YELLOWSTONE PARK, WYOMING

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(489905)

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.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
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
1894 -25.00 -24.00 -5.00 ----- z ----- z ----- z 47.00 49.00 36.00 26.00 o -1.00 -17.00 -25.00
1895 -23.00 -26.00 -17.00 11.00 20.00 28.00 33.00 36.00 0.00 14.00 -10.00 -6.00 -26.00
1896 -16.00 -5.00 -21.00 0.00 19.00 32.00 37.00 30.00 21.00 c 19.00 -27.00 10.00 -27.00
1897 ----- z -10.00 -17.00 11.00 23.00 33.00 32.00 37.00 26.00 14.00 1.00 -19.00 -19.00
1898 -20.00 1.00 -22.00 6.00 23.00 31.00 32.00 37.00 25.00 12.00 -13.00 -15.00 -22.00
1899 -11.00 -35.00 -10.00 10.00 15.00 26.00 34.00 34.00 27.00 13.00 12.00 -2.00 -35.00
1900 -12.00 -25.00 -4.00 21.00 30.00 30.00 32.00 38.00 12.00 18.00 -12.00 -25.00 -25.00
1901 -15.00 -15.00 1.00 7.00 29.00 20.00 30.00 39.00 25.00 a 26.00 11.00 e -3.00 b -15.00
1902 -30.00 -19.00 -2.00 9.00 23.00 30.00 35.00 30.00 25.00 25.00 3.00 -5.00 -30.00
1903 -1.00 -20.00 -3.00 8.00 21.00 31.00 34.00 36.00 18.00 18.00 -10.00 2.00 -20.00
1904 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1905 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1906 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1907 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1908 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1909 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1910 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1911 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1912 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1913 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1914 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1915 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1916 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1917 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1918 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1919 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1920 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1921 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1922 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1923 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1924 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1925 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1926 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1927 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1928 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1929 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1930 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1931 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1932 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1933 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1934 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1935 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1936 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1937 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1938 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1939 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1940 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1941 ----- z ----- z ----- z ----- z ----- z 34.00 41.00 33.00 23.00 12.00 -10.00 -14.00 a -14.00
1942 -28.00 -19.00 1.00 22.00 20.00 25.00 38.00 35.00 25.00 9.00 5.00 -10.00 a -28.00
1943 ----- z -8.00 -19.00 23.00 18.00 29.00 36.00 35.00 24.00 22.00 3.00 -8.00 -19.00
1944 -12.00 -9.00 -13.00 17.00 24.00 32.00 36.00 34.00 21.00 22.00 5.00 -18.00 -18.00
1945 -7.00 -5.00 -14.00 -4.00 12.00 25.00 33.00 34.00 18.00 10.00 a -1.00 -15.00 -15.00
1946 -4.00 -7.00 5.00 16.00 20.00 31.00 38.00 31.00 23.00 14.00 0.00 -12.00 -12.00
1947 -20.00 -23.00 -17.00 11.00 21.00 29.00 36.00 31.00 25.00 20.00 -6.00 a -9.00 -23.00
1948 -26.00 -26.00 -10.00 11.00 20.00 35.00 38.00 33.00 22.00 a 12.00 -3.00 -24.00 -26.00
1949 -30.00 -27.00 a -5.00 8.00 a 25.00 26.00 a 33.00 34.00 a 27.00 11.00 21.00 -12.00 -30.00
1950 -24.00 -10.00 -17.00 8.00 6.00 27.00 35.00 36.00 21.00 12.00 -3.00 -7.00 -24.00
1951 -36.00 -26.00 a -12.00 12.00 e 26.00 24.00 32.00 33.00 19.00 10.00 -4.00 -14.00 -36.00
1952 -19.00 -12.00 -14.00 12.00 18.00 27.00 a 31.00 36.00 24.00 18.00 -15.00 -6.00 -19.00
1953 0.00 -11.00 -7.00 5.00 16.00 32.00 a ----- z 37.00 29.00 14.00 3.00 -6.00 a -11.00
1954 -18.00 3.00 -10.00 17.00 9.00 26.00 e 28.00 a 27.00 24.00 15.00 -8.00 -15.00 -18.00
1955 -9.00 -21.00 -17.00 9.00 26.00 31.00 31.00 36.00 22.00 12.00 -21.00 -17.00 -21.00
1956 -19.00 -27.00 a -25.00 5.00 24.00 31.00 34.00 26.00 25.00 8.00 -9.00 -17.00 -27.00
1957 -25.00 -8.00 -2.00 14.00 26.00 33.00 33.00 36.00 24.00 19.00 -7.00 0.00 -25.00
1958 -2.00 6.00 1.00 11.00 28.00 a 35.00 33.00 33.00 26.00 16.00 -3.00 -1.00 -3.00
1959 -29.00 -9.00 -5.00 5.00 24.00 a 32.00 32.00 31.00 15.00 15.00 -27.00 -5.00 -29.00
1960 -15.00 -21.00 -23.00 6.00 21.00 27.00 37.00 29.00 28.00 11.00 a -3.00 -11.00 -23.00
1961 -17.00 b 0.00 0.00 c 11.00 d 24.00 37.00 38.00 42.00 17.00 7.00 -5.00 a -22.00 a -22.00
1962 -30.00 a -29.00 -9.00 14.00 28.00 b 26.00 35.00 29.00 20.00 22.00 10.00 -20.00 d -30.00
1963 -36.00 b -2.00 -3.00 11.00 29.00 a 33.00 b 35.00 a 38.00 a 35.00 a 14.00 11.00 b -13.00 a -36.00
1964 -8.00 a -12.00 a -10.00 3.00 25.00 32.00 b 36.00 a 31.00 d 23.00 d 11.00 -6.00 -34.00 c -34.00
1965 0.00 c -16.00 a -24.00 g 15.00 d 21.00 a 31.00 34.00 28.00 12.00 f 19.00 a 6.00 -5.00 b -24.00
1966 -20.00 b -13.00 c -17.00 3.00 b 15.00 f 21.00 c 39.00 b 29.00 a ----- z ----- z ----- z ----- z -20.00
1967 ----- z -6.00 j -15.00 c 10.00 f 11.00 31.00 40.00 36.00 31.00 18.00 b -1.00 a -18.00 a -18.00
1968 -18.00 -3.00 5.00 a 10.00 c 14.00 24.00 25.00 a 24.00 28.00 16.00 0.00 -12.00 -18.00
1969 -16.00 3.00 a -6.00 12.00 21.00 24.00 35.00 36.00 a 30.00 6.00 5.00 -7.00 e -16.00
1970 -21.00 7.00 c -20.00 4.00 17.00 32.00 39.00 41.00 21.00 a 11.00 -1.00 0.00 c -21.00
1971 -18.00 -11.00 -10.00 d 10.00 c ----- z 33.00 36.00 35.00 23.00 b 1.00 a 2.00 a -16.00 -18.00
1972 -25.00 -22.00 6.00 12.00 18.00 37.00 34.00 41.00 22.00 a 5.00 d -3.00 -27.00 -27.00
1973 -22.00 -8.00 11.00 6.00 21.00 27.00 39.00 39.00 25.00 14.00 ----- z -6.00 e -22.00
1974 -18.00 3.00 a -5.00 a 10.00 23.00 30.00 37.00 31.00 13.00 17.00 5.00 -10.00 f -18.00
1975 -18.00 b -12.00 a -1.00 3.00 19.00 29.00 44.00 33.00 25.00 13.00 -10.00 -7.00 -18.00
1976 -6.00 -17.00 -10.00 13.00 9.00 21.00 c 21.00 30.00 22.00 f 17.00 -3.00 a 5.00 -17.00
1977 -14.00 3.00 d 2.00 d 9.00 d ----- z ----- z ----- z ----- z ----- z 18.00 k ----- z -2.00 f -14.00
1978 ----- z ----- z ----- z 22.00 c 21.00 j 30.00 36.00 35.00 22.00 12.00 j -6.00 f -31.00 i -31.00
1979 -23.00 b -11.00 0.00 4.00 24.00 a 25.00 a 42.00 41.00 29.00 c 9.00 c -5.00 a -3.00 -23.00
1980 -28.00 a -8.00 a 0.00 g 12.00 c 30.00 f 35.00 a 39.00 a 36.00 a 28.00 c 11.00 e 1.00 b 2.00 -28.00
1981 8.00 -29.00 c 12.00 c 13.00 d 26.00 f 30.00 e ----- z ----- z ----- z 16.00 l 7.00 i -1.00 i -29.00
1982 -13.00 -27.00 4.00 1.00 18.00 l 29.00 41.00 42.00 27.00 o ----- z -6.00 -8.00 -27.00
1983 3.00 -2.00 0.00 5.00 18.00 34.00 35.00 ----- z 22.00 f ----- z -7.00 -29.00 -29.00
1984 -20.00 6.00 1.00 9.00 a 16.00 29.00 42.00 40.00 ----- z ----- z 5.00 ----- z -20.00
1985 -19.00 -25.00 -5.00 15.00 24.00 i 33.00 a 40.00 ----- z 9.00 8.00 -13.00 -16.00 -25.00
1986 4.00 -16.00 17.00 13.00 26.00 37.00 33.00 38.00 26.00 12.00 -13.00 1.00 -16.00
1987 -16.00 -2.00 -9.00 16.00 25.00 29.00 36.00 33.00 27.00 18.00 8.00 -11.00 -16.00
1988 -15.00 -11.00 0.00 12.00 23.00 35.00 36.00 37.00 28.00 22.00 4.00 -5.00 -15.00
1989 -8.00 -35.00 -14.00 9.00 22.00 34.00 43.00 34.00 23.00 21.00 2.00 -13.00 -35.00
1990 -4.00 -17.00 -4.00 16.00 19.00 32.00 41.00 41.00 33.00 18.00 3.00 -35.00 -35.00
1991 -20.00 9.00 3.00 20.00 20.00 35.00 39.00 42.00 28.00 -8.00 -11.00 -9.00 -20.00
1992 -4.00 9.00 12.00 16.00 27.00 35.00 40.00 29.00 26.00 18.00 -4.00 -15.00 -15.00
1993 -9.00 -16.00 -6.00 18.00 28.00 32.00 35.00 31.00 24.00 7.00 -17.00 2.00 -17.00
1994 -2.00 -15.00 9.00 12.00 31.00 32.00 34.00 40.00 29.00 18.00 -1.00 -6.00 -15.00
1995 -14.00 -15.00 -2.00 15.00 16.00 31.00 37.00 39.00 19.00 12.00 1.00 -7.00 -15.00
1996 -16.00 -30.00 -7.00 18.00 22.00 32.00 43.00 34.00 22.00 6.00 3.00 -10.00 -30.00
1997 -30.00 -5.00 0.00 1.00 26.00 34.00 38.00 39.00 29.00 14.00 0.00 -6.00 -30.00
1998 -9.00 -2.00 -2.00 12.00 29.00 26.00 45.00 41.00 32.00 21.00 9.00 -26.00 -26.00
1999 -2.00 2.00 -2.00 6.00 19.00 30.00 33.00 42.00 20.00 16.00 8.00 4.00 -2.00
2000 -3.00 4.00 -4.00 11.00 26.00 29.00 42.00 39.00 17.00 15.00 -4.00 -13.00 -13.00
2001 -4.00 a -18.00 -1.00 13.00 22.00 30.00 39.00 28.00 a 32.00 14.00 a 9.00 -9.00 -18.00
2002 -14.00 -15.00 -20.00 6.00 17.00 30.00 37.00 31.00 26.00 0.00 -3.00 -4.00 -20.00
2003 -3.00 -24.00 2.00 9.00 15.00 30.00 43.00 36.00 27.00 5.00 ----- z 2.00 -24.00
2004 -23.00 -7.00 8.00 14.00 19.00 31.00 39.00 36.00 28.00 18.00 -4.00 -11.00 -23.00
2005 -7.00 -4.00 9.00 13.00 19.00 32.00 42.00 33.00 33.00 25.00 2.00 -18.00 -18.00
2006 8.00 ----- z -1.00 15.00 22.00 38.00 45.00 34.00 31.00 5.00 -4.00 -7.00 -7.00
2007 -25.00 -12.00 0.00 14.00 24.00 34.00 i 46.00 38.00 30.00 22.00 1.00 -4.00 -25.00
2008 -17.00 6.00 2.00 -4.00 27.00 j 30.00 36.00 37.00 29.00 14.00 13.00 -18.00 -18.00
2009 -14.00 -1.00 -7.00 2.00 22.00 31.00 37.00 34.00 31.00 4.00 8.00 -15.00 a -15.00
2010 -16.00 -3.00 10.00 10.00 15.00 34.00 37.00 e 37.00 32.00 26.00 -12.00 -10.00 -16.00
2011 -10.00 -18.00 12.00 15.00 24.00 33.00 45.00 44.00 31.00 14.00 2.00 -11.00 -18.00
2012 0.00 3.00 0.00 21.00 22.00 32.00 45.00 38.00 31.00 14.00 2.00 -6.00 -6.00
2013 -10.00 -3.00 -4.00 a ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z -10.00
Period of Record Statistics
MEAN -14.59 -11.38 -4.71 10.65 21.20 30.37 36.82 35.23 24.66 13.93 -1.87 -10.49 -20.94
S.D. 10.07 11.21 9.37 5.72 5.16 3.78 4.71 4.54 6.02 6.28 8.72 8.80 7.56
SKEW 0.14 -0.09 -0.08 -0.19 -0.59 -0.54 -0.26 0.08 -1.17 -0.57 -0.45 -0.45 0.27
MAX 8.00 9.00 17.00 23.00 31.00 38.00 47.00 49.00 36.00 26.00 21.00 10.00 -2.00
MIN -36.00 -35.00 -25.00 -4.00 6.00 20.00 21.00 24.00 0.00 -8.00 -27.00 -35.00 -35.00
NO YRS 78 79 79 79 71 79 79 78 74 74 76 76 48