Floyd climate

Floyd Frost Dates and Growing Season

NOAA 1991-2020 normals for Floyd 2 Ne, 3.2 km from Floyd, elevation 2625 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Floyd 2 Ne. 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 30 and the first fall freeze around October 10, a growing season of about 159 days.

Median at 36°F
last May 11, first October 3
Median at 32°F
last April 30, first October 10
Median at 28°F
last April 20, first October 20

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 26May 21May 16May 13May 11May 7May 5May 2Apr 28
32°FMay 18May 12May 8May 4Apr 30Apr 28Apr 24Apr 21Apr 17
28°FMay 7Apr 30Apr 27Apr 23Apr 20Apr 17Apr 14Apr 10Apr 5
24°FApr 22Apr 17Apr 12Apr 9Apr 6Apr 3Mar 31Mar 28Mar 20
20°FApr 8Apr 3Mar 31Mar 28Mar 24Mar 19Mar 16Mar 11Mar 5
16°FMar 28Mar 22Mar 17Mar 12Mar 9Mar 4Feb 28Feb 24Feb 16

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 17Sep 23Sep 27Oct 1Oct 3Oct 5Oct 8Oct 10Oct 14
32°FSep 27Oct 2Oct 5Oct 8Oct 10Oct 13Oct 15Oct 18Oct 23
28°FOct 7Oct 12Oct 15Oct 17Oct 20Oct 23Oct 25Oct 28Nov 1
24°FOct 15Oct 21Oct 25Oct 28Oct 31Nov 2Nov 5Nov 9Nov 15
20°FOct 29Nov 2Nov 6Nov 9Nov 12Nov 16Nov 19Nov 25Dec 1
16°FNov 7Nov 14Nov 19Nov 24Nov 28Dec 1Dec 5Dec 12Dec 21

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°F161155151146143138133128121
32°F180174168163159155151147140
28°F202195190185181177173168161
24°F228220215210206202197192185
20°F259250244238233228222217210
16°F292282275268262258251245236

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
5,424
Cooling degree days, base 65°F
480
Growing degree days, base 40°F
5,031
Growing degree days, base 45°F
3,788
Growing degree days, base 50°F
2,712
Growing degree days, base 55°F
1,798
Growing degree days, base 60°F
1,050

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,01804
February85403
March727027
April4372112
May20022297
June4592496
July6181640
August15137587
September11445384
October4041126
November680032
December92406

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 3.2 km from Floyd. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00443071 (Floyd 2 Ne). Public domain.