PLYMOUTH, WISCONSIN

Monthly Total Heating Degree Days

(476678)

Base Temperature = 65 F

File last updated on Oct 29, 2012
*** Note *** Provisional Data *** After Year/Month 201210
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
1910 0.00 z 0.00 z 722.50 569.00 452.50 126.00 3.00 12.00 173.50 383.00 1051.50 1398.00 4891.00
1911 1398.00 1088.00 971.00 682.00 214.00 31.50 16.50 42.88 a 167.50 536.00 1052.50 1105.50 7305.38
1912 1974.00 1453.50 1300.00 598.00 309.50 116.50 41.50 80.00 205.50 454.00 837.50 1138.00 8508.00
1913 1389.00 1384.00 1149.00 588.00 363.00 109.00 23.00 23.25 a 214.00 506.16 b 740.50 1020.50 7509.41
1914 1220.00 1484.00 1104.00 696.50 271.00 123.50 6.00 45.00 167.50 322.50 846.50 1481.50 7768.00
1915 1497.00 1063.50 1086.50 416.00 461.90 a 192.41 a 49.71 b 122.00 150.50 440.00 816.50 1260.50 7556.52
1916 1361.50 1433.00 1203.00 639.00 340.48 a 175.00 1.00 24.00 216.72 a 533.00 907.00 1462.00 8295.71
1917 1562.00 1539.50 1075.50 742.00 473.27 a 170.17 a 35.50 57.00 211.50 770.50 826.50 1526.23 a 8989.67
1918 1807.00 1309.00 892.00 729.00 241.59 b 93.10 a 40.00 8.55 b 313.20 e 391.00 789.50 1049.50 7663.44
1919 1253.00 1158.50 990.50 636.50 380.00 33.00 0.00 a 20.67 a 110.36 b 493.50 958.50 1602.18 a 7636.71
1920 1664.50 1371.29 a 1016.50 791.50 349.50 96.21 a 45.47 a 47.00 102.41 a 282.00 895.00 1191.50 7852.87
1921 1220.00 1074.50 883.50 468.00 280.00 60.00 1.03 a 18.60 a 62.00 470.50 982.50 1261.50 6782.13
1922 1477.00 1280.00 993.50 643.50 151.00 51.21 a 17.57 a 26.02 c 149.00 468.50 749.00 1318.50 7324.79
1923 1366.00 1424.00 1274.00 687.50 364.25 a 46.07 b 6.72 a 67.54 c 189.50 533.00 790.00 977.00 7725.57
1924 1707.50 1239.50 1131.00 698.79 a 497.50 150.50 62.00 51.15 a 293.50 344.10 a 886.50 1541.50 8603.54
1925 1419.00 864.00 f 967.72 a 503.50 427.50 90.00 21.00 17.50 123.00 792.50 935.50 1440.39 c 6737.61
1926 1391.00 1159.41 a 1262.22 a 761.00 338.00 172.50 18.50 23.00 219.00 580.00 1046.50 1410.50 8381.62
1927 1484.00 1061.00 892.00 652.24 a 410.75 a 179.50 35.50 68.50 175.86 a 409.50 869.00 1381.00 7618.85
1928 1380.50 1214.50 1054.50 804.00 309.00 184.50 5.88 b 36.34 b 0.00 z 0.00 z 839.00 1172.00 7000.22
1929 1761.83 a 1419.00 939.54 e 600.50 457.52 b 174.83 a 30.00 0.00 z 189.64 b 504.50 1026.72 a 1287.00 8391.08
1930 1608.00 0.00 z 0.00 z 627.50 321.88 a 0.00 z 0.00 z 13.43 a 136.00 572.50 791.00 1229.09 d 5299.41
1931 0.00 z 0.00 z 0.00 z 0.00 z 384.83 b 74.50 1.00 32.50 84.11 b 359.17 b 665.69 a 993.00 2594.80
1932 1166.50 1121.50 1260.50 691.00 297.00 21.00 g 22.22 a 12.50 141.96 b 542.50 984.50 1301.00 7541.18
1933 1100.00 1288.50 1093.50 686.00 307.50 32.68 b 7.23 a 24.05 b 94.50 550.00 984.83 a 1307.00 7475.79
1934 1181.00 1371.50 1141.66 b 671.50 197.00 40.00 23.50 84.00 196.00 424.00 731.00 1361.00 7422.16
1935 1494.00 1186.00 978.00 701.50 462.50 146.50 0.00 a 44.00 183.00 497.00 903.00 1349.00 7944.50
1936 1629.50 1690.00 1010.50 779.00 208.00 113.79 a 4.50 8.00 133.45 a 572.00 963.00 1157.00 8268.74
1937 1409.50 1235.00 1129.00 697.00 310.00 a 102.41 a 12.18 c 4.28 b 199.14 a 592.00 932.50 1375.50 7998.51
1938 1470.50 1081.50 845.00 587.50 326.50 73.00 8.27 a 9.00 170.69 a 344.50 805.50 1254.50 6976.46
1939 1213.81 b 1300.00 1049.00 711.00 248.50 56.00 14.50 3.00 148.00 473.00 801.21 a 1048.50 7066.52
1940 1633.50 1205.50 1203.00 723.62 a 365.80 a 85.50 31.50 63.50 161.90 a 405.00 945.50 1232.50 8056.82
1941 1313.00 1268.50 1192.47 a 464.50 216.50 89.50 10.50 26.00 126.72 a 426.50 766.50 1075.00 6975.69
1942 1415.00 1240.50 931.00 460.50 348.00 97.50 21.50 38.00 262.00 469.50 877.00 1419.00 7579.50
1943 1527.50 1223.00 1185.50 691.00 342.50 91.50 4.50 21.00 247.50 479.00 955.50 1241.00 8009.50
1944 1153.50 1198.00 1160.00 732.50 230.00 62.00 10.50 26.00 144.50 467.00 748.50 1423.00 7355.50
1945 1540.50 1203.00 694.50 584.00 445.00 201.00 38.00 30.00 217.50 531.50 887.50 1437.50 7810.00
1946 1365.00 1228.50 747.00 542.00 385.50 140.50 11.50 46.00 164.00 352.00 806.50 1207.50 6996.00
1947 1292.00 1344.50 1124.00 690.00 455.50 168.00 23.50 7.00 190.50 215.97 a 1041.00 1282.00 7833.97
1948 1584.50 1304.50 1103.50 527.50 379.00 93.50 10.00 7.00 100.50 491.50 757.00 1255.00 7613.50
1949 1316.50 1214.89 a 1060.00 599.50 303.50 57.00 2.00 19.50 240.50 377.50 863.50 1209.00 7263.39
1950 1364.50 1231.00 1209.00 823.00 357.53 a 79.00 40.50 101.00 163.50 347.50 982.50 1489.50 8188.53
1951 1491.50 1215.50 1140.50 669.00 221.50 111.00 16.50 61.50 223.50 470.00 1096.50 1334.50 8051.50
1952 1357.00 1111.50 1120.00 496.00 308.00 58.00 6.50 22.00 149.50 600.00 795.50 1136.50 7160.50
1953 1259.00 1143.00 987.50 687.50 304.00 45.00 13.50 2.00 147.00 306.00 695.50 1157.50 6747.50
1954 1404.00 946.50 1077.50 539.00 423.00 0.00 z 0.00 z 0.00 z 27.50 w 443.50 780.00 1225.00 6838.50
1955 1426.50 1200.50 1088.00 424.50 222.50 69.00 0.00 11.00 141.00 404.50 1010.50 1406.00 7404.00
1956 1329.00 1225.50 1162.50 682.50 344.62 a 68.50 29.00 27.00 230.00 324.00 872.00 1171.50 7466.12
1957 1589.00 1096.50 1019.00 578.50 358.00 70.50 7.00 13.95 a 180.50 509.50 886.50 1160.00 7468.95
1958 1360.00 1368.50 999.00 571.00 305.00 158.50 14.50 22.00 143.50 382.00 803.00 1471.50 7598.50
1959 1615.50 1335.00 1159.50 607.76 a 207.18 a 48.00 18.50 3.00 145.00 600.00 1121.50 1065.00 7925.94
1960 1290.50 1225.50 1314.50 573.62 a 355.50 98.50 34.50 15.50 155.50 471.00 771.72 a 1346.00 7652.34
1961 1417.00 1005.50 960.50 724.00 369.50 68.50 14.00 11.00 148.50 430.50 860.50 1350.50 7360.00
1962 1581.00 1293.50 1072.50 640.00 239.50 101.00 34.50 23.50 230.50 440.50 843.00 1346.00 7845.50
1963 1736.00 1408.00 1002.00 561.50 377.00 67.00 14.00 40.50 173.50 207.00 712.00 1543.50 7842.00
1964 1234.00 1157.50 1081.00 614.00 185.00 112.00 18.00 66.50 207.50 517.00 727.24 a 1346.00 7265.74
1965 1003.00 i 1282.50 1246.00 718.00 232.00 68.50 i 40.00 56.50 191.00 460.00 824.00 1067.50 6117.50
1966 1637.50 1254.50 1011.50 744.50 489.50 92.50 2.50 27.50 184.00 466.50 847.00 1288.50 8046.00
1967 1330.50 1346.00 1001.00 602.00 443.00 43.50 50.00 82.50 210.50 527.00 963.50 1222.50 7822.00
1968 1403.50 1345.50 798.00 548.00 364.00 78.50 28.00 65.00 119.00 451.00 855.50 1294.00 7350.00
1969 1524.00 1161.00 1148.00 568.50 303.00 211.00 34.00 3.50 158.50 558.50 929.50 1286.50 7886.00
1970 1671.50 1259.50 1117.50 557.00 271.00 58.50 9.00 13.50 163.00 421.50 895.50 1302.00 7739.50
1971 1634.50 1265.50 1188.00 656.50 376.50 60.00 18.00 52.50 137.00 300.50 872.00 1183.50 7744.50
1972 1576.50 1371.50 1183.00 739.50 219.00 124.50 39.50 44.00 193.50 602.50 897.00 1400.00 8390.50
1973 1290.00 1163.00 810.50 683.50 384.50 20.50 11.50 22.50 187.00 360.00 892.50 1316.00 7141.50
1974 1414.00 1270.00 1047.00 585.50 422.50 109.00 4.00 22.00 243.00 463.50 802.50 1141.00 7524.00
1975 1319.00 1196.50 1163.50 782.00 201.00 58.00 24.00 15.50 247.00 404.55 a 671.50 1257.50 7340.05
1976 1548.00 1072.00 927.50 547.50 368.50 28.00 2.50 40.50 193.00 618.00 1066.50 1579.50 7991.50
1977 1821.00 1174.50 818.50 441.50 141.50 125.50 5.00 60.00 137.00 511.00 881.00 1364.50 7481.00
1978 1577.50 1381.00 1090.00 691.50 292.50 91.00 37.00 9.50 99.50 490.83 a 865.50 1379.00 8004.83
1979 1743.75 a 1431.00 1036.00 697.50 349.50 97.24 a 18.00 37.00 91.00 533.00 861.50 1090.50 7985.99
1980 1442.50 1297.00 1095.00 569.00 226.00 99.50 5.50 7.50 170.00 590.50 835.50 1294.00 7632.00
1981 1405.00 1077.50 902.00 502.00 316.50 41.00 30.00 21.50 196.00 585.50 0.00 z 1248.50 6325.50
1982 1683.50 1250.50 1063.50 713.00 151.50 157.50 6.00 58.00 187.00 414.50 849.00 1020.00 7554.00
1983 1265.50 1000.00 976.50 717.00 464.00 66.50 7.00 0.00 150.50 442.50 784.00 1613.55 a 7487.05
1984 1490.00 971.00 1192.50 616.00 353.00 30.50 10.00 14.00 177.00 414.50 833.50 1165.00 7267.00
1985 1561.00 1256.00 875.00 464.00 171.50 96.50 9.50 30.00 174.00 472.50 939.50 1573.00 7622.50
1986 1404.00 1230.50 897.50 494.50 241.50 107.50 21.50 38.50 144.00 448.00 945.00 1192.50 7165.00
1987 1264.50 975.50 872.50 450.50 211.50 31.50 15.00 30.50 103.00 606.50 750.00 1101.00 6412.00
1988 1506.50 1334.50 965.50 575.50 198.50 50.00 4.50 15.50 117.93 a 635.00 801.00 0.00 z 6204.43
1989 1139.50 1300.00 1052.50 638.00 322.00 67.50 5.00 18.00 167.50 420.50 944.50 1571.50 7646.50
1990 1094.00 1065.00 873.50 527.00 377.00 51.00 19.50 17.50 122.00 519.50 723.00 1282.00 6671.00
1991 1501.00 1053.00 950.50 513.00 219.00 17.50 11.50 6.50 0.00 z 463.50 1006.00 1179.00 6920.50
1992 1221.00 0.00 z 0.00 z 0.00 z 0.00 z 146.50 63.50 92.50 234.00 578.00 927.50 1247.00 4510.00
1993 1407.50 1291.50 1084.50 748.00 311.00 127.50 12.00 14.00 292.50 588.00 900.50 1223.00 8000.00
1994 1734.50 1429.50 1023.00 607.50 333.50 88.50 31.00 56.50 125.50 443.00 776.00 1123.00 7771.50
1995 1384.50 1260.50 981.50 749.50 341.50 45.00 15.00 0.50 248.00 472.00 1133.50 1411.50 8043.00
1996 1506.50 1364.00 1209.50 743.50 465.50 107.00 34.00 23.50 189.00 504.00 1073.50 1284.50 8504.50
1997 1528.00 1157.50 1054.50 665.50 503.00 74.50 46.00 71.50 149.50 509.50 947.00 1114.00 7820.50
1998 1281.50 935.00 972.00 565.00 196.00 106.50 5.50 5.50 64.00 431.50 719.50 1057.62 a 6339.62
1999 1527.50 1006.00 995.50 533.00 254.50 94.00 2.00 36.50 190.00 508.00 679.50 1219.00 7045.50
2000 1401.50 1072.50 761.50 643.50 276.50 81.50 27.50 27.00 208.00 384.00 894.50 1594.50 7372.50
2001 1324.50 1256.00 1087.00 525.50 264.00 117.93 a 22.00 5.50 197.00 502.50 601.00 1052.00 6954.93
2002 1170.00 1030.50 1133.50 629.00 429.50 80.50 7.00 13.00 89.50 612.00 920.00 1167.50 7282.00
2003 1505.00 1334.00 1028.50 662.50 350.50 116.00 12.50 8.00 167.50 511.00 844.00 1128.00 7667.50
2004 1584.50 1218.50 882.50 576.00 355.50 111.00 40.50 94.00 70.00 434.50 725.00 1189.00 7281.00
2005 1353.00 987.00 1023.50 447.50 303.50 21.00 4.50 12.00 86.50 453.50 836.00 1391.50 6919.50
2006 1069.00 1236.00 1000.00 502.00 312.50 76.50 9.00 12.50 203.00 631.50 777.00 1088.50 6917.50
2007 1259.50 1421.00 894.50 665.50 248.00 59.00 21.50 22.50 143.50 350.00 895.00 1371.00 7351.00
2008 1433.50 1400.80 a 1145.50 597.00 389.00 51.00 10.33 a 26.00 130.50 518.00 890.50 1486.50 8078.64
2009 1703.50 1180.00 1053.50 639.50 292.00 132.50 46.00 51.50 135.50 633.00 698.50 1330.50 7896.00
2010 1426.50 1181.00 882.50 487.50 258.50 42.50 4.50 7.50 205.50 421.50 835.00 1376.00 7128.50
2011 1517.50 1247.00 1114.00 676.50 373.50 113.50 2.50 8.50 219.50 461.00 776.00 1092.00 7601.50
2012 1282.50 1057.50 611.50 618.50 209.50 76.50 0.50 23.50 207.50 208.00 t 0.00 z 0.00 z 4087.50
Period of Record Statistics
MEAN 1440.71 1231.38 1034.51 622.68 321.40 92.30 18.45 31.21 170.35 474.63 865.35 1278.12 7595.79
S.D. 177.49 140.46 137.74 95.23 87.70 44.83 14.97 25.23 50.26 99.92 108.30 154.03 481.10
SKEW 0.28 0.15 -0.49 -0.18 0.05 0.60 0.89 1.22 0.20 0.17 0.24 0.23 0.00
MAX 1974.00 1690.00 1314.50 823.00 503.00 211.00 63.50 122.00 313.20 792.50 1133.50 1613.55 8989.67
MIN 1069.00 935.00 611.50 416.00 141.50 17.50 0.00 0.00 62.00 207.00 601.00 977.00 6339.62
NO YRS 100 98 100 101 102 99 101 101 100 101 101 101 89