US Heating Degree-Days

Standard and industrial heating degree-days

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Degree-days are used to calculate heating energy consumption of buildings.

Heating degree-day figures come with a "base temperature", and provide a measure of how much (in degrees), and for how long (in days), the outside temperature was below that base temperature. In the US the standard base is 65oF.

For industrial buildings with temperatures maintained below 70oF, bases of 45oF and 55oF are used.

State City Base (oF)
45 55 65
Colorado Denver 1548 3440 5524
Grand Junction 1757 3433 5641
Pueblo 1499 3261 5462
Connecticut Meriden   734  
New Haven 1769 3237 5897
District of Columbia Washington 1041 2487 4224
Idaho Boise 1045 2814 5809
Lewiston 1034 2688 5542
Pocatello 2161 4140 7033
Illinois Cairo 749 2119 3821
Chicago 1969 3743 5882
Springfield 1677 3289 5429
Indiana Evansville 799 2335 4435
Indianapolis 1397 2829 5699
Iowa Davenport 2296 4142 6061
Des Moines 2440 4180 6588
Kansas Dodge City 1385 2962 4986
Topeka 1518 1811 5182
Wichita 1152 2587 4620
Kentucky Lexington   2557 4683
Louisville 1073 2294 4660
Maine Eastport 2956 5236 8246
Portland 2530 4572 7511
Maryland Baltimore 986 2491 4654
Massachusetts Boston 1787 3603 5634
Nantucket 1514 3419 5891
Michigan Alpena 3131 5499 8506
Detroit 2240 4089 6232
Escanaba 3699 5918 8481
Grand Haven 2405 3435 6915
Grand Rapids 2332 4177 6894
Houghton 4029 6112 8964
Lansing 2537 4444 6909
Sault Ste. Marie 4049 6575 9048
Minnesota Duluth 4419 6774 10000
Minneapolis 3309 5417 8382
Moorhead 4796 6572 9315
St. Paul 2497 5497 7804
Missouri Kansas City 1463 2980 4711
Saint Louis 1186 2745 4900
Springfield 982 2423 4900
Montana Havre 3736 5874 8182
Helena 2843 5071 8129
Kalispell 2874 5131 8191
Nebraska Lincoln 3023 3850 5864
North Platte 2291 4152 6684
Omaha 2284 3982 6612
Valentine 2833 4801 7425
Nevada Winnemucca 1670 3468 6761
New Hampshire Concord 2646 4640 7383
New Jersey Atlantic City 1123 2904 4812
New York Albany 2018 4302 6875
Binghamton 2073 4296 6451
Buffalo 2359 4316 7062
Ithaca 2412 4023 6719
New York 1412 3089 4871
Oswego 2274 4363 6975
Rochester 2341 4231 6748
North Dakota Bismarck 3831 6468 8851
Williston 4616 6399 9243
Ohio Cincinnati 1376 3003 4410
Cleveland 1525 3795 6351
Columbus 1600 3255 5660
Dayton 1487 3147 5622
Sandusky 1949 3425 5796
Toledo 1990 3757 6994
Oklahoma Oklahoma City 600 1835 3725
Oregon Baker 2321 4307  
Portland 373 1911 4109
Roseburg 272 1868 4491
Pennsylvania Erie 2337 3837 6451
Harrisburg 1565 3236 5251
Philadelphia 1122 2695 4486
Pittsburg 1377 3028 5053
Scranton 1938 3755 6254
Rhode Island Block Island 871 3388 5804
South Dakota Yankton 2898 6045 7144
Tennessee Chattanooga 242 1398 3384
Knoxville 431 1741 3494
Memphis 166 1284 3015
Nashville 419 1678 3578
Utah Modena 1978 3981 6635
Salt lake City 1475 3202 6052
Vermont Burlington 3014 4984 8269
Northfield 3652 7121 8719
Virginia Lynchburg 554 1928 4166
Norfolk 260 1496 3421
Richmond 549 1895 3965
Washington North Head 184 2062 5211
Seattle 408 2185 4424
Spokane 1741 3672 6655
West Virginia Elkins 1506 3327 5675
Parkersburg 1147 2784 4754
Wisconsin Green Bay 3318 5331 8029
La Crosse 3034 3992 7589
Madison 3067 4850 7863
Milwaukee 2657 4617 7635
Wyoming Cheyenne 2500 4700 7381
Lander 3208 5450 7870

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