LAKE KEECHELUS, WASHINGTON

Monthly Total Heating Degree Days

(454414)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 197708
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
1931 1061.50 983.65 e 916.50 683.00 403.50 267.00 134.00 115.50 323.00 606.50 964.50 1198.50 7657.15
1932 1207.50 1109.50 981.48 c 745.86 a 583.00 269.50 245.93 a 164.00 314.00 550.50 806.50 1169.50 8147.28
1933 1131.50 1155.50 1020.00 817.50 677.00 391.00 169.50 115.50 446.00 547.50 745.00 971.00 8187.00
1934 943.00 823.00 745.50 474.50 419.00 282.50 161.00 107.50 355.00 577.50 772.50 1005.50 6666.50
1935 1163.50 916.50 1052.50 821.00 545.00 310.00 196.50 203.00 246.00 617.50 989.50 1094.00 8155.00
1936 1080.50 1450.00 1020.50 786.50 482.00 301.50 156.00 122.50 334.00 471.50 919.00 1003.50 8127.50
1937 1581.50 1112.00 901.50 815.00 566.00 281.50 118.00 242.00 267.00 520.50 838.50 1028.00 8271.50
1938 1119.50 999.50 983.00 739.50 500.50 224.00 102.50 195.50 176.50 584.50 974.48 a 1043.50 7642.98
1939 1006.00 1061.50 981.50 687.50 504.50 415.00 181.50 126.50 325.50 611.50 779.50 947.00 7627.50
1940 1134.00 939.50 841.50 678.50 443.00 252.50 124.00 171.50 245.50 554.00 1025.00 1059.00 7468.00
1941 1095.00 915.50 795.00 591.00 508.00 331.00 73.50 147.50 437.50 612.50 810.00 1074.50 7391.00
1942 1312.00 1014.00 1023.00 693.50 576.00 424.50 128.50 125.00 262.00 565.00 989.50 1097.00 8210.00
1943 1448.50 977.00 1080.50 785.50 663.50 439.00 146.00 220.50 286.50 601.50 878.50 1134.00 8661.00
1944 1263.50 1075.50 1064.50 747.00 566.00 360.00 171.50 221.00 273.00 520.50 924.50 1238.50 8425.50
1945 1080.00 958.00 1056.00 905.00 511.50 408.50 144.50 139.50 433.00 553.00 994.50 1185.50 8369.00
1946 1135.50 1022.00 1025.50 826.00 538.50 435.00 203.50 157.00 389.50 713.50 986.50 1085.00 8517.50
1947 1233.00 963.50 873.50 668.50 406.00 391.00 230.00 233.50 306.00 640.50 860.00 1020.50 7826.00
1948 1194.00 1105.50 1065.00 892.50 691.00 263.00 233.50 200.50 399.00 676.50 927.00 1280.00 8927.50
1949 1649.00 1144.00 984.50 772.00 490.00 362.50 228.50 186.50 277.50 694.50 737.00 1083.50 8609.50
1950 1708.00 1089.00 1024.00 847.00 683.50 368.50 179.00 146.50 282.00 688.50 900.50 975.50 8892.00
1951 1191.00 1045.00 1081.50 730.00 570.50 299.00 165.50 203.00 285.50 664.00 925.50 1167.00 8327.50
1952 1337.50 1060.00 1051.50 757.50 524.50 406.00 180.50 189.50 249.50 448.00 967.50 1079.50 8251.50
1953 934.50 904.00 945.50 792.50 614.50 478.50 217.50 192.50 321.50 562.00 823.50 951.00 7737.50
1954 1241.50 958.00 1120.00 853.50 623.00 498.00 277.00 288.50 359.00 692.00 743.50 1110.00 8764.00
1955 1089.00 1037.50 1186.50 919.50 733.00 409.50 322.00 226.50 383.00 653.00 1124.50 1235.00 9319.00
1956 1230.00 1253.50 1088.00 754.00 573.00 468.10 a 171.00 185.50 353.00 694.00 959.00 1039.50 8768.60
1957 1493.00 1043.50 964.00 735.00 449.00 292.50 257.50 293.50 229.00 703.50 896.00 976.00 8332.50
1958 1036.50 809.00 958.50 737.00 338.00 208.00 64.50 87.00 368.00 579.00 967.00 1018.50 7171.00
1959 1143.00 987.50 962.50 749.50 660.00 356.50 173.50 268.00 426.50 616.00 930.00 1070.00 8343.00
1960 1240.00 1036.50 1025.00 785.50 644.50 345.50 121.50 272.00 355.00 588.50 912.00 1162.00 8488.00
1961 1075.50 875.00 935.50 807.50 596.50 224.00 149.50 85.50 440.50 696.50 1033.50 1133.00 8052.50
1962 1204.00 937.50 1018.50 704.50 657.50 388.00 248.50 244.50 321.50 605.00 837.00 1012.00 8178.50
1963 1219.00 805.00 907.00 786.00 556.50 359.50 265.50 179.50 228.50 591.00 895.50 1143.50 7936.50
1964 1066.00 1002.50 995.50 871.00 692.00 427.50 232.00 295.00 439.50 645.00 957.50 1267.50 8891.00
1965 1106.00 949.00 987.00 727.50 619.50 354.50 163.00 192.50 403.50 580.00 800.50 1134.00 8017.00
1966 1146.50 957.00 993.50 748.00 550.50 408.00 228.00 187.50 273.00 675.50 840.00 987.50 7995.00
1967 1017.00 906.50 1028.50 857.00 576.00 240.50 144.50 79.00 197.00 649.50 871.00 1127.00 7693.50
1968 1121.00 932.00 845.00 800.50 557.00 377.00 150.00 263.50 343.50 737.50 913.50 1256.00 8296.50
1969 923.00 l 1046.77 b 958.50 566.00 g 0.00 z 190.50 237.50 251.00 347.00 729.00 816.00 1064.00 5640.27
1970 1210.00 617.00 h 1004.50 888.00 610.00 263.33 c 171.50 164.00 468.50 708.50 914.00 1182.00 7584.33
1971 1128.50 987.00 1141.50 832.00 617.50 493.00 194.00 84.00 476.00 691.50 914.50 0.00 z 7559.50
1972 1165.17 b 1069.50 976.50 904.50 579.50 349.50 197.50 138.50 470.00 635.00 0.00 z 838.00 j 6485.67
1973 1206.23 c 931.50 925.50 736.50 516.00 375.00 178.50 242.50 346.00 678.00 1056.50 1034.76 b 8226.99
1974 1063.00 h 973.30 e 1044.50 844.50 733.50 335.69 a 248.00 158.10 a 289.00 595.50 849.50 1011.24 b 7082.84
1975 1152.00 1112.00 1099.50 954.50 665.00 434.00 169.00 269.91 b 331.00 0.00 z 981.00 1058.50 8226.41
1976 1129.36 b 1091.50 1120.50 883.93 b 669.60 a 467.07 a 245.00 240.52 b 306.00 645.50 840.52 a 996.00 8635.49
1977 1221.50 905.50 996.13 a 706.50 664.00 283.50 246.50 103.16 b 0.00 z 0.00 z 0.00 z 0.00 z 5126.79
Period of Record Statistics
MEAN 1192.24 1009.36 995.66 779.20 572.78 351.27 186.09 185.65 334.54 621.57 902.03 1088.84 8180.12
S.D. 164.24 114.51 87.85 89.62 91.49 80.25 54.28 61.09 75.92 67.90 88.23 89.79 521.10
SKEW 1.45 1.18 -0.55 -0.70 -0.40 -0.11 0.07 0.02 0.12 -0.38 0.07 0.44 -0.50
MAX 1708.00 1450.00 1186.50 954.50 733.50 498.00 322.00 295.00 476.00 737.50 1124.50 1280.00 9319.00
MIN 934.50 805.00 745.50 474.50 338.00 190.50 64.50 79.00 176.50 448.00 737.00 947.00 6666.50
NO YRS 45 46 47 46 46 47 47 47 46 45 45 44 40