STEVENS PASS, WASHINGTON

Monthly Total Heating Degree Days

(458089)

Base Temperature = 65 F

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 199404
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
1950 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 169.00 z 1064.50 1065.88 a 2130.38
1951 1340.50 1091.00 1187.00 747.50 562.00 f 119.50 r 159.50 o 237.50 k 385.71 b 814.00 1070.00 c 1323.00 7958.71
1952 1409.50 1112.50 1103.00 787.76 a 495.50 i 560.00 250.58 a 311.19 e 345.00 d 470.88 b 1032.86 b 1215.50 8598.77
1953 1018.00 1005.41 a 1065.22 b 691.50 g 510.50 j 453.00 j 330.48 c 294.50 b 413.79 a 656.54 c 961.73 d 1101.61 c 6847.28
1954 1365.07 b 1012.85 b 748.50 l 603.00 l 532.50 g 118.00 x 359.50 f 458.44 e 356.50 g 617.00 f 616.50 h 1217.04 d 4053.39
1955 921.00 g 877.00 g 1256.65 d 981.35 d 600.00 h 555.00 e 344.50 g 137.00 q 337.00 j 561.50 h 796.50 m 0.00 z 2792.99
1956 1334.50 1305.00 1151.00 578.00 g 0.00 z 0.00 z 0.00 z 0.00 z 324.00 g 641.50 g 1058.00 1141.00 5989.50
1957 1533.50 1101.33 a 1068.50 831.50 550.00 448.00 381.00 386.50 281.50 816.00 980.50 1117.50 9495.83
1958 1197.00 939.00 1098.00 877.50 463.50 346.00 111.00 179.28 a 518.00 653.00 1129.50 1114.00 8625.78
1959 1292.00 1119.00 1109.50 869.50 775.00 500.50 260.40 a 370.97 a 343.00 n 750.00 1045.50 1212.50 9304.87
1960 1348.00 1148.50 1062.00 858.00 789.50 493.00 203.00 403.50 455.00 694.00 1050.50 1253.00 9758.00
1961 1177.00 1007.00 1073.00 940.50 731.00 317.00 232.50 144.00 570.00 830.50 1154.50 1257.50 9434.50
1962 1272.50 1039.50 1155.00 808.00 824.00 510.50 338.00 351.50 416.50 728.00 1011.00 1131.00 9585.50
1963 1385.50 864.00 1062.00 946.50 689.00 511.00 419.50 274.00 314.00 724.00 1059.00 1206.50 9455.00
1964 1225.00 1089.00 1152.00 1013.00 824.50 566.50 338.00 439.50 585.00 741.50 1084.50 1400.68 a 10459.18
1965 1218.50 1058.50 1073.00 824.00 764.00 489.00 209.50 325.50 522.00 656.50 947.00 1272.00 9359.50
1966 1247.00 1059.50 1072.00 828.50 698.00 562.00 364.00 300.50 371.00 767.50 994.50 1118.00 9382.50
1967 1153.00 1022.00 1179.00 977.50 753.50 410.00 222.00 134.50 268.50 801.00 984.50 1231.00 9136.50
1968 1253.50 958.50 987.50 959.50 701.50 497.00 218.00 368.00 0.00 z 0.00 z 539.50 o 1439.78 d 7383.28
1969 1596.50 1158.50 1023.00 917.50 569.50 197.00 170.50 91.97 a 404.00 0.00 z 434.50 r 1228.00 7356.47
1970 1322.50 979.00 1089.00 1010.00 664.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 736.00 l 1332.50 6397.50
1971 1232.00 1048.00 1257.50 628.50 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1056.50 1359.50 5953.50
1972 1384.15 a 1157.00 1074.00 1062.93 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 637.50 l 1389.00 6067.08
1973 1359.50 1009.50 1071.00 887.07 a 692.00 541.00 316.89 d 269.50 f 472.00 827.04 c 1218.89 c 1164.57 a 9559.45
1974 1400.50 1068.67 a 1135.00 949.00 863.00 527.78 c 413.00 291.52 e 331.07 b 655.00 1032.00 1169.00 9835.54
1975 1295.00 1191.00 1195.50 1033.00 804.00 636.96 b 265.00 365.00 f 395.00 857.31 b 1112.00 1194.00 9978.78
1976 1178.50 1132.50 1209.53 b 943.85 d 754.85 a 666.72 a 384.92 a 408.50 366.00 714.50 920.69 a 1054.52 a 9735.08
1977 1264.28 a 980.50 1139.50 799.66 a 817.50 398.50 380.55 b 173.71 b 611.11 c 583.00 h 1173.75 b 1257.57 a 8996.62
1978 1216.23 a 1038.50 983.50 657.50 i 559.00 h 395.19 d 323.78 d 265.00 i 619.62 d 679.42 a 1144.29 b 1418.80 c 7819.32
1979 1543.00 1153.70 a 997.00 900.00 a 477.50 h 504.23 d 301.22 a 287.04 d 364.80 e 510.00 f 794.00 i 1125.82 a 7176.80
1980 1438.50 1154.00 1127.50 815.00 717.50 608.08 d 281.67 b 227.50 k 345.50 i 722.09 b 663.00 j 860.00 f 6864.34
1981 1095.00 1037.50 965.50 918.62 a 461.50 l 619.00 399.56 d 177.50 f 469.29 b 789.95 c 723.50 f 1239.50 7533.91
1982 1276.00 1147.00 1108.00 1000.00 753.50 424.00 359.00 106.50 p 460.00 518.00 k 633.50 n 830.00 j 6527.50
1983 1094.00 1006.50 976.50 845.50 626.72 a 511.00 204.00 o 265.50 408.00 i 772.50 642.50 k 1508.50 7606.72
1984 1134.50 1036.00 983.50 948.00 844.00 597.41 a 241.00 294.50 602.50 908.30 a 1124.50 1375.00 10089.21
1985 1355.50 1177.00 1095.50 857.00 701.50 476.50 57.00 p 337.00 602.00 856.50 1442.50 1309.75 c 10210.75
1986 0.00 z 1072.00 918.50 672.50 i 722.00 389.00 304.50 k 35.50 u 583.00 613.00 1005.00 1283.00 6585.50
1987 1279.50 995.50 1023.00 784.00 646.00 397.50 355.47 a 318.50 217.50 k 587.00 947.50 1330.50 8664.47
1988 1310.00 1064.50 1060.50 888.50 751.50 536.00 172.00 k 198.50 j 318.00 o 557.50 1059.00 1179.00 8406.50
1989 1194.00 1311.00 1158.50 810.00 740.00 428.00 385.00 377.00 395.50 780.50 435.50 q 1119.00 8698.50
1990 1179.00 1142.00 994.00 752.00 789.00 545.50 73.50 r 222.50 346.55 a 889.50 520.00 o 1407.00 8267.05
1991 1271.00 882.00 1111.50 907.00 784.50 599.50 207.00 i 251.00 245.50 l 743.00 675.00 j 1143.50 7693.00
1992 1188.50 977.50 866.50 796.50 527.50 130.50 l 303.00 139.00 n 529.50 738.50 581.00 m 1306.13 a 7233.63
1993 1423.00 1161.50 1042.50 903.00 513.00 541.50 228.50 r 318.50 277.00 k 595.72 a 618.00 l 870.00 i 6498.72
1994 1030.50 1128.00 979.50 809.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3947.50
Period of Record Statistics
MEAN 1281.70 1073.06 1080.00 889.16 713.92 494.45 302.02 299.25 448.20 730.96 1066.60 1242.79 9565.55
S.D. 128.03 94.04 85.27 82.17 100.65 98.39 79.32 92.63 106.80 100.67 103.60 112.86 446.23
SKEW 0.25 0.25 -0.10 0.20 -0.87 -0.79 -0.45 -0.48 0.18 -0.46 1.69 0.37 -0.04
MAX 1596.50 1311.00 1257.50 1062.93 863.00 666.72 419.50 458.44 619.62 908.30 1442.50 1508.50 10459.18
MIN 1018.00 864.00 866.50 747.50 463.50 197.00 111.00 91.97 268.50 470.88 920.69 1054.52 8625.78
NO YRS 42 43 43 38 32 35 29 28 29 32 28 40 13