YELLOWSTONE PARK, WYOMING

Monthly Average 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 9.52 1.32 18.84 ----- z ----- z ----- z 54.35 55.16 46.70 34.88 o 27.50 12.00 28.17
1895 10.39 9.29 13.90 29.50 33.94 37.33 43.87 44.29 35.00 28.26 18.70 12.52 26.42
1896 16.39 16.34 15.71 24.20 32.52 41.27 47.61 43.84 36.63 c 27.39 10.90 20.32 27.76
1897 ----- z 11.79 10.58 27.57 39.13 41.40 45.68 46.39 40.60 30.65 22.13 12.06 29.82
1898 6.32 15.93 10.52 28.63 34.35 41.73 46.00 46.81 36.70 26.23 16.23 8.52 26.50
1899 12.55 1.36 13.32 25.20 32.00 40.20 45.42 42.03 37.47 27.81 26.80 12.97 26.43
1900 16.45 9.68 22.94 31.50 37.32 46.87 44.55 44.61 36.17 31.52 18.47 17.29 29.78
1901 13.65 7.89 17.23 24.37 38.97 37.70 49.61 47.61 35.00 a 32.65 24.44 e 14.76 b 28.66
1902 8.84 17.57 15.61 25.60 35.68 40.23 43.45 41.90 36.13 31.90 21.07 14.55 27.71
1903 14.32 1.46 18.10 25.77 32.90 42.60 44.45 43.90 35.13 31.19 21.90 16.29 27.34
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 42.70 48.00 47.32 35.00 28.58 21.80 16.70 a 34.30
1942 8.42 6.21 14.87 30.37 31.61 36.53 45.84 44.55 36.37 28.26 18.47 16.37 a 26.49
1943 ----- z 11.21 9.84 31.27 31.84 38.37 44.23 43.55 36.97 32.16 23.10 13.42 28.72
1944 10.10 12.62 13.00 27.87 35.16 38.97 42.90 41.55 36.07 30.74 20.20 10.00 26.60
1945 14.42 13.54 18.55 22.00 32.03 36.50 45.26 44.97 36.27 31.67 a 20.70 12.06 27.33
1946 10.81 12.86 21.55 28.50 31.58 40.43 45.77 42.97 35.23 26.55 18.73 17.39 27.70
1947 6.48 11.07 16.77 24.00 33.65 38.13 45.58 42.74 36.90 33.16 12.90 a 11.97 26.11
1948 6.48 7.07 10.16 25.43 31.97 41.90 43.00 42.52 35.90 a 26.35 14.07 4.23 24.09
1949 -7.03 7.15 a 15.13 26.66 a 36.00 39.34 a 45.29 46.63 a 36.70 26.13 27.70 12.97 26.06
1950 3.23 17.79 14.23 23.23 26.87 38.87 43.35 42.29 36.37 34.13 21.87 20.06 26.86
1951 6.77 15.15 a 11.61 24.00 e 34.65 35.17 45.42 44.16 34.43 28.32 17.87 8.16 25.48
1952 10.77 11.34 11.65 26.20 31.97 38.52 a 43.87 44.87 37.80 29.55 13.90 15.29 26.31
1953 22.61 13.82 19.61 22.67 30.19 39.55 a ----- z 45.13 38.77 31.16 27.00 12.53 a 27.55
1954 11.90 18.61 13.29 27.80 33.74 37.48 e 46.63 a 42.48 36.67 26.65 24.80 11.23 27.61
1955 6.65 5.75 8.00 24.43 33.03 38.57 46.55 46.74 36.57 29.39 13.23 12.74 25.14
1956 13.26 4.93 a 15.32 24.90 35.90 41.27 45.74 41.23 36.20 29.58 12.53 13.45 26.19
1957 -0.58 15.89 17.71 25.00 37.10 40.90 46.23 44.10 35.33 28.97 15.33 17.84 26.98
1958 12.77 21.14 16.48 25.53 38.17 a 41.23 44.03 44.81 37.63 29.16 19.33 17.35 28.97
1959 12.29 8.32 16.26 24.50 29.77 a 41.33 42.77 41.45 34.73 27.10 13.70 11.81 25.34
1960 10.19 5.10 16.68 23.53 31.61 39.07 46.19 43.16 37.57 30.03 a 20.57 12.74 26.37
1961 12.14 b 21.86 20.75 c 23.65 d 34.39 43.37 46.45 47.26 33.40 27.29 18.34 a 10.10 a 28.25
1962 1.23 a 13.21 15.00 27.87 36.31 b 41.20 43.94 42.84 35.17 31.16 24.10 16.15 d 27.35
1963 -2.07 b 19.86 18.52 25.87 35.30 a 40.89 b 45.73 a 44.20 a 43.38 a 34.45 24.71 b 11.53 a 28.53
1964 11.37 a 8.75 a 13.10 27.20 37.55 41.04 b 46.20 a 40.81 d 32.73 d 27.58 16.93 8.39 c 25.97
1965 13.11 c 11.00 a -0.79 g 26.35 d 30.57 a 39.10 43.16 44.71 30.38 f 30.20 a 23.83 14.24 b 27.63
1966 9.86 b 7.28 c 15.48 20.79 b 30.56 f 38.04 c 45.86 b 41.70 a ----- z ----- z ----- z ----- z 25.57
1967 ----- z 12.83 j 18.32 c 21.96 f 31.68 39.27 47.81 44.90 41.37 31.93 b 20.97 a 6.40 a 31.40
1968 10.00 17.10 22.07 a 22.56 c 32.48 41.40 45.97 a 42.58 38.13 31.87 20.17 12.29 28.05
1969 11.74 15.33 a 11.71 26.93 34.26 40.33 46.71 48.57 a 41.00 24.97 20.57 14.50 e 28.05
1970 11.39 18.00 c 7.16 20.20 34.77 43.40 49.39 48.19 34.72 a 25.45 20.27 12.96 c 27.16
1971 12.81 13.07 13.93 d 25.07 c ----- z 42.43 44.48 50.23 35.50 b 28.50 a 19.17 a 8.26 26.68
1972 8.55 14.93 24.52 28.10 34.84 44.10 44.90 47.87 36.97 a 29.33 d 21.70 6.48 28.52
1973 9.65 14.50 20.10 23.70 33.19 42.27 47.32 47.90 37.47 31.48 ----- z 13.19 e 29.16
1974 8.90 14.96 a 18.70 a 27.50 32.65 43.60 48.68 42.94 32.83 30.65 21.03 10.68 f 29.31
1975 7.90 b 7.85 a 13.81 18.93 32.42 39.13 50.68 44.00 35.47 32.32 17.37 18.68 26.55
1976 14.19 15.76 13.19 28.50 34.39 37.59 c 47.39 40.58 35.75 f 26.94 24.38 a 13.26 26.92
1977 6.39 14.62 d 15.96 d 26.00 d ----- z ----- z ----- z ----- z ----- z 31.10 k ----- z 15.04 f 15.74
1978 ----- z ----- z ----- z 29.89 c 34.19 j 40.03 47.06 44.94 39.97 30.62 j 11.92 f -4.82 i 40.38
1979 -3.17 b 13.04 16.90 27.23 33.97 a 40.86 a 47.90 47.10 40.00 c 31.46 c 11.97 a 16.00 26.94
1980 4.03 a 15.29 a 15.79 g 28.00 c 37.88 f 42.17 a 48.40 a 43.17 a 39.67 c 28.46 e 20.61 b 19.84 28.96
1981 17.81 12.44 c 22.50 c 29.00 d 37.56 f 41.44 e ----- z ----- z ----- z 26.68 l 25.33 i 13.41 i 24.64
1982 5.94 9.50 20.16 20.97 31.79 l 40.57 49.29 49.26 38.07 o ----- z 16.23 13.16 25.01
1983 17.97 18.89 23.42 24.73 32.16 41.60 47.16 ----- z 37.92 f ----- z 23.30 2.97 25.80
1984 11.06 13.83 22.55 26.00 a 34.81 40.60 49.71 49.42 ----- z ----- z 21.00 ----- z 29.89
1985 6.29 3.86 15.61 29.60 37.23 i 43.10 a 49.97 ----- z 35.80 27.77 11.00 10.03 23.30
1986 17.42 18.43 29.00 29.53 34.03 46.17 46.26 46.65 36.10 29.03 18.27 11.10 30.16
1987 9.32 15.93 20.52 29.47 37.26 43.10 46.81 44.10 37.73 28.65 22.70 10.61 28.85
1988 6.52 11.38 17.29 28.73 36.55 48.47 49.06 45.77 37.97 33.48 20.80 10.13 28.85
1989 10.77 0.86 18.29 26.97 35.03 42.13 51.55 46.42 37.03 31.48 22.63 10.13 27.78
1990 15.39 10.50 20.74 29.30 34.35 42.80 48.39 48.03 42.13 29.32 22.73 -0.39 28.61
1991 10.00 21.21 20.13 27.67 34.84 42.77 48.39 49.71 39.07 26.00 16.03 13.48 29.11
1992 13.23 21.00 26.13 31.07 38.35 43.57 44.58 44.61 37.70 32.32 17.07 7.48 29.76
1993 8.19 5.29 22.13 28.27 37.13 40.47 41.71 43.23 35.17 28.71 12.40 13.81 26.37
1994 19.35 8.32 21.97 27.03 39.16 43.13 46.39 48.58 40.03 30.42 11.90 16.71 29.42
1995 12.58 18.14 19.29 27.03 32.42 41.00 48.35 47.00 38.53 26.55 23.00 14.35 29.02
1996 7.32 10.28 15.58 27.60 33.06 43.33 49.35 46.94 36.23 27.74 20.87 14.26 27.71
1997 8.39 11.64 20.16 20.90 35.32 42.50 46.90 45.74 39.97 29.45 17.83 9.94 27.40
1998 15.81 16.18 18.42 26.73 34.65 37.27 50.19 48.58 43.27 28.58 24.73 10.19 29.55
1999 16.00 14.64 17.19 21.40 32.45 40.67 45.84 47.55 34.03 30.06 27.17 15.13 28.51
2000 13.55 18.31 19.35 26.87 35.13 41.90 47.58 49.10 37.13 30.19 9.33 9.03 28.12
2001 7.73 a 7.21 19.29 26.20 35.26 42.83 49.35 46.00 a 42.00 29.20 a 24.70 9.32 28.26
2002 8.84 7.46 7.94 23.23 31.00 42.27 49.00 41.00 38.50 22.65 16.50 15.65 25.34
2003 17.10 7.29 19.23 27.87 34.71 40.87 50.58 50.39 35.23 29.90 ----- z 13.42 29.69
2004 9.74 10.76 23.32 27.13 32.87 39.87 46.23 43.29 36.33 32.68 21.80 19.06 28.59
2005 15.23 13.39 20.52 28.17 35.68 41.90 51.45 46.90 40.07 33.90 21.37 11.74 30.03
2006 18.58 ----- z 20.77 31.03 36.03 44.87 52.42 45.81 39.10 28.52 23.20 14.29 32.24
2007 6.26 17.71 26.32 29.23 36.42 44.24 i 55.19 48.26 40.37 30.68 22.17 12.03 29.51
2008 8.35 15.31 15.42 19.23 37.19 j 41.27 48.55 48.55 36.87 31.03 27.10 8.58 27.30
2009 11.42 15.79 16.19 26.97 35.55 42.57 46.74 47.26 41.37 23.35 22.90 6.87 a 28.08
2010 14.10 15.18 21.84 25.60 31.42 42.40 47.19 e 47.52 40.50 35.00 16.80 15.84 29.45
2011 13.03 5.57 21.81 24.63 33.94 41.07 49.58 48.61 41.10 34.39 18.20 11.23 28.60
2012 16.42 12.93 25.45 30.87 34.23 42.20 51.61 48.52 41.07 28.45 25.03 15.68 31.04
2013 9.87 14.57 17.67 a ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 14.04
Period of Record Statistics
MEAN 10.46 12.31 17.50 26.25 34.17 41.05 47.03 45.53 37.58 29.58 19.88 12.60 27.66
S.D. 5.12 5.08 4.48 2.88 2.37 2.33 2.65 2.78 2.66 2.58 4.43 3.89 1.44
SKEW -0.71 -0.33 -0.05 -0.46 -0.10 0.18 0.61 0.42 0.81 -0.16 -0.39 -0.53 -0.06
MAX 22.61 21.86 29.00 31.50 39.16 48.47 55.19 55.16 46.70 35.00 27.70 20.32 31.04
MIN -7.03 0.86 7.16 18.93 26.87 35.17 41.71 40.58 32.73 22.65 9.33 -0.39 24.09
NO YRS 78 79 79 79 71 79 79 78 74 74 76 76 58