Kane County climate

Kane County Frost Dates and Growing Season

NOAA 1991-2020 normals for Paria RS, 20.1 km from Kane County, elevation 4426 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Paria RS. 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 19 and the first fall freeze around October 23, a growing season of about 186 days.

Median at 36°F
last May 2, first October 14
Median at 32°F
last April 19, first October 23
Median at 28°F
last April 3, first November 2

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 22May 15May 10May 5May 2Apr 30Apr 26Apr 23Apr 17
32°FMay 9May 1Apr 26Apr 23Apr 19Apr 15Apr 12Apr 7Apr 1
28°FApr 21Apr 15Apr 11Apr 7Apr 3Mar 31Mar 26Mar 22Mar 17
24°FApr 6Mar 31Mar 24Mar 20Mar 17Mar 13Mar 10Mar 6Mar 1
20°FMar 19Mar 13Mar 9Mar 5Mar 1Feb 26Feb 20Feb 13Feb 7
16°FMar 5Feb 27Feb 21Feb 15Feb 10Feb 5Feb 1Jan 28Jan 19

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 30Oct 4Oct 8Oct 11Oct 14Oct 16Oct 19Oct 23Oct 28
32°FOct 9Oct 14Oct 17Oct 20Oct 23Oct 26Oct 30Nov 2Nov 6
28°FOct 19Oct 23Oct 27Oct 30Nov 2Nov 5Nov 7Nov 10Nov 14
24°FOct 29Nov 2Nov 5Nov 9Nov 12Nov 14Nov 17Nov 19Nov 22
20°FNov 7Nov 12Nov 16Nov 19Nov 21Nov 23Nov 26Nov 30Dec 4
16°FNov 17Nov 22Nov 26Nov 29Dec 1Dec 4Dec 7Dec 10Dec 17

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°F184177171166161157152145135
32°F208201195190186182176170162
28°F232226221216212207202196188
24°F258251246241237231226220212
20°F289279274268264259254249241
16°F318310303298292287280273264

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
4,645
Cooling degree days, base 65°F
1,449
Growing degree days, base 40°F
6,504
Growing degree days, base 45°F
5,180
Growing degree days, base 50°F
4,026
Growing degree days, base 55°F
3,026
Growing degree days, base 60°F
2,172

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January96100
February71504
March558043
April3294165
May12075425
June12286725
July0485950
August1417882
September35170585
October27312229
November661018
December98101

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 20.1 km from Kane County. 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 USC00426640 (Paria RS). Public domain.