WHITE SWAN, WASHINGTON

Monthly Total Heating Degree Days

(459191)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 198107
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
1927 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 285.50 k 691.00 505.00 s 691.00
1928 1100.50 834.50 616.50 509.00 183.50 116.50 3.50 14.50 143.50 412.00 787.00 1072.50 5793.50
1929 1478.00 1211.50 621.00 546.50 296.00 98.00 17.00 27.50 198.00 372.00 876.00 967.50 6709.00
1930 1625.50 720.50 559.00 291.67 c 314.28 b 169.14 a 20.67 d 10.00 160.00 651.00 0.00 z 0.00 z 4521.75
1931 0.00 z 0.00 z 180.00 w 410.00 156.50 69.31 a 14.35 d 19.50 g 155.77 d 195.50 o 0.00 z 0.00 z 805.93
1932 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 36.00 s 142.76 a 0.00 z 394.50 k 1119.00 1261.76
1933 1001.50 0.00 z 691.09 b 368.79 a 137.50 q 92.00 13.50 18.50 262.00 320.52 c 639.11 b 678.50 4085.50
1934 793.00 496.50 g 0.00 z 127.50 f 163.50 87.00 29.00 20.15 a 207.50 333.77 a 595.00 880.50 3109.42
1935 954.00 750.50 694.50 423.00 270.50 96.00 42.50 44.50 26.00 n 427.00 886.03 a 1007.50 5596.03
1936 904.50 1142.00 147.50 y 188.50 s 146.73 a 47.50 8.00 6.72 a 137.14 b 336.02 c 916.80 e 918.50 4563.91
1937 1583.00 1014.50 606.50 467.59 a 251.62 a 94.50 10.91 d 62.00 131.38 a 83.50 u 639.50 909.00 5770.49
1938 962.50 837.93 a 673.50 371.00 255.75 c 61.00 5.68 a 30.48 a 55.50 0.00 z 845.50 930.50 5029.34
1939 923.50 854.00 624.13 a 357.00 191.50 129.11 b 26.35 a 24.50 120.00 219.00 i 487.50 k 840.00 4090.09
1940 1082.79 c 792.32 a 509.00 393.00 173.50 70.34 a 6.41 b 12.40 a 95.17 a 65.50 u 900.50 961.50 4996.94
1941 988.00 735.78 a 514.50 352.00 242.00 86.38 a 3.10 a 36.68 a 126.50 h 0.00 z 736.11 c 945.50 4640.05
1942 1229.00 775.50 632.29 b 301.00 240.00 98.50 11.88 a 29.00 70.50 284.00 g 838.50 1093.50 5319.68
1943 1321.00 784.50 711.00 358.00 332.00 149.00 36.50 39.00 67.50 398.35 a 757.78 c 1015.00 5969.63
1944 1121.50 842.50 729.00 437.07 a 227.00 76.50 20.50 11.00 95.50 252.00 0.00 z 1116.55 c 4929.12
1945 920.00 739.50 695.95 a 459.50 0.00 z 0.00 z 1.11 c 2.87 d 109.50 199.50 h 735.58 d 700.50 j 3664.00
1946 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
1947 80.50 z 722.00 559.07 b 314.50 91.40 b 93.10 a 4.50 30.50 j 8.00 o 434.00 742.50 947.29 e 3908.36
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 32.00 52.59 c 53.98 b 211.07 b 504.55 b 469.00 m 942.50 h 854.20
1949 1581.50 912.43 e 702.09 d 370.50 201.50 c 130.86 a 38.75 a 40.41 c 40.50 q 360.50 l 634.50 415.00 r 4612.55
1950 1597.05 c 994.50 729.00 530.00 307.42 a 91.00 12.92 a 5.50 103.50 480.00 775.50 890.39 d 6516.78
1951 1029.00 760.00 556.00 h 388.00 249.00 84.00 33.50 36.96 e 5.00 u 0.00 z 0.00 z 722.50 m 2580.46
1952 1294.50 832.00 677.00 359.50 168.00 81.72 a 20.67 a 19.00 62.59 a 126.00 j 442.00 m 518.50 o 3514.98
1953 711.00 660.00 637.50 481.50 300.50 151.00 8.27 a 25.00 125.69 a 345.00 640.80 e 0.00 z 4086.26
1954 1107.22 a 807.00 756.73 c 464.48 a 197.00 141.21 a 22.50 35.50 130.00 479.50 436.50 h 301.00 u 4141.14
1955 1079.00 803.19 a 822.50 587.00 336.50 96.50 74.50 35.00 0.00 z 189.00 r 980.00 1173.35 a 5987.54
1956 1112.50 1164.50 709.38 a 368.50 166.00 122.07 a 2.07 a 33.58 a 115.18 b 490.32 a 906.72 a 168.00 z 5190.82
1957 1551.15 d 845.50 380.00 n 376.03 a 114.00 73.50 35.43 c 56.26 d 76.11 c 473.50 f 258.00 u 858.18 a 3986.16
1958 882.47 a 580.00 701.63 a 467.59 a 94.50 0.00 z 0.00 q 12.18 c 167.14 b 412.50 648.50 h 771.00 f 3318.01
1959 1026.50 801.63 a 631.76 b 407.22 c 354.84 c 83.57 b 43.83 b 65.50 212.50 352.00 f 898.89 c 1037.98 a 5564.22
1960 1313.50 807.70 b 722.30 a 455.17 a 313.10 a 68.79 a 4.50 68.00 128.28 a 408.34 b 757.50 567.00 o 5047.19
1961 914.50 c 640.00 627.00 454.00 212.57 c 50.89 b 6.72 a 3.50 213.62 a 520.91 c 590.50 j 999.50 4643.21
1962 1053.00 806.00 759.50 b 346.50 343.07 a 115.71 b 50.63 a 25.12 b 94.66 a 468.21 b 0.00 z 850.90 b 4913.29
1963 1207.40 b 790.00 641.24 d 501.72 a 249.07 b 100.18 b 37.31 d 28.42 a 58.39 b 395.77 a 708.00 302.00 w 4717.50
1964 916.29 e 774.00 715.14 b 510.00 a 293.47 a 118.89 c 34.74 b 63.60 b 206.50 463.89 c 181.50 v 1276.96 e 5373.48
1965 0.00 z 0.00 z 278.50 t 358.27 d 302.00 68.57 b 29.45 a 32.03 a 221.00 0.00 z 0.00 z 0.00 z 1011.32
1966 0.00 z 0.00 z 0.00 z 0.00 z 241.69 d 159.44 c 50.12 a 33.58 a 87.86 b 451.16 c 699.11 b 864.38 a 2587.34
1967 611.00 g 661.00 678.79 b 591.50 269.00 58.97 a 14.00 3.21 b 42.50 392.84 b 735.00 b 1021.40 b 4468.21
1968 1004.40 a 725.00 575.50 507.00 e 243.00 92.50 29.50 70.50 108.00 550.50 736.50 1100.50 5742.90
1969 1396.60 b 963.00 662.88 a 450.00 a 182.38 a 53.79 a 0.50 n 51.50 136.00 497.50 727.00 971.69 b 6092.35
1970 1080.00 643.00 606.00 474.50 226.09 b 53.57 b 20.00 10.00 225.00 491.72 b 708.21 b 1074.50 5612.60
1971 860.50 707.50 767.50 455.77 d 83.50 m 182.00 60.00 9.50 h 280.00 520.00 788.33 c 1056.50 5678.10
1972 1040.00 913.00 632.00 570.50 214.00 68.00 23.25 c 24.91 c 255.00 491.72 b 753.60 e 1217.86 c 6203.84
1973 1108.25 a 784.00 a 603.00 418.50 226.50 118.45 a 27.50 65.74 b 169.66 a 485.50 838.00 872.50 5717.59
1974 1176.00 702.50 657.50 412.00 307.50 78.50 42.00 15.50 75.00 418.50 678.00 874.20 a 5437.20
1975 1008.00 889.50 738.00 528.00 235.50 80.00 5.00 45.47 a 100.00 452.00 756.00 966.00 5803.47
1976 961.00 811.00 748.00 482.50 236.00 168.10 a 27.00 i 44.50 h 51.00 440.00 732.00 1057.50 5687.10
1977 1292.50 722.50 634.50 311.11 c 325.00 32.00 22.06 e 14.50 x 202.00 434.50 787.50 909.00 5672.67
1978 979.00 741.46 b 529.50 404.50 256.00 49.50 8.50 40.00 127.80 e 406.50 910.80 e 0.00 z 4453.56
1979 1513.50 392.50 o 570.50 397.50 153.50 57.00 25.46 c 5.00 41.00 301.50 880.50 883.00 4828.46
1980 1327.50 962.00 664.00 196.50 l 184.45 a 94.44 c 23.00 44.71 e 129.50 284.00 l 334.50 q 435.50 r 3429.61
1981 420.50 p 0.00 z 363.00 j 246.00 o 0.00 z 80.50 g 37.95 b 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 37.95
Period of Record Statistics
MEAN 1135.82 817.31 659.01 430.20 234.87 93.69 23.92 31.29 137.14 435.42 773.50 982.20 5950.65
S.D. 235.65 135.00 71.63 76.39 66.62 36.15 16.97 19.54 62.57 77.84 95.30 120.59 405.77
SKEW 0.64 1.13 -0.14 0.25 -0.18 0.61 0.75 0.38 0.45 0.05 0.23 0.21 0.76
MAX 1625.50 1211.50 822.50 591.50 354.84 182.00 74.50 70.50 280.00 651.00 980.00 1276.96 6709.00
MIN 711.00 580.00 509.00 291.67 91.40 32.00 1.11 2.87 41.00 252.00 595.00 678.50 5437.20
NO YRS 45 44 43 46 47 49 49 46 46 35 37 36 10