CHICAGO MIDWAY AP 3 SW, ILLINOIS

Monthly Total Growing Degree Days

(111577)

Base Temperature = 50 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
1928 0.00 z 0.00 z 29.00 53.50 270.00 389.00 43.00 z 0.00 z 0.00 z 170.00 f 17.50 0.00 a 759.00
1929 0.00 0.00 28.86 b 127.50 255.00 432.86 b 38.50 z 0.00 z 0.00 z 76.00 f 0.00 0.00 844.22
1930 0.00 20.50 6.72 a 107.00 346.00 567.50 51.50 z 0.00 z 0.00 z 149.50 f 48.00 0.00 1095.72
1931 0.00 0.00 0.00 118.97 a 193.50 671.90 a 55.50 z 0.00 z 0.00 z 243.00 100.50 0.00 a 1327.86
1932 0.00 0.00 0.00 57.50 317.00 633.50 71.00 z 0.00 z 0.00 z 161.89 d 1.50 0.50 1171.89
1933 0.00 0.00 8.00 67.50 357.50 791.00 30.00 z 0.00 z 0.00 z 85.00 g 27.00 1.03 a 1252.03
1934 0.00 a 0.00 0.00 69.31 a 467.00 709.50 54.50 z 0.00 z 0.00 z 216.43 d 48.50 0.00 1510.74
1935 0.00 0.00 27.00 69.50 155.00 470.00 30.00 z 0.00 z 0.00 z 156.00 g 5.00 0.00 726.50
1936 0.00 0.00 18.00 94.00 476.00 484.00 20.50 z 0.00 z 0.00 z 178.85 e 22.50 1.50 1274.85
1937 0.00 0.00 0.00 77.50 296.00 524.00 18.00 z 0.00 z 0.00 z 135.76 b 12.50 0.00 a 1045.76
1938 0.00 0.00 74.40 a 162.50 305.50 546.00 22.00 z 0.00 z 0.00 z 271.25 e 73.50 0.00 1433.15
1939 0.00 a 0.00 41.50 87.00 415.50 677.50 22.00 z 0.00 z 0.00 z 234.10 b 7.00 0.00 1462.60
1940 0.00 0.00 a 12.50 48.50 220.50 584.00 53.00 z 0.00 z 0.00 z 225.86 c 14.50 0.00 1105.86
1941 0.00 0.00 0.00 190.50 434.00 618.00 77.50 z 0.00 z 0.00 z 213.79 b 32.07 a 0.50 1488.86
1942 0.00 a 0.00 12.50 206.00 319.82 a 601.00 104.00 y 0.00 z 0.00 z 197.88 a 30.50 0.00 1367.70
1943 0.00 0.00 a 25.50 41.50 232.00 667.50 53.00 z 0.00 z 0.00 z 181.02 c 1.50 0.00 1149.02
1944 7.50 0.00 0.00 31.50 468.00 686.00 16.50 z 0.00 z 0.00 z 147.52 b 58.00 0.00 1398.52
1945 0.00 0.00 129.00 107.00 191.00 477.00 67.00 z 0.00 z 0.00 z 78.00 g 41.50 0.00 945.50
1946 0.00 0.00 55.28 a 139.82 b 235.50 552.50 72.50 z 0.00 z 0.00 z 285.95 b 15.00 19.12 a 1303.17
1947 0.00 0.00 0.00 49.50 166.50 480.00 71.50 z 0.00 z 0.00 z 393.91 b 8.00 0.00 1097.91
1948 0.00 0.00 22.00 169.00 176.00 529.00 776.03 a 731.50 533.50 98.50 32.00 0.00 a 3067.53
1949 0.00 0.00 22.00 74.00 358.50 719.00 863.50 766.50 313.50 273.00 42.50 3.50 3436.00
1950 2.50 0.00 4.13 a 21.21 a 334.00 572.00 688.50 619.00 448.50 290.50 18.50 0.00 2998.84
1951 0.00 0.00 11.00 70.00 388.02 a 506.50 699.00 618.00 391.03 a 210.00 5.50 12.50 2911.55
1952 0.00 0.00 8.50 164.00 274.00 728.00 848.50 704.50 465.50 86.50 46.00 0.00 3325.50
1953 0.00 a 0.00 18.00 62.59 a 353.00 709.66 a 804.40 b 803.33 b 500.36 b 308.50 68.50 0.00 a 3628.32
1954 0.00 7.00 4.13 a 189.00 263.00 768.50 819.50 721.00 568.39 b 229.50 29.00 0.00 a 3599.03
1955 0.00 0.00 a 12.92 a 227.50 419.53 a 571.50 966.17 a 889.50 535.00 206.50 16.00 0.00 3844.62
1956 0.00 0.00 0.00 83.50 334.50 740.69 a 710.50 746.00 448.45 a 339.50 57.50 4.98 c 3465.62
1957 0.00 7.00 11.88 a 159.31 a 292.00 638.79 a 818.00 726.00 424.00 118.50 8.50 0.00 3203.99
1958 0.00 0.00 0.00 116.00 373.50 440.00 727.50 737.50 485.00 241.00 53.50 0.00 3174.00
1959 0.00 0.00 15.00 97.00 507.88 a 684.50 769.00 888.00 570.00 145.50 6.50 4.50 3687.88
1960 0.00 0.00 9.00 201.00 317.50 545.50 733.50 795.00 616.50 219.00 30.00 3.50 3470.50
1961 0.00 0.00 15.00 37.50 237.00 589.00 741.50 757.00 577.00 228.50 23.00 0.00 3205.50
1962 0.00 0.00 13.50 146.50 532.50 627.00 685.50 765.50 426.50 299.00 1.00 0.50 3497.50
1963 0.00 0.00 52.50 154.00 278.00 700.50 774.00 699.00 527.50 449.00 39.00 0.00 3673.50
1964 0.00 0.00 0.00 127.00 495.00 693.00 797.00 671.50 476.50 123.50 99.50 0.00 3483.00
1965 0.00 0.00 1.50 52.00 437.50 567.00 704.50 628.00 452.50 171.00 31.50 3.50 3049.00
1966 0.00 1.00 18.00 65.00 237.50 645.00 876.50 671.00 450.00 143.00 52.00 1.50 3160.50
1967 7.00 0.00 45.50 136.00 191.00 641.00 637.50 595.00 450.50 187.50 6.00 0.00 2897.00
1968 0.00 0.00 65.00 146.00 263.50 668.00 751.50 765.00 500.50 222.00 13.50 1.50 3396.50
1969 0.00 0.00 10.00 105.00 356.00 467.00 772.50 785.00 492.00 200.50 0.00 0.00 3188.00
1970 0.00 0.00 0.00 168.50 426.50 634.50 803.50 780.00 484.50 204.00 3.50 13.00 3518.00
1971 0.00 0.00 15.00 87.00 252.50 773.50 701.00 694.50 611.00 382.50 66.00 2.00 3585.00
1972 0.00 1.50 9.00 67.50 378.50 483.00 756.00 724.00 446.50 115.00 2.50 0.00 2983.50
1973 1.50 0.00 30.00 102.50 197.50 683.00 815.00 825.50 510.00 288.00 11.00 2.00 3466.00
1974 0.00 0.00 25.00 162.50 237.50 497.00 785.50 680.50 354.50 175.50 31.00 0.00 2949.00
1975 1.00 0.00 8.50 51.50 403.00 661.50 808.00 816.50 340.50 225.00 138.50 14.50 3468.50
1976 0.00 16.50 59.50 181.00 236.50 649.50 769.00 665.50 435.00 114.00 1.50 0.00 3128.00
1977 0.00 0.00 78.00 223.50 614.00 590.50 882.00 677.00 473.50 85.00 80.00 2.00 3705.50
1978 0.00 0.00 14.50 44.00 325.50 568.50 702.00 724.50 605.50 110.00 57.50 0.00 3152.00
1979 0.00 0.00 18.50 65.00 305.50 580.00 708.00 670.50 473.50 180.50 18.50 2.00 3022.00
1980 0.00 0.00 b 0.00 i 0.00 z 261.50 j 523.50 809.88 c 750.72 a 460.50 92.50 0.00 z 6.00 2643.09
1981 0.00 1.00 30.50 135.00 221.50 618.50 690.00 685.00 420.50 105.00 39.00 0.00 2946.00
1982 0.00 0.00 8.00 68.00 522.00 432.00 774.50 635.00 433.50 225.50 34.50 35.50 3168.50
1983 0.00 1.50 57.00 49.00 193.00 650.00 884.50 860.50 501.50 175.50 40.00 0.00 3412.50
1984 0.00 3.50 0.00 54.00 252.00 688.00 718.00 800.00 425.50 242.50 19.50 9.50 3212.50
1985 0.00 0.00 16.00 232.50 416.50 532.00 766.00 664.00 524.00 181.00 12.00 0.00 3344.00
1986 0.00 0.00 83.50 193.50 343.50 568.50 841.00 627.50 553.00 168.50 8.50 0.00 3387.50
1987 0.00 0.00 30.00 138.50 477.50 734.50 862.00 729.50 482.00 60.50 56.50 0.00 3571.00
1988 0.00 0.00 26.50 82.00 438.00 727.00 901.50 892.00 545.00 99.50 16.50 0.00 3728.00
1989 3.50 0.00 39.00 88.50 341.00 593.00 820.50 737.00 427.50 248.50 19.50 0.00 3318.00
1990 0.00 0.00 82.00 188.50 272.50 672.00 750.00 743.00 560.50 192.50 88.50 0.00 3549.50
1991 0.00 0.00 51.50 189.00 586.00 748.00 874.50 805.50 491.50 200.50 19.00 2.00 3967.50
1992 0.00 0.00 18.50 65.00 339.50 549.50 671.00 621.00 470.00 167.00 4.50 0.00 2906.00
1993 0.00 0.00 5.50 70.00 390.50 573.50 817.00 792.00 346.00 147.00 8.00 0.00 3149.50
1994 0.00 6.00 20.50 167.00 314.50 653.00 746.50 627.50 528.50 206.50 47.00 1.50 3318.50
1995 0.00 0.00 51.00 34.50 293.50 697.50 925.50 970.00 497.00 228.00 7.50 0.00 3704.50
1996 0.00 0.00 6.00 92.50 260.50 630.50 686.50 758.50 468.00 175.50 6.50 0.00 3084.50
1997 2.00 0.00 26.00 63.00 175.50 609.00 780.50 656.00 490.00 238.50 0.00 0.00 3040.50
1998 0.00 4.50 87.50 102.50 510.50 624.50 812.00 795.00 612.50 217.00 35.00 44.00 3845.00
1999 0.00 0.50 23.00 109.00 459.50 702.50 970.00 707.50 497.00 193.50 80.00 5.50 3748.00
2000 0.00 32.50 68.00 69.50 438.00 593.50 724.88 a 777.50 522.50 286.50 29.50 0.00 3542.38
2001 0.00 0.00 0.00 202.00 387.50 602.50 836.00 776.00 434.00 186.00 86.50 16.00 3526.50
2002 0.00 0.00 5.50 170.00 236.00 690.00 916.00 801.50 643.50 139.00 21.50 0.00 3623.00
2003 0.00 z 0.00 41.00 114.00 241.00 516.00 734.00 805.50 450.00 171.50 30.50 0.00 3103.50
2004 1.00 0.00 41.50 146.50 386.50 591.50 721.00 601.50 576.00 190.00 28.00 0.00 3283.50
2005 0.00 0.00 20.50 148.00 288.00 784.00 855.00 812.00 651.00 237.50 52.50 0.00 3848.50
2006 0.00 0.00 19.00 189.00 351.00 583.50 870.50 773.50 421.50 143.50 52.00 4.00 3407.50
2007 0.00 0.00 85.25 a 105.00 465.00 679.00 752.00 790.00 585.00 326.50 10.00 0.00 3797.75
2008 10.50 0.00 0.50 122.50 209.50 659.50 781.50 727.00 525.00 164.50 58.50 0.00 3259.00
2009 0.00 6.00 30.00 87.00 348.50 567.50 650.00 665.00 482.50 71.00 35.00 0.00 2942.50
2010 0.00 0.00 28.00 213.00 400.50 654.00 887.00 843.00 481.50 229.00 39.00 1.00 3776.00
2011 0.00 0.00 8.00 60.00 321.00 623.50 940.50 760.50 405.50 210.50 31.00 0.00 3360.50
2012 0.50 0.00 250.50 86.00 488.50 734.00 1009.00 781.00 471.50 101.00 k 0.00 z 0.00 z 3821.00
Period of Record Statistics
MEAN 0.45 1.30 27.92 113.06 336.74 614.59 791.90 740.19 488.78 201.00 32.17 2.61 3372.74
S.D. 1.66 4.68 35.77 55.07 105.36 90.03 82.65 78.70 71.59 73.99 27.63 7.00 284.19
SKEW 4.52 4.91 3.38 0.42 0.40 -0.26 0.46 0.27 0.08 0.71 1.24 4.12 0.06
MAX 10.50 32.50 250.50 232.50 614.00 791.00 1009.00 970.00 651.00 449.00 138.50 44.00 3967.50
MIN 0.00 0.00 0.00 21.21 155.00 389.00 637.50 595.00 313.50 60.50 0.00 0.00 2897.00
NO YRS 83 84 84 84 84 85 65 65 65 78 83 84 62