SEWARD, ALASKA

Monthly Total Heating Degree Days

(508371)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1949 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 444.83 a 740.50 911.00 1357.00 3453.33
1950 1221.50 1267.50 946.50 834.50 683.00 423.50 318.50 227.00 488.50 799.00 1217.00 1257.50 9684.00
1951 1446.00 1085.50 1272.00 827.50 637.50 474.00 186.00 288.50 448.50 831.50 951.00 1275.50 9723.50
1952 1430.00 1048.50 1056.00 889.50 668.50 401.50 324.50 261.00 435.00 706.91 c 856.00 1135.50 9212.91
1953 1351.50 1041.50 1106.50 792.00 633.00 290.69 a 220.00 280.50 491.00 834.50 990.00 1098.00 9129.19
1954 1250.00 1313.50 1043.00 845.00 617.00 401.00 266.00 299.00 393.50 717.00 906.50 1455.50 9507.00
1955 1101.00 1054.50 1065.00 910.00 688.50 532.00 283.50 333.50 489.50 885.00 1226.00 1342.00 9910.50
1956 1410.50 1269.50 1167.00 863.50 730.50 478.00 285.00 312.50 505.00 874.00 1137.00 1371.50 10404.00
1957 1243.50 1027.00 916.00 740.50 536.00 272.00 236.50 185.00 425.00 654.50 820.50 1365.00 8421.50
1958 1110.50 931.50 935.50 695.00 596.00 371.50 327.50 330.00 488.50 876.00 1052.50 1110.50 8825.00
1959 1303.00 935.50 1260.50 824.00 546.00 269.50 345.00 233.00 450.00 777.50 928.50 1176.50 9049.00
1960 1204.00 896.00 1095.50 856.50 546.50 341.00 271.00 302.00 504.50 721.00 983.00 959.50 8680.50
1961 1096.50 1076.50 1238.00 806.50 561.21 b 351.50 301.00 341.50 447.00 882.00 1107.50 1492.50 9701.71
1962 1197.50 977.50 1136.00 732.50 648.50 413.00 277.50 249.00 496.00 740.00 984.00 1161.00 9012.50
1963 1126.00 934.50 1055.00 821.00 543.00 423.00 225.00 236.50 358.00 705.00 1239.00 952.00 8618.00
1964 806.00 i 1113.00 1182.00 836.50 646.00 355.50 281.00 306.00 423.00 745.00 1013.00 1482.00 8383.00
1965 1301.00 1195.50 870.50 708.00 704.00 528.00 333.50 306.50 396.00 865.00 1024.00 1288.00 9520.00
1966 1252.50 1098.00 1274.00 779.00 659.50 375.00 268.00 363.50 456.50 902.00 1029.00 1223.50 9680.50
1967 1302.50 1105.50 1024.50 764.00 533.00 361.50 227.50 286.50 482.00 745.00 937.00 1270.00 9039.00
1968 1339.00 1048.00 976.00 838.00 527.00 338.00 207.00 194.50 447.00 822.50 961.50 1399.00 9097.50
1969 1499.50 1075.50 1002.00 756.50 593.00 367.00 251.50 321.00 441.00 682.00 1020.00 922.50 8931.50
1970 1420.50 848.00 872.50 859.50 586.00 433.97 a 341.00 371.50 508.00 884.50 926.50 1293.22 a 9345.18
1971 1593.52 e 1068.00 1313.50 889.00 776.00 496.00 348.50 292.50 489.31 a 845.02 b 1102.76 a 111.50 z 9214.11
1972 1434.61 d 1209.71 a 1337.00 1013.00 688.50 513.50 192.50 303.00 522.50 808.50 999.00 1278.00 10299.83
1973 1575.00 1154.00 1061.50 810.50 681.00 450.00 351.00 352.00 542.50 831.00 1150.50 1145.50 10104.50
1974 1416.00 1166.00 1146.50 792.00 573.00 376.50 286.50 225.00 435.50 779.50 975.50 1192.00 9364.00
1975 1333.50 1226.00 1130.00 882.00 671.00 472.00 277.45 a 263.50 g 483.00 801.00 1194.00 1301.50 9771.45
1976 1203.50 1209.00 1078.00 838.50 656.00 391.50 301.50 328.00 544.00 855.50 837.50 1017.00 9260.00
1977 855.00 811.00 1093.50 881.00 645.00 368.00 236.00 294.50 469.50 779.00 1238.50 1360.50 9031.50
1978 1056.50 912.50 962.00 781.00 612.50 450.00 360.50 251.00 473.00 778.00 988.50 1122.50 8748.00
1979 1098.50 1374.00 929.00 766.00 618.00 408.50 0.00 z 280.00 399.00 688.00 836.00 1415.00 8812.00
1980 1304.50 939.50 1015.25 a 780.50 675.50 408.50 295.00 349.50 480.50 745.03 a 937.76 a 1585.00 9516.54
1981 866.00 977.50 892.00 786.72 a 513.00 377.50 328.00 353.92 a 504.50 778.00 1067.50 1182.00 8626.64
1982 1351.50 1195.70 a 1021.00 884.00 673.73 a 443.00 315.17 a 303.00 487.50 937.00 978.50 1020.50 9610.60
1983 1197.50 946.50 881.50 759.50 581.00 353.00 234.50 294.00 517.00 778.50 894.50 1118.50 8556.00
1984 1141.50 1117.00 848.00 808.00 582.50 341.50 268.00 256.50 451.50 781.50 1058.00 1043.00 8697.00
1985 870.50 1166.50 1023.50 992.50 644.50 447.50 296.50 330.50 450.00 925.00 1161.50 918.50 9227.00
1986 969.50 1036.00 1074.00 899.00 572.50 415.86 a 274.50 382.50 421.00 688.50 941.50 932.50 8607.36
1987 998.20 a 856.00 980.12 a 743.50 572.50 453.50 275.50 259.50 453.50 721.00 921.50 1160.43 a 8395.25
1988 1083.00 931.50 895.00 789.50 587.50 376.50 280.50 323.00 499.50 766.00 1002.41 a 1120.50 8654.91
1989 1533.50 1065.00 1019.50 741.00 551.50 407.50 227.50 275.00 426.21 a 793.50 1114.66 a 979.00 9133.86
1990 1275.50 1319.50 930.00 a 684.00 571.00 325.50 293.00 242.00 437.07 a 820.50 1221.21 a 1152.50 9271.78
1991 0.00 z 1016.30 a 1014.22 a 813.00 669.50 439.00 351.50 332.00 470.00 785.50 910.00 1124.50 7925.51
1992 1073.00 1185.50 1092.50 773.00 575.50 406.00 299.00 379.00 612.41 a 885.50 937.00 1194.50 9412.91
1993 1237.00 975.00 928.50 706.00 518.70 c 361.03 a 197.00 245.70 d 461.25 b 683.50 936.00 985.00 8234.68
1994 1062.27 a 1176.56 c 1097.00 761.50 642.50 351.21 a 305.50 221.00 479.50 829.50 1155.52 a 1178.00 a 9260.05
1995 1162.50 1058.50 1214.68 a 699.50 627.50 398.50 301.98 b 270.50 400.50 718.50 1069.00 1088.50 9010.17
1996 1403.50 1160.00 913.50 776.50 476.00 335.50 283.43 c 286.00 506.00 932.50 1043.50 1222.00 9338.43
1997 1198.00 824.00 1049.00 0.00 z 482.57 a 282.41 a 0.00 z 0.00 z 355.38 d 452.50 l 0.00 z 0.00 z 4191.37
1998 1120.00 0.00 z 914.00 764.48 a 662.00 383.00 0.00 z 371.00 0.00 z 757.50 0.00 z 1226.57 a 6198.55
1999 1348.50 a 1306.67 a 1100.50 838.50 600.00 385.86 a 217.00 c 0.00 z 0.00 z 0.00 z 1033.97 a 1233.50 8064.50
2000 1335.14 b 924.89 a 927.50 742.50 547.50 434.50 329.63 a 254.20 a 445.18 b 774.50 847.76 a 939.30 a 8502.60
2001 942.29 b 906.77 b 961.00 a 781.55 a 628.00 270.00 b 297.60 a 246.00 463.39 b 915.00 1040.00 1345.92 a 8797.52
2002 1090.96 e 995.50 1107.00 889.00 536.50 414.00 277.00 290.50 455.50 638.50 750.00 1020.23 c 8464.69
2003 1028.00 830.50 0.00 z 714.64 b 569.22 b 189.00 r 206.84 b 0.00 z 314.50 i 694.06 d 1090.86 a 1136.09 d 6270.22
2004 1360.00 902.62 a 1090.68 a 629.50 f 445.22 b 261.00 f 231.35 d 146.22 a 500.17 a 714.03 a 0.00 z 863.50 g 5390.31
2005 1089.13 a 1003.50 0.00 z 0.00 z 0.00 z 296.67 c 212.02 c 0.00 z 0.00 z 0.00 z 0.00 z 358.00 r 2601.32
2006 1383.52 d 1015.50 1084.50 827.31 d 528.66 c 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4839.49
Period of Record Statistics
MEAN 1229.05 1059.02 1047.63 807.19 604.27 393.24 277.90 289.53 465.17 789.24 1012.37 1191.06 9147.09
S.D. 178.32 139.26 120.73 69.71 67.41 63.37 46.33 52.06 46.14 76.30 117.46 162.00 514.57
SKEW -0.12 0.24 0.48 0.62 0.01 0.04 -0.19 -0.33 0.16 0.14 0.21 0.21 0.43
MAX 1593.52 1374.00 1337.00 1013.00 776.00 532.00 360.50 382.50 612.41 937.00 1239.00 1585.00 10404.00
MIN 855.00 811.00 848.00 684.00 445.22 269.50 186.00 146.22 355.38 638.50 750.00 918.50 8234.68
NO YRS 55 56 55 54 56 54 53 51 53 54 53 53 45