Annual Degree Days

Yearly Comparisons:

2007

Month Heating Degree Days Average Cooling Degree Days Average Heating Degree Days Actual % Diff. from Average % Diff. from Last Yr. Cooling Degree Days Actual % Diff. From Average % Diff. From Last Yr. Heating 12-Month Ended Total Cooling 12-Month Ended Total
JAN 1314 0 1198 -8.8% 36.1% 0 #N/A #N/A 6,790 933
FEB 1061 0 1221 15.1% 13.5% 0 #N/A #N/A 6,935 933
MAR 925 0 636 -31.2% -35.8% 0 #N/A #N/A 6,581 933
APR 595 2 627 5.4% 41.2% 1 -50.0% 0.0% 6,764 933
MAY 313 13 198 -36.7% -23.3% 33 153.8% -19.5% 6,704 925
JUN 88 86 32 -63.6% 300.0% 170 97.7% 0.6% 6,728 926
JUL 16 227 0 -100.0% #N/A 464 104.4% 2.7% 6,728 938
AUG 21 263 25 19.0% 56.3% 263 0.0% 12.4% 6,737 967
SEP 175 58 146 -16.6% -37.6% 103 77.6% 243.3% 6,649 1040
OCT 486 0 429 -11.7% -30.7% 0 #N/A -100.0% 6,459 1034
NOV 889 0 797 -10.3% -5.9% 0 #N/A #N/A 6,409 1034
DEC 0 0 0 #N/A -100.0% 0 #N/A #N/A - -
TOTAL 5883 649 5309 - - 1034 - - - -

Designing a correctly sized heating or cooling system for a home, or determining the proper amount of insulation requires having some idea of the local weather severity. One measure of weather severity commonly used is degree days. Degree days are the sum of the daily temperature variances from a 65° F base temperature, for an entire heating or cooling season. Heating degree days are accrued whenever the average outside temperature is below 65° F. Cooling degree days are accrued on days when the average outside temperature is over 65° F.

2006

Month Heating Degree Days Average Cooling Degree Days Average Heating Degree Days Actual % Diff. from Average % Diff. from Last Yr. Cooling Degree Days Actual % Diff. From Average % Diff. From Last Yr. Heating 12-Month Ended Total Cooling 12-Month Ended Total
JAN 1314 0 880 -33.0% -32.4% 0 #N/A #N/A 6,066 830
FEB 1061 0 1076 1.4% 20.2% 0 #N/A #N/A 6,247 830
MAR 925 0 990 7.0% 24.8% 0 #N/A #N/A 6,444 830
APR 595 2 444 -25.4% -12.9% 1  -50.0% -87.5% 6,378 823
MAY 313 13 258 -17.6% -27.1% 41 215.4% 272.7% 6,282 853
JUN 88 86 8 -90.9% -88.4% 169 96.5% 31.0% 6,221 893
JUL 16 227 0 -100.0% -100.0% 452 99.1%  27.0% 6,213 989
AUG 21 208 16 -23.8% 6.7% 234 12.5% 14.7% 6,214 1019
SEP 190 59 234 23.2% 141.2% 28 -52.5%  -75.2%  6,351 934
OCT 521 3 619 18.8% 32.3% 6 100.0%  -33.3%  6,502 931
NOV 934 0 847 -9.3% 12.0% 0 #N/A #N/A 6,303 931
DEC 1233 0 1100 -10.8% -11.0% 0 #N/A #N/A 6,472 931
TOTAL 7211 598 6472     931        

Designing a correctly sized heating or cooling system for a home, or determining the proper amount of insulation requires having some idea of the local weather severity. One measure of weather severity commonly used is degree days. Degree days are the sum of the daily temperature variances from a 65° F base temperature, for an entire heating or cooling season. Heating degree days are accrued whenever the average outside temperature is below 65° F. Cooling degree days are accrued on days when the average outside temperature is over 65° F.

2005

Month Heating Degree Days Average Cooling Degree Days Average Heating Degree Days Actual % Diff. from Average % Diff. from Last Yr. Cooling Degree Days Actual % Diff. From Average % Diff. From Last Yr. Heating 12-Month Ended Total Cooling 12-Month Ended Total
JAN 1314 0 1302 -0.9% 0.4% 0 #N/A #N/A 6,558 522
FEB 1061 0 895 -15.6% -15.0% 0 #N/A #N/A 6,400 522
MAR 925 0 793 -14.3% 4.6% 0 #N/A #N/A 6,435 522
APR 595 2 510 -14.3% 0.8% 8 300.0% #N/A 6,439 530
MAY 313 13 354 13.1% 18.8% 11 -15.4% -35.3% 6,495 524
JUN 88 86 69 -21.6% -49.3% 129 50.0% 207.1% 6,428 611
JUL 16 227  8  -50.0%  -52.9%  356  56.8%  44.7% 6,419   721
AUG 21 208  15 -28.6%   -66.7%  204 -1.9% 37.8% 6,389  777
SEP 190 59 97   -48.9%  -28.7% 113  91.5%  63.8%  6,350 821 
OCT 521 3 468   -10.2% 3.1%  9  200.0%  #N/A  6,364 830 
NOV 934 0 758 -18.8% -7.8% 0 #N/A #N/A 6,300 830
DEC 1233 0 1219 -1.1% 18.2% 0 #N/A #N/A 6,488 830
TOTAL 7211 598 6488     830        

2004

Month Heating Degree Days Average Cooling Degree Days Average Heating Degree Days Actual % Diff. from Average % Diff. from Last Yr. Cooling Degree Days Actual % Diff. From Average % Diff. From Last Yr. Heating 12-Month Ended Total Cooling 12-Month Ended Total
JAN 1314 0 1297 -1.3% 8.3% 0 #N/A #N/A 7,164 891
FEB 1061 0 1053 -0.8% -13.1% 0 #N/A #N/A 7,005 891
MAR 925 0 758 -18.1% -18.0% 0 #N/A #N/A 6,839 891
APR  595  2  506  -15.0%  0.2%  0  -100.0%  #N/A  6,840  891
MAY 313 13  298 -4.8%  -7.2%  17   30.8% -15.0%   6,817  888
JUN 88 86 136 54.5% 1.5% 42 -51.2% -22.2% 6,819 876
JUL 16 227 17 6.3% #N/A 246 8.4% -35.4% 6,836 741
AUG 21 208 45 114.3% 164.7% 148 -28.8% -59.3% 6,864 525
SEP 190 59 136 -28.4% -38.2% 69 16.9% 6.2% 6,780 529
OCT 521 3 454 -12.9% 17.9% 0 -100.0% -100.0% 6,849 522
NOV 934 0 822 -12.0% -24.3% 0 #N/A #N/A 6,585 522
DEC 1233 0                
TOTAL 7211 598 5522     522        

2003

Month Heating Degree Days Average Cooling Degree Days Average Heating Degree Days Actual % Diff. from Average % Diff. from Last Yr. Cooling Degree Days Actual % Diff. From Average % Diff. From Last Yr. Heating 12-Month Ended Total Cooling 12-Month Ended Total
JAN 1314 0 1198 -8.8% 4.3% 0 #N/A #N/A 7,085 936
FEB 1061 0 1212 14.2% 27.2% 0 #N/A #N/A 7,344 936
MAR 925 0 924 -0.1% -29.8% 0 #N/A #N/A 6,952 936
APR 595 2 505 -15.1% 46.0% 0 -100.0% #N/A 7,111 936
MAY 313 13 321 2.6% -23.0% 20 53.8% 33.3% 7,015 941
JUN 88 86 134 52.3% 204.5% 54 -37.2% -72.0% 7,105 802
JUL 16 227 0 -100.0% #N/A 381 67.8% -6.8% 7,105 774
AUG 21 208 17  -19.0%  0.0%  364  75.0%  68.5%  7,105  922 
SEP 190 59 220  15.8%  16.4%  65  10.2%   -36.9% 7,136  884
OCT 521 3 385  -26.1%  -51.7%  7   133.3%  #N/A  6,724 891 
NOV 934 0 1086  16.3%   32.9% 0   #N/A #N/A  6,993  891 
DEC 1233 0 1063  -13.8%   7.3% 0   #N/A #N/A   7,065 891 
TOTAL 7211 598 7065     891        


2002

Month Heating Degree Days Average Cooling Degree Days Average Heating Degree Days Actual % Diff. from Average % Diff. from Last Yr. Cooling Degree Days Actual % Diff. From Average % Diff. From Last Yr. Heating 12-Month Ended Total Cooling 12-Month Ended Total
JAN 1324 0 1149 -13.2% 5.8% 0 #N/A #N/A 6,935 821
FEB 1072 0 953 -11.1% -28.6% 0 #N/A #N/A 6,554 821
MAR 958 0 1316 37.4% 39.4% 0 #N/A #N/A 6,926 821
APR 597 0 346 -42.0% -38.8% 0 #N/A -100.0% 6,707 817
MAY 311 7 417 34.1% 50.0% 15 114.3% 36.4% 6,846 821
JUN 103 97 44 -57.3% -65.4% 193 99.0% 80.4% 6,763 907
JUL 18 241 0 -100.0% -100.0% 409 69.7% 27.8% 6,754 996
AUG 31 205 17 -45.2% #N/A 216 5.4% -28.0% 6,771 912
SEP 211 61 189 -10.4% 26.8% 103 68.9% 32.1% 6,811 937
OCT 505 0 797 57.8% 52.4% 0 #N/A -100.0% 7,085 936
NOV 906 0 817 -9.8% 9.5% 0 #N/A #N/A 7,156 936
DEC 1265 0 991 -21.7% -10.8% 0 #N/A #N/A 7,036 936
TOTAL 7301 611 7036     936        


2001

Month Heating Degree Days Average Cooling Degree Days Average Heating Degree Days Actual % Diff. from Average % Diff. from Last Yr. Cooling Degree Days Actual % Diff. From Average % Diff. From Last Yr. Heating 12-Month Ended Total Cooling 12-Month Ended Total
JAN 1324 0 1086 -18.0% -9.2% 0 #N/A #N/A 7,129 766
FEB 1072 0 1334 24.4% 46.0% 0 #N/A #N/A 7,549 766
MAR 958 0 944 -1.5% 16.8% 0 #N/A #N/A 7,685 766
APR 597 0 565 -5.4% -13.3% 4 #N/A #N/A 7,598 770
MAY 311 7 278 -10.6% -1.1% 11 57.1% 10.0% 7,595 771
JUN 103 97 127 23.3% -8.6% 107 10.3% 59.7% 7,583 811
JUL 18 241 9 -50.0% -10.0% 320 32.8% 13.5% 7,582 849
AUG 31 205 0 -100.0% -100.0% 300 46.3% 0.3% 7,581 850
SEP 211 61 149 -29.4% -2.0% 78 27.9% -27.8% 7,578 820
OCT 505 0 523 3.6% 13.2% 1 #N/A #N/A 7,639 821
NOV 906 0 746 -17.7% -34.2% 0 #N/A #N/A 7,251 821
DEC 1265 0 1111 -12.2% -25.4% 0 #N/A #N/A 8,362 821
TOTAL 7301 611                


2000

Month Heating Degree Days Average Cooling Degree Days Average Heating Degree Days Actual % Diff. from Average % Diff. from Last Yr. Cooling Degree Days Actual % Diff. From Average % Diff. From Last Yr. Heating 12-Month Ended Total Cooling 12-Month Ended Total
JAN 1324 0 1196 -9.7% -1.5% 0 #N/A #N/A 6,364 488
FEB 1072 0 914 -14.7% 15.7% 0 #N/A #N/A 6,488 488
MAR 958 0 808 -15.7% -8.7% 0 #N/A #N/A 6,411 488
APR 597 0 652 9.2% -2.1% 0 #N/A #N/A 6,397 488
MAY 311 7 281 -9.6% -23.2% 10 42.9% 400.0% 6,312 496
JUN 103 97 139 35.0% 33.7% 67 -30.9% 67.5% 6,347 523
JUL 18 241 10 -44.4% -54.5% 282 17.0% 25.3% 6,335 580
AUG 31 205 1