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Tracking Heating & Cooling Load in St Clair County MI

Tracking Heating & Cooling Load

An important factor needed to analyze fuel consumption is the heating and cooling load due to outside temperature.

The unit of measure used is the Degree Day.  One heating degree-day is given for each degree that the daily mean temperature departs below the base of 65°F or 65°F - (the daily high temperature - the daily low temperature). 

For this chart Degree Days were calculated daily and totaled for the month.

Interpreting the data: High numbers indicate cold months. Low numbers indicate mild months. 

Negative numbers indicate hot summer months where the mean temperature is consistently above 65°F.

You will note that the annual trend between 2006 to 2007 colder, which requires more heating and less cooling.

2007 was 19% colder than 2006.  2008 was 8% colder than 2007. 

 

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

ANNUAL

2015

1443

1581.5

1105 627 209  62.5  -170   -155.5  -95 388.5  735.5     
2014

 1492

 1360  515  643 268  12  13.5 -35   188 469  915   1038 6878.5 
2013
1185

1112

 1022  653  230  5  -248 -116  93  371  1723  964  6992
2012

1124

991

581

1163

168

-26

-200

-61

182

462

819

945

6146

2011

1419

1182

1062

627

231

-30

-287

-135

85

432

656

977

6211

2010

1230

1093

792

469

204

-33

-190

-160

158

447
793

1382

6185

2009

1543

1090

940

571

326

114

31

-31

154

559

689

1144

7146

2008

1148

1261

1094

516

414

-46

-114

-33

117

574

832

1217

6978

2007

1178

1346

874

627

228

-29

-72

-91

112

286

849

1160

6467

2006

958

1038

906

475

181

-52

-268

-171

189

568

715

910

5448

2005

 

 

 

 

 

 

 

 

 

 

 

 1218

Incomplete

This chart only goes back to December, 2005 because that is when I started keeping track.  - Daniel Squires