NORTHPORT, WASHINGTON

Monthly Total Heating Degree Days

(455946)

Base Temperature = 65 F

File last updated on Jul 25, 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
1920 1257.50 971.00 809.50 599.00 363.00 171.00 6.00 60.00 231.50 564.50 822.50 1037.00 6892.50
1921 1144.50 958.50 833.50 594.00 241.00 65.50 31.00 20.50 325.00 499.50 905.00 1251.00 6869.00
1922 1349.00 1228.50 907.50 557.00 312.00 26.50 4.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4384.50
1923 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 0.00 z 0.00 z 0.00 z 0.00
1924 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 0.00 z 0.00 z 0.00 z 0.00
1925 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 0.00 z 0.00 z 0.00 z 0.00
1926 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 0.00 z 0.00 z 0.00 z 0.00
1927 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 491.00 869.50 1386.00 2746.50
1928 1157.00 974.00 755.50 512.50 149.00 100.50 9.50 33.00 163.00 592.50 864.50 1188.00 6499.00
1929 1538.00 1281.00 734.50 565.50 246.00 107.50 5.00 6.00 235.50 520.50 1005.00 1089.50 7334.00
1930 1709.50 982.50 830.50 359.50 293.50 121.00 19.00 8.50 158.50 605.00 909.00 1101.00 7097.50
1931 1008.50 945.50 731.00 469.00 195.50 89.50 5.00 9.00 239.50 543.50 983.50 1180.00 6399.50
1932 1296.50 1185.00 900.00 475.00 278.50 77.00 24.50 39.00 176.00 527.00 834.50 1294.50 7107.50
1933 1166.00 1286.00 863.00 518.00 352.50 106.50 11.00 22.00 302.50 541.50 779.50 1033.50 6982.00
1934 1052.89 c 892.00 679.50 267.00 221.50 59.50 11.00 9.00 258.50 448.50 693.50 1026.00 5618.89
1935 1196.00 941.00 932.50 636.00 306.50 128.00 53.00 92.00 253.00 702.00 1006.50 1012.00 7258.50
1936 1125.50 1454.00 852.00 393.50 131.50 51.00 0.00 7.00 177.50 431.00 968.50 1052.50 6644.00
1937 1756.50 1140.00 749.50 511.00 184.50 60.50 7.00 44.50 126.00 411.00 791.00 1047.00 6828.50
1938 1106.50 931.00 761.50 425.00 240.00 16.50 2.50 10.50 43.50 442.00 936.50 1164.50 6080.00
1939 1057.50 1080.50 772.50 376.00 175.00 138.50 9.50 7.50 152.50 472.50 756.00 943.50 5941.50
1940 1145.00 910.00 634.50 407.00 152.00 28.00 1.00 2.00 45.00 392.50 958.50 1057.00 5732.50
1941 1038.00 839.50 565.00 336.00 236.50 64.50 0.00 45.50 286.50 499.50 764.00 1001.50 5676.50
1942 1227.50 891.50 740.50 397.50 288.50 146.50 18.50 30.50 83.00 426.00 914.50 1044.50 6209.00
1943 1439.50 906.00 919.00 385.50 339.50 152.00 22.00 11.50 103.00 464.50 802.00 1158.50 6703.00
1944 1213.50 982.50 851.50 416.50 211.00 59.00 13.50 6.00 134.00 395.00 808.00 1143.00 6233.50
1945 1065.50 0.00 z 0.00 z 0.00 z 0.00 z 103.00 6.50 8.00 204.00 451.00 912.00 1107.50 3857.50
1946 1165.00 929.50 741.00 455.00 175.00 150.00 7.50 14.50 185.00 617.00 971.00 149.00 z 5410.50
1947 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 0.00 z 0.00 z 0.00 z 0.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 27.50 23.00 30.50 186.00 571.71 e 894.00 1360.50 3093.21
1949 1682.50 1182.00 848.00 382.76 a 168.00 104.50 13.50 18.50 140.50 613.50 722.50 1173.00 7049.26
1950 1750.00 988.00 862.50 540.00 302.00 94.00 10.00 2.00 119.00 572.50 870.50 980.00 7090.50
1951 1230.50 1009.50 934.00 470.50 212.00 81.50 9.50 37.00 157.50 552.00 908.00 1324.50 6926.50
1952 1269.00 980.00 827.50 435.50 214.50 90.00 23.00 31.50 73.00 369.00 957.50 1002.00 6272.50
1953 916.00 862.50 706.28 a 534.00 277.00 133.00 6.50 18.00 164.50 475.50 755.50 1018.00 5866.78
1954 1234.00 806.50 839.50 579.50 237.00 163.50 30.50 95.50 245.50 610.50 692.50 1064.00 6598.50
1955 1096.00 1053.50 1067.50 638.50 396.00 102.00 75.00 43.50 250.50 525.97 a 1047.00 1228.00 7523.47
1956 1101.00 1142.50 871.50 0.00 z 15.50 r 165.54 b 26.00 32.50 194.50 590.50 966.50 1106.00 6196.54
1957 1594.50 1114.30 a 838.50 494.00 151.00 123.50 67.50 190.50 233.00 0.00 z 0.00 z 0.00 z 4806.80
1958 0.00 z 0.00 z 0.00 z 0.00 z 93.00 e 31.50 8.00 10.00 265.00 463.50 980.50 1080.98 d 2932.48
1959 1207.89 c 994.50 780.17 a 440.56 c 318.61 d 86.50 30.50 59.00 247.00 562.00 1020.00 a 880.00 g 5746.73
1960 1355.50 1014.00 838.50 522.00 334.50 72.32 b 0.00 112.12 a 220.50 489.50 895.86 a 1110.66 b 6965.46
1961 1068.00 536.00 i 730.57 a 524.00 245.50 28.00 2.00 0.00 a 235.00 651.57 d 1032.00 800.50 j 4516.64
1962 1068.00 h 619.00 k 884.03 b 401.50 281.50 107.00 36.68 a 32.00 l 123.89 c 509.36 b 742.50 757.00 f 3086.47
1963 1315.50 846.00 710.50 494.00 239.50 58.00 14.43 b 9.50 g 79.29 b 454.15 a 854.42 d 788.00 j 5065.79
1964 1110.46 c 1028.96 b 615.00 j 529.62 d 201.50 k 78.00 15.50 91.00 286.50 548.00 901.00 1283.50 5872.54
1965 1073.00 941.50 928.50 434.50 326.50 66.00 15.00 34.50 281.00 435.50 788.00 1067.50 6391.50
1966 1138.50 870.50 762.00 477.50 199.00 120.00 23.52 b 25.00 44.50 520.00 821.00 972.50 5974.02
1967 1034.50 863.50 812.50 565.00 265.00 29.50 0.50 0.00 35.00 511.00 834.50 1177.50 6128.50
1968 1186.00 884.00 681.50 524.00 263.50 84.50 7.00 43.00 152.00 569.00 853.50 1254.00 6502.00
1969 1446.00 988.50 785.50 427.00 148.00 37.00 23.00 25.00 149.50 575.00 804.00 1025.50 6434.00
1970 1209.00 863.00 781.50 575.50 210.50 60.00 7.50 2.00 279.00 575.50 893.00 1173.00 6629.50
1971 1184.00 905.50 904.50 480.00 180.00 118.50 54.50 3.50 243.50 566.00 843.00 1240.00 6723.00
1972 1327.00 991.00 718.00 584.50 189.50 88.50 28.50 7.00 274.00 558.50 815.50 1260.00 6842.00
1973 1250.00 872.50 695.00 473.00 219.00 110.50 7.00 25.50 147.50 540.00 933.50 1011.50 6285.00
1974 1241.00 844.50 774.00 432.50 328.50 52.00 15.00 12.50 111.50 492.50 802.50 1009.00 6115.50
1975 1218.50 1055.00 891.00 541.00 253.00 113.50 7.50 84.00 147.50 537.50 920.50 1077.52 b 6846.52
1976 1085.50 945.50 889.50 477.50 205.00 144.00 19.00 45.50 66.00 505.62 b 892.50 d 1094.50 6370.12
1977 1276.50 846.00 765.00 381.00 327.50 43.00 24.50 33.00 233.00 552.50 960.00 1229.00 6671.00
1978 1179.50 856.00 725.50 433.00 287.50 62.00 7.00 55.50 196.50 518.00 991.00 1360.50 6672.00
1979 1560.00 984.50 737.00 508.50 225.00 58.00 21.50 0.00 82.50 436.00 928.00 955.50 6496.50
1980 1321.12 a 939.00 797.98 b 327.50 h 0.00 z 0.00 z 0.00 z 57.50 n 206.00 524.50 843.50 1051.00 5683.10
1981 979.00 855.50 615.50 520.00 248.00 192.86 b 32.00 27.00 193.20 e 664.50 791.50 680.00 n 5119.06
1982 1286.00 1040.00 769.50 611.50 325.50 56.00 58.50 21.50 202.50 569.00 1042.50 1140.50 7123.00
1983 1059.50 770.00 644.00 452.50 205.50 91.50 0.00 z 0.00 272.00 564.00 776.50 1469.00 6304.50
1984 1186.50 937.00 785.50 509.50 394.00 144.50 13.00 23.00 296.00 673.00 926.50 1408.00 7296.50
1985 1258.50 1086.50 868.60 e 248.00 q 214.00 90.50 0.00 43.40 a 319.00 661.00 1273.50 1282.00 7097.00
1986 1075.50 992.00 723.00 555.50 290.50 41.50 45.50 0.00 a 272.50 487.00 926.50 1102.50 6512.00
1987 1166.00 838.50 697.00 351.00 181.00 51.50 16.00 27.00 96.50 519.50 753.50 1143.00 5840.50
1988 1253.50 971.50 755.00 395.50 228.00 105.00 28.00 6.50 220.50 437.00 853.50 1130.50 6384.50
1989 1156.00 1169.00 832.50 428.00 273.00 39.50 9.50 38.00 126.00 590.50 842.50 1033.50 6538.00
1990 1053.00 1012.50 707.00 371.00 301.00 149.00 15.50 27.00 56.00 614.50 810.00 1391.00 6507.50
1991 1341.50 758.00 830.00 487.50 297.50 135.00 9.00 10.00 91.50 592.00 925.00 1042.00 6519.00
1992 1021.50 788.00 585.50 420.50 179.50 42.00 16.50 55.00 241.50 536.50 868.00 1279.00 6033.50
1993 1342.00 1043.00 812.00 508.50 133.00 103.00 74.00 58.50 176.50 489.00 1061.00 1099.00 6899.50
1994 982.50 990.50 718.00 417.00 218.00 102.00 15.50 0.00 z 75.50 537.00 986.50 1137.00 6179.50
1995 1134.00 852.00 796.00 542.00 200.00 99.50 9.00 60.50 99.50 587.00 848.00 1095.00 6322.50
1996 1268.50 1063.50 823.50 521.00 407.00 96.50 23.00 34.00 252.50 606.00 927.41 a 1274.00 7296.91
1997 1166.50 947.00 855.50 580.50 227.00 122.00 25.00 8.50 125.00 561.50 849.50 1087.50 6555.50
1998 1093.50 766.00 708.00 473.00 178.50 74.50 0.00 10.50 70.50 559.00 756.00 1148.00 5837.50
1999 1030.50 877.00 756.00 539.50 366.83 a 152.00 60.00 17.50 214.00 559.00 742.50 1040.00 6354.83
2000 1146.00 923.00 754.00 446.50 332.50 120.00 43.50 53.50 250.50 579.00 1022.00 1240.00 6910.50
2001 1120.50 984.00 757.00 582.50 271.50 164.00 23.50 11.50 109.00 623.00 774.00 1138.22 a 6558.72
2002 1134.50 951.50 899.50 522.00 341.00 98.00 22.00 33.50 189.50 651.50 856.00 975.50 6674.50
2003 1023.50 906.00 769.00 509.50 310.50 56.50 11.50 2.50 174.00 467.00 1020.50 1133.00 6383.50
2004 1191.00 910.50 663.00 395.00 266.00 104.50 13.50 23.00 197.50 521.00 867.00 1039.50 6191.50
2005 878.50 l 914.00 734.00 470.00 215.50 133.50 15.00 21.00 221.50 528.50 881.00 1292.50 5426.50
2006 954.00 967.00 777.00 469.00 251.50 33.62 a 0.00 k 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3452.12
Period of Record Statistics
MEAN 1211.69 969.68 786.85 480.47 250.61 91.92 19.21 30.23 180.96 534.06 883.55 1138.74 6551.95
S.D. 180.13 126.61 88.44 76.24 68.77 41.42 17.32 31.12 75.55 70.22 100.20 121.64 444.89
SKEW 1.30 1.18 0.12 -0.15 0.17 0.19 1.54 2.38 -0.15 -0.06 0.67 0.68 -0.05
MAX 1756.50 1454.00 1067.50 638.50 407.00 192.86 75.00 190.50 325.00 702.00 1273.50 1469.00 7523.47
MIN 916.00 758.00 565.00 267.00 93.00 16.50 0.00 0.00 35.00 369.00 692.50 943.50 5618.89
NO YRS 77 76 77 75 76 80 78 75 79 79 79 73 62