date! ,

Monthly Total Growing Degree Days

(a vali)

Base Temperature = 40 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
1889 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 z 0.00
1890 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 z 0.00
1891 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 z 0.00
1892 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 z 0.00
1893 0.00 0.00 2.00 12.00 280.50 841.50 937.50 778.50 499.66 a 228.22 b 60.50 0.00 a 3640.38
1894 0.00 b 0.00 a 42.00 205.00 399.00 851.50 936.00 820.50 588.50 216.00 1.00 0.50 4060.00
1895 0.00 3.00 5.50 215.50 513.50 813.50 817.00 844.75 a 668.50 106.50 40.50 0.00 4028.25
1896 0.00 2.00 0.50 265.50 663.50 804.50 892.00 838.00 420.50 156.03 a 3.00 0.00 4045.53
1897 0.50 0.00 14.00 114.50 356.50 617.00 965.00 725.00 667.00 315.00 23.50 0.00 3798.00
1898 0.00 0.00 a 19.50 110.00 423.50 808.50 948.00 819.43 a 623.00 164.82 a 23.50 0.00 3940.25
1899 0.00 0.00 0.00 234.50 452.00 771.00 909.33 a 942.50 406.00 276.50 41.50 0.00 4033.33
1900 0.00 0.00 0.00 225.00 b 439.00 750.00 837.00 1082.50 569.50 435.00 13.33 c 0.00 a 4351.33
1901 0.00 0.00 0.00 199.00 475.00 777.00 1015.00 846.00 561.72 a 320.50 17.50 0.00 4211.72
1902 0.00 b 0.50 61.50 168.00 574.50 668.50 998.50 857.50 536.00 214.00 38.50 0.00 4117.50
1903 0.00 0.00 42.50 162.00 557.50 681.50 894.50 749.00 510.50 246.50 57.50 0.00 3901.50
1904 0.00 0.00 0.00 88.50 464.00 758.00 805.00 748.00 583.00 230.50 69.00 0.00 3746.00
1905 0.00 0.00 43.00 146.00 459.26 d 733.50 883.50 950.50 683.50 244.00 15.00 0.00 4158.26
1906 0.00 1.56 a 0.00 232.50 447.00 773.00 881.50 915.00 770.50 248.00 51.00 0.00 4320.06
1907 0.00 a 0.00 30.50 50.69 a 261.50 764.00 886.50 444.00 m 565.00 181.87 a 8.00 0.00 2748.06
1908 0.00 0.00 8.00 188.79 a 453.50 704.48 a 920.38 b 810.50 793.00 306.50 41.50 0.00 4226.66
1909 1.03 a 0.00 a 0.00 b 24.83 a 469.50 840.00 917.00 798.50 f 535.86 a 169.39 c 88.45 a 1.50 3047.56
1910 0.00 0.00 185.50 264.00 329.50 786.00 911.50 819.50 463.00 319.50 0.00 0.00 a 4078.50
1911 0.00 0.00 40.00 167.50 633.00 870.00 837.00 744.00 494.00 166.50 0.00 0.00 3952.00
1912 0.00 0.00 0.50 170.00 479.50 663.50 875.50 683.00 558.50 244.50 21.00 0.00 3696.00
1913 0.00 0.00 10.00 234.31 a 396.50 825.50 838.50 852.00 561.50 246.00 43.00 2.00 4009.31
1914 0.00 0.00 4.00 150.00 528.00 681.00 939.50 761.00 528.00 400.00 33.00 0.00 4024.50
1915 0.00 0.00 0.00 369.50 311.50 569.00 739.00 639.00 525.00 240.50 38.50 0.00 3432.00
1916 0.00 0.00 8.50 119.50 388.50 572.50 1079.00 867.50 490.00 206.50 21.50 0.50 3754.00
1917 0.00 0.00 2.50 79.50 308.00 576.00 873.50 683.00 460.00 47.50 46.00 0.00 3076.00
1918 0.00 0.00 56.50 76.00 545.50 669.83 a 833.00 838.00 340.50 255.50 60.50 0.00 3675.33
1919 0.00 0.00 16.50 127.00 424.50 845.50 910.37 a 752.50 581.50 195.00 5.50 0.00 3858.37
1920 0.00 0.00 55.91 c 86.00 466.00 769.50 801.00 781.50 635.50 444.00 0.50 1.00 4040.91
1921 0.00 0.00 30.00 275.00 566.50 874.00 1066.50 844.00 658.00 267.50 2.50 0.00 4584.00
1922 0.00 0.00 4.00 110.00 647.00 774.00 809.50 851.50 639.00 307.00 68.50 0.00 4210.50
1923 0.00 0.00 0.50 168.50 487.00 872.00 969.50 739.00 570.00 208.50 24.50 0.50 4040.00
1924 0.00 0.00 0.00 95.50 232.50 e 626.50 776.50 723.00 395.50 390.50 34.00 0.00 3274.00
1925 0.00 0.00 38.00 287.50 338.00 745.00 820.00 855.50 624.00 70.00 2.50 0.00 3780.50
1926 0.00 0.00 0.00 131.50 556.00 598.50 865.50 804.00 483.00 195.50 0.00 0.00 3634.00
1927 0.00 a 0.00 39.50 140.50 393.50 654.50 808.50 675.50 620.00 260.50 4.50 0.00 3597.00
1928 0.00 0.00 b 46.00 77.50 511.00 579.50 898.50 868.52 a 440.00 276.50 22.50 0.00 3720.02
1929 0.00 0.00 a 8.27 a 128.65 d 373.50 703.00 934.00 810.00 528.00 207.00 9.50 0.00 3701.92
1930 0.00 21.00 16.00 211.50 483.50 754.00 916.50 888.50 570.50 266.00 133.27 d 0.00 g 4260.77
1931 0.00 b 1.50 0.00 a 184.00 375.10 a 815.50 902.00 782.75 a 681.00 306.56 d 82.50 b 0.00 b 4130.91
1932 0.00 b 0.00 a 0.00 a 105.00 442.02 b 768.50 849.52 e 854.00 463.45 a 159.00 11.50 0.00 3652.98
1933 0.00 b 0.00 b 1.07 b 129.50 484.12 a 927.00 0.00 z 0.00 z 666.43 b 181.87 a 22.20 e 0.00 h 2412.18
1934 0.00 f 0.00 h 0.00 g 111.50 f 461.00 k 832.50 0.00 z 0.00 z 0.00 z 0.00 z 22.50 0.00 855.00
1935 0.00 0.00 a 13.90 b 0.00 z 314.65 a 568.50 1014.50 816.16 b 505.86 a 193.00 0.00 a 0.00 3426.56
1936 0.00 a 0.00 0.50 67.00 590.03 a 643.00 1049.72 b 904.00 633.00 172.00 5.50 3.00 4067.76
1937 0.00 0.00 0.00 68.04 b 471.41 b 654.00 917.08 a 970.30 a 544.00 146.22 a 5.00 0.00 3776.05
1938 0.00 0.00 70.50 206.90 a 432.45 a 646.50 834.00 861.00 467.50 282.50 89.00 0.00 3890.35
1939 0.00 0.00 43.00 129.50 583.00 688.00 895.50 823.00 585.00 229.00 15.50 2.50 3994.00
1940 0.00 0.00 0.00 80.17 a 370.00 673.39 b 894.50 756.50 590.00 254.50 18.50 0.00 3637.57
1941 0.00 0.00 a 2.50 288.10 a 609.84 b 751.00 889.50 813.50 590.50 242.50 41.50 4.50 4233.45
1942 0.00 0.00 0.00 271.00 353.83 b 659.00 796.50 761.50 428.04 b 275.50 6.50 0.00 3551.86
1943 0.00 0.00 8.00 91.50 378.00 765.50 913.43 b 833.50 397.00 203.00 3.00 0.00 3592.93
1944 4.00 0.00 0.00 76.00 557.50 758.50 806.50 653.50 f 514.00 168.50 70.50 0.00 2955.50
1945 0.00 a 0.00 113.00 118.50 286.50 542.00 762.50 775.50 516.50 138.50 16.00 0.00 3269.00
1946 0.00 0.00 102.50 193.00 357.00 652.50 843.50 741.50 469.00 268.50 5.00 4.50 3637.00
1947 0.00 0.00 6.00 66.00 299.50 613.00 858.50 1042.50 586.50 513.00 27.50 0.00 4012.50
1948 0.00 0.00 17.00 247.50 433.50 682.76 a 895.79 b 879.76 b 673.00 228.50 66.67 c 1.50 4125.98
1949 0.00 a 0.00 4.65 a 177.93 a 515.12 a 826.50 940.50 860.00 437.00 327.00 43.00 0.00 4131.70
1950 0.00 0.00 0.00 32.50 392.50 677.59 a 770.50 0.00 z 530.50 342.00 11.50 0.00 2757.09
1951 0.00 0.00 2.50 107.07 a 565.50 595.34 a 829.52 b 715.50 413.50 212.50 2.50 9.00 3452.93
1952 0.00 0.00 4.00 278.50 429.50 753.62 a 899.00 767.50 526.00 103.16 b 25.34 a 0.00 3786.62
1953 0.00 0.00 4.59 d 55.50 469.50 754.00 832.00 848.88 a 520.00 418.00 98.50 0.00 4000.98
1954 0.00 1.00 0.00 c 196.00 317.00 780.50 866.50 766.00 484.82 b 166.50 31.00 0.00 3609.32
1955 0.00 0.00 a 1.07 b 251.00 480.50 a 671.00 979.50 935.17 a 557.50 284.34 b 1.50 0.00 a 4161.58
1956 0.00 0.00 0.00 36.00 412.50 790.00 764.50 803.50 453.00 389.00 82.50 0.00 3731.00
1957 0.00 0.00 2.00 243.50 411.00 698.50 924.00 782.00 456.00 178.00 18.00 0.00 3713.00
1958 0.00 0.50 0.00 155.00 416.50 559.50 778.50 767.00 536.00 266.00 51.00 0.00 3530.00
1959 0.00 0.00 0.00 110.50 540.50 728.50 835.00 909.50 559.00 129.00 0.00 0.00 3812.00
1960 0.00 0.00 2.00 190.00 448.00 607.50 817.00 863.00 574.50 252.00 12.50 1.00 3767.50
1961 0.00 0.00 17.00 54.00 385.00 715.00 844.00 848.50 531.50 272.00 17.50 0.00 3684.50
1962 0.00 0.00 6.00 152.00 584.00 682.50 776.00 794.00 443.00 315.00 5.50 27.00 3785.00
1963 0.00 0.00 43.00 182.50 392.50 759.00 914.00 767.50 565.50 494.50 47.00 0.00 4165.50
1964 0.00 0.00 0.00 180.50 579.50 720.50 955.50 748.50 491.50 203.00 115.00 0.00 3994.00
1965 0.00 0.00 0.00 56.50 555.00 661.00 788.50 741.00 385.50 240.50 29.50 1.00 3458.50
1966 0.00 0.00 17.50 77.50 317.00 740.50 956.50 748.50 500.00 200.50 15.50 0.00 3573.50
1967 0.00 0.00 21.50 115.50 281.00 720.00 784.50 696.50 492.50 200.50 9.50 0.00 3321.50
1968 0.00 0.00 97.50 200.00 381.50 692.50 853.00 825.00 541.00 289.00 16.00 0.00 3895.50
1969 0.00 0.00 1.50 189.50 473.00 474.50 838.00 874.50 541.50 196.50 22.00 0.00 3611.00
1970 0.00 0.00 0.00 196.50 486.00 771.50 908.50 825.50 534.50 278.00 7.50 0.00 4008.00
1971 0.00 0.00 0.00 138.00 325.00 799.00 749.00 721.00 547.50 393.00 24.50 0.00 3697.00
1972 0.00 0.00 2.00 77.50 563.50 627.50 782.50 791.50 484.00 138.00 4.00 0.00 3470.50
1973 0.00 0.00 38.00 111.00 311.50 746.00 883.00 869.00 508.00 355.50 7.00 0.00 3829.00
1974 0.00 0.00 0.50 166.50 314.50 573.50 915.50 774.00 342.00 181.50 40.00 0.00 3308.00
1975 0.00 0.00 1.50 50.50 551.50 665.50 910.50 783.50 367.00 258.50 109.50 0.00 3698.00
1976 0.00 0.00 14.00 169.00 375.00 772.50 891.00 802.50 453.50 169.00 4.00 0.00 3650.50
1977 0.00 0.00 53.50 305.50 713.00 656.00 908.50 661.00 519.50 157.00 67.00 0.00 4041.00
1978 0.00 0.00 11.00 81.00 490.00 655.50 796.50 811.50 617.50 133.30 a 56.00 0.00 3652.30
1979 0.00 0.00 a 3.50 119.00 297.00 656.50 875.50 741.50 529.00 112.50 h 21.50 0.00 3243.50
1980 0.00 0.00 0.00 174.00 526.50 657.00 894.50 816.00 456.00 122.50 14.00 0.00 3660.50
1981 0.00 6.50 26.50 155.50 395.00 686.50 839.50 817.00 445.50 139.00 63.50 0.00 b 3574.50
1982 0.00 0.00 2.50 94.00 602.50 524.00 904.00 748.00 459.50 217.00 20.50 10.00 3582.00
1983 0.00 0.00 12.50 83.00 278.00 698.50 986.50 943.50 554.00 202.50 22.50 0.00 3781.00
1984 0.00 0.00 0.00 166.50 362.50 753.00 825.00 890.00 430.50 282.50 6.50 0.00 3716.50
1985 0.00 0.00 10.33 a 247.50 570.50 586.50 818.00 740.50 512.00 162.00 15.50 0.00 3662.83
1986 0.00 0.00 43.00 237.50 533.00 679.50 869.50 670.50 495.50 167.00 7.50 0.00 3703.00
1987 0.00 0.00 0.00 z 295.00 538.50 779.00 950.50 791.00 0.00 z 75.50 49.50 0.00 3479.00
1988 0.00 0.00 1.50 141.00 599.50 812.00 990.00 933.50 528.00 106.50 7.50 0.00 4119.50
1989 0.00 0.00 24.50 110.50 444.50 638.00 907.50 817.00 514.00 255.50 0.00 0.00 3711.50
1990 0.00 0.00 42.50 235.00 353.50 703.50 846.50 807.00 577.00 148.00 68.50 0.00 3781.50
1991 0.00 0.00 34.00 215.00 592.00 849.00 836.00 867.00 422.00 150.50 0.00 0.00 3965.50
1992 0.00 0.00 0.50 88.00 490.00 632.50 672.00 695.50 432.50 188.50 1.00 0.00 3200.50
1993 0.00 0.00 14.50 60.50 403.00 585.50 814.00 827.00 321.50 142.00 2.50 0.00 3170.50
1994 0.00 0.00 10.00 128.00 472.00 771.50 802.00 720.00 615.50 247.00 29.00 0.00 3795.00
1995 0.00 0.00 41.50 47.00 407.50 857.00 883.00 947.00 464.50 196.50 0.00 0.00 3844.00
1996 0.00 0.00 1.00 76.00 350.50 713.00 767.50 836.50 534.50 196.00 1.50 0.00 3476.50
1997 0.00 0.00 8.00 114.00 286.50 776.00 829.00 716.50 568.00 249.00 8.50 0.00 3555.50
1998 0.00 0.50 48.50 235.00 658.00 669.00 892.00 861.00 673.50 225.50 26.00 13.00 4302.00
1999 0.00 0.00 19.50 210.00 544.50 740.50 968.00 767.50 489.00 140.50 62.50 0.00 3942.00
2000 0.00 a 7.50 77.50 142.00 520.00 653.00 847.50 832.00 507.00 291.50 53.50 0.00 3931.50
2001 0.00 0.00 0.00 191.00 501.00 704.50 888.00 907.00 490.50 163.00 107.50 13.50 3966.00
2002 0.00 0.00 0.00 148.00 291.00 764.00 997.50 808.50 595.00 112.50 12.00 0.00 3728.50
2003 0.00 0.00 51.00 164.50 429.00 689.00 860.00 927.50 556.00 201.50 3.50 0.00 3882.00
2004 0.00 0.00 21.50 149.00 369.00 626.00 835.00 643.00 682.50 209.00 24.50 0.00 3559.50
2005 0.00 0.00 30.50 247.00 385.00 869.00 952.00 842.00 671.50 271.50 33.00 0.00 4301.50
2006 0.00 0.00 9.00 275.00 485.50 762.00 1022.00 847.00 450.00 134.50 35.00 0.00 4020.00
2007 0.00 0.00 84.50 208.00 572.00 793.50 897.00 843.50 584.50 339.00 8.50 0.00 4330.50
2008 0.00 0.00 0.00 135.00 355.00 674.50 859.00 792.50 587.50 184.00 69.00 0.00 3656.50
2009 0.00 0.00 10.00 124.50 446.40 a 668.00 689.50 728.50 633.00 78.50 44.50 0.00 3422.90
2010 0.00 0.00 53.50 296.00 505.50 693.00 921.50 906.50 427.50 244.50 34.00 0.00 4082.00
2011 0.00 a 0.00 1.55 a 59.50 420.00 693.50 971.50 816.00 473.00 271.00 14.50 0.00 3720.55
2012 0.00 b 0.00 249.50 144.50 566.50 751.03 a 1022.50 824.00 500.50 110.50 i 0.00 z 0.00 z 4058.53
Period of Record Statistics
MEAN 0.05 0.38 21.08 154.97 449.20 713.27 878.77 812.25 530.10 229.86 29.54 0.82 3816.29
S.D. 0.38 2.14 35.69 73.68 102.94 86.96 75.69 78.51 86.51 86.64 28.91 3.28 283.70
SKEW 9.73 8.11 3.51 0.34 0.12 -0.09 0.12 0.40 0.25 0.75 1.29 5.67 -0.07
MAX 4.00 21.00 249.50 369.50 713.00 927.00 1079.00 1082.50 793.00 513.00 133.27 27.00 4584.00
MIN 0.00 0.00 0.00 12.00 232.50 474.50 672.00 639.00 321.50 47.50 0.00 0.00 3076.00
NO YRS 119 119 118 118 119 120 118 114 118 117 119 117 109