Claypool climate

Claypool Frost Dates and Growing Season

NOAA 1991-2020 normals for Miami, 2.6 km from Claypool, elevation 3560 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 February 24 and the first fall freeze around December 1, a growing season of about 279 days.

Median at 36°F
last March 19, first November 19
Median at 32°F
last February 24, first December 1
Median at 28°F
last January 30, first December 13

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°FApr 11Apr 2Mar 28Mar 22Mar 19Mar 14Mar 10Mar 5Feb 25
32°FMar 18Mar 9Mar 5Mar 1Feb 24Feb 18Feb 13Feb 6Jan 30
28°FFeb 28Feb 18Feb 10Feb 3Jan 30Jan 20Jan 10Jan 3Dec 26
24°FFeb 8Jan 30Jan 22Jan 12Jan 5Jan 2Dec 30Dec 23Dec 14
20°FFeb 1Jan 25Jan 13Jan 6Jan 3Jan 2Dec 30Dec 23Dec 15
16°F–––––––––

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°FNov 2Nov 9Nov 13Nov 16Nov 19Nov 22Nov 25Nov 28Dec 3
32°FNov 15Nov 20Nov 24Nov 28Dec 1Dec 4Dec 7Dec 10Dec 15
28°FNov 26Dec 1Dec 6Dec 9Dec 13Dec 16Dec 20Dec 25Jan 1
24°FDec 7Dec 13Dec 17Dec 24Dec 28Jan 1Jan 6Jan 16Jan 31
20°FDec 15Dec 23Dec 29Jan 1Jan 2Jan 4Jan 11Jan 25Feb 1
16°F–––––––––

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°F268259253247242236231224214
32°F308298291285279273266258247
28°F352343334328321313305296283
24°F365365365365360354348337327
20°F365365365365365365365365363
16°F365365365365365365365365365

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
97% of years
24°F or colder
56% of years
20°F or colder
11% of years
16°F or colder
1% 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
2,053
Cooling degree days, base 65°F
2,758
Growing degree days, base 40°F
9,842
Growing degree days, base 45°F
8,083
Growing degree days, base 50°F
6,464
Growing degree days, base 55°F
5,041
Growing degree days, base 60°F
3,812

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January485063
February371095
March25714244
April11168411
May20259704
June1525973
July06451,110
August06081,073
September0446895
October42173598
November24321251
December522048

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 2.6 km from Claypool. 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 USC00025512 (Miami). Public domain.