DULUTH HARBOR STN, MINNESOTA

Monthly Total Growing Degree Days

(212246)

Base Temperature = 50 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 0.00 1.50 51.00 219.50 504.00 510.50 229.00 85.50 0.00 0.00 1601.00
1961 0.00 0.00 0.00 2.00 73.00 328.00 499.50 601.50 250.00 78.00 0.00 0.00 1832.00
1962 0.00 0.00 0.00 2.00 52.50 160.50 395.00 453.50 224.00 87.00 0.00 0.00 1374.50
1963 0.00 0.00 0.00 3.00 47.00 259.14 a 553.00 506.85 a 313.00 236.50 0.00 0.00 1918.49
1964 0.00 0.00 0.00 0.00 151.50 211.50 528.50 366.00 178.00 71.00 1.50 0.00 1508.00
1965 0.00 0.00 0.00 14.00 45.00 203.00 392.00 413.50 114.50 17.50 0.50 0.00 1200.00
1966 0.00 0.00 0.00 0.00 84.00 275.00 579.50 425.00 294.00 36.00 0.00 0.00 1693.50
1967 0.00 a 0.00 0.00 0.00 35.50 187.50 464.50 440.00 279.50 41.50 0.00 0.00 1448.50
1968 0.00 0.00 0.00 12.00 15.50 187.00 439.50 349.50 257.50 68.50 0.00 0.00 1329.50
1969 0.00 0.00 0.00 1.50 108.50 112.50 365.50 627.50 351.50 31.00 0.00 0.00 1598.00
1970 0.00 0.00 0.00 1.50 31.50 202.00 547.50 541.00 259.50 22.50 0.00 0.00 1605.50
1971 0.00 0.00 0.00 0.00 41.00 218.00 423.50 440.50 269.50 84.00 0.00 0.00 1476.50
1972 0.00 0.00 0.00 0.00 10.50 164.50 353.50 375.50 176.50 24.00 0.00 0.00 1104.50
1973 0.00 0.00 0.00 2.50 33.50 190.50 507.76 b 509.00 246.50 91.50 0.00 0.00 1581.26
1974 0.00 0.00 0.00 0.00 16.50 256.50 493.00 415.50 116.50 21.50 0.00 0.00 1319.50
1975 0.00 0.00 0.00 0.00 87.50 190.00 593.00 454.50 141.00 61.50 22.50 0.00 1550.00
1976 0.00 0.00 0.00 3.00 62.50 286.50 552.00 531.50 197.50 33.58 a 0.00 0.00 1666.58
1977 0.00 0.00 0.00 7.24 a 76.98 a 241.55 a 498.67 b 335.83 a 161.25 b 36.00 0.00 b 0.00 1357.53
1978 0.00 c 0.00 0.00 0.00 a 79.50 276.00 461.50 461.50 248.79 a 58.50 3.50 0.00 1589.29
1979 0.00 a 0.00 0.00 1.50 19.50 228.00 443.00 383.50 268.00 18.00 0.00 0.00 1361.50
1980 0.00 0.00 0.00 30.00 209.00 0.00 z 689.50 553.00 258.50 49.50 2.50 0.00 1792.00
1981 0.00 0.00 0.00 3.50 52.50 227.50 521.50 543.00 273.00 25.00 0.50 0.00 1646.50
1982 0.00 a 0.00 0.00 31.00 52.00 203.00 480.50 396.50 141.50 28.00 0.00 0.00 1332.50
1983 0.00 0.00 0.00 4.00 25.50 181.00 578.50 686.00 247.50 14.50 0.00 0.00 1737.00
1984 0.00 0.00 0.00 2.00 91.50 222.00 533.50 555.00 197.50 20.00 0.00 0.00 1621.50
1985 0.00 0.00 0.00 5.50 86.50 164.50 503.50 352.00 179.00 38.50 0.00 0.00 1329.50
1986 0.00 0.00 0.00 13.50 104.00 268.00 467.50 453.50 154.50 38.00 0.00 0.00 1499.00
1987 0.00 0.00 2.00 53.00 97.00 409.14 a 583.50 543.50 338.50 10.50 0.00 b 0.00 2037.14
1988 0.00 0.00 e 0.00 0.00 79.00 n 0.00 z 0.00 z 514.00 210.00 21.00 0.00 0.00 m 745.00
1989 0.00 0.00 0.00 0.00 71.50 169.14 a 541.00 519.00 265.50 28.00 0.00 0.00 1594.14
1990 0.00 0.00 0.00 8.50 30.00 0.00 z 0.00 z 542.50 321.00 32.00 2.50 0.00 936.50
1991 0.00 b 0.00 0.00 a 8.50 79.05 a 225.50 261.50 n 479.50 i 238.50 17.00 0.00 0.00 568.55
1992 0.00 a 0.00 0.00 1.50 144.00 213.00 356.50 422.00 168.00 61.50 0.00 0.00 1366.50
1993 0.00 0.00 0.00 0.00 91.50 176.00 439.50 0.00 z 114.50 0.00 z 0.00 0.00 821.50
1994 0.00 0.00 0.00 14.50 0.00 z 313.00 223.50 r 421.50 272.50 45.00 0.00 0.00 1066.50
1995 0.00 0.00 0.00 0.00 69.23 a 312.00 536.50 501.00 0.00 z 38.50 0.00 0.00 1457.23
1996 0.00 0.00 0.00 0.00 42.37 a 172.50 374.58 a 512.50 246.00 30.50 0.00 0.00 1378.45
1997 0.00 0.00 0.00 0.00 7.50 286.00 f 412.50 447.00 332.00 45.00 0.00 0.00 1244.00
1998 0.00 0.00 z 0.50 n 27.50 87.32 a 243.50 607.50 627.00 385.50 38.00 0.00 0.00 2016.32
1999 0.00 0.00 0.00 8.00 110.50 342.93 a 591.50 465.50 255.50 12.50 6.00 0.00 1792.43
2000 0.00 0.00 0.00 4.00 106.00 0.00 z 0.00 z 582.28 a 238.00 64.50 3.50 0.00 998.28
2001 0.00 0.00 0.00 26.00 122.50 261.50 0.00 z 570.00 245.00 33.07 a 14.00 0.00 1272.07
2002 0.00 0.00 0.00 1.50 54.00 275.50 564.50 342.03 a 209.00 30.50 0.00 0.00 1477.03
2003 0.00 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 0.00 0.00
2004 0.00 0.00 0.00 0.00 17.50 203.28 a 355.50 201.50 172.50 0.00 z 0.00 z 0.00 z 950.28
Period of Record Statistics
MEAN 0.00 0.00 0.05 6.69 68.42 230.26 492.95 473.63 233.48 45.83 1.30 0.00 1526.66
S.D. 0.00 0.00 0.30 11.05 42.24 58.95 81.74 94.94 65.34 37.52 4.05 0.00 208.04
SKEW 0.00 0.00 6.33 2.41 0.97 0.80 -0.03 -0.26 0.05 3.27 4.13 0.00 0.37
MAX 0.00 0.00 2.00 53.00 209.00 409.14 689.50 686.00 385.50 236.50 22.50 0.00 2037.14
MIN 0.00 0.00 0.00 0.00 7.50 112.50 353.50 201.50 114.50 10.50 0.00 0.00 1104.50
NO YRS 44 42 43 44 42 39 38 42 43 42 44 43 31