YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.95 | 38.46 | c | 31.88 | b | 41.10 | i | |
1916 | 19.97 | 34.74 | b | 45.73 | 52.02 | 55.48 | 63.83 | a | 67.03 | 70.84 | 62.72 | 51.81 | b | 34.92 | 26.98 | 48.84 | ||||||||||
1917 | 28.50 | a | 35.22 | c | 39.17 | a | 47.88 | f | 56.87 | a | 62.77 | 73.55 | b | 72.86 | b | 64.12 | 54.21 | 44.30 | 41.92 | 52.13 | a | |||||
1918 | ----- | z | 34.30 | 39.45 | a | 47.80 | b | 51.73 | 65.52 | 69.70 | a | 67.32 | 66.78 | 54.27 | 41.93 | a | 36.31 | 52.28 | a | |||||||
1919 | 32.07 | a | 36.55 | 46.26 | 52.80 | 57.52 | 62.77 | 72.71 | 71.23 | 60.75 | 49.31 | 39.62 | 23.12 | c | 50.39 | |||||||||||
1920 | 28.90 | 37.34 | 44.35 | 49.05 | 56.90 | a | 63.78 | 73.92 | 70.61 | 60.43 | 51.27 | 41.15 | 34.77 | 51.04 | ||||||||||||
1921 | 33.19 | 37.86 | 46.19 | 50.03 | a | 60.23 | 65.60 | 70.61 | 70.88 | a | 57.25 | 53.60 | 39.52 | 31.00 | 51.33 | |||||||||||
1922 | 18.85 | 31.88 | 41.53 | a | 49.93 | 57.73 | 71.18 | 74.24 | 70.90 | 65.65 | d | ----- | z | ----- | z | ----- | z | 53.54 | c | |||||||
1923 | ----- | z | ----- | z | ----- | z | 55.33 | 57.67 | d | 64.90 | 71.87 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.44 | h | ||
1924 | 33.80 | k | 41.92 | c | 43.72 | a | 50.89 | g | 66.79 | 68.20 | 73.84 | 70.54 | d | 63.77 | b | 52.31 | d | 40.41 | a | 26.19 | d | 54.77 | b | |||
1925 | 36.40 | 43.38 | 47.98 | a | 56.18 | 64.03 | 69.27 | 79.05 | 72.71 | 64.37 | 52.90 | 38.65 | 37.92 | 55.24 | ||||||||||||
1926 | 34.64 | c | 43.28 | a | 50.56 | 57.77 | b | 58.13 | 68.48 | 75.65 | 68.63 | 56.80 | g | 53.18 | 42.85 | 29.60 | 52.98 | a | ||||||||
1927 | 29.40 | a | 38.39 | 44.27 | 50.60 | 56.82 | 68.52 | 75.28 | a | 72.15 | 60.68 | 52.30 | a | 43.92 | 28.73 | 51.76 | ||||||||||
1928 | 29.45 | a | 36.59 | 46.70 | a | 49.38 | b | ----- | z | 67.37 | 77.00 | b | 72.18 | a | 64.95 | 52.32 | a | 40.37 | 31.31 | 51.60 | a | |||||
1929 | 17.50 | k | 24.73 | b | 45.73 | a | 49.62 | 61.13 | 66.14 | a | 73.21 | 74.63 | 61.43 | a | 54.63 | 36.81 | a | 35.02 | 53.01 | a | ||||||
1930 | 14.52 | 40.73 | 48.27 | a | 56.71 | a | 59.10 | a | 64.45 | a | 76.19 | b | 74.59 | b | 63.97 | 49.42 | 38.97 | 32.37 | 51.61 | |||||||
1931 | 34.80 | a | 38.62 | 45.56 | 54.10 | a | 64.40 | a | 66.29 | a | 76.09 | b | 74.13 | d | 63.15 | d | 52.86 | b | 37.08 | 26.66 | c | 52.81 | ||||
1932 | 28.28 | a | 33.76 | b | 45.87 | 54.65 | m | 60.63 | 70.45 | a | 70.17 | a | 71.83 | a | 64.75 | 53.02 | 42.84 | a | 30.03 | a | 51.97 | a | ||||
1933 | 33.69 | 30.73 | 43.63 | 52.60 | 56.61 | 68.42 | 75.35 | 73.82 | a | 60.00 | 57.10 | 42.20 | 40.81 | b | 52.91 | |||||||||||
1934 | 39.58 | 43.50 | 51.17 | a | 61.76 | a | 64.35 | a | 70.75 | 73.62 | a | 74.02 | 61.43 | a | 55.52 | 45.05 | 37.10 | 56.49 | ||||||||
1935 | 33.12 | b | 38.06 | a | 42.55 | a | 50.60 | 61.90 | 66.72 | 73.98 | 70.95 | 67.35 | 50.65 | 35.23 | 31.15 | a | 51.86 | |||||||||
1936 | 35.10 | 23.32 | a | 43.75 | a | 57.02 | c | 65.19 | 69.71 | b | 75.40 | 74.90 | 64.54 | b | 56.15 | 34.98 | 35.24 | b | 52.94 | |||||||
1937 | 15.66 | 29.58 | b | 46.40 | a | 50.92 | 61.08 | 68.10 | a | 76.63 | 68.76 | 66.22 | 57.06 | 45.00 | b | 35.72 | b | 51.76 | ||||||||
1938 | 34.50 | a | 35.98 | 45.09 | b | 55.11 | b | 61.79 | 70.53 | 78.18 | 71.48 | c | 69.68 | 53.53 | 38.05 | b | 35.79 | 54.14 | ||||||||
1939 | 34.97 | a | 35.24 | a | 47.15 | 55.70 | 62.67 | b | 64.57 | 73.95 | b | 73.23 | a | 64.68 | 53.08 | a | 40.75 | p | 35.30 | p | 56.52 | b | ||||
1940 | 29.97 | b | 38.60 | 49.53 | 54.08 | 64.00 | b | 72.45 | a | 75.48 | 74.83 | d | 67.60 | 55.90 | 34.87 | c | 33.84 | 54.26 | ||||||||
1941 | 33.13 | 39.84 | 49.92 | 56.67 | a | 60.98 | 67.72 | a | 79.83 | a | 73.50 | 60.95 | 52.08 | 42.90 | 36.34 | 54.49 | ||||||||||
1942 | 25.08 | 37.59 | 44.95 | 54.87 | 59.81 | 65.10 | 76.63 | 76.95 | b | 67.38 | 55.10 | 38.30 | 31.21 | 52.75 | ||||||||||||
1943 | 23.74 | 38.00 | c | 42.73 | 56.15 | 58.97 | 65.87 | 75.84 | 71.19 | 68.70 | 54.02 | 40.22 | a | 33.56 | 52.42 | |||||||||||
1944 | 30.27 | a | 38.07 | 43.39 | 54.13 | 62.03 | 68.05 | 76.40 | a | 72.55 | 67.84 | b | 58.56 | 39.53 | 31.21 | 53.50 | ||||||||||
1945 | 36.00 | 40.73 | 44.05 | b | 51.16 | a | 62.95 | 67.82 | 75.26 | d | 76.20 | h | 62.33 | c | 55.13 | a | 39.12 | 31.81 | 51.49 | a | ||||||
1946 | 35.08 | a | 39.50 | 44.97 | a | 52.37 | 63.14 | c | 66.15 | d | 74.60 | a | 74.10 | 62.38 | 49.19 | 36.78 | 35.62 | a | 52.82 | |||||||
1947 | 28.57 | a | 40.50 | a | 49.65 | 56.65 | 67.08 | e | 66.71 | d | 73.43 | a | 71.21 | 65.40 | 53.10 | 41.69 | a | 35.73 | c | 54.14 | ||||||
1948 | 33.02 | a | 33.22 | 41.94 | 49.05 | 59.34 | 72.97 | a | 71.36 | b | 69.22 | a | 62.10 | a | 50.10 | f | 40.38 | a | 29.00 | 51.05 | a | |||||
1949 | 16.90 | 33.61 | a | 45.37 | 56.33 | 65.48 | a | 67.91 | a | 73.37 | 72.65 | a | 65.71 | b | 48.90 | a | 45.07 | b | 36.03 | 52.28 | ||||||
1950 | 15.68 | 32.32 | 42.85 | k | 50.13 | g | 59.42 | 67.40 | 74.77 | 74.88 | a | 66.80 | 50.71 | 41.40 | 37.65 | 52.10 | b | |||||||||
1951 | 32.81 | 38.11 | 40.87 | 55.40 | 61.60 | 68.90 | 75.26 | 72.81 | 65.27 | 51.71 | 39.15 | 28.52 | 52.53 | |||||||||||||
1952 | 25.05 | 37.60 | 43.46 | e | 56.68 | b | 62.55 | 66.80 | 74.98 | a | 72.19 | b | 66.67 | 57.66 | 34.38 | 34.89 | 52.74 | |||||||||
1953 | 42.73 | 41.98 | 45.74 | b | 50.50 | 57.92 | a | 62.28 | 72.83 | a | 70.94 | 64.70 | 53.92 | 43.26 | e | 38.35 | 53.76 | |||||||||
1954 | 31.23 | 37.63 | a | 42.24 | 50.77 | 61.63 | 62.91 | b | 70.79 | 67.85 | 61.53 | 48.37 | 45.00 | 34.86 | i | 52.72 | a | |||||||||
1955 | 30.10 | u | 34.89 | n | 40.10 | b | 47.06 | e | 57.21 | e | 67.63 | g | 69.35 | a | 72.17 | a | 63.02 | 50.95 | 32.52 | 28.76 | 51.24 | c | ||||
1956 | 30.63 | a | 26.04 | a | 44.28 | a | 56.52 | a | 64.92 | 64.05 | b | 75.64 | b | 72.91 | b | 64.29 | b | 51.47 | 36.47 | a | 34.93 | b | 51.85 | |||
1957 | 18.25 | a | 36.33 | b | 44.43 | b | 54.59 | a | 65.71 | b | 68.46 | b | 70.58 | 69.19 | 66.42 | 51.21 | b | 40.03 | 38.19 | 51.95 | ||||||
1958 | 37.47 | 45.73 | 43.98 | a | 51.43 | 68.27 | 72.58 | 78.40 | 76.43 | a | 62.60 | 53.65 | a | 41.12 | 35.37 | a | 55.59 | |||||||||
1959 | 34.13 | a | 37.46 | 45.20 | a | 54.75 | 57.56 | 67.07 | a | 75.28 | a | 69.13 | a | 61.50 | b | 52.95 | 38.41 | a | 33.69 | b | 52.26 | |||||
1960 | 24.13 | 39.04 | a | 45.62 | a | 52.40 | a | 58.05 | a | 69.22 | a | 79.48 | c | 69.26 | 64.40 | 54.22 | a | 41.63 | 29.50 | 52.25 | ||||||
1961 | 35.97 | 44.04 | b | 46.61 | 53.05 | 60.28 | a | 72.93 | b | 77.10 | a | 78.32 | 61.87 | 51.08 | a | 36.23 | 34.76 | 54.35 | ||||||||
1962 | 32.60 | b | 38.41 | a | 42.95 | a | 56.22 | 57.38 | b | 67.25 | b | 73.20 | a | 68.58 | a | 65.33 | 50.95 | 43.17 | a | 37.31 | 52.78 | |||||
1963 | 27.09 | b | 38.41 | a | 46.25 | a | 50.27 | 61.50 | 67.72 | 70.68 | i | 73.31 | 69.33 | a | 54.98 | a | 43.38 | a | 30.87 | 51.19 | a | |||||
1964 | 36.84 | 39.46 | a | 42.76 | 50.37 | 58.87 | 66.12 | a | 72.40 | 68.42 | 61.82 | 52.37 | a | 39.12 | 28.45 | 51.42 | ||||||||||
1965 | 31.53 | a | 41.14 | 44.60 | 55.43 | a | 59.98 | b | 68.53 | 74.55 | a | 73.27 | 62.32 | 55.05 | 45.08 | 33.60 | 53.76 | |||||||||
1966 | 32.85 | 39.46 | a | 45.60 | 54.82 | 63.42 | 65.38 | 71.79 | 73.55 | 66.97 | 52.85 | a | 43.55 | 37.44 | 53.97 | |||||||||||
1967 | 40.18 | 43.75 | 43.76 | 47.77 | 61.11 | 70.37 | 75.70 | a | 77.50 | 69.02 | 54.26 | 41.88 | 33.45 | 54.90 | ||||||||||||
1968 | 35.39 | 42.43 | 47.22 | a | 50.82 | 60.50 | 68.22 | a | 76.44 | 69.35 | 65.00 | 49.81 | 41.83 | 31.35 | 53.20 | |||||||||||
1969 | 22.26 | 32.50 | 45.07 | c | 51.96 | b | 63.98 | 72.40 | 72.58 | 69.83 | a | 64.38 | 49.84 | 40.97 | a | 34.24 | 51.67 | |||||||||
1970 | 31.12 | a | 41.48 | a | 45.13 | 48.57 | 60.58 | 72.35 | 75.68 | 74.24 | d | 59.65 | 50.40 | 40.33 | 31.60 | 52.59 | ||||||||||
1971 | 38.44 | d | 39.84 | 41.42 | 50.72 | 63.47 | 63.70 | 75.73 | 77.95 | 59.82 | 50.84 | 41.33 | 32.42 | 52.97 | ||||||||||||
1972 | 30.97 | 35.36 | 47.82 | 49.22 | 65.18 | 69.50 | 74.87 | 75.28 | a | 60.17 | 52.15 | 41.48 | 28.56 | 52.55 | ||||||||||||
1973 | 30.03 | 38.64 | 47.42 | 55.38 | 63.94 | 69.27 | 77.50 | b | 74.18 | 66.08 | 52.95 | 38.93 | 37.88 | a | 54.35 | |||||||||||
1974 | 28.97 | a | 40.89 | 45.44 | 52.72 | 58.21 | 72.22 | 72.67 | a | 75.35 | 66.50 | 53.06 | 44.17 | c | 37.48 | a | 53.97 | |||||||||
1975 | 33.62 | a | 35.87 | a | 42.95 | 50.25 | 60.80 | a | 67.28 | 78.71 | 70.56 | 66.83 | 51.93 | a | 40.60 | 35.82 | a | 52.94 | ||||||||
1976 | 35.73 | c | 37.96 | a | 42.61 | 51.17 | 61.55 | 64.77 | 73.63 | 70.71 | 68.37 | 53.08 | a | 41.30 | 32.00 | 52.74 | ||||||||||
1977 | 25.62 | b | 40.43 | a | 45.58 | 59.17 | 57.10 | 73.45 | 74.23 | 78.97 | a | 61.97 | 52.81 | 39.60 | 36.87 | d | 53.81 | |||||||||
1978 | 33.18 | a | 39.54 | 49.16 | 52.55 | 58.85 | 70.82 | 75.63 | 71.76 | 62.45 | 52.74 | 34.12 | 29.85 | 52.55 | ||||||||||||
1979 | 17.34 | 35.23 | 47.87 | 52.27 | 64.15 | 70.90 | 77.21 | 74.42 | 68.17 | 55.84 | 35.98 | 36.32 | a | 52.97 | ||||||||||||
1980 | 23.48 | 33.74 | b | 44.31 | g | 56.38 | 61.65 | 64.62 | d | 74.66 | 69.58 | 64.83 | 53.03 | 41.64 | b | 32.42 | m | 54.36 | b | |||||||
1981 | 39.38 | c | 40.44 | b | 48.32 | 52.29 | d | 59.65 | 63.53 | 70.92 | 75.50 | 63.25 | 49.27 | 41.50 | 30.02 | a | 52.84 | |||||||||
1982 | 26.43 | d | 37.10 | c | 43.68 | a | 47.15 | 58.77 | 70.12 | a | 71.95 | 71.66 | 61.77 | 48.37 | 35.02 | 29.93 | a | 50.16 | ||||||||
1983 | 36.15 | a | 39.38 | 47.60 | 50.92 | 62.82 | 64.53 | a | 68.97 | 72.84 | 59.38 | 50.60 | a | 42.53 | 22.39 | c | 51.51 | |||||||||
1984 | 31.03 | 36.66 | a | 46.55 | 48.62 | 54.85 | a | 63.64 | a | 73.52 | 70.89 | 61.42 | 48.68 | 38.91 | a | 23.03 | a | 49.82 | ||||||||
1985 | 26.37 | 31.46 | 44.55 | 54.43 | 62.94 | 68.77 | 79.85 | 70.66 | 59.88 | 50.48 | a | 28.37 | 21.05 | a | 49.90 | |||||||||||
1986 | 31.77 | a | 38.96 | 48.72 | a | 50.52 | 60.69 | 71.93 | 69.22 | a | 76.08 | 60.00 | a | 53.47 | 41.27 | 30.32 | 52.75 | |||||||||
1987 | 30.53 | 39.34 | 45.95 | 56.33 | 64.10 | 69.57 | 72.19 | 71.97 | 66.63 | 53.77 | a | 42.67 | 29.79 | 53.57 | ||||||||||||
1988 | 29.50 | 39.33 | 45.52 | 53.92 | 58.52 | b | 66.37 | 73.69 | 71.76 | 63.03 | 58.32 | 42.98 | 30.40 | b | 52.78 | |||||||||||
1989 | ----- | z | 26.54 | 41.85 | a | 55.17 | 60.26 | 69.68 | 72.45 | 70.53 | 64.55 | 51.47 | 43.98 | 31.24 | 53.43 | a | ||||||||||
1990 | 37.85 | 36.95 | 46.71 | 57.02 | 57.75 | c | 67.13 | 76.74 | 73.92 | 69.38 | 49.55 | 44.22 | 24.37 | 53.47 | ||||||||||||
1991 | 28.27 | 42.52 | 42.39 | 52.63 | 58.13 | 63.22 | a | 74.05 | 75.03 | 66.53 | 52.06 | 39.80 | 34.42 | 52.42 | ||||||||||||
1992 | 36.11 | 41.19 | 50.10 | 53.92 | 63.70 | a | 73.15 | 72.63 | 73.10 | 61.33 | 53.44 | 39.18 | 27.33 | a | 53.76 | |||||||||||
1993 | 23.42 | 30.84 | 40.76 | 50.47 | 64.13 | 65.57 | 66.60 | 70.03 | 63.98 | 53.97 | 33.48 | 33.15 | 49.70 | |||||||||||||
1994 | 36.40 | 33.41 | 47.39 | 55.95 | 62.84 | 65.63 | 77.63 | 73.40 | 67.23 | 51.87 | a | 37.53 | 34.02 | 53.61 | ||||||||||||
1995 | 30.98 | 41.68 | 44.42 | 50.28 | a | 61.81 | 65.58 | 73.10 | 67.76 | 66.29 | a | 50.74 | 42.23 | 32.08 | 52.25 | |||||||||||
1996 | 29.32 | 31.29 | 44.47 | 52.33 | 55.63 | a | 65.62 | 74.94 | 71.24 | 60.65 | 50.24 | 36.30 | 26.84 | 49.91 | ||||||||||||
1997 | 29.32 | 37.88 | 45.13 | 50.22 | a | 62.16 | 65.00 | 71.73 | 74.32 | 64.35 | 50.55 | 40.93 | a | 31.39 | 51.91 | |||||||||||
1998 | 32.60 | 39.93 | 46.61 | 52.25 | ----- | z | 68.07 | 78.79 | 74.52 | 68.82 | 50.69 | 43.33 | 31.76 | 53.40 | a | |||||||||||
1999 | 36.45 | b | 39.57 | 44.82 | 51.15 | 56.18 | 65.82 | 70.11 | 74.13 | ----- | z | 50.68 | 44.71 | a | 37.19 | 51.89 | a | |||||||||
2000 | 31.71 | 37.86 | a | 44.11 | 54.45 | 59.39 | 67.25 | 72.76 | 72.32 | 62.78 | 50.43 | a | 33.66 | b | 29.75 | c | 51.37 | |||||||||
2001 | 33.05 | 36.11 | 46.18 | 50.62 | 61.42 | 64.72 | 74.11 | 74.52 | 66.77 | 51.60 | 41.53 | 34.58 | 52.93 | |||||||||||||
2002 | 36.00 | 38.36 | 41.26 | 51.73 | 58.26 | 68.82 | 75.94 | 71.32 | 63.88 | 50.61 | 39.37 | 34.85 | 52.53 | |||||||||||||
2003 | 37.81 | 39.39 | a | 48.13 | 51.53 | 59.29 | 70.52 | 77.19 | 73.65 | 66.83 | 56.11 | 36.67 | 32.50 | a | 54.13 | |||||||||||
2004 | 28.35 | 36.69 | 49.45 | 54.00 | 59.81 | 68.87 | 76.08 | a | 74.74 | 63.50 | 53.10 | 39.37 | 34.10 | b | 53.17 | |||||||||||
2005 | 31.85 | a | 38.32 | 49.23 | 52.50 | 62.87 | 65.90 | 75.15 | ----- | z | 63.21 | a | 52.90 | 37.83 | 25.47 | b | 50.47 | a | ||||||||
2006 | 37.08 | a | 35.84 | ----- | z | 51.50 | b | 60.45 | 67.60 | a | 76.97 | 71.98 | a | 63.95 | 51.68 | a | 39.38 | 27.19 | b | 53.06 | a | |||||
2007 | 28.52 | a | 36.46 | 46.09 | c | 51.35 | 61.35 | 67.05 | a | 77.18 | 71.60 | a | 63.18 | 49.42 | 38.37 | 32.00 | 51.88 | |||||||||
2008 | 28.05 | b | 40.41 | a | ----- | z | 46.88 | b | 61.97 | 65.38 | 74.26 | ----- | z | ----- | z | ----- | z | ----- | z | 24.35 | 48.76 | e | ||||
2009 | 30.87 | ----- | z | ----- | z | ----- | z | 60.05 | a | ----- | z | ----- | z | ----- | z | 65.87 | 48.53 | a | 39.95 | 23.97 | a | 44.87 | f | |||
2010 | 35.71 | b | 41.14 | 45.83 | a | 50.95 | 56.57 | a | 64.85 | 74.38 | a | 71.66 | 63.78 | 52.94 | 36.92 | 33.00 | 52.31 | |||||||||
2011 | 33.48 | 34.43 | 42.95 | 46.75 | 56.05 | 64.47 | 70.53 | 74.68 | 67.23 | 51.79 | 37.47 | 28.82 | 50.72 | |||||||||||||
2012 | ----- | z | 37.33 | 43.29 | 52.75 | 58.76 | 63.52 | 75.13 | 74.37 | ----- | z | 51.05 | ----- | z | 34.29 | 54.50 | c | |||||||||
2013 | 28.68 | 38.75 | 45.26 | 52.68 | 59.25 | y | 67.50 | ----- | z | 74.81 | 77.30 | y | ----- | z | ----- | z | ----- | z | 51.28 | f | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.72 | 37.39 | 45.23 | 52.68 | 60.64 | 67.46 | 74.31 | 72.55 | 64.20 | 52.45 | 39.88 | 32.15 | 52.63 | |||||||||||||
S.D. | 5.91 | 4.15 | 2.55 | 2.98 | 3.04 | 2.80 | 2.72 | 2.45 | 2.74 | 2.26 | 3.29 | 4.25 | 1.42 | |||||||||||||
SKEW | -0.84 | -1.04 | 0.02 | 0.25 | -0.02 | 0.29 | -0.37 | 0.16 | -0.04 | 0.46 | -0.65 | -0.39 | -0.18 | |||||||||||||
MAX | 42.73 | 45.73 | 51.17 | 61.76 | 68.27 | 73.45 | 79.85 | 78.97 | 69.68 | 58.56 | 45.08 | 41.92 | 56.49 | |||||||||||||
MIN | 14.52 | 23.32 | 39.17 | 46.75 | 51.73 | 62.28 | 66.60 | 67.32 | 57.25 | 48.37 | 28.37 | 21.05 | 48.84 | |||||||||||||
YRS | 91 | 95 | 92 | 93 | 95 | 96 | 95 | 93 | 92 | 94 | 93 | 93 | 72 |