Davis Park climate

Davis Park Frost Dates and Growing Season

NOAA 1991-2020 normals for Molloy Cercom, 8.3 km from Davis Park, elevation 5 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Molloy Cercom. 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 4 and the first fall freeze around November 11, a growing season of about 219 days.

Median at 36°F
last April 20, first October 30
Median at 32°F
last April 4, first November 11
Median at 28°F
last March 24, first November 24

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

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 15Oct 19Oct 23Oct 27Oct 30Nov 1Nov 4Nov 7Nov 13
32°FOct 27Oct 31Nov 3Nov 7Nov 11Nov 14Nov 18Nov 22Nov 29
28°FNov 6Nov 12Nov 16Nov 21Nov 24Nov 28Dec 2Dec 5Dec 12
24°FNov 18Nov 25Dec 1Dec 4Dec 7Dec 10Dec 14Dec 19Dec 26
20°FDec 2Dec 7Dec 12Dec 16Dec 21Dec 24Dec 28Jan 2Jan 10
16°FDec 13Dec 20Dec 26Dec 30Jan 2Jan 7Jan 12Jan 17Jan 26

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°F212205201196192187183177168
32°F241234228223219215210203197
28°F268260254250246241236230223
24°F290283276271267262257252244
20°F314306300294290285280274266
16°F338328322317311306301296286

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
98% 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
5,148
Cooling degree days, base 65°F
853
Growing degree days, base 40°F
5,533
Growing degree days, base 45°F
4,248
Growing degree days, base 50°F
3,151
Growing degree days, base 55°F
2,225
Growing degree days, base 60°F
1,464

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,00900
February88500
March78408
April467159
May2299248
June30129549
July0299764
August1302765
September50109509
October2825206
November564141
December84803

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 8.3 km from Davis Park. 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 USC00302151 (Molloy Cercom). Public domain.