ROSS DAM, WASHINGTON

Monthly Total Heating Degree Days

(457185)

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
1960 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 172.00 447.50 800.50 903.28 b 2323.28
1961 889.00 763.00 768.50 600.00 395.50 112.50 62.00 21.00 279.00 588.00 857.50 989.00 6325.00
1962 1014.50 787.00 872.00 525.50 516.50 157.00 n 73.50 t 48.50 t 174.50 451.50 685.50 858.50 5885.50
1963 1105.00 693.50 761.50 596.50 337.00 227.00 120.00 46.50 105.50 430.50 771.50 906.75 a 6101.25
1964 913.00 807.00 845.50 655.00 470.50 226.50 120.50 162.00 256.50 463.00 768.62 a 862.00 i 5688.12
1965 813.00 f 813.00 814.00 549.50 433.00 177.50 61.00 91.00 229.50 423.00 656.00 957.00 5204.50
1966 1005.00 807.00 794.00 549.00 354.00 233.50 102.00 64.50 133.00 519.00 715.00 847.50 6123.50
1967 917.00 766.00 850.00 628.00 375.00 113.00 61.00 15.50 64.82 b 502.72 a 678.00 964.00 5935.04
1968 1004.00 766.50 726.00 646.67 c 360.00 244.00 29.00 g 127.50 3.50 z 437.00 h 710.00 c 1104.50 5689.17
1969 1330.00 891.50 764.00 580.00 245.00 100.50 97.50 94.00 229.29 b 351.50 h 645.56 c 853.03 b 5830.38
1970 993.15 d 710.77 b 748.50 671.00 361.00 116.00 71.00 37.00 302.00 529.50 761.50 1001.00 6302.42
1971 1054.50 814.50 915.00 634.00 341.00 298.50 126.58 a 14.00 282.00 552.00 773.50 1089.50 6895.08
1972 1141.50 894.00 791.50 686.50 340.50 238.50 87.00 54.50 346.00 486.00 728.50 1064.50 6859.00
1973 1051.50 765.00 747.50 535.50 346.68 a 254.00 79.00 108.00 146.00 533.50 859.50 851.50 6277.68
1974 1026.50 786.00 813.50 585.52 a 485.67 a 182.59 a 109.02 a 49.50 101.00 392.50 705.00 845.00 6081.79
1975 993.50 957.00 856.00 662.50 408.00 228.00 50.00 161.00 118.50 528.79 e 878.65 d 909.50 6751.44
1976 929.00 861.50 894.87 a 605.00 399.50 267.41 a 120.00 132.00 122.50 436.00 662.00 809.50 6239.28
1977 992.00 a 683.08 d 805.00 490.00 431.86 b 114.83 a 123.00 80.00 239.48 a 498.07 a 882.41 a 995.50 6335.24
1978 985.00 760.48 c 683.00 557.07 a 406.62 a 124.04 d 35.00 l 104.50 305.89 b 430.50 863.89 c 1023.53 b 6244.52
1979 1174.79 b 900.50 723.16 b 577.50 325.50 178.97 a 86.05 b 29.50 147.12 d 391.50 737.68 b 849.83 b 6122.09
1980 1141.32 a 825.46 a 816.50 463.50 348.00 229.14 a 71.41 c 126.07 a 221.38 a 410.50 707.68 b 888.00 6248.95
1981 787.50 760.50 642.00 571.67 c 346.17 a 315.50 66.50 g 44.29 c 189.00 e 517.38 b 669.50 750.50 f 4843.50
1982 1036.50 875.50 766.00 675.00 392.00 117.00 146.50 95.00 182.50 521.50 861.00 931.50 6600.00
1983 838.50 719.50 659.50 506.00 277.50 209.50 155.00 38.00 294.50 512.00 709.00 1176.50 6095.50
1984 901.00 785.00 662.00 0.00 z 503.50 234.00 69.00 62.50 288.00 583.50 822.00 1091.00 6001.50
1985 994.00 901.50 778.50 579.00 341.00 167.50 6.50 71.50 290.00 580.00 1127.00 1035.50 6872.00
1986 853.50 867.00 660.00 599.50 384.40 a 117.00 141.50 5.00 237.50 369.50 774.00 936.50 5945.40
1987 972.00 730.00 700.00 457.00 305.00 149.50 60.50 55.50 124.50 334.50 621.50 969.50 5479.50
1988 1025.50 808.00 757.00 517.00 352.50 213.00 99.50 60.50 235.50 362.00 757.50 905.50 6093.50
1989 958.00 1052.50 845.00 472.00 380.50 129.50 81.50 71.00 103.00 478.00 702.00 819.00 6092.00
1990 911.00 933.50 722.00 458.50 365.00 219.50 43.00 40.50 66.50 612.00 727.00 1183.50 6282.00
1991 1084.00 715.00 823.50 558.50 393.50 245.00 53.50 76.00 112.00 460.50 720.50 848.50 6090.50
1992 892.50 719.00 526.00 452.00 231.00 90.50 65.00 44.50 278.00 438.50 741.50 1042.00 5520.50
1993 1227.00 0.00 z 699.00 570.50 213.50 212.00 161.50 77.50 162.50 379.00 849.00 899.50 5451.00
1994 789.50 883.00 709.00 440.50 257.00 201.50 44.00 28.50 89.50 490.00 907.00 994.00 5833.50
1995 964.50 772.50 761.00 525.50 215.00 151.00 52.50 160.50 69.00 544.00 701.50 939.50 5856.50
1996 1044.50 902.50 762.00 547.50 484.50 195.50 74.00 63.00 253.50 543.50 848.00 1124.00 6842.50
1997 1021.00 818.00 821.00 587.00 312.50 231.50 99.50 29.00 170.00 537.50 674.50 893.00 6194.50
1998 1003.50 708.50 712.00 514.00 309.50 121.00 25.50 29.50 80.50 458.00 703.00 1000.50 5665.50
1999 900.50 831.00 818.00 611.00 466.50 280.50 107.50 53.00 191.00 513.50 698.00 891.50 6362.00
2000 978.50 819.00 766.00 484.00 391.00 201.00 86.50 85.50 214.66 a 483.50 809.48 a 976.00 6295.14
2001 872.00 840.00 a 722.50 580.50 372.50 227.00 56.00 56.50 143.50 551.50 706.50 961.50 6090.00
2002 945.00 839.50 941.50 583.00 423.00 158.00 71.50 42.00 168.50 467.00 689.50 860.00 6188.50
2003 840.50 748.00 780.00 575.00 349.50 119.00 26.50 10.00 139.00 420.50 877.00 915.00 5800.00
2004 1024.00 761.50 697.00 413.50 286.50 128.00 30.00 57.00 269.00 458.50 723.50 848.00 5696.50
2005 997.00 762.00 671.50 493.00 223.50 208.00 48.00 30.00 194.50 463.50 788.00 927.00 5806.00
2006 858.00 855.00 782.00 522.00 336.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3353.00
Period of Record Statistics
MEAN 986.22 810.23 764.65 557.59 360.73 188.82 81.75 66.01 189.38 479.40 762.09 951.81 6174.98
S.D. 109.73 77.02 78.63 68.03 74.82 58.63 37.04 40.70 76.20 65.43 92.51 95.65 363.95
SKEW 0.70 0.71 -0.27 -0.09 -0.04 0.05 0.29 0.84 0.11 -0.13 1.43 0.69 0.33
MAX 1330.00 1052.50 941.50 686.50 516.50 315.50 161.50 162.00 346.00 612.00 1127.00 1183.50 6895.08
MIN 787.50 683.08 526.00 413.50 213.50 90.50 6.50 5.00 64.82 334.50 621.50 809.50 5479.50
NO YRS 45 45 46 45 46 44 41 44 45 44 46 44 36