Huntertown climate

Huntertown Frost Dates and Growing Season

NOAA 1991-2020 normals for Garrett 1 S, 12.9 km from Huntertown, elevation 870 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Garrett 1 S. 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 May 2 and the first fall freeze around October 10, a growing season of about 159 days.

Median at 36°F
last May 11, first October 1
Median at 32°F
last May 2, first October 10
Median at 28°F
last April 22, first October 22

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 27May 22May 18May 15May 11May 8May 5May 2Apr 28
32°FMay 16May 11May 8May 5May 2Apr 30Apr 27Apr 23Apr 19
28°FMay 7May 2Apr 29Apr 25Apr 22Apr 19Apr 16Apr 13Apr 8
24°FApr 27Apr 21Apr 17Apr 14Apr 10Apr 7Apr 4Apr 1Mar 27
20°FApr 16Apr 9Apr 5Apr 2Mar 31Mar 28Mar 24Mar 20Mar 15
16°FApr 3Mar 30Mar 27Mar 23Mar 20Mar 17Mar 14Mar 10Mar 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°FSep 18Sep 22Sep 25Sep 29Oct 1Oct 3Oct 5Oct 8Oct 13
32°FSep 26Oct 2Oct 5Oct 8Oct 10Oct 13Oct 16Oct 19Oct 24
28°FOct 10Oct 14Oct 17Oct 20Oct 22Oct 25Oct 28Nov 1Nov 4
24°FOct 21Oct 26Oct 30Nov 1Nov 3Nov 5Nov 8Nov 12Nov 17
20°FNov 3Nov 6Nov 9Nov 12Nov 15Nov 18Nov 21Nov 25Dec 1
16°FNov 9Nov 14Nov 18Nov 22Nov 26Nov 30Dec 3Dec 7Dec 15

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°F159153148143140136132127121
32°F179173167163159156152146141
28°F203196190186182178174170162
24°F226220215210207202198193186
20°F252243238235230226222218212
16°F275267262257251246241235228

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
100% 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
6,590
Cooling degree days, base 65°F
540
Growing degree days, base 40°F
4,758
Growing degree days, base 45°F
3,646
Growing degree days, base 50°F
2,660
Growing degree days, base 55°F
1,809
Growing degree days, base 60°F
1,094

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,29100
February1,08101
March889120
April515388
May22935290
June48120522
July13185637
August25137577
September13655374
October4406129
November786020
December1,13902

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 12.9 km from Huntertown. 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 USC00123207 (Garrett 1 S). Public domain.