PORTHILL, IDAHO

Monthly Total Heating Degree Days

(107264)

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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 88.00 264.00 669.00 906.50 1385.50 3313.00
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 0.00 z 3799.53
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 1030.00 860.50 534.50 322.92 a 89.40 e 2.00 l 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 2837.32
Period of Record Statistics
MEAN 1246.44 993.50 878.23 566.84 330.69 154.06 53.09 68.74 271.84 636.10 931.69 1177.22 7346.25
S.D. 183.26 108.62 102.26 59.49 71.62 51.77 33.45 43.78 78.76 53.28 111.74 130.60 411.97
SKEW 0.88 0.45 0.35 0.09 -0.17 0.10 1.08 0.52 -0.02 -0.41 0.68 0.30 -0.01
MAX 1784.00 1266.50 1135.00 688.00 481.50 289.00 170.00 171.50 431.50 733.00 1303.00 1500.50 8158.63
MIN 882.00 792.50 704.00 447.50 166.00 55.00 2.50 3.10 97.00 503.00 715.50 961.50 6410.08
NO YRS 55 58 57 56 58 58 57 57 58 56 56 57 50