Correctionville climate

Correctionville Frost Dates and Growing Season

NOAA 1991-2020 normals for Holstein, 19.5 km from Correctionville, elevation 1370 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Holstein. 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 30 and the first fall freeze around October 9, a growing season of about 162 days.

Median at 36°F
last May 7, first September 30
Median at 32°F
last April 30, first October 9
Median at 28°F
last April 20, first October 20

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 19May 15May 12May 9May 7May 5May 2Apr 30Apr 26
32°FMay 11May 7May 4May 2Apr 30Apr 27Apr 24Apr 20Apr 15
28°FMay 2Apr 28Apr 25Apr 23Apr 20Apr 17Apr 14Apr 10Apr 6
24°FApr 23Apr 19Apr 16Apr 13Apr 10Apr 7Apr 4Apr 1Mar 28
20°FApr 16Apr 11Apr 8Apr 5Apr 2Mar 31Mar 28Mar 22Mar 15
16°FApr 8Apr 3Mar 31Mar 27Mar 23Mar 19Mar 15Mar 12Mar 6

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

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°F160155151147144141138134127
32°F180174169166162158154150145
28°F202195191186182178174169162
24°F221213208204200195191187180
20°F237231226221217213209204196
16°F255248242237233229224219212

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
7,287
Cooling degree days, base 65°F
690
Growing degree days, base 40°F
4,856
Growing degree days, base 45°F
3,791
Growing degree days, base 50°F
2,839
Growing degree days, base 55°F
1,997
Growing degree days, base 60°F
1,277

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,48300
February1,20800
March942124
April535387
May22245311
June25157582
July9233690
August17179628
September13564387
October4818122
November90809
December1,32300

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 19.5 km from Correctionville. 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 USC00133909 (Holstein). Public domain.