DULUTH HARBOR STN, MINNESOTA

Monthly Total Growing Degree Days

(212246)

Base Temperature = 40 F

File last updated on Apr 6, 2013
*** Note *** Provisional Data *** After Year/Month 200409
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
1933 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
1934 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
1935 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
1936 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
1937 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
1938 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
1939 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
1940 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
1941 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
1942 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
1943 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
1944 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
1945 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
1946 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
1947 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
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 0.00 z 0.00 z 0.00 z 0.00
1949 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
1950 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
1951 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
1952 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
1953 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
1954 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
1955 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
1956 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
1957 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
1958 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
1959 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
1960 0.00 z 0.00 z 1.00 57.00 202.00 512.50 814.00 820.50 523.50 292.50 6.00 0.00 3229.00
1961 0.00 3.00 0.00 25.50 247.00 627.50 809.50 911.50 521.00 277.00 13.50 0.00 3435.50
1962 0.00 0.00 0.00 58.50 217.50 428.50 705.00 763.50 521.50 310.00 20.00 14.50 3039.00
1963 0.00 0.00 13.00 42.50 223.00 539.48 a 863.00 816.85 a 609.50 532.50 58.00 0.00 3697.83
1964 0.00 0.00 1.50 55.00 423.50 492.50 838.50 676.00 464.50 237.50 63.00 0.00 3252.00
1965 0.00 0.00 0.00 54.50 222.50 463.00 702.00 723.50 372.50 228.50 29.50 0.00 2796.00
1966 0.00 0.00 1.50 15.50 256.00 561.50 889.50 735.00 590.00 206.00 5.00 0.00 3260.00
1967 0.00 a 0.00 11.50 32.50 209.50 465.00 774.50 750.00 561.50 211.00 16.00 0.00 3031.50
1968 0.00 0.00 23.50 103.00 192.50 467.50 749.50 659.50 557.50 288.00 13.50 0.00 3054.50
1969 0.00 0.00 0.00 46.00 324.00 402.00 675.00 937.50 651.50 169.00 28.50 0.00 3233.50
1970 0.00 0.00 0.00 39.50 153.50 496.50 857.50 851.00 552.50 192.00 13.00 0.00 3155.50
1971 0.00 0.00 0.00 62.50 184.50 502.50 733.50 750.50 566.00 330.00 3.50 0.00 3133.00
1972 0.00 0.00 0.00 11.50 137.50 420.50 663.50 685.50 448.00 151.00 5.50 0.00 2523.00
1973 1.50 0.00 0.00 50.00 207.00 470.50 817.76 b 819.00 541.00 327.00 8.00 0.00 3241.76
1974 0.00 0.00 0.00 23.00 125.00 553.00 803.00 725.50 370.50 197.50 23.00 0.00 2820.50
1975 0.00 0.00 0.00 9.00 317.00 482.00 903.00 764.50 426.00 296.50 113.00 0.00 3311.00
1976 0.00 2.00 0.00 78.00 302.00 585.50 862.00 841.50 458.50 133.30 a 4.50 0.00 3267.30
1977 0.00 0.00 0.50 104.48 a 326.53 a 538.97 a 808.67 b 645.83 a 458.04 b 278.00 58.39 b 0.00 3219.42
1978 0.00 c 0.00 3.50 21.72 a 301.00 569.50 771.50 771.50 548.79 a 260.50 52.50 0.00 3300.52
1979 0.00 a 0.00 0.00 30.00 147.50 513.50 753.00 693.50 568.00 159.00 7.00 0.00 2871.50
1980 0.00 0.00 0.00 129.50 497.00 0.00 z 999.50 863.00 558.00 205.00 46.00 0.00 3298.00
1981 0.00 11.00 6.50 84.00 241.00 513.50 831.50 853.00 561.50 213.50 85.50 0.00 3401.00
1982 0.00 a 0.00 0.50 93.50 259.00 497.00 790.50 706.50 391.00 248.00 16.50 2.50 3005.00
1983 0.00 0.00 0.00 65.50 179.00 466.50 888.50 996.00 532.00 204.00 31.50 0.00 3363.00
1984 0.00 0.00 0.00 47.50 277.50 513.50 843.50 865.00 461.00 224.00 9.50 0.00 3241.50
1985 0.00 0.00 0.00 71.00 322.50 455.50 813.50 662.00 454.00 254.00 10.00 0.00 3042.50
1986 0.00 0.00 32.00 95.50 297.50 559.00 777.50 763.50 452.50 213.50 3.50 0.00 3194.50
1987 0.00 0.00 16.00 186.00 307.00 708.10 a 893.50 853.50 638.50 144.00 56.79 b 0.00 3803.39
1988 0.00 0.00 e 0.00 72.00 214.50 n 0.00 z 0.00 z 824.00 509.00 141.50 1.00 0.00 m 1547.50
1989 0.00 0.00 0.00 16.50 256.50 446.38 a 851.00 829.00 558.50 163.50 0.00 0.00 3121.38
1990 0.00 0.00 5.50 77.00 188.50 0.00 z 0.00 z 852.50 615.00 202.50 48.50 3.00 1992.50
1991 0.00 b 2.00 4.13 a 64.00 265.05 a 519.00 430.00 n 699.50 i 509.00 155.00 0.00 0.00 1518.18
1992 0.00 a 0.00 0.00 32.50 394.50 484.00 665.00 732.00 455.50 221.00 0.00 0.00 2984.50
1993 0.00 0.00 0.00 16.00 320.50 456.00 749.50 0.00 z 373.00 0.00 z 0.00 0.00 1915.00
1994 0.00 0.00 1.50 103.00 0.00 z 603.00 353.50 r 731.50 569.00 293.50 49.00 0.00 2350.50
1995 0.00 0.00 2.50 18.00 289.33 a 591.00 846.50 811.00 0.00 z 179.00 0.00 0.00 2737.33
1996 0.00 0.00 0.00 19.00 134.85 a 443.00 684.58 a 822.50 540.50 198.00 0.00 0.00 2842.43
1997 0.00 0.00 1.50 28.50 116.00 526.00 f 722.50 757.00 632.00 192.00 2.50 0.00 2452.00
1998 0.00 0.00 z 11.50 n 139.50 338.93 a 541.00 917.50 937.00 685.50 272.50 20.00 6.50 3858.43
1999 0.00 0.00 17.00 59.00 321.00 634.66 a 901.50 775.50 549.50 144.00 56.50 0.00 3458.66
2000 0.00 0.50 34.50 53.00 369.50 0.00 z 0.00 z 892.28 a 528.50 272.50 42.00 0.00 2192.78
2001 0.00 0.00 0.00 97.50 386.50 558.00 0.00 z 880.00 528.50 175.15 a 130.00 0.00 2755.65
2002 0.00 0.00 0.00 31.50 178.50 543.00 874.50 644.80 a 475.00 104.50 6.00 0.00 2857.80
2003 1.00 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 11.50 0.00 12.50
2004 0.00 0.00 2.00 81.50 148.00 480.52 a 664.00 502.00 457.00 0.00 z 0.00 z 0.00 z 2335.02
Period of Record Statistics
MEAN 0.06 0.44 4.18 59.11 257.31 515.50 802.86 783.23 519.64 226.13 26.54 0.62 3159.97
S.D. 0.27 1.78 8.43 38.02 87.63 64.53 81.90 95.86 75.84 74.81 30.58 2.45 264.93
SKEW 4.65 5.23 2.40 1.06 0.44 0.73 -0.03 -0.31 -0.13 1.59 1.58 4.76 0.10
MAX 1.50 11.00 34.50 186.00 497.00 708.10 999.50 996.00 685.50 532.50 130.00 14.50 3803.39
MIN 0.00 0.00 0.00 9.00 116.00 402.00 663.50 502.00 370.50 104.50 0.00 0.00 2523.00
NO YRS 44 42 43 44 42 39 38 42 43 42 44 43 31