WEST YELLOWSTONE, MONTANA

Monthly Total Growing Degree Days

(248857)

Base Temperature = 50 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 199603
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
1924 0.00 a 0.00 0.00 0.00 0.50 37.50 181.00 111.00 58.27 d 0.00 c 0.00 c 0.00 b 388.27
1925 0.00 c 0.00 d 0.00 f 0.00 l 2.00 f 103.00 p 277.50 147.00 42.93 a 0.00 0.00 b 0.00 b 467.43
1926 0.00 e 0.00 d 0.00 b 0.00 f 47.00 143.57 b 298.00 205.50 3.75 b 6.00 0.00 0.00 g 703.82
1927 0.00 e 0.00 i 0.00 f 0.00 k 16.61 c 125.00 280.00 121.42 a 52.50 0.00 a 0.00 0.00 c 595.52
1928 0.00 g 0.00 l 0.00 0.00 d 33.00 33.62 a 264.03 b 103.50 24.64 b 0.00 b 0.00 a 0.00 458.80
1929 0.00 k 0.00 c 0.00 d 0.00 c 2.87 d 63.00 261.50 301.00 8.50 g 0.00 b 0.00 0.00 628.37
1930 0.00 0.00 f 0.00 f 0.00 d 0.00 z 27.50 248.50 237.00 25.50 0.00 0.00 0.00 e 538.50
1931 0.00 c 0.00 c 0.00 j 0.00 0.50 o 0.00 z 299.67 a 215.00 30.00 n 0.00 b 0.50 0.00 515.17
1932 0.00 0.00 0.00 a 0.00 11.00 111.67 c 253.96 e 190.50 13.50 0.00 a 0.00 0.00 580.63
1933 0.00 0.00 0.00 0.00 0.50 150.54 b 381.62 b 219.58 a 54.00 0.00 b 0.00 b 0.00 806.24
1934 0.00 0.00 0.00 0.00 65.00 84.50 331.50 251.50 34.00 7.00 0.00 0.00 773.50
1935 0.00 0.00 0.00 0.00 0.00 73.00 309.50 201.50 48.00 2.50 0.00 0.00 e 634.50
1936 0.00 0.00 0.00 h 0.00 64.00 220.50 468.00 279.50 30.52 a 0.00 0.00 b 0.00 c 1062.52
1937 0.00 g 0.00 g 0.00 f 0.00 j 14.39 c 117.41 a 300.50 224.23 a 93.62 a 0.00 c 0.00 d 0.00 d 750.16
1938 0.00 g 0.00 f 0.00 f 0.00 a 12.50 121.00 246.00 211.00 90.00 2.00 0.00 0.00 682.50
1939 0.00 0.00 0.00 0.00 35.00 61.00 338.50 249.00 54.00 0.00 a 0.00 0.00 737.50
1940 0.00 0.00 0.00 0.00 25.00 161.50 319.00 282.00 98.50 0.00 0.00 0.00 886.00
1941 0.00 0.00 0.00 0.00 19.52 d 121.00 300.50 249.50 8.50 0.00 0.00 0.00 699.02
1942 0.00 0.00 0.00 0.00 11.00 54.50 329.50 278.00 58.50 0.00 0.00 0.00 731.50
1943 0.00 0.00 0.00 0.00 14.00 78.10 a 262.00 202.00 40.50 1.50 0.00 f 0.00 598.10
1944 0.00 0.00 a 0.00 0.00 14.00 31.00 197.00 143.50 32.50 0.00 0.00 0.00 418.00
1945 0.00 0.00 0.00 1.00 0.00 59.00 241.50 182.00 49.00 0.00 0.00 0.00 532.50
1946 0.00 0.00 0.00 0.00 4.00 79.00 309.00 212.50 40.00 0.00 0.00 b 0.00 644.50
1947 0.00 0.00 0.00 a 0.00 l 0.00 z 20.00 l 285.50 191.50 62.50 2.50 0.00 0.00 542.00
1948 0.00 0.00 0.00 z 0.00 i 34.62 a 139.14 a 252.13 a 210.50 40.00 1.00 0.00 0.00 677.39
1949 0.00 0.00 a 0.00 a 0.00 24.00 101.50 287.00 262.50 29.48 a 0.00 0.00 b 0.00 f 704.48
1950 0.00 b 0.00 0.00 0.00 0.00 87.50 194.00 167.00 90.50 0.00 0.00 0.00 539.00
1951 0.00 0.00 0.00 0.00 17.57 a 27.50 252.00 159.00 10.34 a 0.00 0.00 0.00 466.41
1952 0.00 0.00 0.00 0.00 0.00 106.00 214.00 242.50 76.00 0.00 0.00 a 0.00 c 638.50
1953 0.00 0.00 0.00 a 0.00 1.00 80.00 383.00 268.00 86.38 a 0.00 a 0.00 0.00 818.38
1954 0.00 0.00 0.00 d 0.00 35.50 85.50 365.00 187.50 37.00 0.00 0.00 0.00 710.50
1955 0.00 0.00 0.00 0.00 3.00 80.50 328.00 314.50 83.00 0.00 b 0.00 0.00 809.00
1956 0.00 0.00 0.00 0.00 65.00 157.50 315.50 186.00 66.50 4.00 0.00 0.00 794.50
1957 0.00 0.00 0.00 0.00 13.00 112.00 321.50 270.00 49.00 6.00 0.00 0.00 771.50
1958 0.00 0.00 0.00 0.00 99.50 119.50 201.00 313.50 46.00 0.00 0.00 0.00 779.50
1959 0.00 0.00 0.00 0.00 2.00 194.00 299.00 234.00 88.00 1.00 0.00 0.00 818.00
1960 0.00 0.00 0.00 0.00 20.50 123.00 407.50 217.50 53.50 1.00 0.00 0.00 823.00
1961 0.00 0.00 0.00 0.00 29.00 224.00 355.50 342.00 13.50 0.00 0.00 0.00 964.00
1962 0.00 0.00 0.00 0.00 2.50 152.50 224.50 195.00 35.00 7.50 0.00 0.00 617.00
1963 0.00 0.00 0.00 0.00 6.00 80.00 289.50 297.00 119.50 5.50 0.00 0.00 797.50
1964 0.00 0.00 0.00 0.00 26.50 84.00 365.50 185.00 5.00 0.00 0.00 0.00 666.00
1965 0.00 0.00 0.00 0.00 6.50 65.00 268.00 199.00 3.50 2.00 0.00 0.00 544.00
1966 0.00 0.00 0.00 0.00 54.00 114.50 401.50 216.50 102.00 0.00 0.00 0.00 888.50
1967 0.00 0.00 0.00 0.00 17.00 80.00 342.50 323.00 120.00 0.00 0.00 0.00 882.50
1968 0.00 0.00 0.00 0.00 9.50 107.50 372.50 169.50 43.50 0.00 0.00 0.00 702.50
1969 0.00 0.00 0.00 0.00 42.00 93.00 308.00 336.87 a 73.00 0.00 0.00 0.00 852.87
1970 0.00 0.00 0.00 0.00 11.50 198.00 344.00 364.50 24.00 0.00 0.00 0.00 942.00
1971 0.00 0.00 0.00 0.00 13.00 121.00 273.50 395.00 20.00 0.00 0.00 0.00 822.50
1972 0.00 0.00 0.00 0.00 23.00 138.50 232.00 261.50 21.00 0.00 0.00 0.00 676.00
1973 0.00 0.00 0.00 0.00 c 10.00 142.00 300.50 269.00 36.00 0.00 0.00 0.00 757.50
1974 0.00 0.00 s 0.00 c 0.00 7.50 224.50 368.50 185.50 45.50 0.00 0.00 a 0.00 831.50
1975 0.00 0.00 0.00 0.00 0.00 55.00 382.50 143.50 47.50 8.00 0.00 0.00 636.50
1976 0.00 0.00 0.00 0.00 3.50 104.00 349.00 186.50 51.50 0.00 0.00 q 0.00 694.50
1977 0.00 0.00 0.00 d 0.00 a 3.00 246.00 310.00 240.00 43.50 0.00 c 0.00 0.00 842.50
1978 0.00 0.00 0.00 0.00 13.00 103.50 277.00 181.50 78.00 0.00 b 0.00 n 0.00 l 653.00
1979 0.00 j 0.00 h 0.00 z 0.00 x 25.50 139.50 342.00 245.50 79.50 0.50 0.00 0.00 832.50
1980 0.00 a 0.00 z 0.00 p 0.00 x 12.50 105.00 285.00 123.50 45.00 0.00 0.00 0.00 571.00
1981 0.00 0.00 0.00 a 0.00 12.00 113.50 268.00 277.00 94.00 0.00 0.00 0.00 764.50
1982 0.00 0.00 0.00 0.00 2.50 102.00 241.00 286.00 64.00 0.00 0.00 0.00 695.50
1983 0.00 0.00 0.00 0.00 27.00 57.00 226.00 346.50 41.50 0.00 0.00 0.00 698.00
1984 0.00 0.00 0.00 0.00 19.00 100.50 312.50 256.00 33.00 0.00 a 0.00 0.00 721.00
1985 0.00 0.00 0.00 0.00 17.50 113.50 321.00 125.00 17.50 0.00 0.00 l 0.00 594.50
1986 0.00 0.00 0.00 0.00 49.50 188.50 188.00 282.00 0.00 z 0.00 0.00 a 0.00 708.00
1987 0.00 0.00 0.00 5.00 41.00 147.00 227.50 152.00 68.00 0.00 0.00 0.00 640.50
1988 0.00 0.00 0.00 0.00 36.00 270.50 370.00 260.00 67.00 4.50 0.00 0.00 1008.00
1989 0.00 0.00 0.00 0.00 i 12.00 116.50 406.00 233.00 19.00 4.50 0.00 0.00 791.00
1990 0.00 0.00 0.00 0.00 8.50 139.00 331.50 280.50 144.00 2.50 0.00 0.00 b 906.00
1991 0.00 b 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 336.50 64.00 1.50 0.00 0.00 402.00
1992 0.00 0.00 0.00 2.50 65.50 168.50 182.00 134.50 l 27.00 3.00 0.00 0.00 448.50
1993 0.00 m 0.00 o 0.00 0.00 43.00 69.00 75.00 156.50 38.00 5.17 a 0.00 0.00 i 386.67
1994 0.00 a 0.00 0.00 2.00 54.50 94.50 o 324.00 342.00 91.50 0.00 0.00 a 0.00 a 814.00
1995 0.00 0.00 0.00 0.00 4.50 93.00 261.00 238.00 0.00 z 0.00 0.00 0.00 596.50
1996 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
Period of Record Statistics
MEAN 0.00 0.00 0.00 0.17 21.10 113.78 294.77 232.01 52.15 1.10 0.01 0.00 729.46
S.D. 0.00 0.00 0.00 0.75 20.74 52.70 65.79 65.53 30.40 2.09 0.06 0.00 139.13
SKEW 0.00 0.00 0.00 5.13 1.41 0.81 -0.30 0.20 0.66 1.91 8.06 0.00 -0.42
MAX 0.00 0.00 0.00 5.00 99.50 270.50 468.00 395.00 144.00 8.00 0.50 0.00 1008.00
MIN 0.00 0.00 0.00 0.00 0.00 27.50 75.00 103.50 3.50 0.00 0.00 0.00 388.27
NO YRS 67 63 62 62 67 67 71 71 68 72 68 68 45