Newburg climate

Newburg Frost Dates and Growing Season

NOAA 1991-2020 normals for West Bend, 7.8 km from Newburg, elevation 940 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for West Bend. 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 4 and the first fall freeze around October 11, a growing season of about 157 days.

Median at 36°F
last May 18, first October 2
Median at 32°F
last May 4, first October 11
Median at 28°F
last April 22, first October 24

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 2May 29May 25May 21May 18May 14May 10May 6Apr 30
32°FMay 21May 17May 12May 8May 4May 1Apr 28Apr 25Apr 20
28°FMay 9May 1Apr 28Apr 25Apr 22Apr 19Apr 16Apr 12Apr 7
24°FApr 23Apr 18Apr 15Apr 11Apr 8Apr 5Apr 3Mar 31Mar 25
20°FApr 12Apr 7Apr 3Apr 1Mar 29Mar 26Mar 22Mar 19Mar 15
16°FApr 3Mar 30Mar 27Mar 23Mar 20Mar 18Mar 14Mar 11Mar 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 18Sep 23Sep 26Sep 30Oct 2Oct 4Oct 7Oct 9Oct 13
32°FSep 26Oct 1Oct 5Oct 8Oct 11Oct 14Oct 17Oct 20Oct 25
28°FOct 6Oct 13Oct 17Oct 21Oct 24Oct 27Oct 30Nov 1Nov 5
24°FOct 21Oct 26Oct 30Nov 1Nov 3Nov 5Nov 9Nov 12Nov 17
20°FOct 31Nov 3Nov 6Nov 9Nov 12Nov 16Nov 19Nov 22Nov 26
16°FNov 6Nov 11Nov 15Nov 18Nov 21Nov 24Nov 26Dec 1Dec 8

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°F155148143140135131128123116
32°F176170165161157152148144136
28°F202195190186182178173167159
24°F226220216211208204200195189
20°F247240235231227223219214209
16°F266259254249245241236231225

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
7,277
Cooling degree days, base 65°F
489
Growing degree days, base 40°F
4,340
Growing degree days, base 45°F
3,311
Growing degree days, base 50°F
2,408
Growing degree days, base 55°F
1,631
Growing degree days, base 60°F
984

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,37500
February1,15800
March99109
April627246
May31822209
June7898471
July12177629
August32133566
September14252365
October4836105
November85808
December1,20301

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 7.8 km from Newburg. 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 USC00479050 (West Bend). Public domain.