Warrington climate

Warrington Frost Dates and Growing Season

NOAA 1991-2020 normals for Pensacola Forest Sherman Nas, 5.5 km from Warrington, elevation 28 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Pensacola Forest Sherman Nas. 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 28 and the first fall freeze around November 29, a growing season of about 277 days.

Median at 36°F
last March 13, first November 15
Median at 32°F
last February 28, first November 29
Median at 28°F
last February 6, first December 21

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 2Mar 27Mar 21Mar 17Mar 13Mar 9Mar 4Feb 27Feb 21
32°FMar 20Mar 14Mar 9Mar 4Feb 28Feb 22Feb 16Feb 9Jan 31
28°FMar 9Feb 28Feb 21Feb 13Feb 6Feb 1Jan 27Jan 18Jan 2
24°FFeb 23Feb 10Feb 2Jan 30Jan 25Jan 17Jan 9Jan 2Dec 25
20°FFeb 12Feb 2Jan 28Jan 22Jan 15Jan 10Jan 5Jan 1Dec 26
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°FOct 30Nov 4Nov 8Nov 12Nov 15Nov 18Nov 23Nov 28Dec 5
32°FNov 8Nov 14Nov 19Nov 24Nov 29Dec 3Dec 8Dec 19Jan 2
28°FNov 17Nov 27Dec 3Dec 10Dec 21Dec 30Jan 3Jan 10Jan 22
24°FDec 2Dec 14Dec 26Jan 1Jan 4Jan 10Jan 16Jan 24Feb 3
20°FDec 21Dec 29Jan 1Jan 5Jan 10Jan 14Jan 20Jan 29Feb 6
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°F275266258253248242237230222
32°F313301292285277270263256246
28°F351338330322314306297289273
24°F365365365356344337330320306
20°F365365365365365365365353334
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
95% of years
24°F or colder
70% of years
20°F or colder
29% of years
16°F or colder
5% 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
1,564
Cooling degree days, base 65°F
2,489
Growing degree days, base 40°F
10,072
Growing degree days, base 45°F
8,302
Growing degree days, base 50°F
6,619
Growing degree days, base 55°F
5,066
Growing degree days, base 60°F
3,684

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January4196141
February2978171
March19031318
April6292481
May7273732
June0436886
July0515980
August0502967
September1392841
October41179604
November20043309
December34613189

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 5.5 km from Warrington. 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 USW00003855 (Pensacola Forest Sherman Nas). Public domain.