BOULDER, COLORADO

Monthly Average Temperature (Degrees Fahrenheit)

(050848)

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
1893 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 51.53 39.47 38.35 a 43.12
1894 33.29 l 26.11 j 41.74 50.86 a ----- z ----- z 69.05 c 67.44 ----- z ----- z ----- z 31.48 52.12
1895 26.48 d 24.75 b 35.40 b 51.45 56.59 b 61.10 64.45 u ----- z ----- z ----- z ----- z ----- z 42.63
1896 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1897 ----- z ----- z ----- z ----- z 60.26 64.65 70.56 69.06 66.78 52.24 41.87 30.40 56.98
1898 30.68 38.84 35.73 49.20 51.94 66.65 72.11 73.00 62.10 49.03 36.65 29.31 49.60
1899 31.55 18.02 34.42 49.07 57.06 65.90 69.05 70.37 65.80 50.52 47.68 35.87 49.61
1900 37.00 31.57 43.11 45.83 59.82 69.52 70.73 72.26 61.57 57.19 44.47 38.89 52.66
1901 36.39 29.38 39.95 47.10 a 59.48 65.93 75.26 71.32 61.72 53.92 47.78 a 34.95 51.93
1902 32.29 38.02 39.10 48.78 59.10 66.82 69.72 a 71.84 60.88 55.02 a 42.14 a 36.35 51.67
1903 36.87 d 22.88 36.93 b 48.43 a 54.92 a 60.71 b 71.05 70.58 60.95 54.50 42.80 39.77 50.03
1904 31.90 a 41.91 a 43.40 49.35 55.42 61.22 67.84 70.21 64.22 54.84 48.45 37.34 52.17
1905 29.55 c 26.95 44.50 46.40 52.98 65.95 67.94 72.42 66.02 48.44 43.67 a 35.94 d 50.06
1906 39.05 37.46 29.77 50.30 57.45 62.38 67.05 69.02 a 62.12 51.84 38.57 41.29 50.52
1907 34.24 42.80 48.02 46.85 50.71 63.50 70.29 70.56 63.85 54.18 40.93 c 37.29 g 53.27
1908 37.39 38.02 45.81 52.83 54.77 64.02 69.50 67.79 66.10 48.95 39.97 34.26 51.62
1909 37.47 35.05 33.74 41.93 53.90 64.82 71.16 72.35 62.13 53.89 43.77 19.90 49.18
1910 30.68 30.16 54.47 54.93 55.74 66.85 ----- z ----- z 63.14 a 54.48 45.82 35.45 a 49.17
1911 38.53 30.84 45.65 49.40 58.08 68.90 68.77 69.19 64.40 47.66 36.97 ----- z 52.58
1912 ----- z ----- z 32.24 h 46.73 56.98 e 62.24 c 68.29 69.55 55.40 49.97 43.53 a 31.73 53.82
1913 30.52 24.11 35.94 49.25 56.29 65.38 69.68 71.63 a 59.92 48.08 45.47 26.81 48.59
1914 37.42 a 32.22 a 43.28 f 48.10 a 57.34 68.48 71.00 70.27 a 65.78 54.32 47.60 24.52 52.46
1915 30.18 36.30 32.74 52.05 54.35 62.97 68.18 65.24 61.57 a 54.98 44.27 32.57 b 49.62
1916 25.40 36.97 48.66 50.88 59.27 a 69.27 76.52 69.23 63.50 50.31 40.15 d 26.53 51.39
1917 29.48 34.52 32.65 a 45.33 50.55 68.32 76.77 71.34 65.20 50.27 47.92 39.06 50.95
1918 26.87 37.61 47.89 44.27 61.45 71.03 74.68 75.45 61.45 54.75 a 37.75 32.69 52.16
1919 36.37 31.28 c 40.63 50.28 58.44 68.55 76.90 76.42 68.35 51.91 i 35.72 j 37.08 l 56.36
1920 35.50 33.67 39.02 39.67 55.61 63.59 c 70.69 67.75 a 61.94 c 52.36 b 36.03 a 33.00 b 49.07
1921 34.31 37.39 45.53 46.05 a 56.62 b 66.15 71.58 70.44 64.31 a 57.18 44.31 a 36.00 52.49
1922 26.34 30.50 c 40.56 45.68 57.58 70.42 71.98 72.65 a 66.76 c 52.26 37.72 36.08 50.71
1923 38.19 28.85 a 33.65 47.20 55.35 63.85 70.37 66.87 a 60.25 43.55 41.77 32.29 48.52
1924 29.74 40.91 29.39 47.88 54.13 68.48 72.00 74.02 57.35 52.03 43.87 24.74 49.55
1925 30.48 41.05 44.13 51.48 58.69 65.88 73.45 a 68.31 63.23 41.48 40.20 32.53 50.91
1926 31.34 39.04 37.76 46.50 57.79 65.45 70.27 71.11 60.97 55.18 43.05 30.73 50.76
1927 36.31 38.48 37.16 49.30 59.23 63.48 69.34 65.40 60.95 54.37 45.36 a 27.12 a 50.54
1928 36.29 32.67 39.69 45.93 56.84 60.47 69.15 69.02 62.92 51.68 38.25 31.55 49.54
1929 26.50 23.27 40.15 47.02 55.66 67.35 73.65 72.29 58.68 52.56 32.63 37.53 48.94
1930 16.40 41.73 37.68 55.60 55.42 69.22 73.06 69.56 62.98 49.94 41.45 32.45 50.46
1931 35.34 38.46 37.21 48.15 55.52 70.23 74.65 a 71.68 66.63 54.24 38.12 34.69 52.08
1932 27.48 39.60 32.68 a 50.57 59.16 64.82 72.85 71.27 63.28 49.63 43.28 a 22.95 49.80
1933 36.29 29.07 43.58 46.25 54.84 71.75 75.46 c 69.45 67.00 58.07 a 46.47 43.92 53.51
1934 38.97 37.45 45.47 51.33 64.19 70.10 76.48 72.71 60.57 57.10 44.37 36.79 54.63
1935 38.71 38.02 42.94 45.70 49.42 61.91 s 73.26 71.31 63.22 51.27 36.65 33.77 49.48
1936 32.10 26.31 41.82 50.07 59.85 69.13 75.19 72.05 63.57 49.13 ----- z 35.19 52.22
1937 18.03 32.68 37.89 47.83 58.16 63.55 72.39 73.89 64.95 53.15 40.35 32.58 49.62
1938 33.74 35.66 41.65 48.50 53.44 65.73 71.31 72.53 64.40 53.89 35.55 32.26 50.72
1939 34.55 25.88 41.39 48.70 59.52 66.32 73.50 68.60 63.47 51.39 41.40 39.26 51.16
1940 23.44 34.45 42.60 45.50 57.89 68.27 71.53 68.18 61.17 52.84 34.70 32.13 49.39
1941 32.52 34.41 a 34.27 a 42.65 57.69 62.13 69.26 67.17 a 57.22 47.63 42.15 33.92 48.42
1942 28.50 23.86 35.92 49.15 54.39 64.17 a 72.24 69.74 59.97 49.58 42.68 36.98 48.93
1943 33.77 39.71 35.56 54.32 52.58 65.33 73.63 72.94 61.40 52.73 41.90 34.02 51.49
1944 31.73 31.78 33.18 42.10 56.71 64.10 68.94 70.61 61.47 53.32 41.65 32.55 49.01
1945 33.53 33.38 40.58 41.32 55.94 60.28 70.77 70.47 58.85 54.39 42.77 31.24 49.46
1946 32.94 37.36 45.32 54.98 51.21 67.48 71.60 70.57 d 61.90 47.85 36.92 38.66 51.40
1947 32.40 b 31.27 36.48 46.47 55.10 62.48 76.60 g 75.92 69.35 57.60 34.93 37.05 49.00
1948 31.56 31.14 35.27 53.23 59.87 68.20 75.27 a 75.05 ----- z ----- z ----- z 26.28 v 53.70
1949 21.89 34.05 42.11 53.28 60.43 a 67.67 74.95 73.69 66.45 51.29 53.07 37.00 52.99
1950 32.94 42.14 41.19 49.80 55.47 69.23 71.39 71.92 61.95 61.94 42.48 40.19 53.39
1951 31.50 37.91 37.42 46.67 59.34 62.35 74.92 71.97 63.47 51.60 40.62 31.74 50.79
1952 35.92 38.09 36.24 50.93 58.66 74.63 75.87 72.45 a 68.55 57.24 37.17 36.40 53.51
1953 43.47 36.79 46.13 45.20 55.27 71.82 75.74 73.60 69.75 57.56 46.12 35.47 54.74
1954 39.76 47.59 37.18 55.83 58.26 71.52 78.29 74.97 67.98 53.68 c 47.52 39.69 56.02
1955 30.98 29.86 38.35 52.77 60.77 a 65.07 76.58 74.94 66.57 56.95 38.88 36.92 52.39
1956 37.32 30.84 42.73 49.18 62.02 74.95 74.16 72.00 69.32 58.42 41.28 39.77 54.33
1957 27.60 42.09 40.68 43.63 55.02 67.87 75.79 73.60 63.37 53.53 40.23 44.10 52.29
1958 36.98 39.68 33.45 46.35 64.31 70.22 71.65 74.79 65.80 56.21 42.53 37.31 53.27
1959 32.55 31.61 40.44 46.92 57.02 70.62 71.82 73.00 60.38 49.61 40.57 39.02 51.13
1960 31.29 28.38 40.26 52.25 59.53 71.02 74.55 73.85 66.33 54.50 43.82 35.45 52.60
1961 36.89 39.91 39.98 48.17 58.84 67.67 72.90 72.55 57.43 52.79 37.92 30.27 51.28
1962 25.26 34.70 37.08 52.75 61.50 66.48 72.03 73.05 63.53 57.52 45.82 37.84 52.30
1963 23.42 40.86 41.13 51.82 62.44 69.90 76.98 a 70.95 68.30 60.08 44.08 33.27 53.60
1964 35.42 31.98 36.21 48.72 61.03 66.42 76.98 71.44 64.37 55.76 41.82 36.32 52.21
1965 38.35 32.70 30.79 52.00 58.48 66.45 72.98 70.73 55.88 57.85 45.72 38.50 51.70
1966 31.40 31.27 46.26 48.50 63.44 67.48 77.61 71.53 64.45 53.55 43.12 34.10 52.73
1967 36.56 37.89 46.39 50.92 55.42 62.20 72.97 70.58 63.82 55.53 41.45 28.16 51.82
1968 33.65 36.57 44.53 45.75 55.60 69.63 72.56 69.98 63.23 55.19 38.45 32.66 51.48
1969 36.24 36.62 34.69 53.90 61.29 62.22 75.29 74.32 66.17 41.77 41.75 36.34 51.72
1970 33.87 40.89 36.74 45.08 60.85 65.95 73.32 73.47 60.85 47.60 41.55 35.63 51.32
1971 34.77 32.84 40.21 47.88 54.48 69.05 71.50 72.15 58.92 50.71 41.17 32.82 50.54
1972 32.61 40.17 47.48 49.57 56.85 68.07 69.87 69.00 62.00 51.53 33.92 27.89 50.75
1973 29.16 34.79 38.87 43.10 55.84 67.83 69.94 72.69 59.33 54.85 39.53 35.21 50.10
1974 28.61 37.32 43.92 47.62 61.23 68.00 73.26 68.65 60.18 54.21 39.85 32.69 51.29
1975 33.00 32.80 39.23 44.62 54.79 64.23 72.13 71.18 60.73 55.05 39.25 38.03 50.42
1976 32.47 41.38 38.44 49.20 56.39 66.23 73.16 69.71 60.75 49.40 39.33 36.60 51.09
1977 28.11 38.95 39.47 49.48 59.55 71.18 73.65 68.61 65.53 53.79 41.55 38.03 52.33
1978 27.16 29.75 43.27 49.20 56.23 a 66.20 73.68 69.47 64.95 54.03 40.18 ----- z 52.19
1979 22.61 35.86 c 42.55 50.02 ----- z ----- z 73.13 67.97 a ----- z 56.12 a 35.07 38.92 46.92
1980 29.45 36.48 38.87 47.67 55.56 71.70 ----- z 71.92 65.68 52.53 43.80 44.06 50.70
1981 38.92 39.27 42.16 56.67 55.08 69.05 71.63 68.73 64.48 50.66 45.97 a 36.85 53.29
1982 33.71 35.45 43.85 50.10 55.89 62.25 71.77 72.65 61.42 50.42 ----- z 35.44 52.09
1983 ----- z 41.44 k 38.65 43.43 53.10 62.55 72.44 74.71 65.38 53.62 a 40.53 20.66 52.51
1984 29.79 35.78 40.10 43.75 60.35 65.52 73.50 71.47 60.93 45.73 a 40.82 33.90 50.14
1985 26.73 29.50 41.56 51.92 59.73 68.58 72.16 72.22 a 58.34 b 51.77 a 31.10 31.79 49.62
1986 41.88 b 37.54 48.73 50.65 56.89 69.22 71.60 70.68 59.28 50.24 40.63 33.50 52.57
1987 34.24 36.96 39.77 52.50 58.97 68.58 72.74 68.95 61.67 52.77 40.98 30.81 51.58
1988 28.92 35.74 40.85 51.55 59.24 70.92 72.76 71.84 62.27 54.74 41.58 32.74 51.93
1989 36.45 24.05 44.89 51.23 59.19 64.25 73.21 ----- z ----- z ----- z ----- z ----- z 50.47
1990 ----- z ----- z ----- z 47.98 54.47 69.95 68.63 68.77 64.70 53.69 45.15 27.42 55.64
1991 29.90 40.86 42.76 47.75 58.23 66.57 70.47 69.16 61.65 52.06 36.77 35.34 50.96
1992 35.90 40.59 43.31 54.23 59.06 62.90 68.31 66.29 64.42 54.02 34.10 29.18 51.03
1993 28.34 30.59 42.34 47.57 57.48 64.50 69.47 ----- z 58.72 48.63 35.62 35.39 47.15
1994 35.52 31.91 43.82 47.62 60.81 69.78 70.97 70.85 64.50 50.68 a 36.70 36.08 51.60
1995 34.13 38.39 42.11 45.12 50.85 62.33 70.48 73.97 60.38 51.50 44.90 36.24 50.87
1996 29.71 37.67 37.97 50.42 58.84 66.93 71.45 69.48 60.77 53.02 40.58 36.47 51.11
1997 31.24 32.70 45.52 42.82 57.44 66.45 71.40 68.69 64.02 52.66 ----- z ----- z 53.29
1998 36.50 36.39 38.65 46.50 58.76 62.68 72.76 ----- z 67.03 50.32 ----- z ----- z 52.18
1999 ----- z ----- z ----- z ----- z 55.58 64.78 73.34 69.31 58.48 51.40 a 47.88 a 36.92 57.21
2000 36.31 41.07 42.85 51.05 b 61.26 67.31 a 74.35 73.03 63.18 49.39 31.32 31.23 51.86
2001 32.94 32.32 40.76 50.68 58.40 68.52 75.00 71.85 65.00 53.84 43.85 34.98 52.35
2002 33.11 35.98 37.53 52.87 56.16 70.52 76.81 71.31 64.07 45.92 40.27 36.58 51.76
2003 40.21 31.59 43.66 50.60 57.35 62.83 75.82 72.87 60.50 57.39 38.92 36.35 52.34
2004 35.40 33.64 48.15 49.18 59.97 62.70 69.16 66.40 62.85 51.85 39.67 36.45 51.29
2005 35.44 37.88 41.97 48.40 57.63 65.42 75.05 69.71 66.18 53.10 44.93 33.37 52.42
2006 40.66 33.68 39.39 53.88 60.95 71.57 74.37 71.56 58.40 50.98 43.37 35.31 52.84
2007 27.23 34.59 47.56 47.82 58.00 67.65 74.76 73.56 64.43 55.19 44.87 30.06 52.14
2008 31.63 36.10 40.95 47.80 57.03 66.02 75.02 69.63 60.90 51.81 46.03 31.10 51.17
2009 38.16 39.66 44.21 47.30 ----- z 62.93 69.53 69.48 63.10 44.47 43.77 26.66 49.93
2010 33.02 30.21 42.68 48.75 53.90 66.93 72.45 72.42 66.55 54.92 39.77 37.19 51.57
2011 33.05 31.93 45.21 48.86 a 53.66 67.57 73.50 75.13 63.32 52.89 42.32 32.13 51.63
2012 38.84 32.21 50.84 54.33 60.15 74.13 74.79 73.19 65.93 50.81 46.29 a 33.68 54.60
2013 33.00 32.02 a 40.65 a 46.50 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 35.22
Period of Record Statistics
MEAN 32.70 34.66 40.57 48.80 57.32 66.69 72.50 71.12 63.01 52.55 41.40 34.18 51.37
S.D. 4.78 5.07 4.57 3.34 2.92 3.21 2.51 2.31 2.98 3.49 3.93 4.41 1.51
SKEW -0.66 -0.55 0.02 -0.08 -0.19 0.15 0.08 -0.15 -0.07 -0.50 -0.18 -0.68 0.35
MAX 43.47 47.59 54.47 56.67 64.31 74.95 78.29 76.42 69.75 61.94 53.07 44.10 56.02
MIN 16.40 18.02 29.39 39.67 49.42 60.28 67.05 65.24 55.40 41.48 31.10 19.90 48.42
NO YRS 113 113 114 116 115 115 114 113 113 114 110 110 93