DULUTH INTL AP, MINNESOTA

Monthly Total Growing Degree Days

(212248)

Base Temperature = 50 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 15.00 0.00 0.00 15.00
1949 0.00 0.00 a 0.00 46.50 91.50 396.50 520.50 511.00 119.00 40.50 0.50 0.00 1726.00
1950 0.00 0.00 0.00 0.00 80.00 254.50 373.00 259.50 169.50 33.00 0.00 0.00 1169.50
1951 0.00 0.00 0.00 8.50 161.50 244.00 459.00 283.50 106.00 28.50 0.00 0.00 1291.00
1952 0.00 0.00 0.00 108.50 96.50 327.50 512.50 383.50 209.00 0.00 0.00 0.00 1637.50
1953 0.00 0.00 0.00 0.50 107.00 306.50 468.00 527.00 172.50 145.70 a 4.00 0.00 1731.20
1954 0.00 0.00 0.00 1.00 41.00 343.50 480.00 409.50 127.50 13.00 0.00 0.00 1415.50
1955 0.00 0.00 0.00 54.50 152.00 364.50 600.00 549.00 184.00 46.50 0.00 0.00 1950.50
1956 0.00 0.00 0.00 0.00 69.50 356.00 361.50 379.00 97.50 70.00 2.00 0.00 1335.50
1957 0.00 0.00 0.00 53.00 97.50 223.50 514.00 439.00 133.50 16.50 0.00 0.00 1477.00
1958 0.00 0.00 0.00 23.50 98.50 172.00 406.50 424.00 185.50 26.00 0.00 0.00 1336.00
1959 0.00 0.00 0.00 2.50 95.00 329.00 528.00 477.50 193.50 8.00 0.00 0.00 1633.50
1960 0.00 0.00 0.00 7.50 107.50 251.00 492.50 458.50 204.00 47.50 0.00 0.00 1568.50
1961 0.00 0.00 0.00 0.00 111.50 338.00 468.00 544.50 211.50 74.50 0.00 0.00 1748.00
1962 0.00 0.00 0.00 9.00 102.00 224.50 333.00 366.50 102.50 39.50 0.00 0.00 1177.00
1963 0.00 0.00 3.00 13.00 105.00 352.00 523.00 401.00 256.00 219.00 0.00 0.00 1872.00
1964 0.00 0.00 0.00 9.50 165.50 263.50 500.50 283.00 127.00 56.00 1.50 0.00 1406.50
1965 0.00 0.00 0.00 15.00 114.00 243.50 368.00 348.50 54.00 30.00 0.00 0.00 1173.00
1966 0.00 0.00 0.00 2.50 80.50 340.00 558.50 357.00 174.00 28.50 0.00 0.00 1541.00
1967 0.00 0.00 3.00 0.00 47.50 251.50 437.50 361.00 229.00 33.00 0.00 0.00 1362.50
1968 0.00 0.00 1.00 27.00 41.00 223.00 438.00 364.50 207.50 60.50 0.00 0.00 1362.50
1969 0.00 0.00 0.00 4.50 107.50 134.00 433.50 574.00 229.00 27.00 0.00 0.00 1509.50
1970 0.00 0.00 0.00 14.00 57.00 323.50 583.50 493.50 219.00 23.00 0.00 0.00 1713.50
1971 0.00 0.00 0.00 2.50 59.00 352.00 370.50 384.50 256.00 68.50 0.00 0.00 1493.00
1972 0.00 0.00 0.00 1.00 186.50 264.00 348.00 369.50 77.50 14.00 0.00 0.00 1260.50
1973 0.00 0.00 0.00 15.50 44.50 274.00 457.50 478.50 155.00 82.00 0.00 0.00 1507.00
1974 0.00 0.00 0.00 8.50 47.00 265.00 529.00 314.50 57.00 16.00 0.00 0.00 1237.00
1975 0.00 0.00 0.00 0.00 154.50 236.50 579.50 369.50 84.00 56.00 17.50 0.00 1497.50
1976 0.00 0.00 0.00 14.50 94.50 395.50 497.50 462.00 203.50 19.50 0.00 0.00 1687.00
1977 0.00 0.00 0.00 55.00 245.50 301.50 491.50 268.50 116.00 5.50 0.00 0.00 1483.50
1978 0.00 0.00 0.00 5.00 198.50 310.50 455.00 421.50 234.00 39.50 9.50 0.00 1673.50
1979 0.00 0.00 0.00 0.00 57.50 294.00 500.00 372.50 211.00 16.00 0.00 0.00 1451.00
1980 0.00 0.00 0.00 38.50 214.50 289.50 544.00 421.00 150.50 19.50 0.00 0.00 1677.50
1981 0.00 0.00 0.00 4.00 97.50 261.50 480.00 442.50 147.50 7.50 3.50 0.00 1444.00
1982 0.00 0.00 0.00 21.00 126.00 155.50 450.00 337.50 166.50 13.50 0.00 0.00 1270.00
1983 0.00 0.00 0.00 0.50 32.50 300.50 606.00 609.50 230.00 18.00 0.00 0.00 1797.00
1984 0.00 0.00 0.00 7.00 90.50 341.00 515.50 549.00 134.00 53.50 0.00 0.00 1690.50
1985 0.00 0.00 0.00 41.50 165.50 202.50 453.00 299.50 152.00 8.50 0.00 0.00 1322.50
1986 0.00 0.00 5.00 10.50 144.50 270.50 455.50 338.50 114.50 29.00 0.00 0.00 1368.00
1987 0.00 0.00 3.50 57.50 157.00 393.00 545.00 416.00 219.00 8.50 0.50 0.00 1800.00
1988 0.00 0.00 0.00 9.00 220.50 387.50 618.00 450.00 168.00 18.50 0.00 0.00 1871.50
1989 0.00 0.00 0.00 1.00 134.50 267.50 575.00 458.00 217.50 56.00 0.00 0.00 1709.50
1990 0.00 0.00 0.00 82.50 43.50 347.50 450.50 435.00 212.00 9.50 5.00 0.00 1585.50
1991 0.00 0.00 0.00 42.00 259.00 349.00 427.50 505.00 163.50 8.00 0.00 0.00 1754.00
1992 0.00 0.00 0.00 4.00 185.00 210.00 296.00 326.00 152.50 36.50 0.00 0.00 1210.00
1993 0.00 0.00 0.00 1.50 86.00 213.00 421.00 464.00 56.50 15.50 0.00 0.00 1257.50
1994 0.00 0.00 0.00 20.00 171.50 373.00 449.50 385.50 262.50 43.00 0.00 0.00 1705.00
1995 0.00 0.00 0.00 0.00 115.00 457.50 518.50 538.00 203.00 49.00 0.00 0.00 1881.00
1996 0.00 0.00 0.00 0.00 68.50 315.50 375.50 478.00 203.00 39.50 0.00 0.00 1480.00
1997 0.00 0.00 0.00 0.00 30.00 364.50 428.50 340.00 230.50 75.50 0.00 0.00 1469.00
1998 0.00 0.00 0.00 38.00 195.00 280.50 487.50 530.00 294.00 32.50 0.00 0.00 1857.50
1999 0.00 0.00 0.00 5.00 155.50 329.50 546.50 417.00 161.50 13.00 7.76 a 0.00 1635.76
2000 0.00 a 0.00 3.00 9.00 126.50 202.50 451.00 455.50 164.00 64.50 2.00 0.00 1478.00
2001 0.00 0.00 0.00 28.00 118.50 329.50 487.00 527.00 190.50 25.00 14.00 0.00 1719.50
2002 0.00 0.00 0.00 16.50 94.00 366.00 590.50 422.00 284.00 12.50 0.00 a 0.00 1785.50
2003 0.00 0.00 0.00 20.50 80.50 293.00 503.00 545.00 234.00 72.50 0.00 0.00 1748.50
2004 0.00 0.00 0.00 3.50 23.50 218.50 414.50 276.50 275.00 37.00 0.00 0.00 1248.50
2005 0.00 0.00 0.00 18.50 77.50 358.00 544.50 456.00 299.50 52.00 0.00 0.00 1806.00
2006 0.00 0.00 0.00 23.50 159.00 386.00 680.00 494.50 171.00 34.50 0.00 0.00 1948.50
2007 0.00 0.00 7.00 34.50 167.00 391.50 539.50 468.50 254.50 61.00 0.00 0.00 1923.50
2008 0.00 0.00 0.00 3.50 53.00 307.50 447.00 446.50 192.00 0.00 z 11.50 0.00 a 1461.00
2009 0.00 0.00 0.00 8.50 80.50 282.50 375.50 378.50 374.50 0.00 0.00 0.00 1500.00
2010 0.00 0.00 6.50 15.00 200.50 294.00 589.00 562.50 88.50 60.00 0.50 0.00 1816.50
2011 0.00 0.00 0.00 2.00 72.50 242.50 615.00 519.50 231.00 112.00 0.00 0.00 1794.50
2012 0.00 0.00 43.50 19.50 175.50 426.50 677.50 500.50 217.50 19.00 0.00 0.00 2079.50
2013 0.00 0.00 0.00 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 0.00
Period of Record Statistics
MEAN 0.00 0.00 1.16 17.01 114.64 299.41 486.63 428.56 183.12 39.10 1.23 0.00 1572.40
S.D. 0.00 0.00 5.54 21.46 56.28 67.82 81.27 84.55 64.21 35.46 3.43 0.00 229.55
SKEW 0.00 0.00 7.08 2.02 0.52 -0.14 0.09 -0.07 0.12 2.59 3.25 0.00 -0.01
MAX 0.00 0.00 43.50 108.50 259.00 457.50 680.00 609.50 374.50 219.00 17.50 0.00 2079.50
MIN 0.00 0.00 0.00 0.00 23.50 134.00 296.00 259.50 54.00 0.00 0.00 0.00 1169.50
NO YRS 65 65 65 64 64 64 64 64 64 64 65 65 63