Degree Days Seasonal Summary (18°C Base)

Data last updated 12/12/2017 3:00 PM.
Southern Hemisphere Meterological Seasons
Summer: December, January, February
Fall: March, April, May
Winter: June, July, August
Spring: September, October, November

  
DateHeating Degree Days
SummerFallWinterSpringYear
Dec 2017 / Nov 201816.0* 303.3 less than the Summer average.---------16.0* 2608.3 less than the yearly average.
Dec 2016 / Nov 2017426.3* 107 more than the Summer average.692.6* 30.9 more than the Fall average.1082.8* 105.4 more than the Winter average.609.5* 56.4 less than the Spring average.2811.2* 186.9 more than the yearly average.
Dec 2015 / Nov 2016360.8* 41.5 more than the Summer average.576.7* 85 less than the Fall average.1015.1* 37.7 more than the Winter average.621.0* 44.9 less than the Spring average.2573.6* 50.7 less than the yearly average.
Dec 2014 / Nov 2015197.1* 122.2 less than the Summer average.694.2 32.5 more than the Fall average.1083.5* 106.1 more than the Winter average.713.6* 47.7 more than the Spring average.2688.4* 64.1 more than the yearly average.
Dec 2013 / Nov 2014374.1* 54.8 more than the Summer average.719.9* 58.2 more than the Fall average.920.0* 57.4 less than the Winter average.799.1 133.2 more than the Spring average.2813.1* 188.8 more than the yearly average.
Dec 2012 / Nov 2013277.8* 41.5 less than the Summer average.617.1 44.6 less than the Fall average.925.3* 52.1 less than the Winter average.634.8 31.1 less than the Spring average.2455.0* 169.3 less than the yearly average.
Dec 2011 / Nov 2012277.7 41.6 less than the Summer average.652.4* 9.3 less than the Fall average.1067.2* 89.8 more than the Winter average.719.5 53.6 more than the Spring average.2716.8* 92.5 more than the yearly average.
Dec 2010 / Nov 2011542.2* 222.9 more than the Summer average.695.4* 33.7 more than the Fall average.752.8* 224.6 less than the Winter average.608.3* 57.6 less than the Spring average.2598.7* 25.6 less than the yearly average.
Dec 2009 / Nov 2010354.2 34.9 more than the Summer average.640.6 21.1 less than the Fall average.937.8 39.6 less than the Winter average.551.4 114.5 less than the Spring average.2484.0 140.3 less than the yearly average.
Dec 2008 / Nov 2009367.0* 47.7 more than the Summer average.666.1 4.4 more than the Fall average.1012.3 34.9 more than the Winter average.735.8 69.9 more than the Spring average.2781.2* 156.9 more than the yearly average.
 
Max542.2 719.9 1083.5 799.1 2813.1
Avg319.3 661.7 977.4 665.9 2624.3
Min16.0 576.7 752.8 551.4 16.0
 
 
DateCooling Degree Days
SummerFallWinterSpringYear
Dec 2017 / Nov 20185.2* 12.7 less than the Summer average.---------5.2* 17.2 less than the yearly average.
Dec 2016 / Nov 20171.9* 16 less than the Summer average.1.9* 0.4 less than the Fall average.0.0*  0.2* 2 less than the Spring average.4.0* 18.4 less than the yearly average.
Dec 2015 / Nov 201616.8* 1.1 less than the Summer average.2.9* 0.6 more than the Fall average.0.0*  0.7* 1.5 less than the Spring average.20.4* 2 less than the yearly average.
Dec 2014 / Nov 201521.1* 3.2 more than the Summer average.0.0 2.3 less than the Fall average.0.0*  3.5* 1.3 more than the Spring average.24.6* 2.2 more than the yearly average.
Dec 2013 / Nov 20145.6* 12.3 less than the Summer average.0.0* 2.3 less than the Fall average.0.0*  0.0 2.2 less than the Spring average.5.6* 16.8 less than the yearly average.
Dec 2012 / Nov 201330.7* 12.8 more than the Summer average.4.9 2.6 more than the Fall average.0.0*  0.3 1.9 less than the Spring average.35.9* 13.5 more than the yearly average.
Dec 2011 / Nov 201230.4 12.5 more than the Summer average.0.6* 1.7 less than the Fall average.0.0*  0.0 2.2 less than the Spring average.31.0* 8.6 more than the yearly average.
Dec 2010 / Nov 201119.8* 1.9 more than the Summer average.3.2* 0.9 more than the Fall average.0.0*  1.9* 0.3 less than the Spring average.24.9* 2.5 more than the yearly average.
Dec 2009 / Nov 201018.3 0.4 more than the Summer average.1.3 1 less than the Fall average.0.0  13.4 11.2 more than the Spring average.33.0 10.6 more than the yearly average.
Dec 2008 / Nov 200929.4* 11.5 more than the Summer average.5.5 3.2 more than the Fall average.0.0  0.2 2 less than the Spring average.35.1* 12.7 more than the yearly average.
 
Max30.7 5.5 0.0 13.4 35.9
Avg17.9 2.3 0.0 2.2 22.4
Min1.9 0.0 0.0 0.0 4.0
 
Color Key
< 300 300 - 600 600 - 900 900 - 1200 1200 - 1500 1500 - 1800 1800 - 2100 2100 - 2400 2400 - 2700 2700 - 3000 3000 - 3300 3300 - 36003600>
* denotes incomplete data for the month/year.

A Degree Day is a unit of measurement equal to a difference of one degree between the mean outdoor temperature and a reference temperature (18°C). Degree Days are used in estimating the energy needs for heating or cooling a building.

Script Developed by Murry Conarroe of Wildwood Weather.