CHARLESTON, ILLINOIS

Monthly Total Cooling Degree Days

(111436)

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
1896 0.00 z 0.00 0.00 a 101.00 183.50 233.00 332.50 308.50 126.00 12.00 0.00 0.00 1296.50
1897 0.00 0.00 0.00 4.00 22.50 228.00 384.50 245.50 235.00 80.50 0.00 0.00 1200.00
1898 0.00 0.00 0.00 2.00 60.50 297.50 384.50 330.50 202.50 42.50 0.00 0.00 1320.00
1899 0.00 0.00 0.00 44.00 90.50 305.50 360.00 399.50 181.00 65.50 0.00 0.00 1446.00
1900 0.00 0.00 0.00 4.50 141.50 210.50 0.00 z 448.00 222.00 69.00 0.00 0.00 1095.50
1901 0.00 0.00 0.00 a 0.00 z 72.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 a 72.00
1902 0.00 0.00 0.00 17.50 178.50 220.34 a 383.50 229.50 83.50 16.00 4.50 0.00 a 1133.34
1903 0.00 0.00 8.50 12.93 a 171.50 109.00 360.50 257.62 b 136.50 37.00 0.00 0.00 1093.55
1904 0.00 0.00 0.50 4.00 70.00 185.00 289.50 246.50 152.50 16.50 0.00 0.00 964.50
1905 0.00 0.00 5.00 10.50 92.00 286.55 a 299.00 345.50 154.00 28.00 0.00 0.00 1220.55
1906 0.50 0.00 0.00 a 28.00 121.00 188.50 266.00 360.50 188.50 7.00 0.00 0.00 1160.00
1907 0.00 0.00 38.50 0.00 37.00 138.50 348.50 244.00 110.69 a 14.00 0.00 0.00 931.19
1908 0.00 0.00 1.50 7.50 135.50 215.00 333.25 a 302.50 217.50 28.50 0.00 a 0.00 a 1241.25
1909 0.00 0.00 0.00 11.00 36.50 253.00 250.50 359.50 109.50 4.00 3.00 0.00 1027.00
1910 0.00 0.00 20.50 17.00 21.50 203.50 313.50 231.47 a 107.00 41.00 0.00 0.00 955.47
1911 0.00 0.00 0.00 0.00 231.47 a 337.00 366.50 289.50 194.50 17.00 2.50 0.00 1438.47
1912 0.00 0.00 0.00 7.00 108.50 125.69 a 334.00 248.50 184.00 33.67 b 0.00 a 0.00 a 1041.36
1913 0.00 e 0.00 a 0.00 a 10.00 117.80 a 354.83 a 461.00 0.00 z 0.00 z 10.50 f 3.10 a 0.00 946.73
1914 0.00 0.00 0.00 25.86 a 143.50 419.50 480.50 368.50 122.50 25.50 0.00 0.00 c 1585.86
1915 0.00 0.00 0.00 50.69 a 33.58 a 134.00 167.50 g 122.50 184.50 16.61 c 3.00 0.00 a 544.88
1916 0.00 0.00 0.00 3.00 120.50 110.50 487.00 407.50 128.50 18.00 0.00 0.00 1275.00
1917 0.00 0.00 1.00 17.00 43.52 e 175.50 322.00 213.50 81.00 6.50 0.00 0.00 860.02
1918 0.00 0.00 0.55 c 0.00 d 193.75 c 266.50 273.00 444.00 18.50 12.00 0.00 0.00 b 1208.30
1919 0.00 0.00 c 0.00 9.50 59.50 330.50 441.50 277.00 195.50 74.50 0.00 0.00 a 1388.00
1920 0.00 0.00 1.50 0.00 64.50 229.00 313.50 273.00 179.00 54.25 a 0.00 0.00 1114.75
1921 0.00 0.00 12.00 17.14 b 145.50 363.50 486.00 283.50 232.50 2.00 0.00 0.00 1542.14
1922 0.00 0.00 0.00 10.00 92.00 280.50 324.00 322.00 233.50 62.00 0.00 a 0.00 1324.00
1923 0.00 0.00 0.00 2.07 a 46.50 252.00 367.35 a 308.50 120.50 1.50 0.00 0.00 1098.42
1924 0.00 0.00 0.00 21.21 a 6.00 213.50 251.00 310.50 63.50 26.72 b 3.50 0.00 895.93
1925 0.00 0.00 0.50 51.50 66.50 330.00 343.50 287.50 303.50 18.50 0.00 0.00 1401.50
1926 0.00 0.00 0.00 n 1.50 123.00 125.50 415.00 372.50 210.00 37.00 0.00 0.00 1284.50
1927 0.00 d 0.00 a 0.00 15.52 a 64.50 127.50 312.00 147.00 274.00 41.00 1.00 0.00 982.52
1928 0.00 0.00 0.00 4.66 a 54.77 a 97.50 379.50 369.00 118.50 f 34.50 0.00 0.00 939.92
1929 0.00 0.00 8.78 a 39.00 91.50 205.50 403.55 c 251.21 b 141.72 a 4.00 0.00 0.00 1145.27
1930 0.00 0.00 0.00 49.00 86.00 241.50 478.00 372.00 198.50 42.48 d 2.07 a 0.00 1469.55
1931 0.00 0.00 0.00 24.50 61.00 352.00 477.00 321.50 276.50 59.50 6.50 0.00 1578.50
1932 0.00 0.00 0.00 5.00 93.50 303.00 433.00 346.17 a 150.00 16.50 0.00 0.00 1347.17
1933 0.00 0.00 1.50 9.00 122.50 432.50 461.50 295.50 315.50 18.50 5.00 0.00 1661.50
1934 0.00 0.00 0.00 5.50 147.50 472.50 542.50 339.00 110.50 14.00 1.00 0.00 1632.50
1935 0.00 a 0.00 4.50 5.50 31.50 150.50 450.50 370.50 140.00 28.00 0.00 0.00 1181.00
1936 0.00 0.00 0.00 a 11.00 132.50 274.50 609.50 501.50 237.50 10.50 0.50 0.00 1777.50
1937 0.00 0.00 0.00 6.00 102.00 221.00 304.00 367.00 128.00 22.50 0.00 0.00 1150.50
1938 0.00 0.00 3.50 25.00 77.00 193.50 368.50 366.00 220.34 a 47.00 1.00 0.00 1301.84
1939 0.00 0.00 5.00 5.00 135.00 290.00 360.50 255.50 261.00 57.00 0.00 0.00 1369.00
1940 0.00 0.00 0.50 8.50 50.50 268.00 381.50 366.50 125.50 39.50 0.00 0.00 1240.50
1941 0.00 0.00 0.00 26.50 162.50 290.00 375.50 350.00 200.50 46.50 0.00 0.00 1451.50
1942 0.00 0.00 6.00 45.00 90.00 273.50 360.50 273.00 193.00 25.50 4.00 0.00 1270.50
1943 0.00 0.00 1.50 6.00 56.00 344.50 407.00 420.50 104.00 7.00 0.00 0.00 1346.50
1944 0.00 0.00 0.00 2.50 209.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 m 0.00 b 211.50
1945 0.00 0.00 5.50 3.00 24.00 135.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 168.00
1946 0.00 t 0.00 1.50 25.00 16.50 268.50 347.00 178.00 119.50 36.50 0.00 0.00 992.50
1947 0.00 0.00 0.00 5.00 36.00 168.00 239.50 534.00 204.00 53.00 0.00 0.00 1239.50
1948 0.00 0.00 0.00 40.50 36.50 236.90 a 332.98 b 312.00 170.00 1.55 a 0.00 0.00 b 1130.43
1949 0.00 0.00 0.00 1.61 b 112.24 b 249.00 f 470.34 b 299.27 e 49.00 40.82 a 1.00 0.00 b 974.28
1950 1.72 d 0.00 b 0.00 9.31 a 99.31 d 234.81 d 257.41 c 216.43 d 55.50 m 50.00 9.60 e 0.00 878.59
1951 0.00 0.00 0.00 f 32.31 d 0.00 z 149.00 f 337.68 c 237.00 f 62.31 d 57.19 b 0.00 b 0.00 489.48
1952 0.00 0.00 0.00 10.00 78.61 c 399.00 417.31 e 275.56 d 41.00 u 0.00 e 1.07 b 0.00 1181.54
1953 0.00 0.00 0.00 0.00 e 70.86 c 378.89 c 262.50 l 323.29 c 187.50 d 54.00 0.00 0.00 1014.53
1954 0.00 0.00 a 0.00 32.14 b 33.21 c 373.50 484.00 335.50 242.00 72.50 0.00 0.00 1572.86
1955 0.00 a 0.00 0.00 16.00 77.00 125.50 457.00 380.00 171.35 d 9.62 b 0.00 0.00 1236.47
1956 0.00 0.00 0.00 11.50 118.00 268.00 282.00 289.00 111.50 23.00 0.00 a 0.00 1103.00
1957 0.00 0.00 0.00 a 45.00 52.18 a 226.00 347.00 288.50 94.50 1.00 0.00 0.00 a 1054.18
1958 0.00 b 0.00 0.00 a 2.50 42.00 101.00 259.00 272.50 129.50 19.24 b 2.50 0.00 828.24
1959 0.00 0.00 0.00 3.62 a 138.50 285.60 e 264.50 f 373.50 153.62 a 23.00 0.00 0.00 977.84
1960 0.00 a 0.00 0.00 a 30.54 b 50.50 206.50 306.50 367.50 257.50 25.00 0.00 0.00 1244.04
1961 0.00 0.00 a 0.00 10.00 30.50 205.00 345.00 281.50 239.50 19.50 2.14 b 0.00 1133.14
1962 0.00 0.00 0.00 25.00 224.00 263.50 311.50 310.00 117.50 61.50 0.00 0.00 1313.00
1963 0.00 0.00 2.50 27.00 53.50 298.50 324.00 249.50 147.50 104.50 0.00 0.00 1207.00
1964 0.00 0.00 0.00 8.50 148.00 327.00 373.00 320.00 179.50 3.00 3.50 0.00 1362.50
1965 0.00 0.00 0.00 27.50 178.50 222.50 305.00 280.00 165.00 21.00 0.00 0.00 1199.50
1966 0.00 0.00 2.00 0.50 57.50 258.50 495.50 273.00 105.00 3.00 0.00 0.00 1195.00
1967 0.00 0.00 a 5.00 41.00 64.50 278.50 283.00 186.50 100.00 25.50 0.00 0.00 984.00
1968 0.00 0.00 2.00 2.50 46.00 304.50 356.50 353.50 134.50 35.00 1.50 0.00 1236.00
1969 0.00 0.00 0.00 12.50 110.00 219.00 407.50 280.50 101.50 29.97 a 0.00 0.00 1160.97
1970 0.00 0.00 0.00 33.00 138.00 225.00 356.00 311.00 101.50 s 6.64 c 0.00 0.00 1069.64
1971 0.00 0.00 0.00 a 4.00 39.35 e 350.50 247.00 248.50 201.50 40.09 b 1.00 0.00 h 1131.93
1972 0.00 0.00 0.00 10.00 125.00 196.00 318.50 295.00 172.00 0.00 0.00 0.00 1116.50
1973 0.00 0.00 0.00 8.00 25.00 g 253.00 374.00 329.00 192.00 69.50 0.00 b 0.00 f 1225.50
1974 0.00 a 0.00 17.00 15.00 75.00 139.00 390.50 244.50 36.72 a 9.00 2.00 0.00 928.72
1975 0.00 0.00 a 0.00 3.50 110.00 268.00 279.00 322.00 88.50 19.63 a 1.55 a 0.00 1092.19
1976 0.00 b 0.00 0.50 34.00 27.00 191.00 343.00 204.00 88.50 17.50 0.00 0.00 905.50
1977 0.00 a 0.00 0.00 a 56.00 199.00 197.00 417.50 274.00 158.50 0.00 0.00 0.00 1302.00
1978 0.00 0.00 0.00 5.50 76.50 244.00 332.00 255.00 208.50 1.50 1.00 0.00 1124.00
1979 0.00 0.00 0.00 1.50 66.13 a 235.00 273.00 276.00 132.50 32.55 a 0.00 0.00 1016.68
1980 0.00 0.00 0.00 16.00 74.50 217.00 471.00 407.50 163.97 a 18.00 0.00 a 0.00 1367.97
1981 0.00 0.00 0.00 36.00 24.50 279.50 336.00 234.50 86.50 10.00 0.00 0.00 e 1007.00
1982 0.00 0.00 0.00 1.50 132.50 89.50 337.50 213.00 98.00 41.00 4.00 1.00 918.00
1983 0.00 0.00 2.50 3.50 13.50 237.00 434.00 448.00 195.00 22.00 0.00 0.00 1355.50
1984 0.00 0.00 0.00 8.50 40.00 339.00 291.00 331.00 126.00 36.50 0.00 0.00 1172.00
1985 0.00 0.00 6.50 51.50 94.50 178.50 319.00 205.00 181.00 31.00 0.00 0.00 1067.00
1986 0.00 0.00 13.00 32.50 112.50 290.00 413.50 196.50 195.50 17.00 0.00 0.00 1270.50
1987 0.00 0.00 0.00 17.50 184.50 313.00 362.00 349.00 149.00 0.00 7.50 0.00 1382.50
1988 0.00 0.00 0.00 0.00 89.50 284.50 416.50 431.00 186.00 4.50 0.00 0.00 1412.00
1989 0.00 0.00 0.00 25.00 56.50 208.00 319.00 265.00 82.50 29.50 0.00 0.00 985.50
1990 0.00 0.00 17.00 32.00 12.00 237.00 298.50 217.50 167.50 19.00 0.00 0.00 1000.50
1991 0.00 0.00 0.50 18.50 200.00 294.00 357.50 321.00 208.50 33.50 0.50 0.00 1434.00
1992 0.00 0.00 0.00 7.50 96.50 176.00 310.00 164.50 112.00 9.50 0.00 0.00 876.00
1993 0.00 0.00 0.00 2.50 82.00 265.00 415.50 349.00 56.50 7.50 0.00 0.00 1178.00
1994 0.00 a 0.00 0.00 a 26.50 48.00 320.00 306.50 217.00 107.50 20.00 0.00 0.00 1045.50
1995 0.00 0.00 0.00 11.50 35.50 251.50 405.50 462.50 101.50 14.50 0.00 0.00 1282.50
1996 0.00 0.00 0.00 6.00 108.50 260.00 290.50 302.50 92.50 16.50 0.00 0.00 1076.50
1997 0.00 0.00 0.00 0.50 22.50 211.00 350.50 230.00 129.50 67.50 0.00 0.00 1011.50
1998 0.00 0.00 16.50 4.50 138.50 280.50 338.50 347.50 252.00 13.50 0.00 1.00 1392.50
1999 0.00 a 0.00 0.00 6.50 58.00 257.50 466.50 242.50 131.00 14.00 1.50 0.00 a 1177.50
2000 0.00 0.00 2.00 0.00 88.50 219.50 265.00 320.33 a 135.50 31.50 4.00 0.00 1066.33
2001 0.00 a 0.00 0.00 74.00 121.00 203.00 361.00 316.00 119.50 14.00 0.00 0.00 1208.50
2002 0.00 0.00 0.00 58.00 58.50 315.50 455.00 360.50 216.00 43.00 0.00 0.00 1506.50
2003 0.00 0.00 0.00 21.00 38.50 170.00 342.50 321.00 86.50 11.00 9.50 0.00 1000.00
2004 0.00 0.00 0.00 31.00 181.00 214.00 267.50 199.50 139.50 16.00 0.00 0.00 1048.50
2005 0.00 0.00 1.00 19.00 65.00 301.00 386.00 382.00 228.50 41.50 2.00 0.00 1426.00
2006 0.00 0.00 3.00 33.50 96.00 218.50 405.00 323.50 76.50 33.50 0.00 0.00 1189.50
2007 0.00 0.00 30.50 19.50 170.50 279.50 261.50 470.00 204.50 98.50 0.00 0.00 z 1534.50
2008 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 0.00 z 0.00 z 0.00 0.00
2009 0.00 0.00 1.00 r 37.50 67.50 303.33 c 229.29 b 254.50 93.50 0.00 0.00 0.00 985.63
2010 0.00 0.00 0.00 41.00 145.50 355.50 432.50 430.50 184.50 26.50 0.00 0.00 1616.00
2011 0.00 0.00 a 6.20 a 21.00 e 136.29 b 311.38 a 513.88 e 380.00 126.50 26.87 a 0.00 a 0.00 a 1522.12
2012 0.00 0.00 70.04 d 27.50 229.29 b 283.45 a 602.00 337.38 a 116.38 a 5.50 j 0.00 z 0.00 z 1666.04
Period of Record Statistics
MEAN 0.02 0.00 2.89 17.98 92.74 249.16 366.11 309.17 155.78 28.06 0.85 0.02 1217.59
S.D. 0.17 0.00 8.67 17.68 53.98 75.42 77.11 75.76 59.64 21.93 1.86 0.13 204.42
SKEW 9.53 0.00 5.28 1.59 0.64 0.16 0.68 0.29 0.27 1.07 2.83 7.28 0.37
MAX 1.72 0.00 70.04 101.00 231.47 472.50 609.50 534.00 315.50 104.50 9.60 1.00 1777.50
MIN 0.00 0.00 0.00 0.00 6.00 89.50 229.29 122.50 18.50 0.00 0.00 0.00 828.24
NO YRS 114 116 113 115 114 112 109 111 108 111 113 112 94