ST IGNATIUS, MONTANA

Monthly Total Growing Degree Days

(247286)

Base Temperature = 50 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201012
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
1896 0.00 z 0.00 e 0.00 15.00 59.00 351.00 407.50 n 163.50 t 123.00 19.63 a 0.00 a 3.88 c 571.51
1897 0.00 0.00 a 0.00 51.00 336.00 328.50 0.00 z 572.47 a 136.00 20.50 11.50 0.00 1455.97
1898 0.00 0.00 0.00 28.50 110.00 287.00 0.00 z 260.50 o 157.76 a 1.00 0.00 0.00 584.26
1899 0.00 b 0.00 0.00 a 15.50 56.50 231.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 303.50
1900 0.00 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
1901 0.00 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
1902 0.00 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
1903 0.00 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
1904 0.00 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
1905 0.00 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
1906 0.00 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
1907 0.00 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
1908 0.00 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 1.50 n 19.66 a 0.00 19.66
1909 0.00 a 0.00 g 0.00 0.50 90.93 a 294.00 409.09 c 431.33 b 233.50 36.17 a 3.50 0.00 a 1499.02
1910 0.00 0.00 a 0.00 b 125.50 187.50 317.00 568.85 a 350.00 174.44 c 73.50 5.36 b 0.00 a 1802.15
1911 0.00 a 0.00 c 1.07 b 13.45 a 57.00 301.50 270.50 l 329.38 c 151.55 a 9.30 a 0.00 0.00 a 863.24
1912 0.00 0.00 0.00 16.50 80.00 356.00 378.50 369.42 a 42.50 6.50 0.50 0.00 1249.92
1913 0.00 0.00 0.00 23.50 71.00 250.50 431.00 469.00 217.24 a 32.50 0.52 a 0.00 a 1495.26
1914 0.00 a 0.00 a 0.00 a 13.45 a 141.50 246.50 563.50 460.87 a 154.66 a 23.77 a 2.07 a 0.00 a 1606.31
1915 0.00 b 0.00 a 0.00 a 88.50 88.00 213.00 331.38 b 581.50 119.00 31.50 0.00 0.00 1452.88
1916 0.00 0.00 d 4.50 22.76 a 47.53 a 216.21 a 399.26 b 412.30 a 178.00 14.47 a 1.50 0.00 a 1296.52
1917 0.00 a 0.00 0.00 0.00 118.32 a 201.00 555.79 c 470.00 258.50 90.93 a 4.66 a 0.00 e 1699.19
1918 0.00 0.00 0.00 19.82 b 122.97 a 369.50 h 596.48 b 461.42 e 288.46 d 90.86 b 0.00 b 2.38 e 1582.40
1919 0.00 a 0.00 d 0.00 e 48.62 a 152.33 b 307.00 568.33 a 506.33 a 210.00 c 14.95 c 0.00 h 0.00 1807.56
1920 0.00 0.00 0.52 a 4.00 58.00 165.00 581.50 473.00 192.50 34.00 5.50 0.00 1514.02
1921 0.00 0.00 1.00 18.50 161.00 384.00 504.50 479.00 77.50 56.83 a 0.00 4.00 1686.33
1922 0.00 0.00 0.00 2.00 91.00 452.00 465.50 518.50 283.50 40.00 0.00 0.00 1852.50
1923 0.00 0.00 a 0.00 17.50 126.50 258.50 603.50 478.50 257.22 c 39.27 a 0.00 0.00 1780.99
1924 0.00 0.00 0.00 6.50 213.50 231.50 515.50 383.37 a 184.00 19.00 0.00 0.50 1553.87
1925 0.00 0.00 1.50 40.50 181.50 305.50 573.50 400.00 203.28 a 1.50 0.00 0.00 1707.28
1926 0.00 0.00 4.50 111.50 104.50 306.50 554.50 446.50 105.50 37.00 0.00 h 1.50 1672.00
1927 0.00 0.00 0.00 40.50 65.50 312.00 503.50 425.00 130.00 40.50 0.00 0.00 a 1517.00
1928 0.00 0.00 0.00 23.50 254.00 226.50 518.00 381.00 193.00 40.00 0.00 0.00 1636.00
1929 0.00 0.00 3.00 11.00 102.50 215.00 488.00 548.00 100.00 22.50 0.00 0.00 1490.00
1930 0.00 1.50 0.00 47.00 85.50 208.50 504.50 534.00 199.50 29.50 0.00 0.00 1610.00
1931 0.00 0.00 0.00 23.28 a 232.00 423.00 586.50 581.50 220.00 25.50 4.00 l 0.00 z 2091.78
1932 0.00 i 4.00 3.50 25.00 145.50 350.50 523.00 481.00 181.00 58.00 5.00 0.00 1776.50
1933 0.00 0.00 0.00 45.00 65.50 382.50 541.50 484.50 170.00 52.00 3.00 1.50 1745.50
1934 0.00 3.00 6.00 115.50 255.50 301.00 542.50 498.00 186.00 52.00 15.00 0.00 1974.50
1935 0.00 0.00 1.50 11.00 116.50 267.00 501.50 424.50 280.50 76.00 0.00 0.00 1678.50
1936 0.00 0.00 0.00 87.50 303.00 396.72 a 658.50 552.00 223.00 63.50 0.00 0.50 2284.72
1937 0.00 0.00 0.00 15.00 157.00 358.50 361.50 n 438.50 290.50 44.50 9.50 0.00 1313.50
1938 0.00 0.00 0.00 20.50 153.50 388.50 599.50 474.50 361.50 48.00 0.00 3.00 2049.00
1939 0.00 0.00 15.50 69.00 209.00 207.41 a 547.00 526.45 c 253.00 61.00 1.50 2.50 1892.36
1940 0.00 0.00 4.00 32.00 254.50 435.00 607.00 525.50 347.50 85.50 0.00 0.00 2291.00
1941 0.00 0.00 8.00 49.50 191.00 349.00 622.58 a 490.00 108.50 8.50 0.00 4.00 1831.08
1942 0.00 0.00 b 0.00 34.14 a 102.00 176.00 509.50 499.00 238.00 83.00 0.00 0.00 1641.64
1943 0.00 0.00 5.68 a 56.50 93.50 158.50 488.00 442.00 237.00 67.50 0.00 0.00 1548.68
1944 0.00 0.00 0.00 28.50 175.50 290.50 493.50 410.50 267.00 66.00 0.00 0.00 a 1731.50
1945 0.00 0.00 0.00 17.00 119.50 259.50 569.50 540.95 a 164.00 64.58 a 5.50 0.00 1740.53
1946 0.00 0.00 15.00 55.00 140.00 259.00 543.50 456.00 203.50 9.00 0.52 a 0.00 1681.52
1947 0.00 0.00 2.50 39.00 208.50 216.21 a 525.00 429.50 205.50 87.50 0.00 0.00 1713.71
1948 0.00 a 0.00 0.00 37.50 163.50 379.00 396.50 415.50 200.00 13.50 0.00 0.00 1605.50
1949 0.00 0.00 0.00 71.50 237.00 333.50 477.50 496.00 207.50 8.00 4.00 0.00 1835.00
1950 0.00 0.50 2.00 11.00 98.50 259.00 478.50 454.00 228.50 64.00 7.50 0.50 1604.00
1951 0.00 7.00 0.00 30.50 128.00 190.00 497.50 456.50 154.00 27.00 0.00 0.00 1490.50
1952 0.00 0.00 0.00 85.50 157.50 273.50 499.50 494.50 275.00 49.50 0.00 0.00 1835.00
1953 3.10 a 0.00 0.50 32.50 79.00 229.00 580.00 531.50 312.00 51.00 8.00 0.00 1826.60
1954 0.00 0.00 0.00 24.50 207.00 244.00 563.00 420.50 195.00 13.50 0.00 0.00 1667.50
1955 0.00 0.00 0.00 2.00 66.50 352.50 474.00 538.50 252.93 a 45.50 0.50 0.00 1732.43
1956 0.00 0.00 0.00 27.50 231.50 307.50 560.50 458.50 265.50 37.00 0.00 0.00 1888.00
1957 0.00 0.00 0.00 27.00 250.00 357.50 552.50 463.00 295.00 25.00 0.00 0.00 1970.00
1958 0.00 0.00 1.50 9.50 352.00 379.00 503.00 626.50 235.00 68.00 1.50 1.00 2177.00
1959 0.00 0.00 0.00 23.50 63.50 344.50 551.00 455.50 169.50 43.50 0.50 0.00 1651.50
1960 0.00 0.00 14.50 33.50 107.00 353.50 689.50 422.50 253.00 47.00 0.00 0.00 1920.50
1961 0.00 2.50 0.00 11.50 145.50 480.50 608.00 655.00 124.00 41.50 0.00 0.00 2068.50
1962 0.00 c 0.00 0.00 65.50 83.50 306.50 469.50 466.00 194.50 15.00 2.00 0.00 1602.50
1963 0.00 0.00 8.00 26.00 164.00 323.00 474.50 543.00 345.50 67.50 1.00 0.00 1952.50
1964 0.00 0.00 5.00 9.50 126.50 329.50 542.50 392.50 125.50 4.50 2.00 0.00 1537.50
1965 0.00 0.00 0.00 27.50 109.00 269.00 522.50 479.00 64.00 72.50 0.00 0.00 1543.50
1966 0.00 0.00 8.50 22.00 209.50 244.50 516.00 468.50 354.50 44.00 0.00 0.00 1867.50
1967 0.00 0.00 0.00 0.00 159.50 318.50 598.50 639.50 406.50 43.00 0.00 0.00 2165.50
1968 0.00 0.00 8.50 37.50 90.50 306.00 554.00 419.50 195.50 8.50 0.00 0.00 1620.00
1969 0.00 0.00 0.00 26.50 197.50 304.50 464.50 497.00 224.00 20.00 0.00 0.00 1734.00
1970 0.00 0.00 0.00 2.50 170.00 430.50 586.50 522.50 117.00 34.50 0.00 0.00 1863.50
1971 2.00 0.00 0.50 11.50 181.00 254.50 498.50 635.50 120.50 35.50 0.00 0.00 1739.50
1972 0.00 0.00 12.50 1.00 176.50 387.00 478.00 587.00 182.50 26.50 0.00 0.00 1851.00
1973 0.00 0.00 0.00 21.00 183.00 331.00 576.50 536.00 181.00 20.50 0.00 0.00 1849.00
1974 1.00 0.00 0.00 34.00 69.00 432.00 522.00 465.50 200.00 25.50 2.00 0.00 1751.00
1975 0.00 0.00 0.00 1.50 86.00 0.00 z 645.50 391.50 176.00 50.50 10.00 0.00 1361.00
1976 0.00 0.00 1.00 6.50 170.50 204.00 499.00 403.50 229.50 50.00 0.00 0.00 1564.00
1977 0.00 0.00 0.00 79.50 93.00 423.00 475.50 498.50 171.50 3.50 h 0.00 0.00 1741.00
1978 0.00 a 0.00 11.00 16.50 61.50 331.55 a 445.50 422.00 202.00 18.00 0.50 0.00 1508.55
1979 0.00 0.00 0.00 18.00 131.00 352.50 478.50 460.00 256.00 81.50 0.00 0.00 1777.50
1980 0.00 0.00 0.00 120.00 153.00 260.00 465.00 316.20 a 199.50 45.50 8.50 4.65 a 1572.35
1981 0.00 0.00 0.00 61.50 135.50 194.00 433.00 554.50 243.62 a 30.00 0.00 0.00 1652.12
1982 0.00 0.00 0.00 16.50 116.00 328.50 414.50 483.50 191.50 21.00 0.00 0.00 1571.50
1983 0.00 0.00 2.00 30.00 162.00 287.50 366.00 542.00 136.50 5.50 9.00 0.00 1540.50
1984 0.00 0.00 0.00 30.00 93.00 249.83 a 513.50 537.50 164.50 39.50 2.00 0.00 a 1629.83
1985 0.00 0.00 0.00 64.00 231.47 a 379.50 711.00 405.00 113.28 a 19.00 2.00 0.00 1925.24
1986 0.00 0.50 37.50 48.00 206.00 495.00 0.00 z 597.00 112.50 24.00 0.00 0.00 1520.50
1987 0.00 0.00 1.00 104.50 249.00 389.00 455.00 366.50 271.00 43.00 0.00 2.50 1881.50
1988 0.00 a 0.00 5.00 74.50 201.50 456.50 576.50 550.50 278.50 122.50 6.50 0.00 2272.00
1989 0.00 0.00 0.00 57.50 152.50 408.50 599.00 439.50 197.50 45.00 16.00 0.00 1915.50
1990 0.00 1.00 0.00 50.00 111.50 316.50 572.50 524.50 370.00 51.50 10.50 0.00 2008.00
1991 0.00 0.00 0.00 15.00 119.00 242.50 554.50 589.50 251.00 84.00 0.00 0.00 1855.50
1992 0.00 0.00 0.00 67.00 232.00 445.00 430.00 491.00 177.00 61.50 0.00 0.00 1903.50
1993 0.00 0.00 6.50 5.50 258.50 283.00 276.50 401.00 192.50 55.00 0.00 0.00 1478.50
1994 0.00 0.00 9.00 66.00 188.00 309.00 609.50 591.00 309.50 29.50 0.00 0.00 2111.50
1995 0.00 13.50 1.50 2.00 129.00 276.00 526.00 434.50 260.00 28.50 6.00 0.00 1677.00
1996 0.00 0.00 0.00 38.50 64.00 329.00 572.50 510.00 210.00 60.00 0.00 0.00 1784.00
1997 0.00 z 0.00 7.00 0.00 z 218.00 263.65 d 281.50 k 319.50 m 171.50 i 42.50 0.50 0.00 m 531.65
1998 0.00 p 0.00 0.00 i 50.50 j 166.50 254.00 646.00 589.50 416.50 27.50 0.50 0.00 2100.50
1999 0.00 0.00 8.50 28.00 125.50 288.00 466.00 579.00 188.00 33.00 27.50 0.00 1743.50
2000 0.00 0.00 3.50 36.00 136.00 288.00 543.00 528.00 202.00 15.50 0.00 0.00 a 1752.00
2001 0.00 0.00 0.00 28.00 211.00 259.00 522.50 586.00 348.50 21.00 4.14 a 0.00 p 1980.14
2002 0.00 0.00 0.00 10.50 116.50 323.50 633.50 439.00 275.00 29.50 2.00 0.00 1829.50
2003 0.00 0.00 16.50 34.00 173.00 381.00 698.50 620.00 299.50 109.50 3.50 0.00 2335.50
2004 0.00 0.00 24.00 49.50 111.50 326.00 618.50 553.00 207.00 58.00 0.00 0.00 o 1947.50
2005 0.00 k 0.00 i 3.50 34.50 142.00 253.80 e 603.00 467.00 f 237.50 19.50 g 5.50 i 0.00 k 1274.30
2006 0.00 e 0.50 0.00 d 41.00 217.00 410.00 692.50 547.00 265.50 53.50 14.00 0.00 2241.00
2007 0.00 0.00 24.00 42.00 185.50 380.00 799.00 516.50 262.00 51.00 0.50 0.00 2260.50
2008 0.00 0.00 1.50 17.50 165.50 286.00 581.00 523.50 214.00 58.50 0.00 0.00 1847.50
2009 0.00 0.00 0.00 30.50 172.50 337.00 550.50 499.50 344.50 5.00 0.00 0.00 1939.50
2010 0.00 0.00 0.50 35.00 102.00 0.00 z 484.00 471.50 202.00 54.00 7.00 0.00 1356.00
Period of Record Statistics
MEAN 0.06 0.33 2.88 34.61 149.78 309.85 532.29 487.49 215.00 41.29 2.49 0.32 1772.72
S.D. 0.38 1.57 5.95 27.88 63.85 73.71 82.13 71.20 72.98 24.69 4.73 0.96 227.87
SKEW 6.77 6.65 3.18 1.31 0.65 0.25 0.00 0.09 0.36 0.67 2.71 3.15 0.52
MAX 3.10 13.50 37.50 125.50 352.00 495.00 799.00 655.00 416.50 122.50 27.50 4.65 2335.50
MIN 0.00 0.00 0.00 0.00 47.53 158.50 276.50 316.20 42.50 1.00 0.00 0.00 1249.92
NO YRS 101 104 105 104 106 103 98 101 104 103 102 101 85