TRINIDAD 2 SSE, WASHINGTON

Monthly Total Heating Degree Days

(458579)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 196110
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
1902 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 237.15 a 779.50 1206.00 2222.65
1903 837.00 h 1056.09 e 557.00 i 370.00 g 67.00 0.00 0.00 0.00 72.00 309.50 871.00 1078.00 3453.59
1904 1056.50 979.00 828.00 286.00 138.47 a 24.83 a 13.43 a 0.00 22.00 286.00 606.50 1004.50 5245.23
1905 1102.50 949.00 502.50 0.00 z 0.00 z 21.50 0.00 10.00 0.00 z 0.00 z 0.00 z 1145.50 3731.00
1906 1142.50 769.00 707.50 208.00 124.50 0.00 z 0.00 z 0.00 z 42.93 a 0.00 z 0.00 z 0.00 z 2994.43
1907 0.00 z 0.00 z 0.00 z 0.00 z 41.00 56.25 b 0.00 z 0.50 s 0.00 z 0.00 z 0.00 z 0.00 z 97.25
1908 841.50 876.21 a 619.00 311.00 182.50 87.86 b 3.50 16.00 73.00 371.50 616.50 1055.50 5054.07
1909 1449.00 826.50 615.02 c 474.31 a 0.00 z 0.00 z 0.00 z 0.00 65.50 345.50 595.50 g 1293.00 5068.83
1910 1222.00 1026.50 466.55 a 275.50 61.50 32.50 0.00 a 10.13 e 64.00 285.50 771.50 1008.03 b 5223.72
1911 1204.02 c 952.50 579.00 364.50 225.50 17.59 a 0.00 0.00 c 133.00 346.68 a 861.72 a 1093.00 5777.51
1912 1265.50 838.50 701.50 349.00 90.00 23.50 26.50 37.50 92.50 488.00 699.00 1004.50 5616.00
1913 1316.00 1074.50 801.50 351.50 176.50 17.00 7.20 c 6.00 71.50 434.53 b 699.50 1021.00 5976.73
1914 1008.53 a 937.46 b 568.00 296.50 89.50 76.50 0.00 0.00 b 122.00 325.50 711.00 1249.00 5384.00
1915 1246.50 817.00 506.33 a 209.00 174.50 37.76 a 2.00 0.00 d 65.00 305.00 855.00 1067.50 5285.59
1916 1500.50 1036.00 689.00 334.50 221.50 57.00 3.10 a 7.75 a 73.50 334.00 0.00 z 1243.00 5499.85
1917 1224.00 995.50 873.00 524.50 174.50 67.50 2.00 0.00 23.00 279.50 635.00 954.50 5753.00
1918 991.00 927.00 661.00 296.90 a 148.50 16.50 0.00 2.00 0.00 232.00 678.00 914.00 4866.90
1919 1041.50 867.00 581.00 264.00 125.50 19.50 0.00 0.00 46.00 384.00 795.00 1286.00 5409.50
1920 1108.00 799.00 569.50 379.50 122.00 9.00 0.00 12.00 62.50 355.00 669.50 935.50 5021.50
1921 1023.50 841.50 569.50 369.00 91.50 10.50 0.00 0.00 66.00 232.50 0.00 z 1022.00 4226.00
1922 1378.00 1088.00 734.00 352.50 154.50 0.00 0.00 0.00 27.00 209.00 732.50 1264.00 5939.50
1923 907.00 982.00 566.00 240.50 74.00 26.00 1.50 0.00 13.50 318.00 686.00 1022.00 4836.50
1924 1319.00 734.50 626.50 368.50 81.00 14.00 2.07 a 4.00 104.48 a 369.93 a 814.50 1207.28 d 5645.76
1925 1103.00 687.50 567.00 276.50 90.50 52.00 0.00 18.00 79.00 418.50 826.00 847.50 4965.50
1926 1031.50 660.50 445.50 232.50 166.50 7.50 0.00 1.50 221.00 376.13 a 699.50 1164.50 5006.63
1927 1204.35 a 836.00 655.00 431.00 239.00 17.00 5.00 14.50 126.50 411.30 c 765.00 1264.28 a 5968.94
1928 1130.50 826.50 569.50 465.50 94.00 36.00 0.00 0.00 57.50 391.50 745.00 1097.50 5413.50
1929 1470.50 1240.50 564.50 440.17 a 149.00 45.50 0.50 1.50 95.00 f 316.00 854.50 1028.00 6110.67
1930 948.50 l 784.50 504.27 a 215.50 152.00 50.17 a 1.00 0.00 77.50 452.00 812.50 1017.50 4066.94
1931 1032.00 829.50 599.50 327.00 88.00 36.50 1.00 0.00 103.50 367.87 a 831.00 1222.50 5438.37
1932 1295.80 a 1014.00 634.50 271.00 137.50 15.00 1.50 w 15.00 56.50 374.00 702.00 1102.00 5617.30
1933 1050.00 1076.50 653.50 325.50 274.50 44.50 0.00 4.50 155.00 334.50 698.28 a 886.00 5502.78
1934 910.00 672.00 484.00 223.00 174.50 35.00 4.50 1.50 178.00 328.50 642.50 966.00 4619.50
1935 1153.50 768.50 708.50 428.00 145.50 21.50 14.00 14.00 44.50 453.00 883.50 1034.88 a 5669.38
1936 1028.00 1346.50 677.50 264.50 80.00 37.50 0.00 0.50 76.00 256.50 887.00 948.50 5602.50
1937 1596.00 1087.00 597.50 409.50 148.50 55.00 0.00 23.50 71.00 269.00 681.50 892.00 5830.50
1938 990.50 902.50 653.00 319.50 150.00 32.50 1.00 0.50 15.00 353.50 822.00 1003.50 5243.50
1939 946.00 907.50 609.00 281.50 106.00 41.00 2.50 3.00 26.50 323.00 732.00 864.00 4842.00
1940 1018.00 802.50 485.00 307.50 85.50 9.00 0.00 0.00 8.00 288.00 900.50 977.50 4881.50
1941 991.00 722.50 472.00 240.50 179.50 31.50 0.00 16.50 129.50 384.00 654.50 905.50 4727.00
1942 1201.00 797.50 632.50 293.79 a 166.00 45.00 1.50 5.17 a 18.50 f 273.00 812.59 a 1065.88 a 5293.93
1943 1299.00 807.33 a 669.50 263.28 a 200.00 52.22 c 5.34 b 0.00 6.43 b 364.50 701.90 a 985.80 a 5355.30
1944 1084.50 820.00 677.35 a 344.50 100.20 c 10.18 b 0.00 0.00 40.00 131.50 729.00 1078.59 b 5015.81
1945 951.00 721.26 a 648.50 387.00 104.00 28.50 0.00 0.00 81.50 254.50 814.00 998.00 4988.26
1946 1016.50 832.00 589.00 321.00 43.50 37.00 0.00 0.00 57.50 468.50 901.50 978.50 5245.00
1947 1177.50 779.00 479.00 273.50 25.50 11.50 0.00 0.00 34.00 358.50 675.50 954.00 4768.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 8.00 7.50 1.50 91.00 386.00 777.00 1288.00 2559.00
1949 1627.50 1045.00 612.00 291.50 92.48 a 34.00 4.00 1.50 55.50 446.50 551.50 979.50 5740.98
1950 1663.00 956.50 710.50 462.00 177.50 50.50 2.00 0.00 58.00 432.00 741.50 911.00 6164.50
1951 1054.50 838.00 792.00 298.50 131.00 39.00 7.00 17.00 50.50 394.50 775.50 1212.00 5609.50
1952 1336.50 899.50 663.50 286.50 110.00 22.00 0.50 4.00 10.00 168.50 846.00 933.00 5280.00
1953 811.00 652.00 583.50 406.00 187.00 58.50 0.00 3.00 63.50 244.50 634.00 820.50 4463.50
1954 1141.00 732.00 700.50 399.00 89.00 60.50 2.50 2.58 a 51.50 408.50 568.00 983.00 5138.08
1955 1070.50 859.50 800.50 507.00 213.00 16.50 11.00 0.00 96.00 348.50 978.50 1209.50 6110.50
1956 1099.50 1170.00 701.50 235.50 87.00 47.50 0.00 2.50 43.00 351.50 815.00 981.50 5534.50
1957 1438.00 919.00 642.50 271.00 18.50 6.50 0.00 0.00 5.00 388.00 723.50 843.00 5255.00
1958 900.50 565.00 625.50 354.50 34.50 4.00 0.00 0.00 68.50 287.00 748.00 941.50 4529.00
1959 1021.00 837.50 587.00 261.00 204.00 21.50 3.00 0.00 90.00 340.50 816.00 948.00 5129.50
1960 1201.50 784.50 602.50 352.00 190.50 18.00 0.00 18.50 26.00 280.00 702.50 1053.00 5229.00
1961 943.00 636.50 567.00 337.50 137.50 5.00 0.00 0.00 71.00 368.50 0.00 z 0.00 z 3066.00
Period of Record Statistics
MEAN 1151.54 880.51 623.72 328.34 130.99 30.85 2.46 4.84 66.61 337.56 753.41 1043.15 5310.95
S.D. 197.14 153.05 93.73 77.30 57.05 20.07 4.68 7.69 43.63 74.27 92.42 127.40 423.31
SKEW 0.77 0.61 0.38 0.62 0.15 0.59 3.16 2.02 1.12 -0.37 0.04 0.47 0.07
MAX 1663.00 1346.50 873.00 524.50 274.50 87.86 26.50 37.50 221.00 488.00 978.50 1293.00 6164.50
MIN 811.00 565.00 445.50 208.00 18.50 0.00 0.00 0.00 0.00 131.50 551.50 820.50 4463.50
NO YRS 55 57 56 55 56 57 55 57 55 57 53 57 46