45°F
5,615
Growing degree days, base 50°F
4,295
Growing degree days, base 55°F
3,147
Growing degree days, base 60°F
2,162

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January781019
February636029
March4864107
April21324276
May65108509
June2272720
July0386851
August0352817
September28169591
October22424280
November500270
December702029

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 6.2 km from Garner. 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 USC00313238 (Garner). Public domain.