PORTHILL, IDAHO

Monthly Total Heating Degree Days

(107264)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1892 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
1893 1380.00 1222.50 1009.00 767.78 c 391.00 305.00 38.50 52.50 302.50 745.50 1060.50 1129.95 a 8404.73
1894 1378.50 1189.50 955.00 668.79 a 374.00 211.55 a 35.00 i 37.20 a 404.50 712.50 825.00 1265.00 8021.54
1895 1365.50 980.00 a 932.00 544.00 410.75 a 192.86 b 64.50 l 64.14 b 463.00 568.00 910.00 1178.52 a 7608.76
1896 1283.00 993.25 a 957.50 656.50 422.00 135.50 35.50 60.97 a 327.50 601.92 a 1185.00 1089.59 d 7748.23
1897 1223.50 958.50 1078.28 a 438.50 109.50 142.50 110.50 3.50 312.00 546.63 a 1020.00 1215.50 7158.92
1898 1282.00 866.44 a 916.00 407.50 219.00 123.50 0.00 q 0.00 z 0.00 z 460.00 1064.50 1281.13 e 6620.08
1899 1597.69 e 1073.00 1067.50 807.50 487.00 290.50 13.50 259.00 369.50 592.50 772.50 1160.43 a 8490.63
1900 1085.00 1207.50 907.50 499.50 440.00 56.00 109.00 216.48 a 337.00 747.50 1179.50 982.00 7766.98
1901 1396.50 1199.00 975.50 0.00 z 130.00 n 322.50 73.50 17.00 444.00 561.00 854.00 1096.50 6939.50
1902 1256.00 937.00 922.00 688.50 359.00 253.00 140.00 94.50 366.00 570.00 927.50 1198.50 7712.00
1903 1145.00 1206.00 989.00 658.50 431.00 88.50 139.00 93.50 420.00 639.00 981.00 1070.50 7861.00
1904 1094.50 1007.50 1014.50 532.50 346.50 212.50 50.00 102.00 292.50 610.50 762.00 1037.00 7062.00
1905 1141.00 1214.00 768.00 534.50 380.00 194.50 35.50 75.00 267.50 764.00 974.50 1102.50 7451.00
1906 1116.50 953.50 989.00 469.50 328.50 214.50 1.50 72.50 249.00 507.00 955.00 1094.50 6951.00
1907 1575.00 1000.00 881.50 642.00 338.00 187.00 52.50 166.00 320.00 519.50 811.00 1063.00 7555.50
1908 1215.00 1063.00 906.50 541.50 405.50 202.50 38.50 89.50 285.00 627.50 815.00 1156.00 7345.50
1909 1445.00 948.50 872.50 668.50 401.00 165.50 89.50 112.50 263.00 681.00 935.00 1322.50 7904.50
1910 1315.50 1236.50 747.50 470.50 298.00 188.00 48.00 184.00 309.00 512.00 878.00 1018.00 7205.00
1911 1277.50 1093.00 834.50 594.00 455.00 183.50 65.00 134.50 399.00 697.50 1138.00 1225.50 8097.00
1912 1313.50 975.00 985.00 549.50 305.00 115.71 b 111.50 144.00 431.50 731.00 877.50 1096.50 7635.71
1913 1407.00 1267.50 1085.00 610.50 368.50 169.50 120.00 90.00 340.00 698.00 874.00 1147.50 8177.50
1914 1066.50 1118.00 841.50 530.50 381.50 234.00 33.50 63.50 370.00 601.50 843.00 1400.00 7483.50
1915 1277.50 904.50 750.00 440.00 328.00 201.50 93.50 3.50 341.50 558.50 973.00 1238.50 7110.00
1916 1718.50 1147.50 872.00 576.00 492.50 271.50 95.50 83.00 349.00 715.00 1032.50 1440.50 8793.50
1917 1262.50 1077.00 1113.50 703.00 396.00 237.00 37.00 79.50 282.50 641.50 826.50 1134.50 7790.50
1918 1166.50 1134.50 810.00 584.50 445.00 146.00 57.50 120.00 206.00 496.00 893.50 1091.00 7150.50
1919 1130.50 1035.50 917.50 544.50 389.00 212.50 42.50 60.00 323.00 779.50 1010.00 1357.00 7801.50
1920 1213.50 1098.00 918.00 664.00 462.00 265.00 9.50 91.00 333.00 662.00 904.50 1070.50 7691.00
1921 1157.00 938.50 900.00 642.00 344.50 137.00 55.00 65.00 424.00 585.50 965.50 1260.50 7474.50
1922 1435.50 1219.50 982.50 657.50 440.00 111.00 32.50 54.00 232.50 566.00 970.50 1391.50 8093.00
1923 1097.50 1270.50 945.50 579.50 402.00 181.00 60.00 110.00 317.00 664.50 877.50 1102.50 7607.50
1924 1453.50 813.50 872.00 625.00 261.00 204.50 83.00 202.50 429.83 a 692.00 980.00 1506.00 8122.83
1925 1210.50 824.50 886.50 547.50 359.00 218.00 41.00 214.50 344.50 718.00 928.50 909.85 a 7202.35
1926 1132.50 811.50 727.50 460.00 345.00 153.75 b 10.00 96.00 439.50 553.50 839.00 1157.00 6725.25
1927 1265.50 978.00 872.00 626.00 476.50 149.00 60.50 53.00 335.00 543.00 869.50 1426.50 7654.50
1928 1218.50 1020.50 794.50 646.55 a 317.00 184.00 71.00 102.00 290.00 754.00 952.24 a 1206.50 7556.79
1929 1611.50 1309.50 832.00 645.50 379.50 229.00 54.50 53.50 408.50 645.50 1044.50 1041.00 8254.50
1930 1696.00 893.50 856.00 415.00 405.50 194.00 47.50 33.50 232.00 666.50 975.50 1180.50 7595.50
1931 1033.00 937.50 779.00 539.00 262.50 146.25 b 37.00 33.00 291.50 614.00 1004.50 1215.50 6892.75
1932 1348.00 1115.50 922.00 556.00 345.00 126.00 48.50 69.00 288.00 634.00 816.00 1297.50 7565.50
1933 1109.00 1253.00 875.50 579.50 402.50 204.50 42.00 49.00 379.50 613.00 778.50 991.00 7277.00
1934 980.50 928.50 780.50 404.00 299.00 138.50 36.00 48.50 383.00 522.50 760.00 1075.50 6356.50
1935 1307.50 1028.50 979.50 690.50 405.50 191.50 92.00 102.50 218.50 680.00 1032.00 1092.00 7820.00
1936 1086.00 1548.00 949.50 529.00 236.50 109.00 14.00 33.50 303.50 595.00 1099.50 1126.00 7629.50
1937 1867.00 1185.00 951.50 657.00 336.50 174.50 24.50 105.00 214.00 511.50 831.50 1097.50 7955.50
1938 1179.00 1049.50 871.50 562.50 370.50 115.50 14.00 96.50 138.50 564.50 991.00 1125.50 7078.50
1939 1056.00 1149.50 887.00 502.00 330.50 273.50 58.00 22.00 f 274.00 640.00 900.00 1014.50 7085.00
1940 1265.00 997.50 774.00 574.50 274.00 83.50 12.50 27.00 118.50 471.00 1026.50 1067.00 6691.00
1941 1154.50 931.50 692.50 441.50 345.00 119.00 16.50 100.00 399.00 648.00 812.50 1037.50 6697.50
1942 1336.00 971.50 838.50 489.50 388.50 213.50 38.50 60.00 218.50 546.50 995.00 1134.50 7230.50
1943 1474.00 996.50 1120.50 527.07 a 412.50 242.14 b 65.62 a 70.00 232.50 585.38 a 906.50 1178.00 7810.71
1944 1210.50 1014.50 947.00 518.50 298.50 105.00 c 36.50 57.00 189.50 472.50 864.00 1207.00 6920.50
1945 1054.50 906.00 884.00 671.00 292.50 185.00 3.00 31.00 312.41 a 586.50 859.00 1159.50 6944.41
1946 1163.53 a 1011.00 795.00 534.00 291.00 195.50 38.50 65.00 303.50 726.50 1081.00 1218.00 7422.53
1947 1338.50 1037.50 844.00 546.00 282.50 208.00 33.50 94.00 244.50 510.00 927.00 1034.00 7099.50
1948 1253.50 1115.00 947.00 587.59 a 331.00 84.64 b 64.50 88.00 264.00 669.00 906.50 1385.50 7696.23
1949 1708.50 1231.50 983.50 482.00 244.50 170.50 63.50 55.28 a 254.50 716.62 a 783.50 1152.50 7846.40
1950 1784.00 1042.50 985.00 644.50 401.00 169.00 41.50 27.00 239.00 617.00 928.50 1005.50 7884.50
1951 1239.00 1020.50 1055.50 568.50 327.00 189.50 41.00 87.00 292.50 643.50 934.50 1380.00 7778.50
1952 1335.50 1017.00 918.50 500.50 305.50 162.00 48.50 67.50 184.00 527.00 993.00 1070.50 7129.50
1953 882.00 882.50 791.50 620.00 351.00 235.00 31.00 40.00 234.00 411.00 g 545.00 j 972.50 5039.50
1954 1328.00 904.50 988.00 620.50 303.50 225.50 45.00 86.00 270.50 682.00 715.50 1067.50 7236.50
1955 1136.00 1113.50 1103.50 677.50 445.00 145.50 96.50 53.00 259.50 630.00 1155.50 1276.00 8091.50
1956 1216.00 1205.50 982.00 533.00 260.00 193.50 38.50 50.00 238.50 591.50 1067.50 1130.00 7506.00
1957 1604.00 1164.00 943.00 550.50 177.50 112.00 52.50 118.50 239.00 685.50 957.50 1010.50 7614.50
1958 639.00 k 819.00 0.00 z 590.00 166.00 57.50 17.50 18.00 266.90 a 630.50 1047.00 e 1120.50 4732.90
1959 1186.50 1075.50 830.50 546.50 419.50 148.00 59.50 114.50 326.50 639.50 1146.50 1156.00 7649.00
1960 1394.50 1072.50 948.00 589.00 399.50 128.50 11.50 130.00 279.00 578.00 965.00 1168.00 7663.50
1961 1105.00 830.00 782.50 595.00 332.00 55.00 24.00 21.00 409.14 a 711.50 1078.50 1226.00 7169.64
1962 1379.50 974.00 955.50 505.50 384.00 170.00 99.00 111.50 251.00 597.00 800.50 979.50 7207.00
1963 1507.50 895.50 826.50 596.00 379.50 169.50 73.50 65.00 157.50 533.50 892.50 1223.50 7320.00
1964 1139.50 1079.00 1014.00 655.50 402.50 137.00 27.00 144.00 384.50 625.50 914.00 1316.50 7839.00
1965 1120.50 983.00 1135.00 555.00 380.00 110.50 26.50 58.50 431.50 554.50 862.00 1101.50 7318.50
1966 1157.50 982.50 915.00 607.00 298.00 205.00 45.50 67.00 110.00 626.00 894.50 1007.50 6915.50
1967 1029.00 876.50 919.00 682.00 369.50 100.50 16.50 14.00 97.00 596.50 910.00 1184.00 6794.50
1968 1236.90 a 922.50 776.00 639.50 376.50 202.50 47.00 101.50 291.50 673.00 888.00 1324.00 7478.90
1969 1538.00 1077.00 945.00 534.00 234.50 101.00 83.00 47.50 233.00 677.00 844.50 1069.50 7384.00
1970 1232.50 949.50 902.00 657.00 295.50 90.00 20.50 14.98 a 413.50 686.00 939.50 1219.50 7420.48
1971 1197.50 961.50 935.50 548.50 289.00 239.00 102.00 12.50 377.50 678.50 881.00 1250.00 7472.50
1972 1344.00 991.50 744.50 653.50 273.00 167.00 81.00 22.00 364.50 699.00 874.00 1266.50 7480.50
1973 1272.00 943.00 772.50 555.50 311.00 169.00 23.50 49.00 241.00 611.50 1003.00 1046.00 6997.00
1974 1248.00 860.00 854.50 542.00 432.00 94.50 61.50 85.00 263.50 609.00 814.50 1027.00 6891.50
1975 1270.00 1195.50 1012.00 688.00 383.50 203.50 26.50 150.50 273.62 a 651.50 986.50 1121.50 7962.62
1976 1195.50 1005.00 1032.00 571.50 335.50 245.50 75.95 a 135.00 245.00 700.00 958.50 1094.00 7593.45
1977 1297.50 896.50 888.50 517.00 403.50 75.50 82.50 75.50 327.50 681.50 1028.50 1283.00 7557.00
1978 1290.00 983.50 903.00 592.00 439.50 151.50 38.50 149.00 244.66 a 603.00 1057.00 1385.00 7836.66
1979 1646.10 a 962.89 a 836.50 578.00 328.00 151.00 58.00 19.50 216.50 575.50 1026.00 961.50 7359.49
1980 1507.50 1007.00 905.00 470.50 256.50 203.50 66.00 171.50 326.00 619.00 877.00 1063.50 7473.00
1981 1068.00 927.50 766.00 575.50 363.50 289.00 111.08 a 40.50 301.00 701.50 873.50 1223.47 a 7240.55
1982 1276.17 a 1074.37 a 868.00 656.50 377.50 84.50 111.50 77.50 304.50 696.50 1034.50 1196.50 7758.04
1983 1055.00 848.00 727.47 a 0.00 z 290.00 147.50 111.50 19.00 348.00 629.00 787.50 1500.50 6463.47
1984 1103.50 929.00 746.00 587.00 481.50 192.00 33.00 58.50 369.00 696.98 a 914.50 1405.69 b 7516.67
1985 1291.00 1166.50 954.00 525.50 251.50 143.50 2.50 104.37 a 408.75 b 705.50 1303.00 1302.52 a 8158.63
1986 1088.10 a 1050.50 747.00 584.48 a 329.00 76.00 123.48 a 3.10 a 369.00 597.00 936.50 1135.50 7039.67
1987 1151.65 a 933.50 768.50 449.50 244.00 108.00 71.00 98.50 191.00 636.00 833.00 1214.00 6698.65
1988 1297.50 952.50 788.00 516.50 310.50 149.50 58.00 48.16 c 303.00 520.50 865.00 1171.00 6980.16
1989 1151.00 1266.50 929.50 531.50 334.36 c 92.00 27.50 129.00 253.50 636.00 827.00 1066.00 7243.86
1990 1000.50 1016.50 779.00 469.50 383.88 a 198.00 37.50 56.00 154.00 702.50 829.14 a 1382.50 7009.02
1991 1349.50 792.50 911.00 560.00 c 361.00 205.50 25.50 0.00 z 221.00 691.82 a 962.00 1112.50 7192.32
1992 1061.00 833.50 704.00 522.50 278.50 78.00 63.50 108.00 357.50 586.50 886.00 1371.23 a 6850.23
1993 1398.00 1150.50 894.00 563.00 175.50 167.50 170.00 102.00 300.00 599.00 1095.00 1114.50 7729.00
1994 960.00 1060.50 770.00 447.50 271.50 199.50 31.52 a 36.00 170.17 a 627.50 1013.50 1145.97 a 6733.66
1995 1182.50 896.00 a 830.59 b 586.00 274.35 a 168.00 30.00 158.50 182.00 657.41 b 802.00 1105.67 a 6873.02
1996 1352.00 1118.00 934.00 583.50 457.25 a 148.45 a 41.33 a 72.50 384.50 664.43 a 997.00 1307.17 a 8060.13
1997 1237.50 991.00 903.28 b 0.00 z 297.08 a 160.56 c 60.97 a 59.93 a 245.69 a 635.50 908.28 a 1149.00 6648.78
1998 1136.15 a 835.00 759.50 497.00 230.95 a 109.29 b 2.67 b 33.50 147.50 646.00 808.50 1204.02 c 6410.08
1999 1067.50 907.00 841.50 620.17 a 428.00 214.50 88.50 20.50 286.07 b 600.50 753.50 997.50 6825.24
2000 1152.00 1009.00 794.00 541.00 364.00 163.50 39.78 a 52.00 343.50 616.90 a 1020.50 1278.50 7374.68
2001 1152.00 1064.50 840.00 622.00 325.00 190.50 49.50 17.50 133.00 638.82 c 768.00 1148.55 a 6949.37
2002 1115.50 988.00 1028.50 551.00 410.00 133.00 35.00 52.50 250.00 733.00 929.50 963.50 7189.50
2003 1075.00 951.00 814.50 553.00 341.00 100.50 17.00 8.50 196.00 503.00 1028.50 1213.00 6801.00
2004 0.00 z 977.00 729.50 474.00 304.00 136.03 a 30.00 28.50 252.00 404.00 g 868.50 1001.50 4801.03
2005 1305.32 c 930.00 787.00 526.50 269.50 214.00 29.50 84.50 289.50 580.50 0.00 z 1348.00 6364.32
2006 0.00 z 1030.00 861.00 522.00 327.00 112.50 8.50 39.50 156.00 i 612.00 901.50 1219.73 e 5633.73
2007 1246.31 d 939.08 b 772.13 d 584.00 293.35 d 160.00 5.50 h 28.00 h 249.00 423.00 j 948.50 1203.50 6395.87
2008 1355.50 1033.73 e 638.00 i 723.50 282.50 f 143.50 h 19.50 f 93.55 c 256.50 h 648.13 d 623.00 h 1117.00 f 3854.41
2009 1044.00 g 1089.50 1049.41 d 412.50 j 195.50 j 90.00 n 0.00 z 0.00 z 0.00 z 9.50 z 0.00 z 0.00 z 2138.91
2010 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 1026.00 1204.50 2230.50
2011 1215.50 1134.00 857.00 532.50 f 401.00 211.50 71.00 16.05 c 156.50 647.00 1008.10 a 1111.00 6828.66
2012 1147.00 994.50 854.50 550.18 b 370.00 228.00 35.13 a 17.00 k 237.00 620.52 a 825.00 1038.50 6900.33
2013 1199.50 870.00 825.24 b 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 2894.74
Period of Record Statistics
MEAN 1261.56 1025.38 889.33 571.36 345.22 168.87 52.85 76.65 291.12 626.13 933.22 1167.75 7435.99
S.D. 180.40 128.55 99.62 76.16 72.39 56.13 33.35 49.35 81.43 69.24 106.21 125.74 465.52
SKEW 0.98 0.76 0.27 0.22 -0.41 0.17 0.94 1.05 -0.09 -0.20 0.54 0.52 0.16
MAX 1867.00 1548.00 1135.00 807.50 492.50 322.50 170.00 259.00 463.00 779.50 1303.00 1506.00 8793.50
MIN 882.00 792.50 692.50 404.00 109.50 55.00 1.50 3.10 97.00 460.00 715.50 909.85 6356.50
NO YRS 116 120 118 114 116 117 113 113 115 115 116 118 101