DULUTH INTL AP, MINNESOTA

Monthly Total Growing Degree Days

(212248)

Base Temperature = 40 F

File last updated on Apr 6, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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 z 0.00 z 0.00 z 0.00 z 188.00 29.50 0.00 217.50
1949 0.00 0.00 a 0.00 154.50 333.50 694.00 830.50 819.00 386.00 221.00 19.50 0.00 3458.00
1950 0.00 0.00 0.00 13.50 247.00 551.50 682.50 567.50 444.00 199.50 0.50 0.00 2706.00
1951 0.00 0.00 0.00 50.50 408.50 527.50 769.00 592.00 335.00 150.50 1.50 1.00 2835.50
1952 0.00 0.00 0.00 253.50 349.50 627.50 822.50 693.50 483.00 84.50 5.50 0.00 3319.50
1953 0.00 0.00 1.50 26.00 325.00 593.50 778.00 837.00 446.50 349.78 a 54.50 0.00 3411.78
1954 0.00 0.00 0.00 50.00 195.50 643.00 790.00 719.50 401.00 122.00 22.00 0.00 2943.00
1955 0.00 0.00 6.50 202.00 407.50 661.50 910.00 859.00 438.50 200.00 0.00 0.00 3685.00
1956 0.00 0.00 0.00 1.50 267.00 655.50 671.50 689.00 320.00 297.50 46.50 0.00 2948.50
1957 0.00 0.00 0.00 160.50 304.00 519.50 824.00 749.00 377.50 150.50 8.50 0.00 3093.50
1958 0.00 1.00 0.00 103.50 328.00 458.50 716.00 732.00 467.50 175.50 25.00 0.00 3007.00
1959 0.00 0.00 0.50 56.00 333.50 626.00 838.00 787.50 449.50 80.50 0.00 0.00 3171.50
1960 0.00 0.00 0.00 89.50 327.00 550.50 802.50 768.50 466.00 219.00 5.50 0.00 3228.50
1961 0.00 0.00 6.00 25.00 311.50 638.00 778.00 854.50 441.00 209.00 8.00 0.00 3271.00
1962 0.00 0.00 0.00 49.50 329.50 502.00 643.00 676.50 355.00 219.00 15.50 10.00 2800.00
1963 0.00 0.00 25.50 99.00 305.50 639.50 833.00 709.00 535.50 496.00 37.50 0.00 3680.50
1964 0.00 0.00 1.00 85.00 443.00 550.50 810.50 593.00 372.50 191.00 58.50 0.00 3105.00
1965 0.00 0.00 0.00 49.50 371.50 539.00 678.00 653.00 252.00 184.50 17.00 0.00 2744.50
1966 0.00 0.00 2.50 33.50 266.50 633.50 868.50 667.00 443.50 150.50 3.50 0.00 3069.00
1967 0.00 0.00 18.50 47.50 215.00 545.00 747.50 671.00 484.00 138.00 3.50 0.00 2870.00
1968 0.00 0.00 46.50 114.00 263.50 520.00 748.00 672.00 495.50 213.00 4.00 0.00 3076.50
1969 0.00 0.00 0.00 87.00 329.00 413.00 743.50 884.00 499.50 121.00 21.50 0.00 3098.50
1970 0.00 0.00 0.00 96.00 226.00 623.50 893.50 803.50 465.00 166.50 3.50 0.00 3277.50
1971 0.00 0.00 0.00 85.50 256.00 649.50 680.50 694.50 517.50 260.50 0.00 0.00 3144.00
1972 0.00 0.00 0.00 46.00 423.50 550.50 656.50 679.50 306.50 105.50 5.00 0.00 2773.00
1973 0.00 0.00 0.50 63.00 250.00 572.50 767.50 788.50 408.50 281.50 0.00 0.00 3132.00
1974 0.00 0.00 0.00 75.50 220.00 557.00 839.00 621.00 257.00 144.50 10.50 0.00 2724.50
1975 0.00 0.00 0.00 2.00 413.50 535.00 889.50 679.50 329.50 231.50 74.00 0.00 3154.50
1976 0.00 3.00 2.00 130.00 336.00 695.50 807.50 772.00 457.50 95.00 0.00 0.00 3298.50
1977 0.00 0.00 14.50 210.50 538.00 598.50 801.50 577.00 394.50 148.50 39.00 0.00 3322.00
1978 0.00 0.00 12.50 51.00 463.00 603.50 765.00 731.50 517.50 185.50 46.50 0.00 3376.00
1979 0.00 0.00 0.00 41.00 240.00 594.00 810.00 682.50 505.00 130.50 5.00 0.00 3008.00
1980 0.00 0.00 0.00 141.00 464.50 585.00 854.00 731.00 388.00 88.50 16.50 0.00 3268.50
1981 0.00 7.00 7.00 67.50 325.50 561.00 790.00 752.50 388.50 128.50 55.50 0.00 3083.00
1982 0.00 0.00 0.00 96.50 396.00 442.50 760.00 643.50 429.50 182.00 3.00 4.50 2957.50
1983 0.00 0.00 0.00 44.00 219.00 597.50 916.00 919.50 496.50 155.00 24.00 0.00 3371.50
1984 0.00 0.00 0.00 109.00 333.00 640.00 825.50 859.00 362.50 234.50 10.00 0.00 3373.50
1985 0.00 0.00 4.00 145.50 461.00 495.00 763.00 609.50 370.50 126.50 1.00 0.00 2976.00
1986 0.00 0.00 36.50 110.50 369.00 565.00 765.50 643.00 380.00 140.00 0.00 0.00 3009.50
1987 0.00 0.00 40.50 231.50 407.00 693.00 855.00 726.00 516.50 65.00 29.00 0.00 3563.50
1988 0.00 0.00 0.00 76.00 497.50 683.00 928.00 760.00 460.00 98.00 0.00 0.00 3502.50
1989 0.00 0.00 5.00 46.50 380.50 552.00 885.00 768.00 475.00 196.50 0.00 0.00 3308.50
1990 0.00 0.00 11.00 176.00 263.00 643.50 760.50 745.00 486.50 122.50 38.00 0.50 3246.50
1991 0.00 2.50 5.00 162.00 480.50 649.00 737.50 815.00 390.50 93.00 3.50 0.00 3338.50
1992 0.00 0.00 0.00 36.00 429.50 489.50 602.00 636.00 413.50 159.50 0.00 0.00 2766.00
1993 0.00 0.00 4.00 39.50 320.50 512.00 731.00 774.00 288.00 95.00 0.00 0.00 2764.00
1994 0.00 0.00 1.50 93.50 431.00 672.50 759.50 695.50 553.00 238.50 29.50 0.00 3474.50
1995 0.00 0.00 23.50 21.00 383.00 752.50 828.50 848.00 456.00 164.50 0.00 0.00 3477.00
1996 0.00 0.00 4.00 23.00 260.00 612.00 685.50 788.00 484.50 166.00 0.00 0.00 3023.00
1997 0.00 0.00 0.00 39.50 198.00 664.50 738.50 650.00 523.50 210.00 0.00 0.00 3024.00
1998 0.00 1.00 14.50 156.50 493.00 562.50 797.50 840.00 579.00 190.00 7.50 4.00 3645.50
1999 0.00 0.00 12.00 94.50 420.50 619.50 856.50 727.00 434.50 117.50 38.79 a 0.00 3320.79
2000 0.00 a 5.00 39.50 86.00 398.50 479.50 761.00 765.50 418.00 240.00 27.50 0.00 3220.50
2001 0.00 0.00 0.00 102.50 396.50 627.00 797.00 837.00 460.50 148.00 99.00 0.00 3467.50
2002 0.00 0.00 0.00 84.00 230.00 653.50 900.50 732.00 540.00 48.50 0.52 a 0.00 3189.02
2003 0.00 0.00 15.00 103.50 330.50 592.50 813.00 855.00 487.50 201.00 4.00 0.00 3402.00
2004 0.00 0.00 2.50 65.00 215.00 517.50 724.50 583.00 574.00 188.50 18.00 0.00 2888.00
2005 0.00 0.00 12.00 136.50 298.00 652.00 854.50 766.00 590.50 198.50 20.00 0.00 3528.00
2006 0.00 0.00 4.00 196.00 408.50 686.00 990.00 804.50 430.00 116.00 27.00 0.00 3662.00
2007 0.00 0.00 44.50 151.50 435.50 691.50 849.50 778.50 522.00 248.50 14.50 0.00 3736.00
2008 0.00 0.00 0.00 60.50 265.50 600.50 757.00 756.50 484.50 0.00 z 54.00 0.00 a 2978.50
2009 0.00 0.00 7.50 75.50 315.00 563.00 685.50 688.50 661.50 56.00 50.00 0.00 3102.50
2010 0.00 0.00 65.50 198.00 432.50 594.00 899.00 872.50 360.50 249.50 35.00 0.00 3706.50
2011 0.00 0.00 0.50 73.00 310.50 541.50 925.00 829.50 487.00 272.50 18.50 0.00 3458.00
2012 0.00 0.00 152.50 113.50 464.50 726.50 987.50 810.50 486.00 132.00 15.00 1.00 3889.00
2013 0.00 0.00 4.43 c 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 4.43
Period of Record Statistics
MEAN 0.00 0.30 10.07 92.29 344.68 593.52 796.53 738.01 444.21 174.68 18.62 0.32 3213.90
S.D. 0.00 1.16 22.61 57.95 86.04 71.27 81.49 85.13 80.40 73.99 21.12 1.43 286.74
SKEW 0.00 4.43 4.35 0.78 0.12 -0.20 0.08 -0.08 -0.14 1.36 1.44 5.48 0.15
MAX 0.00 7.00 152.50 253.50 538.00 752.50 990.00 919.50 661.50 496.00 99.00 10.00 3889.00
MIN 0.00 0.00 0.00 1.50 195.50 413.00 602.00 567.50 252.00 48.50 0.00 0.00 2706.00
NO YRS 65 65 65 64 64 64 64 64 64 64 65 65 63