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Degree Days Seasonal Summary (18 Base)

Note: Data is updated after midnight each day.
Northern Hemisphere Meterological Seasons
Winter: December, January, February
Spring: March, April, May
Summer: June, July, August
Fall: September, October, November

 Daily DetailMonthly SummarySeasonal Summary 
DateHeating Degree Days
WinterSpringSummerFallYear
Dec 2025 / Nov 2026---102.6* 105.4 less than the Spring average.153.9* 137.6 more than the Summer average.7.8* 75 less than the Fall average.264.3* 668.9 less than the yearly average.
Dec 2018 / Nov 2019676.3 50.2 more than the Winter average.283.2 75.2 more than the Spring average.1.5* 14.8 less than the Summer average.---961.0* 27.8 more than the yearly average.
Dec 2017 / Nov 2018639.2 13.1 more than the Winter average.227.5 19.5 more than the Spring average.0.0 16.3 less than the Summer average.91.8 9 more than the Fall average.958.5 25.3 more than the yearly average.
Dec 2016 / Nov 2017669.0 42.9 more than the Winter average.211.9 3.9 more than the Spring average.0.0 16.3 less than the Summer average.134.9 52.1 more than the Fall average.1015.8 82.6 more than the yearly average.
Dec 2015 / Nov 2016471.6* 154.5 less than the Winter average.222.1 14.1 more than the Spring average.0.4 15.9 less than the Summer average.113.5* 30.7 more than the Fall average.807.6* 125.6 less than the yearly average.
Dec 2014 / Nov 2015635.1 9 more than the Winter average.270.1 62.1 more than the Spring average.0.0* 16.3 less than the Summer average.115.6 32.8 more than the Fall average.1020.8* 87.6 more than the yearly average.
Dec 2013 / Nov 2014500.8 125.3 less than the Winter average.270.1 62.1 more than the Spring average.1.3 15 less than the Summer average.67.9 14.9 less than the Fall average.840.1 93.1 less than the yearly average.
Dec 2012 / Nov 2013695.9 69.8 more than the Winter average.247.5* 39.5 more than the Spring average.6.0 10.3 less than the Summer average.105.1 22.3 more than the Fall average.1054.5* 121.3 more than the yearly average.
Dec 2011 / Nov 2012720.6 94.5 more than the Winter average.244.6 36.6 more than the Spring average.0.0 16.3 less than the Summer average.76.9 5.9 less than the Fall average.1042.1 108.9 more than the yearly average.
Dec 2010 / Nov 2011---0.0* 208 less than the Spring average.0.2 16.1 less than the Summer average.32.1* 50.7 less than the Fall average.32.3* 900.9 less than the yearly average.
 
Max720.6 283.2 153.9 134.9 1054.5
Avg626.1 208.0 16.3 82.8 933.2
Min471.6 0.0 0.0 7.8 32.3
 
 
DateCooling Degree Days
WinterSpringSummerFallYear
Dec 2025 / Nov 2026---48.0* 17.9 less than the Spring average.72.0* 538 less than the Summer average.6.5* 215.8 less than the Fall average.126.5* 772.3 less than the yearly average.
Dec 2018 / Nov 20190.2 0.4 less than the Winter average.21.9 44 less than the Spring average.512.3* 97.7 less than the Summer average.---534.4* 364.4 less than the yearly average.
Dec 2017 / Nov 20180.4 0.2 less than the Winter average.124.8 58.9 more than the Spring average.707.2 97.2 more than the Summer average.276.0 53.7 more than the Fall average.1108.4 209.6 more than the yearly average.
Dec 2016 / Nov 20170.0 0.6 less than the Winter average.93.0 27.1 more than the Spring average.762.4 152.4 more than the Summer average.162.1 60.2 less than the Fall average.1017.5 118.7 more than the yearly average.
Dec 2015 / Nov 20161.8* 1.2 more than the Winter average.75.6 9.7 more than the Spring average.651.5 41.5 more than the Summer average.306.3* 84 more than the Fall average.1035.2* 136.4 more than the yearly average.
Dec 2014 / Nov 20151.3 0.7 more than the Winter average.84.4 18.5 more than the Spring average.763.7* 153.7 more than the Summer average.225.4 3.1 more than the Fall average.1074.8* 176 more than the yearly average.
Dec 2013 / Nov 20141.2 0.6 more than the Winter average.46.8 19.1 less than the Spring average.595.0 15 less than the Summer average.265.1 42.8 more than the Fall average.908.1 9.3 more than the yearly average.
Dec 2012 / Nov 20130.0 0.6 less than the Winter average.75.3* 9.4 more than the Spring average.656.5 46.5 more than the Summer average.247.0 24.7 more than the Fall average.978.8* 80 more than the yearly average.
Dec 2011 / Nov 20120.0 0.6 less than the Winter average.60.1 5.8 less than the Spring average.769.6 159.6 more than the Summer average.260.9 38.6 more than the Fall average.1090.6 191.8 more than the yearly average.
Dec 2010 / Nov 2011---28.8* 37.1 less than the Spring average.610.1 0.1 more than the Summer average.251.1* 28.8 more than the Fall average.890.0* 8.8 less than the yearly average.
 
Max1.8 124.8 769.6 306.3 1108.4
Avg0.6 65.9 610.0 222.3 898.8
Min0.0 21.9 72.0 6.5 126.5
 
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). Degree Days are used in estimating the energy needs for heating or cooling a building.