Pine Lakes climate

Pine Lakes Frost Dates and Growing Season

NOAA 1991-2020 normals for Deland 1 Sse, 14.9 km from Pine Lakes, elevation 25 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Deland 1 Sse. 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 17 and the first fall freeze around December 30, a growing season of about 310 days.

Median at 36°F
last March 8, first December 11
Median at 32°F
last February 17, first December 30
Median at 28°F
last January 31, first January 10

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 1Mar 26Mar 20Mar 14Mar 8Mar 3Feb 26Feb 17Feb 8
32°FMar 19Mar 8Feb 28Feb 23Feb 17Feb 11Feb 5Jan 29Jan 14
28°FMar 1Feb 20Feb 11Feb 5Jan 31Jan 26Jan 18Jan 9Dec 31
24°FFeb 12Feb 1Jan 30Jan 26Jan 21Jan 16Jan 8Jan 1Dec 26
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°FNov 20Nov 28Dec 2Dec 6Dec 11Dec 17Dec 24Dec 31Jan 8
32°FDec 2Dec 8Dec 15Dec 24Dec 30Jan 3Jan 9Jan 18Jan 31
28°FDec 14Dec 24Dec 30Jan 3Jan 10Jan 15Jan 22Jan 31Feb 10
24°FDec 20Dec 27Jan 1Jan 7Jan 15Jan 22Jan 26Jan 31Feb 8
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°F310300292285278271264256246
32°F349334325317310303294287275
28°F365365364353342334328317304
24°F365365365365365365365353336
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
100% of years
32°F or colder
96% of years
28°F or colder
71% of years
24°F or colder
28% of years
20°F or colder
3% 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
899
Cooling degree days, base 65°F
2,868
Growing degree days, base 40°F
11,097
Growing degree days, base 45°F
9,289
Growing degree days, base 50°F
7,517
Growing degree days, base 55°F
5,829
Growing degree days, base 60°F
4,263

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January27321247
February18134287
March11469424
April27152575
May2304767
June0445895
July0513978
August0513978
September0428878
October12260713
November8787452
December20341322

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 14.9 km from Pine Lakes. 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 USC00082229 (Deland 1 Sse). Public domain.