Fairland climate

Fairland Frost Dates and Growing Season

NOAA 1991-2020 normals for Miami, 15.1 km from Fairland, elevation 805 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Miami. 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 6 and the first fall freeze around October 27, a growing season of about 203 days.

Median at 36°F
last April 19, first October 19
Median at 32°F
last April 6, first October 27
Median at 28°F
last March 25, first November 5

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 5Apr 30Apr 27Apr 23Apr 19Apr 15Apr 11Apr 8Apr 2
32°FApr 26Apr 19Apr 13Apr 9Apr 6Apr 3Mar 31Mar 27Mar 20
28°FApr 10Apr 5Apr 1Mar 29Mar 25Mar 20Mar 16Mar 10Mar 3
24°FMar 31Mar 23Mar 18Mar 15Mar 11Mar 7Mar 3Feb 28Feb 22
20°FMar 17Mar 12Mar 7Mar 3Feb 28Feb 25Feb 21Feb 15Feb 7
16°FMar 10Mar 4Feb 28Feb 23Feb 18Feb 14Feb 7Feb 1Jan 26

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

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°F203197191185181177172166160
32°F227219213208203199194189180
28°F253244237232227222216210202
24°F278268262255250244238232221
20°F303293285277274268262255244
16°F331319311303297293285278268

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
3,961
Cooling degree days, base 65°F
1,690
Growing degree days, base 40°F
7,381
Growing degree days, base 45°F
5,947
Growing degree days, base 50°F
4,661
Growing degree days, base 55°F
3,519
Growing degree days, base 60°F
2,531

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January91409
February694129
March4878122
April22828275
May70124520
June3338786
July0476941
August0454919
September31220640
October21936304
November510596
December806021

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 15.1 km from Fairland. 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 USC00345855 (Miami). Public domain.