BOUNDARY DAM, WASHINGTON

Monthly Total Heating Degree Days

(450844)

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
1965 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 33.77 c 53.50 352.50 503.75 a 845.00 1095.00 2883.52
1966 1169.14 c 920.00 866.50 593.57 b 244.50 207.50 49.82 c 81.12 a 115.00 602.00 875.00 1015.00 6739.15
1967 1104.00 898.00 909.00 671.00 361.50 79.00 27.50 9.00 83.50 616.90 a 905.50 1254.50 6919.40
1968 1233.50 1011.00 818.50 442.00 i 465.52 a 235.00 63.50 108.00 263.50 669.00 898.00 1290.00 7055.52
1969 1523.00 1042.50 890.00 536.50 f 383.00 148.00 111.00 85.50 239.00 660.00 856.00 1112.50 7050.50
1970 1278.50 904.00 927.00 701.00 419.53 a 183.00 52.00 29.50 396.50 664.50 970.50 0.00 z 6526.03
1971 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
1972 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
1973 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
1974 0.00 z 0.00 z 0.00 z 618.00 527.50 190.86 a 97.00 57.00 g 209.50 577.50 856.50 1062.27 a 4139.13
1975 1309.00 1116.00 987.50 725.00 465.52 a 282.50 23.00 n 130.00 213.50 616.56 d 943.85 d 0.00 z 6789.42
1976 1169.00 1016.12 c 1045.22 a 687.86 b 432.45 a 336.00 96.00 120.50 152.00 597.27 a 929.50 1155.50 7737.41
1977 1410.50 d 936.00 888.50 533.79 a 439.88 b 112.50 75.00 56.00 359.00 647.50 1031.00 1309.00 7798.67
1978 1269.00 941.50 870.50 600.00 482.00 222.86 b 41.00 134.50 274.50 0.00 z 1058.00 1413.27 c 7307.12
1979 1681.23 a 1107.50 609.50 k 639.11 b 406.00 209.50 82.15 a 6.20 a 166.00 534.00 1000.00 1022.50 6854.19
1980 1430.00 1034.50 925.50 494.50 315.50 244.14 a 79.50 140.50 278.50 542.00 881.00 1077.00 7442.64
1981 1053.50 952.50 756.00 637.00 384.50 323.28 a 109.50 29.00 248.50 658.50 817.50 1169.00 7138.78
1982 1309.50 1060.50 899.00 719.00 465.50 161.00 122.00 75.50 242.00 614.00 1029.00 1227.50 7924.50
1983 1101.00 514.50 m 765.00 584.00 372.00 211.00 162.50 27.50 375.50 655.50 818.00 1514.50 6586.50
1984 1221.50 987.00 835.00 608.00 551.00 320.50 94.50 74.00 412.00 715.00 982.00 1453.00 8253.50
1985 1340.00 1167.00 970.00 627.41 a 344.00 170.50 0.50 102.50 407.00 727.47 a 1294.00 1333.50 8483.88
1986 1139.50 1046.50 796.50 627.50 378.50 86.00 127.00 6.50 372.00 558.00 950.00 1197.00 7285.00
1987 1264.50 908.50 796.50 464.00 260.50 107.00 47.50 69.50 159.50 593.00 780.00 1169.00 6619.50
1988 1295.00 1033.50 815.50 470.50 321.00 158.50 84.50 42.50 274.50 498.50 848.00 1195.00 7037.00
1989 1200.50 1233.00 925.50 534.50 372.50 76.00 49.50 96.00 219.50 620.50 876.50 1080.00 7284.00
1990 1075.00 1062.50 820.50 480.00 402.50 259.50 31.00 56.50 123.50 683.50 841.50 1421.00 7257.00
1991 1405.50 819.50 924.50 583.00 422.00 232.50 38.00 30.00 198.50 664.00 957.50 1112.00 7387.00
1992 1055.50 851.00 662.50 504.50 262.00 62.50 55.00 86.00 324.00 568.50 909.00 1357.50 6698.00
1993 1455.00 1101.00 916.50 614.50 205.50 180.50 153.00 86.50 268.00 554.00 1095.00 1163.50 7793.00
1994 1038.50 1074.00 813.50 488.00 299.00 206.00 26.50 46.50 152.00 605.50 1020.50 1187.50 6957.50
1995 1233.00 948.00 908.00 618.50 292.00 144.50 40.50 140.00 167.00 674.00 919.50 1152.00 7237.00
1996 1304.00 1158.50 935.00 593.50 484.50 205.00 39.00 66.00 334.50 667.00 991.00 1322.00 8100.00
1997 1244.50 999.50 935.50 699.50 396.00 227.00 53.50 41.00 206.50 592.50 893.50 1125.00 7414.00
1998 1175.50 857.50 801.50 548.50 254.00 131.50 6.50 28.50 107.50 617.50 811.50 1210.00 6550.00
1999 1076.50 919.50 849.00 631.50 450.50 258.50 122.50 32.50 309.00 648.50 791.00 1073.00 7162.00
2000 1199.50 1010.50 858.00 538.00 421.60 a 170.50 61.50 65.50 322.00 625.50 1066.00 1272.50 7611.10
2001 1161.50 1047.50 851.00 655.00 350.50 223.00 55.00 34.50 142.00 683.00 793.00 1165.50 7161.50
2002 1179.00 1014.50 1024.50 625.00 449.00 192.50 61.00 72.00 250.50 721.00 939.00 1031.50 7559.50
2003 1062.50 959.50 866.00 576.50 382.50 134.00 24.00 12.50 256.00 524.42 a 1091.50 1216.00 7105.42
2004 1188.50 970.00 777.50 503.00 343.50 174.00 34.00 53.50 303.00 611.00 935.50 1100.00 6993.50
2005 1312.00 1018.00 834.00 597.00 311.00 229.50 49.50 65.50 343.50 610.50 946.50 1361.50 7678.50
2006 1022.00 1100.50 929.00 587.50 380.55 b 153.33 c 3.50 o 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4172.89
Period of Record Statistics
MEAN 1234.86 1006.31 872.05 593.87 381.55 190.76 66.38 64.71 253.18 619.51 932.80 1205.99 7356.15
S.D. 146.07 93.34 78.41 71.65 80.59 67.31 39.05 38.24 90.68 58.33 104.95 128.57 482.42
SKEW 0.86 0.18 -0.13 -0.11 -0.15 0.14 0.69 0.41 -0.01 -0.22 1.07 0.59 0.43
MAX 1681.23 1233.00 1045.22 725.00 551.00 336.00 162.50 140.50 412.00 727.47 1294.00 1514.50 8483.88
MIN 1022.00 819.50 662.50 464.00 205.50 62.50 0.50 6.20 83.50 498.50 780.00 1015.00 6550.00
NO YRS 37 36 36 36 38 38 37 37 38 37 38 36 29