MT RUSHMORE NATL MEM, SOUTH DAKOTA

Monthly Total Heating Degree Days

(395870)

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
1962 0.00 z 1057.00 b 1027.00 553.50 332.00 160.50 42.00 53.50 228.50 431.50 756.96 b 1059.50 5701.96
1963 1552.00 945.26 a 812.00 640.50 373.50 108.00 12.00 25.50 55.80 e 242.00 753.00 1215.50 6735.06
1964 1122.50 1127.50 1151.50 690.50 353.00 168.50 2.50 110.00 224.50 411.50 875.50 1196.00 7433.50
1965 1044.00 1088.50 1386.50 626.50 426.00 163.50 18.50 68.50 573.00 351.00 730.00 948.00 7424.00
1966 1392.00 1092.00 850.00 820.00 309.00 141.00 5.50 128.00 184.50 508.50 860.00 1116.50 7407.00
1967 1109.50 1017.00 939.00 670.50 565.00 235.50 11.88 a 24.28 a 179.00 468.50 881.50 1276.50 7378.17
1968 1134.00 1029.00 793.50 732.00 513.00 147.50 32.50 98.00 205.50 420.00 933.50 1331.50 7370.00
1969 1336.10 a 1014.50 1140.50 495.00 294.50 264.50 7.50 8.00 67.00 784.50 777.50 1055.00 7244.60
1970 1298.50 912.50 1152.68 a 815.50 298.50 67.00 8.00 2.00 248.00 665.00 928.50 1140.50 7536.68
1971 1312.00 1085.00 1061.50 685.00 441.00 81.00 54.50 3.00 253.00 f 648.86 b 992.07 a 1204.50 7568.43
1972 1502.50 990.00 821.50 707.00 398.00 108.00 85.50 56.00 223.00 578.00 962.50 1353.50 7785.50
1973 1147.50 914.50 890.06 e 746.50 410.50 123.50 46.00 5.00 266.50 443.50 939.50 1111.50 7044.56
1974 1251.50 879.00 876.50 613.00 387.00 108.50 0.50 64.58 a 241.50 387.50 861.00 1044.50 6715.08
1975 1221.50 1137.00 1118.00 789.00 0.00 z 165.50 11.50 41.00 207.50 442.50 899.50 979.00 7012.00
1976 1170.00 874.50 1005.95 a 616.00 244.50 g 122.50 15.00 18.00 152.50 621.50 960.50 1058.00 6614.45
1977 1413.00 880.00 980.00 516.50 227.50 50.17 a 15.50 b 83.00 169.50 466.50 921.50 1238.50 6961.67
1978 1444.50 1222.00 874.00 720.00 436.50 129.50 52.70 a 70.50 170.50 470.00 1012.00 1410.50 8012.70
1979 1599.50 1112.50 933.50 753.00 465.00 190.50 33.00 77.00 72.00 490.50 990.00 899.50 7616.00
1980 1328.50 1067.00 1034.37 a 631.00 405.00 100.00 5.50 71.96 c 190.00 541.00 803.79 a 980.12 a 7158.24
1981 939.00 1001.00 819.50 473.50 469.00 131.00 37.50 20.50 141.00 573.00 663.10 a 1145.50 6413.60
1982 1449.00 1054.00 998.00 764.00 458.00 259.00 13.00 35.50 254.50 623.50 977.50 1107.50 7993.50
1983 995.50 811.00 966.00 852.50 522.50 181.50 13.00 0.00 225.00 522.50 907.50 1600.00 7597.00
1984 1115.50 904.50 1027.50 763.50 459.00 176.00 18.00 3.50 367.50 616.50 803.50 1203.00 7458.00
1985 1291.00 1140.00 888.00 480.00 176.50 182.00 26.50 51.15 a 354.50 588.50 1343.50 1254.50 7776.15
1986 868.00 1039.50 712.50 685.00 394.50 63.50 22.50 26.50 387.50 553.50 956.50 1014.50 6724.00
1987 1063.00 901.00 996.00 442.00 271.00 79.00 27.00 101.50 201.50 561.50 761.00 1107.50 6512.00
1988 1250.00 1090.50 560.00 l 562.00 296.50 30.50 22.50 26.50 201.00 517.50 892.00 1074.50 5963.50
1989 1055.50 1423.00 1010.00 675.00 355.50 168.00 19.50 18.00 234.50 557.00 883.50 1341.00 7740.50
1990 685.00 i 1021.00 951.00 688.00 491.00 130.00 70.50 17.50 131.00 566.50 712.50 1374.00 6153.00
1991 1308.00 788.50 893.00 685.00 376.50 73.00 24.00 13.00 211.00 597.50 1040.50 956.00 6966.00
1992 968.00 832.50 827.00 596.50 338.50 201.50 177.50 148.00 209.00 562.50 1030.86 a 1325.00 7216.86
1993 1269.00 1232.50 929.00 772.50 405.00 262.00 135.50 103.50 410.00 642.50 1087.00 1079.00 8327.50
1994 1242.00 1244.00 904.00 680.00 266.00 88.00 51.50 50.00 148.50 588.00 918.50 991.00 7171.50
1995 1051.00 987.50 998.00 906.00 610.00 235.50 51.50 12.50 301.50 653.00 887.50 1086.00 7780.00
1996 1397.50 1058.50 1228.00 688.00 594.00 105.50 46.00 20.87 e 327.50 616.50 1134.50 1271.50 8488.37
1997 1317.00 1026.50 884.00 904.50 569.22 b 105.50 77.00 94.50 172.50 528.00 928.50 1056.00 7663.22
1998 1156.00 883.00 1137.00 670.00 380.00 331.00 27.00 23.00 137.00 596.00 838.97 a 1181.00 7359.97
1999 1141.00 867.50 870.50 811.50 470.50 201.00 49.00 21.00 331.50 485.00 546.50 992.50 6787.50
2000 1122.00 855.50 868.00 699.00 358.50 193.00 28.00 8.50 196.50 514.50 1149.00 1338.00 7330.50
2001 1047.00 1227.50 966.50 649.00 398.50 195.00 10.50 1.50 207.50 599.00 663.62 a 1118.50 7084.12
2002 1177.00 948.50 1326.00 756.50 565.50 106.00 8.00 51.00 260.50 0.00 z 838.00 1006.50 7043.50
2003 1101.50 1160.00 1008.50 639.00 447.50 236.00 0.50 30.00 279.50 422.00 1050.00 1026.10 a 7400.60
2004 1153.50 1000.00 835.00 614.00 435.50 244.00 61.00 105.50 249.50 555.00 862.50 1044.00 7159.50
2005 1191.00 903.50 963.00 649.00 513.00 148.00 34.50 71.50 159.00 504.00 797.50 1218.00 7152.00
2006 924.66 b 1124.00 995.50 552.50 358.50 60.50 4.00 70.00 331.50 704.00 836.50 1048.50 7010.16
2007 1243.00 1174.50 727.50 786.00 315.50 85.00 7.50 41.50 212.00 512.00 826.50 1229.50 7160.50
2008 1281.50 1094.00 1038.50 0.00 z 0.00 z 214.66 a 25.50 45.00 281.50 624.00 809.00 1372.00 6785.66
2009 1168.00 1002.50 941.00 793.50 427.00 264.50 62.50 86.00 170.50 925.00 681.21 a 1447.59 c 7969.30
2010 1095.50 1170.50 812.50 689.00 577.50 199.00 50.00 22.50 172.00 412.00 968.00 1102.00 7270.50
2011 1271.00 1179.11 a 990.50 767.00 580.00 167.00 14.50 28.00 183.50 519.00 892.00 1091.00 7682.61
2012 1093.50 1125.50 567.00 542.50 401.00 69.50 5.50 22.00 102.00 647.00 743.50 1112.00 6431.00
2013 1135.50 1008.00 1010.00 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 3153.50
Period of Record Statistics
MEAN 1205.20 1033.15 959.54 681.15 414.92 153.35 32.96 46.62 224.22 545.18 887.64 1155.54 7336.03
S.D. 161.21 130.26 146.97 107.84 100.60 67.60 33.20 37.00 93.18 111.87 139.00 148.83 470.61
SKEW 0.31 0.33 0.41 -0.16 0.02 0.36 2.29 0.77 1.14 0.41 0.44 0.70 0.15
MAX 1599.50 1423.00 1386.50 906.00 610.00 331.00 177.50 148.00 573.00 925.00 1343.50 1600.00 8488.37
MIN 868.00 788.50 567.00 442.00 176.50 30.50 0.50 0.00 55.80 242.00 546.50 899.50 6413.60
NO YRS 50 52 51 50 48 51 51 51 50 50 51 51 43