Antlers climate

Antlers Frost Dates and Growing Season

NOAA 1991-2020 normals for Antlers, 1.2 km from Antlers, elevation 470 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Antlers. 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 213 days.

Median at 36°F
last April 14, first October 23
Median at 32°F
last April 3, first November 1
Median at 28°F
last March 20, first November 11

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 29Apr 24Apr 21Apr 17Apr 14Apr 12Apr 9Apr 5Mar 30
32°FApr 20Apr 14Apr 10Apr 6Apr 3Mar 31Mar 28Mar 22Mar 15
28°FApr 6Apr 1Mar 29Mar 24Mar 20Mar 17Mar 12Mar 7Feb 28
24°FMar 25Mar 19Mar 15Mar 11Mar 7Mar 4Feb 28Feb 24Feb 15
20°FMar 15Mar 8Mar 4Feb 28Feb 22Feb 16Feb 9Feb 2Jan 26
16°FMar 4Feb 25Feb 15Feb 9Feb 3Jan 30Jan 25Jan 16Dec 31

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 10Oct 14Oct 18Oct 21Oct 23Oct 26Oct 29Nov 1Nov 5
32°FOct 18Oct 23Oct 27Oct 31Nov 1Nov 4Nov 7Nov 11Nov 17
28°FOct 27Nov 2Nov 5Nov 7Nov 11Nov 14Nov 18Nov 24Dec 1
24°FNov 5Nov 10Nov 15Nov 19Nov 24Nov 28Dec 2Dec 5Dec 12
20°FNov 14Nov 21Nov 26Dec 1Dec 6Dec 11Dec 17Dec 24Jan 1
16°FNov 27Dec 3Dec 9Dec 17Dec 24Dec 31Jan 3Jan 10Jan 25

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°F213207200196192188184178172
32°F237228223217213209204198191
28°F261253246241236231226219211
24°F289278272266260255250243233
20°F324311303295289281275267256
16°F362348338332324316307298285

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
93% 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
3,182
Cooling degree days, base 65°F
2,013
Growing degree days, base 40°F
8,223
Growing degree days, base 45°F
6,678
Growing degree days, base 50°F
5,283
Growing degree days, base 55°F
4,041
Growing degree days, base 60°F
2,949

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January762125
February560253
March3969161
April16844338
May33177609
June1383832
July0519984
August0507972
September12285723
October14378409
November4189137
December689140

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 1.2 km from Antlers. 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 USC00340256 (Antlers). Public domain.