CAIRO 3 N, ILLINOIS

Monthly Total Heating Degree Days

(111166)

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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 a 13.50 209.50 439.00 686.13 a 1348.13
1949 743.00 621.92 b 522.00 219.00 8.00 0.00 0.00 0.00 53.50 134.00 464.48 a 667.00 3432.91
1950 634.00 636.00 621.00 285.50 32.00 0.50 0.00 0.00 22.00 61.50 672.50 962.50 3927.50
1951 842.50 688.50 553.50 316.50 32.00 3.00 0.00 0.00 25.00 158.00 688.50 750.50 4058.00
1952 718.50 585.50 529.50 230.00 49.00 0.00 0.00 0.00 5.00 316.00 490.50 746.00 3670.00
1953 741.50 600.00 389.50 302.00 50.00 0.00 0.00 0.00 5.00 131.50 486.50 798.00 3504.00
1954 873.50 499.00 539.00 103.50 107.00 3.00 0.00 0.00 4.00 216.00 472.50 776.00 3593.50
1955 846.50 686.00 498.00 76.00 3.00 11.00 0.00 0.00 0.00 189.50 571.00 862.00 3743.00
1956 951.00 622.00 488.50 240.50 36.50 6.50 0.00 0.00 6.00 53.00 513.50 614.50 3532.00
1957 992.50 562.00 518.00 175.00 38.00 2.00 0.00 0.00 7.50 234.00 511.50 634.50 3675.00
1958 942.00 958.50 689.00 196.50 49.50 0.00 0.00 0.00 19.50 162.00 435.50 949.00 4401.50
1959 955.00 700.50 494.50 194.50 26.50 0.00 0.00 0.00 3.00 200.50 664.50 694.50 3933.50
1960 827.00 833.00 920.50 153.50 100.50 0.00 0.00 0.00 0.50 148.00 490.00 955.00 4428.00
1961 993.50 618.00 423.50 342.50 86.00 3.50 0.00 0.00 17.50 162.50 523.00 820.00 3990.00
1962 992.00 635.00 638.50 272.00 4.50 0.00 0.00 0.00 31.50 136.00 515.50 916.50 4141.50
1963 1140.00 900.50 362.50 153.50 50.00 0.00 0.00 0.00 12.50 37.00 415.00 1099.50 4170.50
1964 818.00 765.00 514.50 127.00 21.50 0.00 0.00 1.50 22.50 215.00 413.50 784.00 3682.50
1965 833.00 721.50 780.00 152.00 4.50 0.00 0.00 0.00 26.50 200.00 353.00 615.50 3686.00
1966 1050.50 761.00 459.50 258.50 81.00 2.00 0.00 0.00 32.00 256.00 440.00 826.50 4167.00
1967 779.00 838.50 387.50 132.50 70.00 4.00 0.00 2.00 39.50 181.00 569.50 761.50 3765.00
1968 981.50 913.00 521.50 167.00 50.50 0.00 0.00 0.00 4.00 202.50 500.00 856.00 4196.00
1969 910.00 708.50 708.00 182.00 28.00 0.00 0.00 0.00 3.00 212.50 575.50 900.00 4227.50
1970 1105.00 808.50 654.00 147.00 26.50 0.00 0.00 0.00 12.50 170.50 524.00 691.50 4139.50
1971 976.00 744.50 605.50 210.50 67.50 0.00 0.00 0.00 10.50 31.50 479.00 571.50 3696.50
1972 890.00 732.50 500.50 199.50 27.00 0.50 0.00 0.00 17.50 225.50 602.50 883.50 4079.00
1973 889.50 753.50 306.00 265.00 53.50 0.00 0.00 0.00 18.00 110.00 366.00 860.50 3622.00
1974 838.00 661.00 405.00 212.50 31.00 2.00 0.00 0.00 70.00 176.00 472.00 804.50 3672.00
1975 799.50 703.50 638.50 228.50 2.00 0.00 0.00 0.00 72.50 150.00 410.00 738.50 3743.00
1976 938.00 463.50 332.50 189.00 88.00 0.00 0.00 0.00 6.50 313.50 731.50 906.50 3969.00
1977 1320.00 722.00 320.00 113.50 14.00 0.00 0.00 0.00 0.50 211.00 428.50 854.00 3983.50
1978 1220.50 1053.00 674.50 121.50 84.00 0.00 0.00 0.00 0.00 201.50 395.00 810.50 4560.50
1979 1254.00 971.50 520.00 232.00 64.50 0.00 0.00 0.00 5.50 139.00 501.00 734.00 4421.50
1980 863.00 903.50 623.00 223.50 29.50 0.00 0.00 0.00 15.50 245.50 505.50 780.00 4189.00
1981 965.00 675.50 496.00 61.50 86.00 0.00 0.00 0.00 30.50 247.00 438.50 860.00 3860.00
1982 1056.50 794.00 413.50 286.00 6.50 0.00 0.00 0.00 41.50 207.00 467.00 600.00 3872.00
1983 901.50 644.00 505.00 355.00 34.00 0.00 0.00 0.00 49.00 143.00 439.00 1125.50 4196.00
1984 1112.00 624.00 634.00 239.50 50.50 0.00 0.00 0.00 74.50 107.00 559.50 595.00 3996.00
1985 1216.00 850.00 354.00 118.00 21.00 3.50 0.00 0.00 66.00 155.00 436.00 976.50 4196.00
1986 889.00 706.00 452.50 137.50 21.50 0.00 0.00 7.00 2.50 182.00 612.50 874.00 3884.50
1987 932.00 647.00 402.50 199.00 1.50 0.00 0.00 0.00 14.50 0.00 z 0.00 z 0.00 z 2196.50
1988 0.00 z 0.00 z 0.00 z 0.00 z 60.00 11.00 0.00 0.00 22.50 381.50 534.00 871.00 1880.00
1989 785.00 934.00 587.50 265.50 112.00 0.00 z 0.00 2.00 67.50 204.08 a 544.00 1229.50 4731.08
1990 0.00 z 572.50 484.50 313.00 94.50 6.50 2.50 2.50 23.50 298.50 435.50 824.00 3057.50
1991 1024.00 698.00 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 0.00 z 1722.00
1992 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 11.00 0.00 3.50 57.50 261.50 516.00 844.50 1694.00
1993 893.00 836.50 671.50 278.50 40.50 9.50 0.00 0.00 42.00 255.00 582.00 800.00 4408.50
1994 1111.50 740.50 530.00 209.00 23.50 i 0.00 0.00 0.00 47.00 188.00 385.50 731.50 3943.00
1995 911.50 769.50 460.00 245.00 81.00 0.50 0.00 0.00 26.00 62.50 619.04 d 851.35 d 4026.39
1996 929.43 d 742.52 e 736.50 302.50 45.50 1.50 0.00 0.00 0.00 z 197.50 649.50 761.50 4366.45
1997 1058.00 635.00 427.50 351.50 101.61 d 8.50 0.00 0.00 18.00 259.00 621.50 823.00 4303.61
1998 812.09 c 582.00 584.50 225.50 15.00 7.00 0.00 0.00 0.00 151.00 460.00 768.00 3605.09
1999 896.50 565.00 659.00 156.00 23.00 0.00 0.00 0.00 26.50 216.00 350.50 765.50 3658.00
2000 899.00 630.50 449.50 294.50 26.00 6.50 0.00 0.00 54.00 154.50 632.50 1206.50 4353.50
2001 1021.50 681.00 691.00 160.50 29.50 5.00 0.00 0.00 55.00 243.00 411.00 712.00 4009.50
2002 828.00 706.50 609.50 186.00 71.00 0.00 0.00 0.00 8.50 278.50 613.50 873.00 4174.50
2003 1121.50 866.50 508.50 183.50 35.00 22.50 0.00 0.00 41.50 200.00 421.50 826.50 4227.00
2004 972.50 837.50 416.00 252.00 48.50 0.00 0.00 10.85 a 8.50 155.50 405.50 922.50 4029.35
2005 773.00 617.00 596.00 208.50 100.50 0.00 0.00 0.00 11.00 263.50 465.00 957.00 3991.50
2006 673.00 838.50 529.00 127.00 70.00 0.00 0.00 0.00 55.00 318.00 534.00 746.50 3891.00
2007 870.50 918.00 333.50 310.00 25.00 0.00 0.00 0.00 6.00 171.50 522.00 815.00 3971.50
2008 992.50 823.91 a 580.50 276.50 67.50 0.00 0.00 0.00 6.50 242.00 612.00 898.00 4499.41
2009 1024.79 e 516.00 f 467.00 284.00 52.00 4.50 0.00 0.00 10.50 305.50 408.50 909.50 3466.29
2010 1074.50 890.00 527.00 38.50 l 0.00 z 0.00 z 0.00 u 0.00 14.00 156.50 460.00 1057.00 4179.00
2011 1060.00 773.23 b 521.83 a 159.83 a 90.93 a 0.00 e 0.00 j 0.00 a 31.50 203.00 354.64 b 720.75 c 3915.72
2012 688.64 c 613.83 b 173.50 148.80 e 1.55 a 6.00 0.00 c 0.00 41.50 151.50 l 0.00 z 0.00 z 1673.83
Period of Record Statistics
MEAN 936.89 730.88 523.60 212.60 47.12 2.28 0.04 0.46 24.37 193.50 501.78 826.70 3983.73
S.D. 144.18 124.68 129.27 70.44 30.84 4.13 0.32 1.70 21.16 70.23 90.40 136.72 283.19
SKEW 0.35 0.33 0.20 0.06 0.38 2.55 7.68 4.70 0.84 -0.04 0.47 0.71 0.05
MAX 1320.00 1053.00 920.50 355.00 112.00 22.50 2.50 10.85 74.50 381.50 731.50 1229.50 4560.50
MIN 634.00 463.50 173.50 61.50 1.50 0.00 0.00 0.00 0.00 31.50 350.50 571.50 3432.91
NO YRS 61 61 61 60 60 62 62 64 63 62 62 62 52