Brandenburg climate

Brandenburg Frost Dates and Growing Season

NOAA 1991-2020 normals for Brandenburg, 6.7 km from Brandenburg, elevation 615 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Brandenburg. 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 19 and the first fall freeze around October 24, a growing season of about 186 days.

Median at 36°F
last April 29, first October 14
Median at 32°F
last April 19, first October 24
Median at 28°F
last April 6, first November 2

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 13May 7May 4May 1Apr 29Apr 26Apr 23Apr 19Apr 15
32°FMay 2Apr 29Apr 25Apr 22Apr 19Apr 16Apr 12Apr 9Apr 4
28°FApr 23Apr 17Apr 13Apr 9Apr 6Apr 3Mar 31Mar 27Mar 21
24°FApr 12Apr 5Apr 2Mar 30Mar 27Mar 23Mar 19Mar 15Mar 7
20°FApr 2Mar 27Mar 22Mar 18Mar 14Mar 9Mar 5Feb 28Feb 23
16°FMar 20Mar 15Mar 10Mar 5Mar 1Feb 26Feb 20Feb 14Feb 7

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

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°F185179174170166162158154147
32°F209202196191186183178174167
28°F231225219214211206202195188
24°F256249242237233227223216209
20°F281272265260256252246239230
16°F307298291286279274269263254

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
4,672
Cooling degree days, base 65°F
1,139
Growing degree days, base 40°F
6,372
Growing degree days, base 45°F
5,037
Growing degree days, base 50°F
3,851
Growing degree days, base 55°F
2,807
Growing degree days, base 60°F
1,899

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January997011
February804019
March631368
April30423224
May10388452
June10223663
July1334798
August2299763
September52143542
October28425241
November603158
December884013

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 6.7 km from Brandenburg. 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 USC00150955 (Brandenburg). Public domain.