Burt County climate

Burt County Frost Dates and Growing Season

NOAA 1991-2020 normals for Tekamah, 11.6 km from Burt County, elevation 1140 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Tekamah. 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 28 and the first fall freeze around October 10, a growing season of about 165 days.

Median at 36°F
last May 6, first October 1
Median at 32°F
last April 28, first October 10
Median at 28°F
last April 18, first October 21

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

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°F165159155151148144140136130
32°F183177172168165162157153147
28°F203197192188184180176171165
24°F223215211207203199195190183
20°F242235229224220216212207200
16°F261253248243239235230224217

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
6,461
Cooling degree days, base 65°F
1,018
Growing degree days, base 40°F
5,506
Growing degree days, base 45°F
4,370
Growing degree days, base 50°F
3,350
Growing degree days, base 55°F
2,450
Growing degree days, base 60°F
1,670

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,34800
February1,09902
March841131
April4657118
May17167373
June18227658
July3331794
August7263721
September96108465
October40014169
November813020
December1,20001

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 11.6 km from Burt County. 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 USC00258480 (Tekamah). Public domain.