DAVENPORT, WASHINGTON

Monthly Total Heating Degree Days

(452007)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 17.00 x 95.00 76.00 259.00 571.43 a 931.50 1439.95 a 3372.88
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 961.50 975.50 864.00 589.00 362.00 156.43 b 26.50 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3908.43
Period of Record Statistics
MEAN 1246.51 973.79 848.64 595.65 376.63 189.62 66.93 71.15 228.04 585.02 923.38 1194.63 7246.70
S.D. 195.35 129.53 85.01 72.69 80.11 62.56 35.39 38.57 85.79 72.32 123.25 149.93 469.01
SKEW 0.87 0.09 0.40 -0.08 -0.15 0.17 0.83 0.19 0.32 -0.15 1.13 0.67 -0.17
MAX 1851.50 1282.00 1060.00 732.50 530.50 311.00 187.50 171.50 431.00 749.00 1390.50 1566.53 8229.00
MIN 894.50 674.50 683.50 454.50 174.50 55.50 3.00 3.50 79.00 409.50 686.00 972.00 6042.00
NO YRS 56 55 56 55 53 54 57 57 55 55 54 56 40