DAVENPORT, WASHINGTON

Monthly Total Heating Degree Days

(452007)

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
1893 0.00 z 0.00 z 996.81 b 653.89 c 370.50 226.50 64.50 26.00 268.00 635.50 949.00 1126.33 a 5317.03
1894 1298.50 1141.50 862.50 597.50 297.50 252.00 45.50 26.50 317.00 618.00 0.00 z 0.00 z 5456.50
1895 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
1896 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
1897 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
1898 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
1899 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
1900 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
1901 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
1902 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
1903 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
1904 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
1905 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
1906 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
1907 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
1908 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
1909 0.00 z 0.00 z 176.50 v 667.50 428.50 172.50 110.00 70.00 181.00 576.50 828.00 1343.00 4377.00
1910 1291.00 1159.00 639.00 442.00 243.50 187.50 22.00 141.50 258.50 511.00 876.50 1092.50 6864.00
1911 1286.00 1121.50 802.50 604.82 b 453.00 171.35 d 35.00 f 33.00 h 345.50 402.50 j 1007.50 1240.00 a 7032.17
1912 1387.77 a 952.34 a 900.55 a 401.00 i 345.02 d 174.64 b 90.93 a 132.35 e 266.00 f 485.00 k 842.59 a 1149.21 c 5975.40
1913 1435.41 c 1284.89 a 1015.80 c 545.77 d 379.50 134.50 110.50 78.50 282.00 690.00 853.00 1170.50 7980.37
1914 1059.50 1060.00 761.80 d 592.50 358.16 c 304.00 36.34 b 46.00 335.50 537.33 a 672.00 g 1403.50 6494.64
1915 1385.70 a 891.69 b 686.50 430.00 382.33 a 233.50 99.00 2.00 307.50 526.50 980.50 1162.50 a 7087.73
1916 1646.00 1038.50 841.43 c 627.50 627.48 b 275.17 a 179.50 0.00 z 0.00 z 665.00 1072.50 1438.50 8411.58
1917 1408.00 1145.50 1181.50 709.00 431.50 326.00 48.00 19.00 211.50 522.00 744.00 1059.50 7805.50
1918 1082.00 1051.50 823.00 495.50 406.50 90.50 37.50 95.00 78.50 464.00 896.00 1091.50 6611.50
1919 1046.50 861.00 770.00 544.14 a 337.38 a 207.32 b 37.95 b 33.50 210.50 692.50 974.50 1389.50 7104.79
1920 1242.00 971.50 854.50 677.50 465.00 273.50 22.50 86.50 282.00 611.50 889.00 1105.00 7480.50
1921 853.00 f 834.00 f 828.39 d 640.38 d 308.50 f 175.18 b 67.00 32.00 373.00 484.50 936.50 1217.50 4754.45
1922 1487.50 1294.00 1034.00 657.50 395.50 49.50 2.50 71.00 165.50 466.50 957.50 1460.62 a 8041.62
1923 1079.50 1223.00 824.00 482.00 361.50 208.45 a 39.50 32.50 165.50 514.00 843.00 1095.00 6867.95
1924 1359.50 776.50 823.50 580.00 185.50 117.50 40.50 59.93 a 207.50 565.00 949.50 1363.00 7027.93
1925 1224.00 803.00 774.00 447.50 249.00 177.50 4.50 79.50 184.80 e 631.07 c 924.50 979.08 a 6478.46
1926 1183.50 800.50 668.50 405.50 370.00 129.00 17.64 b 43.83 b 397.00 528.00 811.00 1215.41 b 6569.88
1927 1326.80 a 996.00 839.50 634.66 a 450.02 a 127.50 46.00 73.00 320.50 550.50 858.50 1434.00 7656.97
1928 1268.00 1128.00 778.50 639.00 236.50 180.00 43.50 59.00 212.50 564.50 908.00 1220.00 7237.50
1929 1636.50 1372.50 796.50 675.50 347.50 179.00 54.00 34.50 288.50 463.00 1001.50 1059.00 7908.00
1930 1644.50 892.00 778.00 436.50 391.50 221.50 44.00 32.50 212.00 647.50 977.50 1287.50 7565.00
1931 1144.00 1003.50 804.50 554.50 261.50 188.50 39.00 40.00 276.00 586.50 1035.50 1274.00 7207.50
1932 1353.00 1200.50 929.00 550.50 393.50 138.50 94.50 101.50 200.00 571.00 811.50 1325.00 7668.50
1933 1234.50 1271.67 d 907.50 596.00 516.00 193.00 44.50 63.50 356.00 507.00 867.50 967.50 7524.67
1934 956.00 778.00 631.50 348.50 295.00 166.00 73.00 29.50 364.00 507.50 781.00 1161.50 6091.50
1935 1188.50 903.50 898.47 b 690.00 409.00 215.50 95.00 103.50 178.00 639.00 1043.50 1136.00 7499.97
1936 1155.00 1499.50 847.00 473.00 197.50 127.50 30.50 37.00 228.00 459.50 972.41 a 1071.50 7098.41
1937 1799.00 1161.00 776.00 610.50 305.00 152.00 26.00 124.50 181.00 454.50 810.00 1057.00 7456.50
1938 1110.50 1010.50 827.00 519.00 351.50 114.50 24.00 86.28 a 92.00 473.00 967.00 1113.50 6688.78
1939 1082.00 1124.00 840.00 458.00 260.00 238.00 53.00 21.00 135.00 537.00 794.00 918.50 6460.50
1940 1175.50 923.50 652.00 513.00 183.00 63.50 19.50 23.00 101.00 457.50 1087.50 1090.00 6289.00
1941 1158.00 809.50 630.00 429.50 363.50 187.00 3.10 a 93.00 361.50 578.67 a 786.50 1038.50 6438.77
1942 1337.50 968.50 812.00 492.50 419.50 208.50 42.00 g 66.00 163.50 489.00 999.50 1172.50 7129.00
1943 1448.00 1034.50 1032.50 489.50 434.00 240.00 72.00 73.00 113.50 492.00 839.00 1144.50 7412.50
1944 1178.00 1030.00 875.50 521.50 313.50 148.00 42.00 39.50 185.50 336.50 919.00 1214.50 6803.50
1945 1100.50 878.00 874.50 647.50 317.50 227.00 35.00 37.50 297.50 486.00 983.50 1167.00 7051.50
1946 1188.50 958.50 779.00 546.00 296.50 240.00 60.00 68.50 256.50 713.50 1010.00 1088.50 7205.50
1947 1351.50 872.50 737.00 523.00 243.00 225.50 45.00 93.50 221.50 479.50 916.50 1129.00 6837.50
1948 1220.50 1075.50 882.50 662.50 415.00 74.00 95.00 76.50 258.00 567.50 935.50 1443.50 7706.00
1949 1851.50 1203.00 891.00 544.50 301.00 221.00 74.50 33.50 174.00 688.00 747.00 1174.50 7903.50
1950 1788.50 1064.50 932.50 648.50 397.00 182.50 56.50 29.50 177.50 631.00 901.50 997.00 7806.50
1951 1217.50 970.00 1008.02 a 546.00 354.50 188.50 34.00 74.50 208.50 625.50 923.00 1368.50 7518.52
1952 1365.00 1072.00 906.50 499.50 325.50 188.00 67.00 124.00 204.00 488.50 1035.52 a 1137.00 7412.52
1953 894.50 846.00 768.00 609.00 438.50 288.00 37.00 73.50 177.50 485.00 766.03 a 1000.00 6383.03
1954 1232.50 884.50 881.00 648.50 299.50 254.00 60.50 104.00 216.00 604.50 686.00 1132.50 7003.50
1955 1199.00 1053.50 1025.50 718.00 459.00 144.50 103.33 a 28.50 219.50 568.50 1126.00 1237.50 7882.83
1956 1140.00 406.50 r 915.50 454.50 251.50 201.00 27.00 60.00 164.50 580.00 981.50 1092.50 5868.00
1957 1539.50 1098.00 825.00 502.24 a 194.50 136.50 65.00 82.50 94.50 606.50 900.00 972.00 7016.24
1958 1012.50 674.50 808.50 589.50 174.50 82.00 12.00 16.50 245.00 489.00 888.50 1049.50 6042.00
1959 1112.00 958.50 789.50 510.00 448.50 163.50 65.50 92.50 275.00 587.50 960.00 1099.50 7062.00
1960 1336.00 956.50 807.50 565.50 421.50 128.00 8.00 117.50 167.50 478.00 872.50 1170.50 7029.00
1961 1079.00 770.50 759.00 585.50 343.50 55.50 5.00 3.50 287.50 632.50 1000.00 1202.00 6723.50
1962 1326.00 910.00 914.00 455.50 420.00 185.50 85.50 77.50 154.00 554.50 810.50 975.00 6868.00
1963 1350.00 784.50 762.50 583.50 333.00 160.50 47.50 49.50 79.00 465.50 804.00 1181.00 6600.50
1964 1145.50 1066.50 925.00 605.00 367.50 150.50 48.50 108.50 274.00 514.00 961.50 1239.00 7405.50
1965 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 78.00 100.50 232.00 m 469.00 0.00 z 841.00 i 647.50
1966 1176.50 922.00 833.00 0.00 z 0.00 z 276.50 104.50 118.00 206.50 599.00 819.50 1001.00 6056.50
1967 1008.50 845.50 876.00 732.50 450.05 c 126.50 34.00 10.00 86.00 0.00 z 0.00 z 0.00 z 4169.05
1968 0.00 z 0.00 z 0.00 z 0.00 z 206.00 l 193.00 50.00 128.50 215.00 623.00 911.50 1262.50 3383.50
1969 1561.00 1124.00 952.00 590.00 295.00 111.50 68.50 92.00 225.00 672.50 865.00 1140.00 7696.50
1970 1277.00 878.50 880.50 720.00 372.50 134.50 32.50 26.50 372.00 624.50 912.00 1247.50 7478.00
1971 1157.50 905.00 985.50 669.50 316.50 304.50 100.00 30.50 350.50 0.00 z 897.00 1328.00 7044.50
1972 1387.00 1065.00 772.00 721.00 347.50 190.50 82.00 38.00 380.50 576.50 882.00 1305.00 7747.00
1973 1247.00 923.00 786.00 596.00 354.00 223.50 64.50 79.00 233.00 583.00 1002.00 1008.00 7099.00
1974 1325.00 879.00 853.00 606.50 500.00 145.50 76.50 64.00 146.50 494.50 864.00 1082.50 7037.00
1975 1342.00 1157.00 987.50 696.00 414.00 218.50 38.50 0.00 z 145.50 610.00 929.00 1096.50 7634.50
1976 1200.50 1002.00 958.93 a 618.00 370.00 276.21 a 55.91 c 100.00 108.50 567.50 895.50 1160.50 7313.55
1977 1411.00 877.00 877.30 a 482.00 510.00 93.00 97.00 67.00 338.50 600.00 996.00 1213.50 7562.30
1978 1221.50 944.00 776.50 609.50 459.83 a 150.00 57.50 121.00 273.00 555.50 1092.00 1441.50 7701.83
1979 1672.50 1087.00 782.50 633.00 342.50 169.00 60.50 8.00 131.50 460.50 1066.00 1011.00 7424.00
1980 1458.00 1013.50 881.00 475.50 332.00 0.00 z 73.00 134.00 221.00 538.50 870.50 1037.39 c 7034.39
1981 994.50 909.00 736.50 628.00 409.50 311.00 87.00 29.50 254.50 622.50 829.50 1194.02 a 7005.52
1982 1336.00 1030.00 845.50 715.50 402.50 131.00 120.50 68.00 0.00 z 611.50 1013.50 1203.00 7477.00
1983 999.50 823.00 732.50 621.00 337.00 203.00 125.00 20.00 307.50 b 611.50 823.00 1566.53 a 7169.53
1984 1242.00 962.00 772.00 673.50 525.00 275.00 90.50 76.00 385.00 749.00 925.50 1553.50 8229.00
1985 1427.00 1282.00 1060.00 585.50 0.00 z 0.00 z 3.00 125.00 431.00 692.50 1390.50 1513.00 8509.50
1986 1209.00 1078.00 752.78 a 656.50 407.50 114.50 163.00 4.50 0.00 z 554.50 949.00 1276.50 7165.78
1987 1305.00 906.00 791.00 462.50 320.00 151.00 76.00 86.50 159.50 554.00 832.50 1223.50 6867.50
1988 1356.00 989.50 813.00 540.50 428.50 230.00 88.00 80.00 316.50 409.50 0.00 z 1252.00 6503.50
1989 1218.50 1231.00 933.50 537.50 421.50 111.50 72.00 120.00 213.00 0.00 z 854.50 1130.00 6843.00
1990 1032.50 1086.50 779.50 507.00 0.00 z 235.00 49.00 55.50 99.50 684.50 817.00 1428.50 6774.50
1991 1318.00 741.50 890.00 607.50 464.00 306.50 56.00 40.50 167.50 645.50 961.50 1069.50 7268.00
1992 1097.50 797.00 683.50 563.50 307.50 98.50 68.00 101.00 336.00 553.50 0.00 z 1415.50 6021.50
1993 1434.00 1184.00 926.50 636.50 230.00 230.00 187.50 117.00 253.50 539.50 1114.50 1105.00 7958.00
1994 958.00 1042.50 754.00 513.50 331.00 231.00 41.00 53.45 b 127.00 627.00 1049.50 1116.00 6843.95
1995 1097.50 829.50 828.00 628.50 324.00 201.00 51.50 171.50 152.00 664.00 822.50 1104.00 6874.00
1996 1258.00 1096.82 a 897.00 574.00 528.00 0.00 z 64.00 68.50 357.50 627.00 978.00 1378.00 7826.82
1997 1267.50 1041.50 798.50 687.50 306.50 216.00 0.00 z 40.00 165.00 612.00 793.50 1162.00 7090.00
1998 1078.28 a 791.00 805.50 600.50 331.00 158.00 10.50 48.00 135.50 612.50 827.00 1193.50 6591.28
1999 1082.50 891.50 829.50 666.00 530.50 263.28 a 119.57 c 50.50 273.10 a 628.00 785.50 1070.00 7189.95
2000 1231.00 986.00 832.00 534.44 c 420.50 209.42 d 95.00 122.00 338.79 a 642.50 1178.28 a 1320.00 7909.94
2001 1256.00 1129.50 877.82 a 676.00 392.50 302.07 a 81.00 45.95 c 180.00 654.50 769.00 1229.48 c 7593.81
2002 1122.00 970.00 955.50 620.50 470.50 191.00 66.00 87.50 265.00 745.50 873.50 1014.00 7381.00
2003 1013.50 898.50 782.50 613.50 430.00 147.50 48.50 39.00 203.00 470.00 1108.00 1156.00 6910.00
2004 1252.50 1048.00 710.00 529.50 374.50 177.50 44.00 68.00 288.00 558.00 895.50 1078.00 7023.50
2005 1223.00 903.50 752.50 578.00 314.00 247.00 43.50 69.00 324.00 563.00 974.00 1345.00 7336.50
2006 961.50 975.50 858.00 583.50 362.00 164.00 41.50 80.50 258.00 623.00 913.00 1235.50 7056.00
2007 1323.50 923.50 788.50 634.00 365.50 214.00 10.50 82.00 284.50 642.00 949.50 1205.50 7423.00
2008 1393.00 1086.00 941.50 753.50 358.50 257.50 59.00 114.00 251.00 622.50 838.50 1411.50 8086.50
2009 1323.00 1106.50 1018.00 645.52 a 370.00 166.50 41.50 64.50 158.50 742.50 890.50 1321.50 7848.52
2010 988.00 804.00 777.50 594.00 476.00 257.50 82.50 104.00 286.50 549.50 1041.00 1232.00 7192.50
2011 1249.50 1092.00 887.50 793.00 499.00 298.50 163.50 57.00 203.00 650.00 1024.00 1272.50 8189.50
2012 1245.50 993.00 900.00 596.00 473.50 284.50 58.50 77.50 228.00 640.00 879.00 1126.50 7502.00
2013 1404.50 1047.00 875.50 15.00 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 3327.00
Period of Record Statistics
MEAN 1261.67 1000.77 843.49 584.14 369.91 190.85 61.08 68.07 232.93 573.01 921.06 1193.01 7236.18
S.D. 187.79 148.34 98.10 85.48 85.38 62.60 36.56 36.08 82.61 78.88 107.01 141.02 498.15
SKEW 0.78 0.49 0.41 -0.21 0.00 0.02 1.04 0.29 0.18 -0.12 0.94 0.55 -0.17
MAX 1851.50 1499.50 1181.50 793.00 627.48 326.00 187.50 171.50 431.00 749.00 1390.50 1566.53 8229.00
MIN 894.50 674.50 630.00 348.50 174.50 49.50 2.50 2.00 78.50 336.50 686.00 918.50 6042.00
NO YRS 102 101 104 102 100 102 103 103 101 101 100 103 80