Port Orange climate

Port Orange Frost Dates and Growing Season

NOAA 1991-2020 normals for Daytona Beach, 6.6 km from Port Orange, elevation 29 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Daytona Beach. 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 3 and the first fall freeze around January 9, a growing season of about 333 days.

Median at 36°F
last February 16, first December 29
Median at 32°F
last February 3, first January 9
Median at 28°F
last January 28, first January 18

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°FMar 12Mar 3Feb 26Feb 21Feb 16Feb 9Feb 3Jan 30Jan 18
32°FFeb 28Feb 21Feb 15Feb 8Feb 3Jan 31Jan 24Jan 14Jan 4
28°FFeb 20Feb 13Feb 6Feb 1Jan 28Jan 21Jan 14Jan 8Dec 30
24°FFeb 16Feb 6Feb 1Jan 28Jan 17Jan 10Jan 2Dec 31Dec 23
20°F–––––––––
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°FDec 1Dec 6Dec 13Dec 22Dec 29Jan 3Jan 8Jan 15Jan 26
32°FDec 10Dec 23Dec 31Jan 4Jan 9Jan 15Jan 22Jan 30Feb 9
28°FDec 22Dec 30Jan 5Jan 11Jan 18Jan 24Jan 31Feb 6Feb 15
24°FDec 21Dec 26Jan 2Jan 8Jan 15Jan 25Jan 31Feb 5Feb 11
20°F–––––––––
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°F341331322314308303296288277
32°F365362350341333326318310303
28°F365365365365365356344334322
24°F365365365365365365365365355
20°F365365365365365365365365365
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
97% of years
32°F or colder
79% of years
28°F or colder
44% of years
24°F or colder
13% of years
20°F or colder
0% of years
16°F or colder
0% 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
694
Cooling degree days, base 65°F
3,232
Growing degree days, base 40°F
11,666
Growing degree days, base 45°F
9,851
Growing degree days, base 50°F
8,059
Growing degree days, base 55°F
6,329
Growing degree days, base 60°F
4,707

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January22233299
February15042320
March8492475
April17186620
May1343808
June0460910
July0530995
August05501,015
September0472922
October8321778
November55138533
December15964383

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 6.6 km from Port Orange. 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 USC00082150 (Daytona Beach). Public domain.