Kouts climate

Kouts Frost Dates and Growing Season

NOAA 1991-2020 normals for Wanatah 2 Wnw, 16.3 km from Kouts, elevation 735 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Wanatah 2 Wnw. 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 29 and the first fall freeze around October 13, a growing season of about 166 days.

Median at 36°F
last May 9, first October 1
Median at 32°F
last April 29, first October 13
Median at 28°F
last April 17, first October 25

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 25May 20May 15May 12May 9May 6May 3Apr 30Apr 26
32°FMay 14May 9May 5May 1Apr 29Apr 26Apr 23Apr 19Apr 15
28°FMay 3Apr 28Apr 23Apr 20Apr 17Apr 14Apr 12Apr 8Apr 4
24°FApr 21Apr 17Apr 13Apr 9Apr 6Apr 4Apr 1Mar 29Mar 22
20°FApr 12Apr 7Apr 3Apr 1Mar 29Mar 24Mar 20Mar 16Mar 10
16°FApr 3Mar 29Mar 23Mar 19Mar 15Mar 12Mar 8Mar 4Feb 27

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 26Sep 28Oct 1Oct 3Oct 5Oct 8Oct 13
32°FOct 1Oct 5Oct 8Oct 10Oct 13Oct 16Oct 19Oct 23Oct 27
28°FOct 12Oct 16Oct 20Oct 22Oct 25Oct 28Nov 1Nov 3Nov 9
24°FOct 23Oct 30Nov 1Nov 4Nov 7Nov 10Nov 13Nov 18Nov 24
20°FNov 4Nov 8Nov 11Nov 15Nov 19Nov 23Nov 27Dec 1Dec 6
16°FNov 12Nov 19Nov 24Nov 27Dec 1Dec 3Dec 7Dec 12Dec 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°F163157153148144140136131124
32°F186179174171166162158153145
28°F211203198194189185180176169
24°F235226221217213209205199192
20°F263253247242237232227222214
16°F284275270264260254249241232

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
6,430
Cooling degree days, base 65°F
755
Growing degree days, base 40°F
5,059
Growing degree days, base 45°F
3,936
Growing degree days, base 50°F
2,944
Growing degree days, base 55°F
2,078
Growing degree days, base 60°F
1,345

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,28800
February1,06802
March872123
April514693
May21959327
June39180591
July10239694
August19182628
September11879415
October41410146
November758023
December1,11102

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 16.3 km from Kouts. 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 USC00129222 (Wanatah 2 Wnw). Public domain.