BLACKFOOT, IDAHO

Monthly Total Growing Degree Days

(100915)

Base Temperature = 50 F

File last updated on Apr 4, 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
1895 0.00 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 a 0.00 0.00
1896 0.00 0.00 6.56 e 10.00 102.82 a 392.50 613.00 540.00 223.00 22.00 5.00 0.00 c 1914.87
1897 0.00 0.00 0.00 45.50 339.00 407.00 537.50 577.12 a 270.50 51.00 5.00 0.00 2232.62
1898 0.00 0.00 0.00 68.50 153.00 433.00 618.50 610.00 206.50 0.00 g 0.00 0.00 2089.50
1899 0.00 0.00 0.00 11.50 96.50 361.00 487.00 f 398.50 223.00 15.00 0.00 0.00 1105.50
1900 0.00 0.00 3.00 31.00 246.50 590.50 534.00 490.00 237.00 10.00 t 0.00 0.00 2132.00
1901 0.00 0.00 0.00 36.50 353.50 387.50 753.00 674.00 181.50 58.38 a 0.00 0.00 2444.38
1902 0.00 0.00 0.00 16.50 244.00 455.50 559.00 732.50 0.00 z 0.00 u 7.00 0.00 2014.50
1903 0.00 0.00 0.00 16.50 131.50 480.00 593.00 0.00 z 0.00 z 3.50 q 0.00 0.00 1221.00
1904 0.00 0.00 d 0.00 30.00 69.50 472.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 g 572.00
1905 0.00 0.00 0.00 39.00 119.50 309.00 594.50 586.50 293.50 48.00 0.00 0.00 1990.00
1906 0.00 0.00 0.00 32.50 129.50 196.00 561.50 496.50 266.00 76.00 8.50 0.00 1766.50
1907 0.00 0.00 1.50 32.00 101.50 196.50 503.00 394.00 199.00 52.00 0.00 0.00 1479.50
1908 0.00 0.00 3.88 c 74.50 67.50 191.00 570.50 441.50 263.50 25.50 0.00 0.00 1637.88
1909 0.00 0.00 0.00 6.00 54.50 340.00 515.50 577.00 263.00 36.00 1.00 0.00 a 1793.00
1910 0.00 0.00 22.00 93.50 168.43 a 352.00 592.50 393.00 241.00 54.00 0.00 0.00 1916.43
1911 0.00 0.00 4.81 b 16.50 112.00 364.00 465.00 390.00 178.50 15.00 0.00 0.00 b 1545.81
1912 0.00 0.00 a 0.00 5.00 94.00 318.10 a 337.00 316.00 55.38 d 12.50 0.00 0.00 1137.99
1913 0.00 0.00 0.00 17.07 a 201.50 a 333.50 475.50 535.50 223.50 13.00 0.00 0.00 1799.57
1914 0.00 0.00 0.00 23.50 215.50 296.50 578.00 498.00 162.50 23.50 0.00 0.00 1797.50
1915 0.00 0.00 0.00 76.50 82.00 208.50 477.50 567.50 201.00 39.00 2.00 0.00 1654.00
1916 0.00 0.00 0.50 39.50 48.50 253.00 584.50 490.00 227.50 3.00 l 0.00 0.00 a 1643.50
1917 0.00 0.00 0.00 c 13.50 80.50 244.00 638.50 457.50 293.79 a 76.50 3.00 1.00 1808.29
1918 0.00 0.00 0.00 11.00 67.50 540.00 552.00 392.50 186.00 12.50 0.00 d 0.00 1761.50
1919 0.00 0.00 0.00 53.50 212.00 439.50 655.00 602.00 266.50 0.00 1.50 0.00 2230.00
1920 0.00 0.00 0.00 3.50 88.50 306.50 605.00 520.00 233.00 49.00 0.00 0.00 1805.50
1921 0.00 0.00 0.00 c 10.34 a 142.50 412.00 574.50 518.50 163.00 74.40 a 0.00 0.00 1895.24
1922 0.00 0.00 0.00 3.00 111.50 459.00 555.00 588.00 329.50 98.50 0.00 0.00 2144.50
1923 0.00 0.00 0.00 b 23.50 154.50 217.50 639.12 a 490.00 276.50 16.50 0.00 0.00 1817.62
1924 0.00 0.00 0.00 15.50 197.50 311.00 556.00 467.50 222.50 19.50 0.00 0.00 1789.50
1925 0.00 a 0.00 1.00 37.00 206.50 315.00 642.96 d 437.62 a 106.00 5.34 b 0.00 0.00 1751.42
1926 0.00 0.00 0.00 80.69 a 179.50 433.50 614.00 565.00 121.00 41.50 0.00 0.00 b 2035.19
1927 0.00 0.00 0.00 42.00 96.50 376.00 614.00 466.00 146.50 40.00 2.50 0.00 1783.50
1928 0.00 0.00 0.00 33.00 270.50 241.00 593.00 435.00 229.00 23.50 0.00 0.00 c 1825.00
1929 0.00 0.00 0.00 a 0.00 78.50 240.50 558.00 554.38 a 80.00 13.00 0.00 0.00 1524.38
1930 0.00 0.00 e 0.00 75.00 102.00 282.50 609.00 538.50 239.50 11.00 0.00 0.00 1857.50
1931 0.00 0.00 0.50 21.50 139.50 427.00 641.00 523.50 219.00 18.00 0.00 0.00 1990.00
1932 0.00 c 0.00 0.00 a 12.00 111.00 311.00 554.00 505.00 169.50 12.50 0.00 0.00 1675.00
1933 0.00 0.00 0.00 12.00 66.50 443.00 629.50 445.00 190.34 a 0.00 z 0.00 0.00 1786.34
1934 0.00 0.00 4.50 107.59 a 295.50 324.31 a 671.50 586.00 219.50 54.00 0.00 0.00 2262.90
1935 0.00 0.00 0.00 28.50 120.50 315.50 448.00 i 533.00 312.50 64.50 0.00 0.00 1374.50
1936 0.00 0.00 0.00 136.00 316.00 450.50 743.00 593.50 215.50 59.00 0.00 0.00 2513.50
1937 0.00 0.00 0.00 3.50 128.00 254.00 621.00 536.50 357.00 57.50 3.50 0.00 1961.00
1938 0.00 0.00 0.00 51.50 150.00 416.50 534.00 531.00 431.50 88.00 0.00 0.00 2202.50
1939 0.00 0.00 3.50 70.00 247.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 321.00
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 0.00
1941 0.00 0.00 3.00 25.00 246.00 397.50 693.50 595.50 189.50 39.50 11.38 a 0.00 2200.88
1942 0.00 0.00 0.00 82.00 128.00 f 218.50 o 735.50 630.73 e 343.89 c 124.00 a 0.00 0.00 1916.12
1943 0.00 0.00 15.00 146.50 186.00 303.46 d 699.57 a 664.50 418.50 176.00 2.00 0.00 2611.53
1944 0.00 0.00 0.00 13.00 244.79 b 303.00 634.00 601.50 337.00 132.50 0.00 0.00 2265.79
1945 0.00 0.00 0.00 40.50 214.00 283.50 712.50 666.00 286.50 164.00 2.00 0.00 a 2369.00
1946 0.00 0.00 8.00 154.50 183.50 480.50 781.50 661.00 288.50 24.00 0.00 0.00 2581.50
1947 0.00 0.00 i 1.50 14.50 241.00 222.00 633.50 525.00 218.00 0.00 z 0.00 0.00 1855.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 641.00 349.00 104.00 0.00 0.00 1094.00
1949 0.00 a 0.00 0.00 a 122.50 285.00 426.00 688.00 694.00 375.50 30.50 3.50 0.00 2625.00
1950 0.00 0.00 b 1.00 29.48 a 158.50 378.50 611.50 580.00 324.50 135.00 1.00 0.00 2219.48
1951 0.00 0.00 0.00 50.17 a 259.50 289.50 685.00 537.00 277.50 41.50 0.00 0.00 2140.17
1952 0.00 0.00 0.00 83.00 237.50 420.00 600.00 628.50 370.50 108.50 0.00 0.00 2448.00
1953 0.00 0.00 4.50 52.50 87.00 362.00 745.00 629.00 385.50 100.00 3.00 0.00 2368.50
1954 0.00 0.00 0.00 56.38 a 286.50 358.00 756.00 591.50 349.00 66.00 f 3.00 0.00 2400.38
1955 0.00 0.00 0.50 13.50 182.50 412.50 656.50 707.50 312.00 130.09 c 1.00 0.00 2416.09
1956 0.00 0.00 9.00 65.00 311.00 482.00 703.00 562.50 343.00 101.00 0.00 0.00 2576.50
1957 0.00 0.00 0.00 18.50 234.00 465.00 723.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1440.50
1958 0.00 z 0.00 z 0.00 z 0.00 z 386.90 e 250.50 n 296.50 l 380.00 j 158.00 j 58.50 h 0.00 z 0.00 m 386.90
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 4.00 u 53.98 b 0.00 b 0.00 53.98
1960 0.00 a 0.00 31.52 a 75.52 a 152.93 a 452.50 720.00 502.00 355.00 68.00 3.50 0.00 2360.97
1961 0.00 0.00 0.00 40.34 a 220.00 515.50 685.50 674.00 149.50 42.50 0.00 0.00 2327.34
1962 0.00 0.00 0.00 83.50 109.50 413.00 565.00 503.00 270.00 70.00 0.00 0.00 2014.00
1963 0.00 0.00 8.00 17.50 221.50 279.00 625.00 558.50 383.00 177.50 2.00 0.00 2272.00
1964 0.00 a 0.00 0.00 z 13.00 208.50 0.00 z 0.00 z 502.50 178.45 a 60.85 d 0.00 0.00 963.30
1965 0.00 a 0.00 a 0.52 a 47.50 101.00 336.50 0.00 z 475.00 0.00 z 84.50 0.00 b 0.00 1045.02
1966 0.00 0.00 8.00 28.50 262.50 381.50 699.00 578.00 395.17 a 25.50 0.00 0.00 2378.17
1967 0.00 0.00 2.58 a 2.00 213.50 337.50 661.85 a 605.57 b 354.00 46.50 0.50 0.00 2224.00
1968 0.00 0.00 0.00 21.00 133.00 358.00 634.47 a 296.00 j 227.31 d 42.50 0.00 0.00 1416.27
1969 0.00 0.00 1.00 48.50 269.50 333.50 608.00 627.00 353.00 13.50 7.50 0.00 2261.50
1970 0.00 0.00 0.00 4.00 170.50 348.50 545.00 551.00 116.00 37.50 0.00 0.00 1772.50
1971 0.00 0.00 0.00 9.50 158.50 313.50 565.00 589.50 157.50 34.00 0.00 0.00 a 1827.50
1972 0.00 0.00 7.00 13.50 148.00 360.00 490.00 494.00 182.00 47.00 0.00 a 0.00 1741.50
1973 0.00 0.00 0.00 11.00 196.50 368.00 574.50 548.50 228.50 59.93 a 2.00 0.00 1988.93
1974 0.00 0.00 0.00 a 41.50 150.50 485.50 612.50 468.50 235.00 28.00 0.00 0.00 2021.50
1975 0.00 0.00 a 0.00 0.00 91.00 312.50 670.63 a 436.30 d 234.31 a 66.81 b 0.00 b 0.00 c 1811.55
1976 0.00 d 0.00 g 0.00 c 2.22 c 188.98 e 273.21 b 610.04 c 436.30 d 312.93 a 34.21 b 0.00 a 0.00 b 1857.89
1977 0.00 c 0.00 0.00 z 0.00 z 105.50 515.00 580.50 521.00 247.00 52.00 1.50 0.00 2022.50
1978 0.00 0.00 18.00 18.50 108.50 317.50 562.50 469.50 253.50 0.00 z 0.00 z 0.00 z 1748.00
1979 0.00 0.00 0.00 33.60 e 197.37 a 390.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 c 621.47
1980 0.00 c 0.00 a 0.00 117.78 c 136.50 336.00 599.85 a 495.50 280.18 b 105.00 0.00 z 0.00 c 2070.81
1981 0.00 a 0.00 0.00 71.00 141.50 0.00 z 565.00 618.50 312.41 a 34.50 0.00 c 0.00 z 1742.91
1982 0.00 a 0.00 0.00 12.50 116.50 341.38 a 537.50 598.50 238.00 17.00 0.00 z 0.00 i 1861.38
1983 0.00 0.00 3.00 2.00 138.98 a 283.97 a 497.50 638.50 101.00 p 2.50 l 1.50 l 0.00 a 1563.95
1984 0.00 e 0.00 b 0.00 23.00 208.50 294.00 622.00 617.00 241.00 63.00 0.00 0.00 b 2068.50
1985 0.00 u 0.00 0.00 71.50 224.50 421.50 703.00 483.00 188.00 28.50 0.00 0.00 2120.00
1986 0.00 2.00 29.50 24.00 197.00 496.55 a 492.50 602.78 d 149.00 j 7.23 a 0.00 c 0.00 1851.56
1987 0.00 a 0.00 0.00 101.38 a 208.50 0.00 z 509.00 458.00 0.00 z 69.50 0.00 z 0.00 1346.38
1988 0.00 0.00 0.00 96.50 197.88 a 557.50 657.50 562.00 238.00 145.00 0.00 0.00 2454.38
1989 0.00 0.00 0.00 66.00 136.00 364.00 656.00 479.50 289.50 50.50 0.00 e 0.00 z 2041.50
1990 0.00 0.00 0.00 q 21.50 p 89.00 i 242.00 i 581.00 546.50 415.50 31.50 f 0.00 z 0.00 1543.00
1991 0.00 0.00 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
1992 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 387.00 438.00 529.00 202.00 65.00 0.00 0.00 1621.00
1993 0.00 0.00 2.50 2.00 212.50 222.50 155.00 o 380.50 195.00 51.00 0.00 0.00 1066.00
1994 0.00 0.00 0.00 75.50 221.00 356.50 539.00 571.50 312.50 27.50 0.00 0.00 z 2103.50
1995 0.00 0.00 z 0.00 11.00 69.00 233.28 a 445.00 492.90 a 251.50 24.00 0.00 a 0.00 1526.68
1996 0.00 0.00 0.00 26.00 71.00 362.50 547.00 492.00 198.00 101.00 0.00 a 0.00 1797.50
1997 0.00 0.00 0.00 k 15.00 175.00 363.62 a 466.00 557.50 333.00 42.00 0.00 0.00 1952.12
1998 0.00 0.00 0.00 24.50 120.00 0.00 z 0.00 z 601.00 400.00 30.00 0.00 z 0.00 a 1175.50
1999 0.00 c 0.00 b 0.00 d 0.00 z 0.00 z 313.45 a 543.07 d 559.19 e 170.50 i 42.00 h 5.00 f 0.00 a 1415.71
2000 0.00 f 0.00 b 0.00 x 82.78 c 179.28 a 388.20 e 611.98 b 623.21 b 0.00 z 28.00 h 0.00 e 0.00 1885.45
2001 0.00 z 0.00 z 0.00 z 62.00 f 190.00 g 412.24 a 587.00 f 726.12 e 430.56 c 0.00 z 0.00 z 0.00 z 1568.91
2002 0.00 z 0.00 z 0.00 z 0.00 z 179.50 i 315.00 l 778.00 533.00 343.50 10.50 0.00 r 0.00 1665.00
2003 0.00 0.00 13.00 61.50 222.50 h 353.50 g 832.23 e 702.27 e 323.00 163.00 0.00 0.00 a 2095.00
2004 0.00 0.00 25.63 e 65.00 184.00 403.50 670.50 567.00 275.00 92.00 0.00 0.00 2282.63
2005 0.00 0.00 z 0.00 31.00 168.00 327.50 702.00 616.00 266.00 61.50 3.50 0.00 2175.50
2006 0.00 0.00 z 0.00 47.00 254.50 513.00 824.50 597.00 191.50 i 66.00 15.50 0.00 2317.50
2007 0.00 b 0.00 20.67 d 58.00 274.83 e 0.00 z 870.38 e 397.00 n 317.00 13.00 1.20 e 0.00 e 1555.08
2008 0.00 d 0.00 p 0.00 g 33.00 e 116.00 j 380.00 574.50 f 634.50 266.00 69.00 13.50 0.00 1396.00
2009 0.00 0.00 0.00 f 31.50 218.00 327.50 0.00 z 577.50 439.00 27.50 1.00 0.00 1622.00
2010 0.00 0.00 0.00 b 47.00 64.00 363.00 616.00 591.00 315.00 120.50 3.50 0.00 2120.00
2011 0.00 0.00 0.00 c 10.00 90.42 a 320.69 a 680.00 687.96 e 394.66 a 105.92 a 0.00 0.00 2289.64
2012 0.00 0.00 27.50 102.50 189.50 429.11 b 750.50 721.50 360.54 b 78.50 6.50 0.00 2666.14
2013 0.00 a 0.00 2.50 0.50 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 2.50
Period of Record Statistics
MEAN 0.00 0.02 2.84 41.06 171.82 362.46 614.66 550.09 265.49 57.28 1.25 0.01 2049.19
S.D. 0.00 0.20 6.67 34.62 73.22 85.16 91.24 84.09 82.41 41.12 2.79 0.10 323.66
SKEW 0.00 10.10 2.88 1.14 0.47 0.19 0.14 -0.12 0.03 1.07 3.10 10.20 -0.10
MAX 0.00 2.00 31.52 154.50 386.90 590.50 870.38 732.50 439.00 177.50 15.50 1.00 2666.14
MIN 0.00 0.00 0.00 0.00 48.50 191.00 337.00 316.00 55.38 0.00 0.00 0.00 1137.99
NO YRS 109 105 104 106 105 102 100 106 100 96 102 107 66