CHELAN, WASHINGTON

Monthly Total Heating Degree Days

(454430)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 195804
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
1891 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 6.00 10.50 116.00 347.00 0.00 z 1071.57 a 1551.07
1892 1340.50 0.00 z 610.50 503.00 213.00 46.50 13.00 1.00 83.50 424.50 0.00 z 0.00 z 3235.50
1893 1417.00 1243.93 a 950.50 542.50 237.67 a 131.00 5.34 b 9.50 190.50 562.00 886.07 b 1041.50 7217.51
1894 1253.50 1098.50 810.00 455.50 214.00 57.00 0.00 0.00 156.50 524.50 717.00 1165.00 6451.50
1895 1249.50 882.50 727.50 415.50 273.50 67.50 8.50 9.00 285.50 433.50 849.50 1027.50 6229.50
1896 1144.50 857.00 823.50 515.50 359.50 83.00 6.50 7.00 168.50 446.50 1121.00 940.50 6473.00
1897 1157.00 974.00 979.00 366.00 122.00 78.50 35.00 8.50 129.50 454.00 923.50 1217.50 6444.50
1898 1334.50 835.50 781.00 339.50 138.00 69.00 2.50 15.00 114.50 0.00 z 880.50 1286.50 5796.50
1899 1219.00 1067.50 766.50 495.00 243.50 85.00 5.00 62.50 53.00 482.50 598.39 b 1045.00 6122.89
1900 991.00 938.00 621.50 319.50 143.50 14.00 1.50 15.00 138.00 480.50 922.50 805.50 5390.50
1901 1171.28 a 959.00 712.48 a 0.00 z 199.00 122.00 3.50 1.00 181.50 289.50 710.17 a 999.00 5348.44
1902 1138.50 892.50 739.50 488.50 194.00 81.50 42.62 c 14.50 157.00 348.00 838.00 1204.00 6138.62
1903 1178.00 609.50 k 866.00 495.00 224.00 25.00 29.50 19.00 162.00 443.41 c 871.03 a 1242.50 5555.45
1904 1169.50 1051.50 922.00 425.50 226.00 56.50 6.50 2.00 56.00 474.30 a 715.50 1004.83 b 6110.13
1905 1109.05 b 1007.48 a 643.77 a 385.50 234.00 67.00 3.50 20.00 88.50 591.00 811.00 1085.00 6045.80
1906 1126.50 840.00 788.00 301.00 191.00 106.00 0.00 6.00 90.50 320.00 747.50 1052.00 5568.50
1907 1559.50 973.50 812.50 469.50 129.00 75.50 1.00 12.00 o 98.00 248.00 711.50 1000.78 a 6078.78
1908 1100.50 1017.50 718.50 408.00 260.00 49.00 0.00 26.00 106.50 432.00 682.00 1113.50 5913.50
1909 1472.50 b 952.00 734.18 a 463.50 210.50 31.50 8.50 6.00 83.50 428.00 791.00 1300.50 6481.68
1910 1244.00 1125.50 615.50 373.00 92.50 f 61.00 3.50 43.00 112.00 380.00 808.50 1029.50 5795.50
1911 1301.00 1049.50 682.00 427.00 282.00 38.00 3.00 0.00 185.17 a 442.00 920.89 b 1152.34 b 6482.91
1912 1286.00 912.50 778.50 415.50 125.00 37.00 11.00 36.50 150.50 516.00 745.50 1011.00 6025.00
1913 1310.50 1129.00 847.50 417.00 221.50 24.00 12.50 9.50 89.50 533.00 758.00 1033.00 6385.00
1914 1052.50 1001.50 677.00 368.00 120.50 81.50 0.00 0.00 164.50 387.00 759.50 1287.00 5899.00
1915 1260.00 860.00 607.50 271.50 222.00 31.55 a 4.00 0.00 77.50 378.50 907.00 1160.00 5779.55
1916 1580.00 1082.00 809.00 402.00 263.00 95.50 22.50 10.50 87.00 435.50 918.00 1294.00 6999.00
1917 1316.00 1066.50 942.50 568.50 208.50 60.50 4.00 0.00 46.00 338.50 672.50 1030.00 6253.50
1918 1041.50 994.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 359.17 b 787.76 a 1005.29 c 4188.22
1919 385.00 s 1005.00 802.00 425.69 a 284.17 a 82.50 b 7.75 c 2.38 e 163.45 a 525.97 a 894.00 752.00 k 4192.91
1920 1172.50 858.00 0.00 z 0.00 z 0.00 z 49.00 i 1.72 d 34.74 b 129.50 f 545.37 d 801.00 e 1030.20 c 4443.53
1921 1163.02 a 961.00 744.00 a 515.77 d 86.50 k 0.00 z 0.00 z 0.00 z 218.57 b 237.50 k 881.00 1017.00 f 4483.36
1922 1466.50 1236.50 890.50 411.50 g 272.44 e 6.50 0.00 d 4.81 b 60.00 e 256.00 i 0.00 z 0.00 z 3937.25
1923 0.00 z 1135.56 a 758.47 a 270.50 g 165.50 56.50 5.00 0.00 51.50 395.52 b 745.96 d 1103.60 a 4417.60
1924 1327.00 811.00 681.00 427.00 81.12 a 25.00 0.00 1.50 106.00 410.50 843.50 1260.00 5973.62
1925 1131.50 758.50 644.00 346.50 119.50 59.50 0.00 21.50 86.00 440.00 815.50 888.50 5311.00
1926 1110.50 732.50 528.50 302.00 174.00 14.50 0.00 3.00 238.50 390.00 693.50 1142.50 5329.50
1927 1223.00 916.50 741.00 472.50 249.00 1.00 0.00 6.00 129.00 457.50 827.00 1285.50 6308.00
1928 1132.50 858.50 658.00 503.50 128.00 37.00 1.00 6.00 69.00 433.00 756.50 1141.00 5724.00
1929 1491.00 1205.50 672.50 504.00 196.50 60.50 2.50 3.50 144.00 372.50 842.00 1062.27 a 6556.77
1930 1584.50 856.00 649.50 303.00 201.50 62.00 0.00 0.00 94.00 500.00 867.00 1121.00 6238.50
1931 1049.00 897.04 a 711.00 391.50 144.67 a 40.50 0.00 0.00 113.57 b 392.09 d 884.50 1202.00 5825.87
1932 1314.50 1052.80 a 745.50 360.58 d 194.00 27.93 a 8.00 f 11.88 a 97.00 413.50 711.50 1142.98 d 6072.18
1933 1084.47 b 1148.56 c 738.66 b 426.00 327.00 61.50 0.50 8.78 a 194.50 400.00 719.00 941.50 6050.46
1934 777.00 f 755.46 b 561.00 242.07 a 170.50 b 20.00 c 10.00 f 4.98 c 240.60 e 350.54 e 677.14 b 1031.00 4053.29
1935 1218.09 b 871.50 792.50 504.50 192.50 51.50 f 24.00 20.84 b 81.50 512.02 a 948.75 b 664.50 l 5166.20
1936 1115.00 1460.88 a 796.70 a 360.00 134.69 b 64.66 a 1.50 4.00 128.57 b 404.00 954.00 1055.50 6479.49
1937 1666.00 1147.50 782.00 530.00 226.50 103.00 1.00 33.50 87.00 344.50 815.00 c 1045.00 6781.00
1938 1165.00 985.50 786.50 399.00 180.50 47.50 7.00 3.00 43.50 415.00 852.00 1084.50 5969.00
1939 1020.00 1022.00 731.50 375.00 167.50 67.00 0.50 2.07 a 58.00 398.50 733.00 878.50 5453.57
1940 1072.94 d 903.00 605.57 b 383.50 135.62 c 8.50 2.67 b 0.00 42.50 401.85 d 963.00 1017.50 5536.66
1941 1187.30 a 808.00 568.16 b 305.50 192.00 50.00 0.00 29.00 198.50 408.50 675.50 985.28 a 5407.74
1942 1214.68 a 887.50 715.50 380.00 273.50 90.00 4.50 11.50 40.34 a 396.50 896.50 1097.92 a 6008.45
1943 1428.67 b 879.00 772.50 344.50 271.00 86.00 9.00 2.67 b 34.50 422.52 d 763.50 1059.68 a 6073.55
1944 1140.50 921.00 731.50 382.50 153.50 43.50 2.50 2.50 116.90 a 360.50 846.00 1188.50 5889.40
1945 1081.50 819.78 a 742.45 a 494.48 a 212.00 67.76 a 6.20 a 1.03 a 159.83 a 390.60 a 889.00 1094.50 5959.13
1946 1198.09 d 1013.83 d 583.50 h 380.00 g 88.50 81.00 1.00 3.50 141.00 570.00 1006.00 1149.50 5252.43
1947 1302.00 950.00 656.50 362.50 89.50 72.00 13.50 15.00 116.50 508.50 830.00 747.50 j 4916.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 43.00 30.00 36.68 a 184.00 568.50 867.00 1382.50 3111.68
1949 1712.00 1255.50 819.43 a 404.50 131.00 67.50 8.50 11.00 124.50 505.00 668.50 1108.50 6815.93
1950 1746.00 1048.50 847.50 563.50 299.50 88.50 5.50 0.00 68.50 546.00 845.00 997.50 7056.00
1951 1148.50 978.00 928.00 443.50 241.50 64.00 16.50 31.00 112.00 502.50 888.00 1306.00 6659.50
1952 1401.00 1021.50 819.00 438.00 187.00 67.00 9.00 12.50 37.50 289.50 858.00 970.50 6110.50
1953 851.00 731.50 654.00 486.50 248.00 119.50 3.50 15.50 105.50 374.50 688.00 877.50 5155.00
1954 1237.00 837.00 820.47 a 582.00 204.00 119.00 22.00 33.00 108.00 500.50 626.00 1046.50 6135.47
1955 1127.00 981.50 939.00 585.50 312.50 55.50 38.50 0.00 137.00 465.50 1064.00 1240.00 6946.00
1956 1129.00 1256.50 865.00 399.00 134.50 96.50 3.00 10.00 86.50 447.00 884.50 1044.00 6355.50
1957 1520.00 1059.50 796.50 415.00 74.00 32.50 4.50 6.00 63.50 513.50 800.00 937.00 6222.00
1958 1015.50 695.00 731.50 469.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2911.50
Period of Record Statistics
MEAN 1245.56 977.09 752.28 424.33 198.56 60.70 7.49 11.33 117.73 433.92 818.35 1090.54 6140.48
S.D. 183.99 147.32 101.45 79.30 63.86 29.77 9.97 12.94 54.78 74.62 103.59 121.10 479.63
SKEW 0.84 0.62 0.10 0.03 0.14 0.17 1.97 1.65 0.72 0.01 0.28 0.23 0.08
MAX 1746.00 1460.88 979.00 585.50 359.50 131.00 42.62 62.50 285.50 591.00 1121.00 1382.50 7217.51
MIN 851.00 695.00 528.50 242.07 74.00 1.00 0.00 0.00 34.50 248.00 598.39 805.50 5155.00
NO YRS 63 64 63 60 61 62 63 64 65 64 64 61 48