Centerburg climate

Centerburg Frost Dates and Growing Season

NOAA 1991-2020 normals for Centerburg 2 Se, 3.8 km from Centerburg, elevation 1205 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Centerburg 2 Se. 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 27 and the first fall freeze around October 17, a growing season of about 172 days.

Median at 36°F
last May 6, first October 5
Median at 32°F
last April 27, first October 17
Median at 28°F
last April 15, first October 28

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 17May 13May 9May 6May 3Apr 30Apr 27Apr 22
32°FMay 13May 7May 3Apr 30Apr 27Apr 23Apr 20Apr 17Apr 13
28°FApr 30Apr 23Apr 20Apr 17Apr 15Apr 12Apr 9Apr 6Apr 2
24°FApr 18Apr 13Apr 9Apr 5Apr 3Apr 1Mar 30Mar 26Mar 21
20°FApr 8Apr 2Mar 31Mar 28Mar 25Mar 22Mar 19Mar 15Mar 10
16°FMar 31Mar 27Mar 23Mar 20Mar 17Mar 13Mar 10Mar 6Feb 28

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 23Sep 27Sep 30Oct 3Oct 5Oct 7Oct 10Oct 13Oct 17
32°FOct 5Oct 8Oct 11Oct 14Oct 17Oct 19Oct 22Oct 25Oct 30
28°FOct 14Oct 19Oct 22Oct 25Oct 28Oct 31Nov 2Nov 5Nov 10
24°FOct 26Oct 31Nov 2Nov 5Nov 8Nov 11Nov 13Nov 17Nov 24
20°FNov 5Nov 8Nov 12Nov 15Nov 18Nov 22Nov 27Dec 1Dec 6
16°FNov 12Nov 18Nov 22Nov 27Dec 1Dec 3Dec 7Dec 12Dec 20

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°F170164160155152147144138131
32°F190185180176172168165159151
28°F214207203198194190186182175
24°F238231225221218214211206199
20°F261253247243238233229224217
16°F283275268263258253248243234

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
6,138
Cooling degree days, base 65°F
691
Growing degree days, base 40°F
5,166
Growing degree days, base 45°F
4,001
Growing degree days, base 50°F
2,967
Growing degree days, base 55°F
2,068
Growing degree days, base 60°F
1,303

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,23402
February1,03903
March853129
April4577124
May19650334
June35152567
July5224684
August13180632
September10869414
October4088146
November732029
December1,05905

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 3.8 km from Centerburg. 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 USC00331404 (Centerburg 2 Se). Public domain.