date! ,

Monthly Total Heating Degree Days

(a vali)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 197203
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
Months with 5 missing days or less use mean for missing day(s)
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1867 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1868 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1869 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1870 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1871 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1872 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1873 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1874 1017.50 1020.00 869.00 671.00 226.00 25.50 0.00 15.50 154.00 390.00 726.00 1052.50 6167.00
1875 1095.00 906.00 940.00 543.00 183.50 27.00 23.00 23.00 186.50 340.50 753.00 965.00 5985.50
1876 1094.50 898.50 858.50 474.00 303.50 76.00 9.50 28.00 137.50 460.50 817.50 1080.50 6238.50
1877 1006.00 837.00 586.50 665.00 346.50 88.00 13.50 14.50 125.50 548.50 894.50 1127.50 6253.00
1878 1340.00 978.50 749.50 516.00 278.00 96.00 0.00 6.00 116.50 306.00 634.00 1095.00 6115.50
1879 962.50 670.00 363.50 458.00 117.00 55.50 0.00 1.50 71.50 432.50 836.00 1181.00 5149.00
1880 1117.50 1188.50 1019.00 639.00 294.50 52.50 29.50 50.50 275.50 583.50 1072.50 1128.00 7450.50
1881 1324.00 924.00 911.00 399.50 231.50 20.50 8.00 11.00 149.50 425.00 296.50 t 0.00 z 4404.00
1882 1082.00 870.15 b 698.00 522.50 286.50 47.00 0.00 42.00 166.50 444.50 765.00 1022.00 5946.15
1883 1199.50 753.41 a 618.50 638.79 a 272.50 28.00 o 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3482.70
1884 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1038.50 1038.50
1885 1241.00 906.50 744.00 551.00 362.50 76.50 0.00 21.50 140.00 451.00 734.50 997.50 6226.00
1886 1238.00 837.00 905.00 608.50 159.00 67.00 0.50 6.50 183.00 446.50 921.00 940.50 6312.50
1887 1086.00 871.63 a 649.50 548.00 310.00 10.00 8.50 30.00 108.00 419.00 690.50 1179.50 5910.63
1888 1082.50 846.50 830.50 433.50 349.50 35.50 0.50 62.00 80.50 433.50 823.50 976.50 a 5954.50
1889 1251.00 958.50 723.50 403.00 267.50 74.50 81.00 0.00 159.50 402.00 895.50 780.00 5996.00
1890 1018.50 795.50 715.50 517.50 186.00 58.50 7.75 a 12.00 137.00 465.50 759.31 a 942.50 5615.56
1891 1311.50 1003.50 889.00 556.50 376.00 108.50 0.00 25.50 110.00 428.50 735.52 a 1222.50 6767.02
1892 1116.00 889.50 795.67 a 548.50 312.50 69.00 0.00 9.30 a 39.00 500.50 795.00 1126.50 6201.47
1893 974.50 888.00 827.00 516.00 299.50 25.50 6.50 33.50 162.00 475.00 798.00 970.50 5976.00
1894 1151.50 1091.50 796.50 480.50 196.50 59.00 10.00 46.00 179.00 406.00 650.00 970.00 6036.50
1895 1141.00 1023.00 784.00 481.50 325.00 88.50 36.50 13.50 103.50 478.00 898.50 1213.00 6586.00
1896 964.00 928.00 759.50 514.00 238.00 14.00 5.50 26.50 145.00 511.00 785.50 901.00 5792.00
1897 1165.50 970.00 878.00 520.34 a 251.00 67.00 17.00 17.50 99.00 495.00 709.50 1111.50 6301.34
1898 1250.50 808.00 849.00 466.00 329.50 100.00 20.00 7.50 132.50 486.00 840.50 1270.00 6559.50
1899 1186.78 a 1018.50 761.50 476.50 292.00 78.00 17.00 1.50 98.00 452.50 702.50 1001.00 6085.78
1900 915.00 866.50 657.50 630.00 223.50 24.00 12.00 6.00 143.50 436.50 710.50 1008.50 5633.50
1901 1053.50 879.50 840.00 547.76 a 287.50 78.00 1.00 3.50 124.00 395.00 666.00 996.00 5871.76
1902 970.00 836.00 894.50 389.48 a 248.50 13.00 18.50 23.00 169.00 411.50 763.00 1046.00 5782.48
1903 1074.50 1054.50 803.00 538.00 334.00 161.50 5.00 0.50 186.00 430.50 645.50 1028.00 6261.00
1904 1167.50 767.50 694.00 472.50 269.70 a 90.50 4.00 10.00 126.50 502.00 750.50 1103.50 5958.20
1905 1143.50 941.50 748.00 613.50 341.50 36.00 30.00 80.08 a 140.00 521.00 774.00 1228.50 6597.58
1906 1123.00 851.00 769.50 536.50 322.00 71.00 69.00 30.00 151.50 544.00 801.43 b 928.50 6197.43
1907 998.72 a 711.50 648.00 520.86 a 485.00 147.00 2.58 a 39.50 146.38 a 438.00 841.00 1055.50 6034.04
1908 1070.50 942.50 700.00 553.00 432.00 87.50 23.00 13.50 136.00 576.00 853.00 1064.50 6451.50
1909 930.50 949.00 883.00 626.00 406.50 48.50 0.00 8.50 184.00 465.50 718.00 1336.50 6556.00
1910 1080.50 946.50 595.00 523.00 289.00 21.50 1.50 20.00 70.00 481.00 703.00 1022.50 5753.50
1911 946.50 963.50 722.50 536.00 265.50 40.00 36.00 33.50 76.00 565.50 981.50 1270.00 6436.50
1912 1119.50 999.00 847.00 681.00 305.50 103.50 13.00 14.00 208.00 498.00 772.50 1211.00 6772.00
1913 1247.00 1000.50 896.50 534.00 201.00 85.00 4.50 7.00 236.50 533.50 676.50 1196.00 6618.00
1914 976.00 908.00 792.00 509.50 271.00 32.00 22.50 29.50 89.00 484.00 658.00 1208.00 5979.50
1915 1259.00 923.50 905.00 519.50 397.00 96.50 30.00 33.00 163.00 404.50 756.50 1022.00 6509.50
1916 1067.50 829.50 662.00 551.50 295.00 42.50 9.00 20.00 131.50 446.00 782.50 1150.00 5987.00
1917 1145.50 907.00 906.00 567.00 498.50 66.50 0.00 12.50 111.00 407.00 592.00 833.50 6046.50
1918 1203.00 816.50 683.00 602.00 290.00 26.38 a 1.50 5.50 147.50 405.00 899.00 1177.00 6256.38
1919 1260.50 1056.00 850.95 a 509.50 279.50 92.07 a 3.50 0.50 134.00 555.00 792.50 954.50 6488.52
1920 965.00 796.98 a 856.50 725.50 273.00 69.50 0.50 48.00 147.41 a 504.00 820.00 1165.50 6371.90
1921 1008.50 830.50 686.65 a 649.50 276.93 a 114.50 23.50 18.00 61.00 371.50 660.50 882.50 5583.58
1922 1144.50 919.00 884.00 621.50 281.50 49.50 0.00 2.00 67.50 420.00 875.00 961.00 6225.50
1923 932.50 921.50 939.00 581.00 284.50 58.00 5.00 35.50 194.00 594.00 784.00 1112.00 6441.00
1924 1176.50 857.50 970.50 583.50 277.00 38.50 10.00 10.50 165.50 426.50 712.00 1225.00 6453.00
1925 1226.50 812.50 669.08 a 432.00 192.00 41.00 5.00 33.58 a 118.00 480.00 829.50 1114.00 5953.17
1926 1230.00 801.50 811.68 a 554.00 347.00 42.50 23.25 a 4.00 83.50 377.00 749.50 1108.50 6132.43
1927 890.50 781.50 786.50 483.50 204.00 87.50 1.50 8.00 138.50 424.00 656.00 1178.50 5640.00
1928 968.00 916.09 a 720.50 600.50 284.50 58.97 a 5.50 40.50 108.50 384.00 828.50 1062.00 5977.55
1929 1120.50 1049.50 840.50 542.50 334.00 47.00 7.00 11.37 a 142.50 479.00 977.50 983.50 6534.87
1930 1223.00 743.00 863.00 379.00 392.50 37.00 11.50 14.00 142.00 449.50 859.00 1154.00 6267.50
1931 1088.50 831.50 891.00 515.00 312.00 24.00 3.50 17.00 89.50 377.50 837.50 1155.50 6142.50
1932 1303.03 a 791.00 877.00 508.00 289.00 89.50 4.00 15.50 137.50 545.50 750.50 1233.50 6544.03
1933 1174.50 1067.50 721.00 664.50 360.00 43.50 0.00 11.00 37.00 350.50 699.50 857.00 5986.00
1934 1001.50 711.50 640.50 427.00 143.50 35.50 0.00 17.00 147.50 331.00 757.00 1007.00 5219.00
1935 939.00 836.00 749.50 548.00 437.00 29.50 1.00 3.00 133.50 419.00 789.00 1046.50 5931.00
1936 1139.50 916.00 736.50 473.50 188.00 40.00 5.00 6.50 182.50 467.00 763.00 1007.50 5925.00
1937 1276.50 916.74 a 846.50 513.50 203.00 81.72 a 3.00 0.00 71.50 382.00 684.50 958.00 5936.96
1938 1032.00 824.50 749.00 497.00 296.50 30.00 10.50 1.50 100.00 364.00 926.00 949.50 5780.50
1939 1123.00 1135.50 752.00 475.34 a 215.00 18.50 6.00 6.00 87.50 458.00 732.00 874.50 5883.34
1940 1094.00 953.50 708.00 517.50 218.50 34.50 1.50 23.00 74.50 352.50 817.50 926.00 5721.00
1941 1042.00 762.00 805.00 635.00 248.00 127.50 0.00 0.50 117.50 450.50 730.00 984.50 5902.50
1942 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1943 960.40 e 769.42 d 750.89 d 333.46 d 176.00 g 72.69 d 0.00 e 0.60 e 94.80 e 447.71 e 755.40 e 0.00 z 4185.37
1944 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1945 1089.50 801.50 840.50 620.50 234.00 94.50 0.50 1.50 139.50 426.00 751.00 1168.50 6167.50
1946 1118.50 868.00 727.50 303.50 285.50 11.50 6.00 8.00 74.50 479.00 871.00 922.00 5675.00
1947 1187.00 810.50 809.00 570.50 213.50 85.00 c 0.00 8.50 46.00 320.00 929.48 a 1122.41 b 6101.90
1948 1107.45 b 947.68 a 740.50 f 413.00 226.30 a 57.32 b 0.00 n 0.00 z 83.04 b 343.00 h 916.50 992.00 4743.28
1949 1235.50 969.63 a 353.00 p 499.66 a 228.00 18.50 j 2.00 8.27 a 36.00 l 494.00 650.00 1147.52 a 5234.57
1950 1064.00 829.50 807.50 450.50 234.00 g 12.50 i 10.50 17.71 c 184.66 a 203.50 666.50 868.50 5102.87
1951 1046.50 853.50 800.50 530.50 227.50 87.00 0.00 b 16.50 74.00 400.50 860.00 1107.00 6003.50
1952 976.00 966.00 954.50 530.00 269.00 27.00 11.50 0.00 86.00 313.00 914.50 1139.00 6186.50
1953 912.90 b 954.50 499.00 m 532.76 a 394.73 a 26.00 4.50 4.13 a 33.75 b 402.00 716.50 1167.50 5149.27
1954 994.07 a 701.50 864.26 b 94.00 w 135.50 i 27.50 0.00 c 3.50 41.50 300.50 615.00 945.50 4493.33
1955 1132.00 974.50 745.50 521.50 295.00 99.00 6.00 9.00 59.50 355.50 774.50 978.00 5950.00
1956 938.00 1063.50 733.00 571.00 154.00 0.00 4.00 27.00 21.50 339.00 870.50 1051.50 5773.00
1957 985.50 690.00 817.00 597.50 404.00 82.50 2.00 16.50 110.50 467.50 927.00 948.50 6048.50
1958 1098.50 780.00 933.50 589.50 178.00 6.00 3.00 12.50 117.50 434.50 733.50 847.50 5734.00
1959 1039.00 886.50 846.50 509.00 272.50 30.00 3.00 12.00 111.50 452.50 808.50 950.50 5921.50
1960 1207.00 1096.00 734.50 472.00 300.50 54.00 6.09 c 7.00 80.50 483.50 726.00 1137.00 6304.09
1961 1125.00 885.50 786.50 565.50 234.00 21.50 5.50 24.50 239.48 a 480.50 879.00 1169.50 6416.48
1962 1174.00 810.50 940.00 437.50 220.00 56.50 3.50 2.50 131.00 404.50 714.50 984.00 5878.50
1963 1275.50 879.00 810.50 489.50 190.00 77.00 0.00 21.00 69.50 289.00 741.00 1056.00 5898.00
1964 1220.50 1190.00 952.00 624.00 276.00 58.00 6.50 13.00 138.00 354.50 791.50 1092.00 6716.00
1965 1033.00 959.00 934.50 511.00 330.00 112.50 0.00 29.00 161.50 398.50 672.00 997.00 6138.00
1966 1218.30 a 1058.50 743.47 b 525.52 a 211.00 67.00 0.50 26.00 54.50 p 412.50 678.00 1072.08 a 6012.87
1967 1096.00 838.50 641.50 448.39 b 294.50 76.50 3.62 a 62.50 170.69 a 398.00 696.50 1209.00 5935.70
1968 1083.45 a 844.00 778.00 622.00 329.50 51.00 15.50 55.50 172.00 388.00 793.00 1160.50 6292.45
1969 953.50 889.50 956.00 457.50 244.50 79.50 0.00 0.00 111.50 505.00 820.86 a 983.50 6001.36
1970 1117.50 787.50 886.00 614.00 216.50 131.00 0.00 3.50 155.00 602.95 a 768.00 987.00 6268.95
1971 1092.50 913.50 759.50 567.00 300.70 a 59.00 8.00 26.57 c 197.00 0.00 z 790.56 c 1171.59 b 5885.91
1972 1075.18 a 843.50 335.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1918.68
Period of Record Statistics
MEAN 1102.33 896.54 794.30 531.30 280.68 60.11 8.71 17.61 125.91 437.39 778.96 1058.64 6115.06
S.D. 108.68 106.85 104.98 77.14 72.52 32.89 13.21 16.00 48.20 72.37 90.76 114.27 349.04
SKEW 0.10 0.42 -0.70 -0.19 0.51 0.54 3.15 1.42 0.24 -0.17 0.49 -0.01 0.43
MAX 1340.00 1190.00 1019.00 725.50 498.50 161.50 81.00 80.08 275.50 602.95 1072.50 1336.50 7450.50
MIN 890.50 670.00 363.50 303.50 117.00 0.00 0.00 0.00 21.50 203.50 592.00 780.00 5149.00
NO YRS 96 96 92 94 92 92 93 93 92 92 93 93 85