ELK RIVER 1 S, IDAHO

Monthly Total Heating Degree Days

(102892)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201212
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
1952 1186.00 974.00 943.50 568.50 331.50 234.83 a 97.65 a 141.00 253.50 462.00 953.00 1062.00 7207.48
1953 910.50 879.50 847.50 653.00 522.00 327.22 c 104.50 127.00 279.50 540.50 771.00 1020.00 6982.22
1954 1158.50 841.50 980.50 709.50 394.50 318.00 88.00 163.00 278.79 a 638.71 b 746.90 a 1138.50 7456.40
1955 1151.00 1096.50 1185.50 803.00 558.00 229.00 129.00 106.00 312.00 553.72 b 1084.00 1212.50 8420.22
1956 1142.00 1146.50 1006.00 583.00 358.64 b 235.50 42.92 e 148.00 255.00 636.00 843.50 930.50 7327.56
1957 1266.00 0.00 z 360.00 n 574.00 200.50 210.54 b 97.00 125.66 c 199.66 a 570.83 b 950.77 d 1025.00 5219.95
1958 1119.00 754.00 894.00 698.00 245.33 b 133.45 a 29.50 35.50 325.50 553.50 925.34 a 947.50 6660.62
1959 1072.00 945.50 955.00 691.00 566.50 193.97 a 110.00 168.00 348.00 644.50 1022.50 1155.50 7872.47
1960 1365.00 1118.00 956.50 677.00 503.00 261.00 50.63 a 186.53 b 256.55 a 611.22 a 939.50 1206.50 8131.44
1961 1170.00 860.50 918.00 728.00 475.00 123.50 70.00 23.50 458.50 726.00 1063.00 1200.00 7816.00
1962 1385.00 1010.50 1073.00 623.50 526.50 279.00 163.50 151.50 240.52 a 596.00 848.00 837.50 g 6897.02
1963 1513.50 841.50 866.00 710.17 a 411.00 275.00 118.50 90.00 129.83 a 520.50 875.50 1159.00 7510.50
1964 1185.50 1128.00 1064.50 806.00 557.50 274.00 74.00 195.50 433.50 605.50 930.50 1252.00 8506.50
1965 1105.50 1002.50 1110.00 639.00 547.00 306.00 107.00 143.00 509.50 552.00 813.50 1174.00 8009.00
1966 1169.00 1050.00 1010.00 712.00 430.50 343.00 133.00 133.00 209.50 698.50 875.50 1038.00 7802.00
1967 1068.00 974.00 999.00 773.00 531.00 207.00 0.00 z 62.50 194.50 670.50 923.50 1226.00 7629.00
1968 1249.50 905.00 826.84 b 709.04 d 509.00 263.50 90.00 149.00 346.00 725.50 928.50 1269.00 7970.88
1969 1396.00 1034.50 963.50 662.50 398.00 197.50 132.50 128.00 317.00 745.00 912.50 1130.50 8017.50
1970 1198.00 880.50 984.00 829.50 478.00 211.61 b 92.00 117.50 508.00 731.00 889.50 1284.00 8203.61
1971 1196.00 1017.00 1090.50 757.50 431.93 a 356.50 142.50 63.50 514.00 757.00 1001.50 1283.00 8610.93
1972 1353.50 1067.50 859.50 817.00 432.93 b 232.00 138.00 66.50 445.50 635.50 893.28 a 1335.50 8276.71
1973 1267.00 945.50 875.50 678.50 419.50 286.00 102.50 110.50 327.00 655.00 979.50 1043.00 7689.50
1974 1314.00 914.50 973.00 685.00 531.50 169.50 117.50 156.00 278.50 623.00 832.00 1126.50 7721.00
1975 1155.50 1040.50 988.50 830.00 560.00 266.50 47.00 200.50 299.00 640.00 971.00 1115.00 8113.50
1976 1125.50 1050.50 1018.50 672.00 391.50 330.50 108.50 146.50 219.50 616.38 a 861.50 1192.90 e 7733.79
1977 1314.00 882.00 945.50 535.00 538.50 139.00 142.00 93.00 383.50 660.00 971.00 788.00 g 6603.50
1978 1041.60 a 871.50 779.00 627.50 513.00 202.00 97.00 174.00 341.00 625.00 1074.50 1411.00 7757.10
1979 1589.00 965.50 856.50 696.50 441.50 244.50 96.00 43.50 229.50 552.00 1010.00 1034.00 7758.50
1980 1373.50 924.00 923.00 517.00 410.00 287.00 89.50 223.50 310.00 600.50 862.50 1036.00 7556.50
1981 999.50 916.22 a 774.00 619.00 463.50 334.00 126.00 55.50 294.50 693.50 796.50 1112.50 7184.72
1982 744.50 j 1118.50 882.00 772.00 521.50 183.00 134.50 79.50 341.50 665.00 1010.50 1191.50 6899.50
1983 1078.00 871.50 782.00 421.50 j 440.50 233.50 154.00 41.00 432.50 645.50 845.50 1420.00 6944.00
1984 1184.50 968.50 883.00 707.50 566.00 303.00 130.00 65.00 370.00 745.50 953.50 1368.00 8244.50
1985 1300.50 1165.50 1007.50 600.00 392.50 270.00 17.00 184.50 468.00 757.00 1292.50 1424.50 8879.50
1986 1262.50 1085.00 894.00 668.50 438.50 120.00 219.50 23.00 424.50 595.50 969.00 1242.50 7942.50
1987 1249.00 948.00 869.50 495.00 a 335.50 184.50 115.00 174.00 244.00 596.00 873.50 1165.00 7249.00
1988 1263.50 978.50 877.00 585.00 437.00 184.00 125.55 a 112.50 348.50 473.00 867.50 1221.00 7473.05
1989 1197.00 1228.50 955.00 643.50 523.50 209.50 77.00 177.50 316.00 660.50 854.50 1116.00 7958.50
1990 1040.00 1047.00 881.50 563.00 504.00 270.50 73.50 93.50 135.00 717.00 899.00 1457.50 7681.50
1991 1272.50 846.00 955.83 a 697.24 a 505.50 330.50 91.00 61.00 278.00 690.00 626.00 j 1105.84 b 6833.42
1992 1107.00 866.50 671.50 311.50 m 255.00 i 160.50 123.00 149.00 388.50 581.50 985.00 1288.00 6320.50
1993 1319.00 1109.00 896.00 703.00 233.50 k 274.00 275.50 168.00 340.00 585.00 1106.00 1135.50 7911.00
1994 1042.50 1051.50 896.00 611.50 372.50 268.00 81.00 78.50 219.50 660.00 1080.00 1207.97 a 7568.97
1995 1226.00 928.00 925.50 710.00 441.50 283.50 104.00 198.50 160.00 i 754.50 880.50 1150.50 7602.50
1996 1159.50 1125.00 943.00 682.00 302.50 n 166.00 m 77.00 114.00 171.50 o 475.50 k 960.00 1185.23 a 6245.73
1997 1234.50 989.50 959.50 808.50 188.00 t 244.00 118.00 43.00 218.00 j 416.50 l 867.50 1175.00 6439.50
1998 1124.50 867.50 887.50 470.00 j 397.00 268.00 16.50 72.00 101.00 o 388.00 m 863.00 1217.00 5713.00
1999 1103.50 999.19 a 944.90 e 521.50 l 181.00 w 335.17 a 172.29 e 66.43 c 163.50 o 329.50 p 414.50 o 1147.55 c 4769.03
2000 1170.25 c 982.50 888.00 335.00 o 237.00 n 308.40 e 131.46 d 93.60 e 302.00 j 325.50 q 552.50 o 774.50 l 3574.21
2001 1219.50 1049.48 a 947.88 e 788.65 d 261.50 k 206.00 j 98.68 a 74.06 d 159.00 i 558.00 f 426.00 o 418.50 t 4178.26
2002 601.00 o 395.50 r 246.00 x 383.00 p 189.50 t 103.50 o 71.00 168.50 316.50 415.00 o 938.50 1087.00 2581.50
2003 1047.50 985.19 a 668.00 g 668.00 561.88 c 111.50 k 34.50 n 24.00 k 285.00 572.50 1071.00 1112.00 6303.06
2004 1206.00 1008.50 849.00 593.40 e 449.50 126.50 f 58.00 90.00 355.00 627.00 944.50 1116.50 7297.40
2005 1151.00 952.50 824.50 667.50 437.00 331.00 22.00 i 119.00 0.00 z 0.00 z 0.00 z 1307.00 5789.50
2006 1017.00 689.50 l 478.00 n 0.00 z 432.00 199.00 28.00 107.50 302.00 682.00 937.00 1226.00 4930.50
2007 1383.00 955.00 870.00 663.50 452.00 244.00 13.00 101.50 309.00 683.50 982.50 1190.00 7847.00
2008 1350.00 1012.50 1022.00 860.50 510.50 330.00 93.50 124.50 323.00 673.00 872.00 1326.44 e 8497.94
2009 1290.50 1023.50 1062.00 755.50 455.00 200.50 76.50 81.50 182.50 0.00 z 0.00 z 1361.50 6489.00
2010 1065.50 892.00 843.00 669.00 562.00 273.50 115.00 2.50 z 277.50 587.50 665.50 g 1178.00 6463.00
2011 1190.50 1069.38 b 931.50 843.00 550.00 316.50 122.50 35.00 184.50 579.50 990.50 1188.00 8000.88
2012 303.50 v 1024.00 972.00 642.00 480.00 230.00 45.50 64.14 b 222.50 641.00 135.00 w 1095.50 5416.64
Period of Record Statistics
MEAN 1203.34 985.95 929.61 684.86 461.18 250.46 101.62 113.35 312.47 634.83 935.72 1184.67 7828.11
S.D. 127.79 96.69 90.49 85.90 79.93 60.57 46.40 51.01 91.95 70.55 95.99 115.98 467.27
SKEW 0.49 0.11 0.11 0.06 -0.93 -0.28 0.78 0.11 0.35 -0.18 0.95 0.29 -0.12
MAX 1589.00 1228.50 1185.50 860.50 566.50 356.50 275.50 223.50 514.00 757.00 1292.50 1457.50 8879.50
MIN 910.50 754.00 671.50 495.00 200.50 120.00 13.00 23.00 129.83 462.00 746.90 930.50 6660.62
NO YRS 58 58 57 54 53 56 58 59 53 52 53 57 37