Monthly Heating Degree Day Records
The following table lists the monthly heating degree Day's at Brookhaven National Laboratory since 1949.
Year Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec  Total
1949 862.0 820.0 823.0 472.0 246.0 62.0 4.0 13.0 148.0 263.0 697.0 953.0 5363.0
1950 839.0 1012.0 988.0 648.0 358.0 95.0 11.0 29.0 195.0 349.0 647.0 1024.0 6195.0
1951 1014.0 929.0 845.0 524.0 259.0 99.0 6.0 27.0 129.0 370.0 726.0 927.0 5855.0
1952 1012.0 959.0 875.0 486.0 310.0 33.0 4.0 25.0 144.0 480.0 662.0 933.0 5923.0
1953 985.0 840.0 804.0 537.0 219.0 111.0 24.0 52.0 152.0 383.0 654.0 854.0 5615.0
1954 1194.0 850.0 859.0 526.0 351.0 61.0 16.0 23.0 149.0 348.0 738.0 1024.0 6139.0
1955 1148.0 979.0 863.0 492.0 230.0 98.0 2.0 37.0 160.0 332.0 748.0 1250.0 6339.0
1956 1146.0 940.0 985.0 688.0 398.0 92.0 30.0 44.0 221.0 438.0 695.0 894.0 6571.0
1957 1282.0 880.0 828.0 504.0 284.0 54.0 10.0 54.0 136.0 414.0 592.0 873.0 5911.0
1958 1092.0 1106.0 858.0 548.0 366.0 148.0 16.0 26.0 132.0 461.0 678.0 1263.0 6694.0
1959 1156.0 1046.0 907.0 536.0 258.0 120.0 6.0 18.0 130.0 371.0 670.0 938.0 6156.0
1960 1068.0 876.0 1056.0 527.0 239.0 60.0 4.0 22.0 176.0 464.0 620.0 1168.0 6280.0
1961 1292.0 995.0 884.0 608.0 338.0 60.0 7.0 26.0 68.0 236.0 668.0 1006.0 6188.0
1962 1091.0 981.0 862.0 578.0 307.0 62.0 44.0 44.0 218.0 448.0 773.0 1142.0 6550.0
1963 1147.0 1096.0 808.0 538.0 314.0 56.0 27.0 34.0 190.0 292.0 557.0 1168.0 6227.0
1964 1079.0 1090.0 840.0 636.0 222.0 77.0 10.0 74.0 158.0 442.0 666.0 930.0 6224.0
1965 1224.0 1006.0 907.0 636.0 216.0 98.0 20.0 40.0 142.0 439.0 729.0 954.0 6411.0
1966 1152.0 977.0 846.0 696.0 378.0 64.0 6.0 8.0 152.0 509.0 652.0 1048.0 6488.0
1967 994.0 1118.0 1020.0 624.0 460.0 60.0 7.0 18.0 174.0 478.0 800.0 1000.0 6753.0
1968 1264.0 1166.0 848.0 550.0 356.0 84.0 13.0 50.0 80.0 318.0 688.0 1092.0 6509.0
1969 1150.0 992.0 960.0 536.0 316.0 97.0 24.0 15.0 164.0 419.0 722.0 1058.0 6453.0
1970 1342.0 1016.0 944.0 560.0 250.0 49.0 0.0 4.0 115.0 360.0 616.0 1013.0 6269.0
1971 1260.0 956.0 868.0 660.0 342.0 68.0 15.0 36.0 74.0 214.0 714.0 866.0 6073.0
1972 1004.0 1058.0 899.0 661.0 262.0 68.0 8.0 43.0 89.0 549.0 775.0 916.0 6332.0
1973 1042.0 967.0 686.0 478.0 312.0 30.0 7.0 2.0 168.0 396.0 634.0 870.0 5592.0
1974 1014.0 1050.0 792.0 472.0 318.0 74.0 16.0 5.0 124.0 530.0 650.0 931.0 5976.0
1975 958.0 966.0 920.0 634.0 216.0 56.0 3.0 12.0 146.0 336.0 518.0 988.0 5753.0
1976 1283.0 873.0 822.0 472.0 286.0 72.0 4.0 19.0 146.0 486.0 820.0 1192.0 6475.0
1977 1414.0 996.0 716.0 540.0 231.0 87.0 12.0 27.0 96.0 448.0 638.0 1024.0 6229.0
1978 1207.0 1200.0 944.0 570.0 276.0 94.0 34.0 7.0 220.0 494.0 674.0 945.0 6665.0
1979 1108.0 1252.0 721.0 588.0 192.0 107.0 22.0 26.0 147.0 392.0 539.0 840.0 5934.0
1980 1089.0 1116.0 926.0 532.0 198.0 106.0 1.0 0.0 92.0 384.0 738.0 1114.0 6296.0
1981 1409.0 906.0 897.0 485.0 235.0 28.0 0.0 10.0 101.0 483.0 638.0 994.0 6186.0
1982 1323.0 950.0 902.0 601.0 206.0 102.0 13.0 26.0 147.0 410.0 562.0 799.0 6041.0
1983 1024.0 919.0 743.0 521.0 334.0 48.0 2.0 14.0 124.0 385.0 602.0 1038.0 5754.0
1984 1247.0 809.0 983.0 536.0 309.0 62.0 7.0 3.0 185.0 301.0 664.0 803.0 5909.0
1985 1258.0 945.0 760.0 457.0 268.0 94.0 5.0 14.0 141.0 374.0 551.0 1074.0 5941.0
1986 1084.0 1031.0 808.0 528.0 229.0 76.0 16.0 44.0 147.0 395.0 710.0 918.0 5986.0
1987 1108.0 1000.0 780.0 468.0 269.0 34.0 6.0 43.0 103.0 495.0 628.0 941.0 5875.0
1988 1258.0 995.0 847.0 582.0 249.0 90.0 10.0 21.0 141.0 537.0 639.0 1035.0 6404.0
1989 1000.0 976.0 863.0 576.0 235.0 18.0 0.0 18.0 127.0 357.0 688.0 1273.0 6131.0
1990 860.0 835.0 777.0 545.0 288.0 43.0 9.0 4.0 134.0 279.0 581.0 794.0 5149.0
1991 1055.0 826.0 720.0 427.0 168.0 29.0 3.0 3.0 152.0 329.0 609.0 877.0 5198.0
1992 1051.0 932.0 897.0 600.0 296.0 52.0 18.4 18.6 121.9 456.0 671.5 934.8 6049.2
1993 986.0 1071.0 945.0 503.0 187.0 56.0 2.0 1.0 127.0 440.0 679.0 958.0 5955.0
1994 1249.0 1051.0 853.0 453.0 276.0 35.0 0.0 27.0 93.0 387.0 505.0 817.0 5746.0
1995 881.6 990.2 749.7 556.2 282.2 38.3 0.1 4.3 123.8 260.2 715.4 1083.8 5685.8
1996 1110.0 980.6 948.3 523.0 298.2 39.5 0.4 4.0 103.5 399.9 758.5 825.0 5990.9
1997 1090.0 798.6 846.0 542.0 320.8 100.3 5.8 6.3 107.0 412.2 711.0 917.0 5857.0
1998 841.3 776.3 755.8 495.3 173.5 79.5 1.8 3.3 66.3 343.5 628.0 831.8 4996.4
1999 1016.8 860.3 793.3 497.3 206.5 35.0 1.5 5.7 59.3 405.5 528.8 852.3 5262.3
2000 1125.8 902.3 686.0 545.5 224.0 58.3 2.8 13.1 140.0 365.0 666.0 1109.0 5837.8
2001 1104.5 913.1 880.5 472.0 211.0 23.0 15.3 2.0 99.3 345.3 503.0 758.8 5327.8
2001 1104.5 913.1 880.5 472.0 211.0 23.0 15.3 2.0 99.3 345.3 503.0 758.8 5327.8
2003 1203.0 1037.0 822.0 561.0 305.0 78.0 0.0 1.0 44.0 401.0 532.0 892.0 5876.0
2004 1285.0 975.0 774.0 464.0 154.0 52.0 1.0 15.0 41.0 361.0 608.0 934.0 5664.0
2005 1125.0 922.0 929.0 478.0 338.0 34.0 4.0 0.0 41.0 306.0 539.0 986.0 5702.0
2006 854.0 914.0 849.0 454.0 209.0 35.0 0.0 3.0 108.0 372.0 491.0 746.0 5035.0
2007 927.0 1060.4 837.0 559.0 211.0 41.0 2.0 13.0 66.0 189.0 679.0 948.0 5532.4
2008 983.0 900.9 846.0 439.6 276.1 16.4 0.0 2.9 82.8 408.8 663.9 676.4 5296.8
2009 1217.0 867.4 827.4 466.7 205.6 66.1 16.2 3.6 111.3 394.5 486.1 960.9 5622.8
2010 1112.5 915.6 643.7 314.8 156.3 27.4 1.5 2.5 45.3 325.6 621.9 1058.9 5226.0
2011 1202.4 922.7 797.6 445.9 175.2 24.2 0.0 0.0 44.0 310.6 483.3 792.6 5198.5
2012 917.4 819.3 569.9 435.8 143.3 49.9 0.2 1.6 76.7 265.3 717.1 787.5 4784.0
2013 1010.5 929.1 855.6 493.4 246.0 30.2 0.0 15.6 139.5 304.9 679.2 908.3 5612.3
2014 1193.6 1019.6 955.2 543.6 212.7 22.6 0.0 5.6 98.6 311.8 695.7 843.7 5902.7
2015 1194.7 1307.1 986.3 542.4 162.2 63.1 0.0 0.0 22.7 397.7 537.2 570.6 5784.0
2016 1044.1 923.0 664.3 560.3 272.4 28.7 0.0 0.5 73.7 324.0 589.1 931.3 5411.4
2017 950.5 801.8 919.3 413.5 275.6 70.3 3.9 15.1 64.4 211.3 649.4 1033.6 5408.7
2018 1138.1 760.8 876.2 635.9 158.8 69.5 4.3 1.0 45.0 369.3 703.2 900.5 5662.6
2019 1111.0 906.5 870.9 446.8 243.9 47.2 0.0 6.0 62.5 303.1 745.9 923.5 5667.3
2020 914.8 816.9 681.3 600.8 278.7 39.7 0.0 2.8 92.1 328.0 530.3 914.4 5199.8
2021 1058.4 966.8 767.6 484.9 271.0 40.0 6.9 0.0 34.2 177.8 663.3 750.7 5221.6
2022                         0.0
                           
Year  Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec  Total
Average 1108.3 970.6 846.7 532.4 262.5 62.3 8.4 17.8 121.6 382.6 643.6 950.4 5874.7
                           
Maximum 1414.0 1307.1 1056.0 696.0 460.0 148.0 44.0 74.0 221.0 549.0 820.0 1273.0 6753.0
Minimum 839.0 776.3 569.9 314.8 143.3 16.4 0.0 0.0 22.7 189.0 483.3 570.6 4784.0