PORCUPINE 11 N, SOUTH DAKOTA

Monthly Total Heating Degree Days

(396736)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201204
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
1963 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 33.50 n 0.00 z 721.00 1290.50 2011.50
1964 1128.00 984.00 942.00 492.00 191.50 76.00 0.00 0.00 z 172.00 466.00 865.96 d 1368.81 b 6686.27
1965 1213.81 b 1139.19 a 1272.11 c 309.50 i 251.00 15.50 u 2.67 b 20.15 a 389.00 355.00 779.50 990.85 d 6413.28
1966 1497.00 1222.15 a 858.81 d 683.00 228.88 a 58.45 a 0.00 39.50 141.43 b 455.50 851.50 1199.00 7235.22
1967 1151.00 1016.00 826.50 500.00 442.78 a 114.50 16.50 20.50 131.50 432.00 906.00 1302.00 a 6859.28
1968 1361.00 1049.50 734.38 b 606.00 396.00 71.50 23.00 27.90 a 159.50 415.00 889.50 1376.00 7109.28
1969 1488.50 1027.00 1063.82 a 373.00 212.50 136.50 0.50 0.50 38.00 684.00 762.50 1143.00 6929.82
1970 1410.00 908.44 a 1109.00 667.00 180.83 a 49.00 0.00 0.00 222.50 640.50 844.50 1287.50 7319.28
1971 1397.50 1215.00 937.50 498.50 299.50 19.00 25.50 0.00 240.00 539.00 868.97 a 1251.37 a 7291.83
1972 1422.50 1099.00 794.00 577.00 272.50 37.50 42.00 47.00 148.50 578.50 1051.00 1515.50 7585.00
1973 1323.00 1043.00 783.00 586.50 308.45 a 47.50 11.00 0.00 a 207.50 394.50 962.00 1224.50 6890.95
1974 1410.50 870.00 809.00 492.93 a 266.00 62.50 0.00 30.50 230.17 a 390.00 816.50 1119.50 6497.60
1975 1237.00 1299.50 1040.00 636.50 257.00 67.00 2.50 5.17 a 182.50 443.00 926.00 1062.50 7158.67
1976 1279.50 829.50 887.00 443.50 242.32 a 49.14 a 0.50 6.50 113.50 560.00 1007.00 1146.00 6564.45
1977 1532.00 838.00 850.50 426.72 a 96.00 5.00 1.03 a 16.00 97.00 453.50 861.72 a 1271.50 6448.98
1978 1657.50 1369.00 839.50 531.00 227.00 54.00 2.50 20.00 85.50 439.50 996.50 1507.50 7729.50
1979 1801.00 1322.74 a 873.50 527.00 270.00 66.50 0.00 6.00 65.69 a 415.50 984.00 991.00 7322.93
1980 1356.52 b 1082.50 978.00 490.86 a 210.00 26.00 0.00 2.50 0.00 z 490.50 793.00 1088.62 a 6518.50
1981 1026.00 992.50 757.50 329.00 260.00 37.50 15.50 2.50 85.50 455.00 749.00 1237.00 5947.00
1982 1614.50 1132.00 898.00 610.50 284.50 111.50 2.50 6.00 178.00 539.00 979.50 1192.00 7548.00
1983 1022.50 820.00 875.50 762.00 417.50 87.50 10.00 0.00 136.50 447.50 928.50 1875.50 7383.00
1984 1250.50 884.00 922.00 625.50 314.00 46.50 0.00 0.00 212.00 496.00 826.50 1327.50 6904.50
1985 1356.50 1142.50 837.00 372.50 103.50 81.50 3.50 11.50 250.50 458.00 1410.00 1431.00 7458.00
1986 1112.00 1131.50 618.50 523.50 239.50 8.50 0.00 3.00 185.50 483.50 967.50 1081.50 6354.50
1987 1048.50 867.50 973.50 372.50 119.00 22.00 7.00 20.50 145.50 513.00 727.00 1165.50 5981.50
1988 1412.00 1081.00 851.00 506.00 175.50 7.00 0.00 13.50 122.50 0.00 z 0.00 z 0.00 z 4168.50
1989 0.00 z 0.00 z 0.00 z 593.00 314.13 a 161.00 5.00 11.00 238.00 588.50 954.50 1508.50 4373.63
1990 1080.50 1105.00 929.00 652.50 397.50 70.00 33.00 10.00 133.00 618.50 848.00 1617.50 7494.50
1991 1604.00 930.50 888.50 579.00 302.00 24.50 14.00 3.50 225.00 667.00 1163.00 1177.50 7578.50
1992 1217.00 942.50 813.00 598.00 271.00 115.50 83.50 96.00 209.50 591.50 1089.00 1507.00 7533.50
1993 1599.50 1453.00 978.00 683.00 315.00 167.00 54.00 40.00 349.50 674.00 1185.50 1181.50 8680.00
1994 1431.00 1333.11 a 870.50 641.00 222.00 53.50 40.50 5.00 169.00 551.00 986.00 1190.50 7493.11
1995 1290.50 1005.00 963.00 808.50 447.00 167.50 28.00 14.50 247.50 646.00 1008.50 1299.00 7925.00
1996 1571.50 1160.50 1239.00 671.50 420.50 76.00 23.00 9.00 251.50 604.50 1271.50 1525.50 8824.00
1997 1509.50 1050.50 921.50 818.50 410.50 48.00 34.50 33.50 174.00 568.50 993.00 1190.00 7752.00
1998 1285.00 837.00 1193.00 625.50 267.12 a 196.00 0.00 k 0.50 97.50 543.00 793.50 1185.00 7023.12
1999 1228.50 759.00 809.74 b 630.00 317.00 84.50 29.45 a 17.10 b 285.50 540.00 682.50 1021.89 c 6405.19
2000 1187.50 905.96 d 804.85 d 616.15 d 261.90 b 136.00 7.48 b 2.21 c 0.00 z 0.00 z 0.00 z 0.00 z 3922.06
2001 0.00 z 1284.00 931.03 a 549.60 e 282.00 162.69 d 9.00 2.14 b 116.25 b 536.50 770.69 a 1166.67 e 5810.58
2002 1199.00 976.00 1249.50 590.50 436.00 59.50 0.00 z 26.00 194.50 742.50 842.50 1068.00 7384.00
2003 1209.50 1158.00 906.50 466.50 309.50 129.50 0.00 10.00 235.50 416.50 1060.00 1110.04 e 7011.54
2004 1280.50 1062.50 747.50 493.00 264.00 139.00 22.00 69.00 154.00 448.50 834.50 1024.50 6539.00
2005 1344.50 895.50 865.00 540.00 372.00 64.50 15.50 22.00 126.00 502.50 793.50 1286.50 d 6827.50
2006 896.00 1101.50 942.50 445.00 272.50 24.50 0.00 33.00 284.00 618.00 894.00 1223.35 d 6734.35
2007 1290.50 1266.50 633.50 629.50 208.50 66.50 2.50 22.00 172.00 457.85 e 0.00 z 0.00 z 4749.35
2008 0.00 z 0.00 z 0.00 z 0.00 z 385.00 115.00 14.00 32.00 240.00 593.00 825.00 1364.00 e 3568.00
2009 1258.00 973.50 928.00 714.50 333.50 152.00 33.00 0.00 z 114.00 802.50 724.50 1524.00 7557.50
2010 1377.00 1316.50 920.00 602.00 401.50 92.00 13.50 15.50 172.50 387.50 969.50 1240.00 7507.50
2011 1398.00 1261.50 989.93 a 622.00 416.00 93.00 0.00 5.88 b 165.00 a 479.50 890.00 1196.50 7517.31
2012 1190.50 1113.91 a 550.00 452.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3306.41
Period of Record Statistics
MEAN 1325.15 1069.30 902.24 567.11 289.41 79.57 13.66 16.94 180.31 524.38 914.22 1262.02 7176.17
S.D. 186.72 167.38 148.53 110.20 88.66 48.70 17.47 19.06 71.11 100.19 148.17 182.37 632.94
SKEW 0.17 0.24 0.46 0.02 -0.02 0.54 1.84 2.09 0.59 0.63 1.12 1.01 0.35
MAX 1801.00 1453.00 1272.11 818.50 447.00 196.00 83.50 96.00 389.00 802.50 1410.00 1875.50 8824.00
MIN 896.00 759.00 550.00 329.00 96.00 5.00 0.00 0.00 38.00 355.00 682.50 990.85 5947.00
NO YRS 46 47 47 47 48 47 46 46 46 46 46 46 36