Crivitz climate

Crivitz Frost Dates and Growing Season

NOAA 1991-2020 normals for Crivitz High Falls, 20 km from Crivitz, elevation 950 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Crivitz High Falls. 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 26 and the first fall freeze around September 22, a growing season of about 118 days.

Median at 36°F
last June 8, first September 11
Median at 32°F
last May 26, first September 22
Median at 28°F
last May 14, first October 3

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 30Jun 23Jun 16Jun 12Jun 8Jun 5Jun 1May 29May 24
32°FJun 11Jun 4Jun 1May 30May 26May 24May 21May 17May 11
28°FMay 28May 24May 21May 18May 14May 11May 8May 4Apr 30
24°FMay 17May 12May 8May 5May 2Apr 30Apr 28Apr 25Apr 20
20°FMay 6May 1Apr 29Apr 26Apr 24Apr 21Apr 17Apr 14Apr 10
16°FApr 26Apr 22Apr 18Apr 14Apr 12Apr 8Apr 6Apr 3Mar 29

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°FAug 26Sep 1Sep 4Sep 8Sep 11Sep 13Sep 16Sep 19Sep 24
32°FSep 6Sep 13Sep 17Sep 20Sep 22Sep 25Sep 28Oct 1Oct 5
28°FSep 19Sep 24Sep 28Oct 1Oct 3Oct 5Oct 8Oct 12Oct 16
24°FOct 1Oct 5Oct 9Oct 12Oct 14Oct 17Oct 20Oct 23Oct 29
20°FOct 14Oct 19Oct 23Oct 26Oct 30Nov 1Nov 3Nov 7Nov 13
16°FOct 28Nov 1Nov 3Nov 6Nov 10Nov 12Nov 15Nov 19Nov 23

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°F114107101969287827464
32°F13813212712311811511010497
28°F160153149145141138134129122
24°F183177172168163159155150143
20°F208202197193189184180175168
16°F232225220216211207203198192

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
8,876
Cooling degree days, base 65°F
286
Growing degree days, base 40°F
3,535
Growing degree days, base 45°F
2,627
Growing degree days, base 50°F
1,842
Growing degree days, base 55°F
1,179
Growing degree days, base 60°F
654

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,59600
February1,35800
March1,16602
April760121
May38514166
June12957382
July53110522
August7283476
September27220230
October649141
November1,02502
December1,41200

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 km from Crivitz. 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 USC00471897 (Crivitz High Falls). Public domain.