Peshtigo climate

Peshtigo Frost Dates and Growing Season

NOAA 1991-2020 normals for Peshtigo, 3.1 km from Peshtigo, elevation 600 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Peshtigo. 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 11 and the first fall freeze around October 5, a growing season of about 145 days.

Median at 36°F
last May 25, first September 24
Median at 32°F
last May 11, first October 5
Median at 28°F
last April 30, first October 17

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°FJun 7Jun 3May 31May 28May 25May 22May 19May 15May 10
32°FMay 26May 21May 18May 14May 11May 8May 5May 2Apr 29
28°FMay 13May 8May 4May 1Apr 30Apr 27Apr 24Apr 21Apr 17
24°FApr 30Apr 27Apr 24Apr 21Apr 19Apr 16Apr 14Apr 10Apr 6
20°FApr 22Apr 18Apr 15Apr 12Apr 9Apr 6Apr 4Apr 1Mar 28
16°FApr 14Apr 9Apr 5Apr 3Apr 1Mar 30Mar 26Mar 22Mar 17

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

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°F141134130125121117113108101
32°F165158154149145141137132126
28°F189183178173169165161156149
24°F215207203199195191188183176
20°F236229225221217213209204197
16°F255247242238235230226222216

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
8,068
Cooling degree days, base 65°F
348
Growing degree days, base 40°F
3,873
Growing degree days, base 45°F
2,902
Growing degree days, base 50°F
2,067
Growing degree days, base 55°F
1,353
Growing degree days, base 60°F
766

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,47700
February1,27200
March1,11605
April725017
May35311178
June9663419
July31140573
August4798516
September20635294
October561160
November90205
December1,28300

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 3.1 km from Peshtigo. 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 USC00476510 (Peshtigo). Public domain.