SPOKANE INTL AP, WASHINGTON

Monthly Total Heating Degree Days

(457938)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1889 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 45.00 258.10 a 396.00 819.00 1142.00 2660.10
1890 1459.50 1137.50 848.00 495.00 221.50 164.50 33.00 14.00 161.50 534.50 799.50 831.00 6699.50
1891 934.00 1116.50 980.50 450.00 211.00 156.50 45.50 34.50 174.50 400.50 755.00 990.50 6249.00
1892 1201.50 895.50 638.50 626.00 322.50 138.00 48.50 22.50 143.50 439.50 741.50 1161.00 6378.50
1893 1279.50 1123.50 863.50 640.00 352.00 227.00 43.00 31.00 217.00 606.50 903.00 1008.00 7294.00
1894 1195.00 1044.00 825.00 537.00 283.00 169.00 10.00 7.50 244.50 510.50 663.50 1041.00 6530.00
1895 1154.00 825.50 797.00 455.00 323.00 136.00 34.50 28.50 342.50 450.00 840.50 1047.00 6433.50
1896 1060.00 756.00 831.50 596.00 454.50 132.00 1.50 20.00 211.00 471.00 1034.00 907.00 6474.50
1897 1119.50 892.00 995.50 438.50 145.00 134.00 69.00 11.00 224.00 534.50 868.50 1079.50 6511.00
1898 1207.50 748.50 867.00 450.00 309.00 103.00 23.50 20.00 153.00 564.00 898.00 1254.50 6598.00
1899 1169.00 1129.50 843.00 568.00 416.50 156.50 22.50 138.00 100.00 566.00 600.50 986.50 6696.00
1900 906.50 939.00 615.50 417.50 241.50 47.00 32.50 75.00 213.00 522.50 924.50 866.00 5800.50
1901 1083.50 924.50 727.00 584.00 240.50 255.50 29.00 1.00 301.50 344.00 721.00 989.50 6201.00
1902 1154.00 812.00 781.50 552.50 302.00 157.00 102.50 51.00 219.50 424.50 845.00 1057.00 6458.50
1903 1019.50 1044.00 806.00 605.00 354.00 39.50 77.00 47.50 286.50 491.50 845.00 1045.50 6661.00
1904 1003.00 931.00 906.00 437.50 292.00 143.00 38.50 28.50 155.50 437.50 631.00 975.00 5978.50
1905 1060.00 983.00 666.50 460.50 339.00 129.50 11.50 43.00 163.50 689.50 880.00 1068.00 6494.00
1906 1060.00 839.50 877.00 385.50 295.00 201.50 0.00 29.00 164.50 446.00 886.00 1009.50 6193.50
1907 1432.00 893.00 815.00 565.50 242.00 159.00 18.00 124.50 237.50 349.00 736.00 976.00 6547.50
1908 1073.00 944.50 765.00 485.50 378.00 142.00 12.00 75.50 168.50 531.00 725.50 1116.00 6416.50
1909 1347.00 837.00 704.50 599.00 354.50 104.00 61.00 36.50 156.50 501.50 749.50 1217.50 6668.50
1910 1140.00 1066.00 580.50 395.50 200.00 132.00 3.00 92.00 190.50 443.00 774.00 953.00 5969.50
1911 1066.50 977.50 667.00 535.00 390.50 103.00 29.00 28.50 272.00 532.00 901.50 1108.50 6611.00
1912 1188.00 865.00 827.50 504.50 262.50 102.50 63.00 99.50 272.00 613.50 743.50 1017.50 6559.00
1913 1262.00 1151.50 921.50 505.50 299.00 93.00 56.00 51.50 192.50 618.50 733.50 1045.50 6930.00
1914 895.00 938.50 667.00 462.00 216.00 165.00 5.00 17.00 228.50 475.50 726.00 1257.50 6053.00
1915 1201.50 779.00 620.50 367.00 294.00 125.50 37.50 0.00 218.50 436.50 846.50 1055.00 5981.50
1916 1498.00 925.00 731.50 498.00 415.50 173.50 42.00 31.00 180.00 559.00 957.50 1282.50 7293.50
1917 1199.50 984.50 1001.50 614.50 317.50 171.00 10.00 0.50 112.50 454.00 687.50 886.50 6439.50
1918 1035.00 935.50 683.50 456.50 357.00 51.00 12.00 72.00 56.00 392.50 796.00 1023.50 5870.50
1919 1031.00 917.00 767.50 448.00 306.00 126.50 11.00 17.50 197.50 667.50 923.00 1314.50 6727.00
1920 1126.50 915.00 795.00 611.00 370.50 147.50 4.00 65.00 190.50 528.50 783.00 959.50 6496.00
1921 1012.50 850.00 768.00 580.50 260.50 49.50 18.00 7.50 313.50 440.00 844.00 1116.00 6260.00
1922 1378.00 1095.50 871.00 613.00 332.50 11.00 0.00 23.00 115.00 413.50 916.50 1321.50 7090.50
1923 986.50 1149.50 791.00 507.00 293.00 138.50 13.50 15.00 116.00 458.50 781.00 1011.00 6260.50
1924 1240.50 705.00 785.00 522.00 144.00 77.50 22.50 42.50 192.50 472.00 870.50 1270.00 6344.00
1925 1068.50 696.00 724.50 393.00 181.50 118.50 0.00 51.00 157.50 587.00 848.50 884.00 5710.00
1926 1065.50 711.00 637.00 339.50 263.00 97.50 0.50 27.50 355.50 451.50 735.00 1072.50 5756.00
1927 1149.00 851.50 772.50 556.50 384.50 56.00 10.00 30.50 230.00 455.00 760.00 1344.00 6599.50
1928 1130.00 972.00 690.50 565.50 156.50 95.50 16.50 21.50 150.00 480.50 821.50 1098.50 6198.50
1929 1463.50 1222.50 723.00 602.50 270.00 124.00 5.00 7.00 242.00 412.50 950.50 935.50 6958.00
1930 1514.00 753.00 709.50 336.00 311.50 134.50 2.50 2.50 128.50 584.00 856.50 1140.50 6473.00
1931 950.00 850.00 724.00 472.00 191.00 85.50 4.50 6.50 177.50 484.00 951.50 1109.50 6006.00
1932 1206.50 1023.50 829.00 451.00 291.00 74.50 16.50 45.00 146.00 492.00 690.50 1181.50 6447.00
1933 1031.00 1168.00 768.50 496.50 390.50 94.00 0.50 37.50 250.00 411.50 777.00 842.50 6267.50
1934 854.50 716.00 552.00 261.50 189.50 65.00 13.00 7.00 262.00 424.00 643.00 995.00 4982.50
1935 1045.00 823.50 827.50 595.50 284.00 103.50 32.00 45.50 97.50 557.50 957.00 1044.50 6413.00
1936 1028.00 1382.00 814.50 391.00 145.00 79.50 0.00 10.50 184.50 398.50 980.50 992.50 6406.50
1937 1708.00 1017.00 706.00 551.00 244.00 115.50 5.50 60.50 138.00 385.50 738.00 956.00 6625.00
1938 1039.00 880.50 741.00 456.50 272.50 73.00 13.00 22.00 57.50 428.50 896.50 996.00 5876.00
1939 941.00 1033.50 738.00 410.00 201.00 169.50 16.00 4.00 117.50 481.00 760.00 868.00 5739.50
1940 1086.00 843.50 611.50 433.50 167.00 42.00 8.50 2.00 81.00 373.50 981.50 961.50 5591.50
1941 1024.50 745.50 602.00 394.00 293.50 115.00 0.00 37.50 283.00 542.50 743.00 971.50 5752.00
1942 1312.00 952.00 785.50 455.50 378.50 183.50 13.50 49.50 119.50 454.00 898.50 1009.50 6611.50
1943 1340.50 891.00 905.00 439.00 392.50 202.50 35.50 32.00 93.50 469.00 823.50 1108.50 6732.50
1944 1079.50 941.50 869.50 513.00 262.50 104.00 28.00 27.00 152.50 333.00 846.50 1136.00 6293.00
1945 1002.50 837.00 841.00 608.50 251.50 165.50 9.00 24.00 263.50 439.50 847.50 1093.00 6382.50
1946 1058.00 835.00 741.50 512.00 246.50 154.00 12.50 19.00 206.50 645.50 913.50 1003.50 6347.50
1947 1268.50 808.50 695.50 504.00 183.50 126.50 14.00 36.00 200.00 444.00 907.50 1049.50 6237.50
1948 1164.00 1045.00 892.00 644.00 391.00 70.00 64.50 42.00 238.50 549.50 906.50 1347.50 7354.50
1949 1751.00 1079.50 836.00 473.00 230.50 132.00 38.00 39.00 154.50 645.00 712.50 1154.50 7245.50
1950 1736.50 986.50 907.00 634.50 397.50 165.50 28.50 11.00 151.00 568.50 865.00 974.50 7426.00
1951 1177.50 919.00 952.50 503.00 328.50 135.50 24.50 61.00 169.50 598.00 879.00 1327.50 7075.50
1952 1289.00 1009.00 878.50 462.00 264.00 145.00 30.00 40.50 103.00 327.00 969.50 1077.00 6594.50
1953 841.00 839.50 776.00 583.00 391.50 238.00 12.50 46.50 155.00 416.50 741.00 986.00 6026.50
1954 1180.50 893.50 891.00 646.00 305.50 244.00 49.00 76.00 232.50 584.00 706.50 1081.00 6889.50
1955 1180.00 1039.50 1050.00 732.00 486.00 133.50 94.50 15.50 242.00 556.00 1108.50 1185.50 7823.00
1956 1121.00 1231.00 896.50 454.00 258.50 195.50 20.00 69.00 154.50 580.00 971.00 1062.00 7013.00
1957 1550.00 1018.50 851.00 514.50 194.00 136.00 34.00 43.50 108.00 620.50 883.50 928.50 6882.00
1958 1023.50 705.50 811.50 603.50 149.00 80.50 6.00 11.50 232.00 460.00 878.50 1012.50 5974.00
1959 1117.00 967.50 801.50 528.00 448.50 136.50 56.00 87.50 317.00 588.50 1005.00 1122.50 7175.50
1960 1379.00 998.50 832.50 574.50 428.00 122.00 3.50 101.50 159.50 510.00 895.50 1192.00 7196.50
1961 1075.50 783.50 779.00 598.00 373.50 73.00 2.50 0.00 274.50 613.50 1030.50 1190.50 6794.00
1962 1315.50 914.50 941.00 456.50 438.50 154.50 64.50 68.50 162.50 539.50 813.00 988.00 6856.50
1963 1418.00 775.00 757.00 600.00 323.50 149.50 38.50 30.00 80.00 433.00 809.00 1195.00 6608.50
1964 1106.50 1039.00 907.50 616.50 377.50 154.00 35.00 121.50 294.50 530.00 983.50 1272.00 7437.50
1965 1130.50 921.00 949.00 534.50 393.50 132.50 33.50 66.00 338.00 383.00 811.50 1084.50 6777.50
1966 1096.50 902.50 815.00 570.00 299.50 197.00 32.50 44.50 70.50 551.00 844.50 981.00 6404.50
1967 965.00 806.50 866.50 683.00 377.50 101.00 8.50 3.00 74.00 516.50 889.50 1154.00 6445.00
1968 1153.00 789.00 710.00 661.00 350.00 144.00 21.00 94.00 205.00 614.00 904.50 1251.50 6897.00
1969 1509.50 1089.50 912.50 565.50 243.50 91.50 44.00 44.50 195.00 662.50 861.00 1104.50 7323.50
1970 1214.50 805.50 867.00 704.00 314.50 104.50 15.00 7.00 326.00 622.50 870.00 1157.00 7007.50
1971 1029.50 881.50 925.50 592.00 278.50 221.00 64.50 19.50 303.00 646.00 889.00 1216.00 7066.00
1972 1314.50 995.50 733.50 690.00 279.50 130.50 38.50 18.50 297.50 552.00 801.50 1227.50 7079.00
1973 1178.50 843.00 742.50 566.00 292.00 156.00 18.50 48.00 197.00 552.00 939.00 985.00 6517.50
1974 1268.50 830.50 822.00 560.50 461.00 100.00 42.50 24.50 143.50 527.50 859.00 1070.00 6709.50
1975 1283.50 1129.00 961.50 701.00 382.00 180.50 23.50 79.00 140.00 562.00 938.00 1057.00 7437.00
1976 1099.50 955.50 929.50 594.50 324.50 218.50 21.00 74.50 78.00 565.00 877.50 1097.00 6835.00
1977 1333.00 838.00 831.00 441.00 418.00 69.00 59.00 58.50 298.50 573.00 930.00 1204.50 7053.50
1978 1161.00 869.50 708.00 581.50 421.00 106.00 38.50 101.50 260.00 572.00 1090.50 1428.50 7338.00
1979 1688.50 1014.00 763.50 587.50 318.50 139.50 42.50 5.00 94.00 430.00 1037.00 924.50 7044.50
1980 1372.50 886.50 818.50 399.50 289.50 217.50 20.50 82.50 203.00 549.50 861.50 986.00 6687.00
1981 999.00 872.50 747.50 579.50 405.00 249.50 77.00 7.50 214.50 593.00 753.50 1095.50 6594.00
1982 1202.00 922.00 768.00 646.50 337.00 79.50 65.50 18.50 198.00 588.00 1001.50 1170.00 6996.50
1983 906.00 754.00 682.00 563.00 291.00 118.00 60.00 3.00 238.50 476.00 772.50 1512.50 6376.50
1984 1071.00 887.00 721.00 629.50 466.50 202.50 23.50 19.00 270.50 671.00 877.50 1384.50 7223.50
1985 1351.00 1122.50 903.00 510.00 288.00 131.00 0.00 67.50 351.00 630.00 1367.50 1418.00 8139.50
1986 1083.00 934.50 689.50 604.00 364.00 70.00 84.50 4.00 315.50 497.50 907.50 1201.00 6755.00
1987 1195.50 838.50 721.00 426.50 262.00 89.00 54.50 53.50 119.00 482.00 807.50 1214.00 6263.00
1988 1249.00 858.00 785.00 484.50 335.00 177.50 49.50 19.00 246.00 364.50 862.50 1179.00 6609.50
1989 1121.50 1211.50 880.00 482.50 370.00 68.00 25.00 80.50 154.50 560.00 811.50 1053.50 6818.50
1990 982.00 974.50 748.00 460.00 379.00 171.00 39.50 44.00 57.00 618.50 780.50 1362.50 6616.50
1991 1220.50 721.50 874.00 578.00 414.50 254.00 17.00 18.00 113.00 583.00 925.00 998.50 6717.00
1992 1031.50 757.50 606.00 486.00 214.00 65.50 34.00 62.50 240.00 489.50 922.00 1305.50 6214.00
1993 1338.50 1109.00 843.50 586.00 196.00 171.50 159.50 87.00 220.50 464.50 1069.50 1059.00 7304.50
1994 911.50 1007.00 721.50 477.00 267.50 162.50 26.50 15.00 86.00 565.00 979.50 1078.50 6297.50
1995 1054.00 777.50 777.50 584.50 269.00 176.00 24.50 92.50 149.50 656.00 746.50 1129.00 6436.50
1996 1227.00 1053.00 888.00 562.00 478.50 149.50 36.50 51.50 288.50 611.00 955.00 1247.50 7548.00
1997 1137.00 932.50 800.00 651.50 270.50 160.00 37.00 16.00 120.00 556.50 792.50 1107.00 6580.50
1998 1066.00 755.00 727.50 512.00 280.00 94.50 0.00 21.00 104.00 573.00 754.50 1129.00 6016.50
1999 1016.50 843.50 777.50 602.00 453.50 190.50 78.00 38.00 188.00 548.00 708.00 1036.50 6480.00
2000 1149.00 914.50 808.50 503.50 371.50 148.00 53.50 45.50 291.00 580.00 1143.50 1251.00 7259.50
2001 1174.00 1069.50 801.50 641.00 324.50 208.00 36.00 21.00 102.50 592.00 753.00 1143.50 6866.50
2002 1068.00 941.50 948.00 589.50 418.50 141.50 29.50 31.50 224.50 685.00 846.50 969.00 6893.00
2003 965.50 893.50 752.00 596.50 371.50 96.00 11.50 1.50 156.50 423.50 1065.00 1092.50 6425.50
2004 1202.50 955.00 674.00 463.50 324.50 135.00 16.50 36.00 211.00 487.50 864.50 1026.50 6396.50
2005 1136.50 852.50 719.50 510.00 265.50 173.00 12.50 25.50 235.50 497.50 927.50 1268.50 6624.00
2006 913.50 956.00 819.00 532.50 309.50 108.50 9.50 32.00 172.00 558.50 871.00 1130.50 6412.50
2007 1250.00 869.50 690.50 554.00 278.50 139.00 0.00 29.00 201.00 563.00 901.50 1132.00 6608.00
2008 1249.00 959.50 889.50 689.50 278.50 184.00 9.50 56.00 149.00 536.50 794.00 1335.50 7130.50
2009 1212.00 966.00 941.50 593.00 311.50 98.50 18.00 24.00 108.50 674.50 843.00 1259.00 7049.50
2010 928.00 759.50 739.00 547.50 428.50 194.00 49.50 49.00 165.00 478.00 957.00 1104.50 6399.50
2011 1111.00 1012.00 797.50 704.00 406.50 197.00 44.00 9.50 102.50 525.00 898.00 1127.50 6934.50
2012 1086.00 937.00 817.50 503.00 353.00 180.50 21.00 16.00 72.50 505.50 767.00 1029.20 a 6288.20
2013 1237.50 860.00 729.50 10.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 40.50 z 2827.00
Period of Record Statistics
MEAN 1166.23 928.25 794.71 533.43 312.99 135.75 29.46 38.56 189.95 516.77 858.60 1102.89 6608.49
S.D. 179.05 129.27 97.33 88.26 80.43 49.95 25.34 29.52 72.97 84.19 112.65 133.48 486.55
SKEW 1.04 0.56 0.01 -0.23 -0.05 0.16 1.65 1.00 0.23 -0.09 0.80 0.52 0.04
MAX 1751.00 1382.00 1050.00 732.00 486.00 255.50 159.50 138.00 355.50 689.50 1367.50 1512.50 8139.50
MIN 841.00 696.00 552.00 261.50 144.00 11.00 0.00 0.00 56.00 327.00 600.50 831.00 4982.50
NO YRS 124 124 124 123 123 123 123 124 124 124 124 124 123