YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.27 | 53.24 | b | 43.87 | 35.52 | 49.47 | h | |||
1921 | 38.16 | 43.54 | 50.03 | a | 49.27 | 57.74 | 69.23 | 80.10 | 77.87 | 68.50 | 61.00 | 46.48 | a | 44.69 | b | 57.22 | ||||||||||
1922 | 37.39 | ----- | z | 44.13 | a | 47.87 | 58.70 | a | 69.80 | 79.57 | a | 78.47 | a | 73.33 | 55.80 | a | 41.38 | a | 42.52 | 57.18 | a | |||||
1923 | 40.48 | 42.00 | b | 42.83 | a | 51.47 | 59.71 | 61.60 | 77.19 | 76.27 | a | 67.70 | 53.16 | 48.70 | 42.07 | a | 55.27 | |||||||||
1924 | 36.40 | a | 42.55 | 42.68 | 50.90 | a | 61.30 | a | 70.27 | 76.35 | 74.97 | 70.23 | 50.71 | 44.70 | 38.23 | 54.94 | ||||||||||
1925 | 36.71 | 42.67 | a | 46.65 | 51.70 | 60.97 | 68.30 | 78.45 | 76.68 | 65.97 | 57.06 | 44.97 | 42.97 | 56.09 | ||||||||||||
1926 | 35.90 | 43.64 | 50.13 | 57.67 | 60.19 | 69.13 | 75.77 | 76.90 | 71.73 | 58.06 | 46.83 | a | 40.45 | 57.20 | ||||||||||||
1927 | 40.35 | 46.11 | 45.58 | 51.53 | 57.94 | 67.13 | 77.97 | a | 77.77 | 68.70 | 57.81 | 50.47 | 40.84 | 56.85 | ||||||||||||
1928 | 40.83 | a | 42.93 | a | 48.65 | 51.66 | a | 63.35 | 67.90 | 75.94 | 76.97 | 71.23 | 57.29 | 47.17 | 41.07 | a | 57.08 | |||||||||
1929 | 36.53 | a | 39.11 | 46.13 | 50.17 | 61.03 | 66.57 | 79.97 | 80.35 | 70.17 | 59.97 | 43.83 | 43.16 | 56.42 | ||||||||||||
1930 | 40.90 | 46.39 | 49.48 | 56.53 | 55.55 | 67.53 | ----- | z | 75.48 | 66.80 | 54.71 | 48.90 | 37.94 | 54.57 | a | |||||||||||
1931 | 38.45 | 46.50 | 47.90 | 56.60 | 62.35 | 68.57 | 81.81 | 78.07 | a | 67.77 | 56.61 | 44.36 | b | 39.69 | e | 57.39 | ||||||||||
1932 | 35.48 | f | 44.65 | f | 48.24 | b | 51.27 | 59.65 | 66.57 | 78.23 | a | 78.13 | 71.70 | c | 57.84 | 48.63 | 37.29 | 59.75 | b | |||||||
1933 | 36.70 | a | 37.19 | a | 46.52 | 50.23 | 55.94 | 67.60 | 80.00 | 78.10 | 73.43 | 63.06 | 48.10 | 41.33 | a | 56.52 | ||||||||||
1934 | 39.97 | 46.07 | a | 54.33 | a | 57.83 | 63.52 | 64.70 | 79.19 | 79.58 | 69.37 | 58.66 | b | 47.18 | b | 44.18 | c | 58.71 | ||||||||
1935 | 41.58 | g | 47.52 | c | 43.81 | e | 53.45 | a | 57.68 | 70.00 | a | 76.72 | b | 79.04 | d | 74.14 | a | 56.17 | a | 43.36 | b | 42.48 | b | 58.58 | a | |
1936 | 39.38 | e | 44.04 | c | 48.28 | f | 54.86 | a | 62.16 | 70.17 | a | 77.80 | a | 79.53 | a | 69.14 | a | 57.10 | a | 47.86 | b | 40.48 | f | 60.20 | b | |
1937 | 29.57 | h | 40.64 | f | 44.96 | c | 50.80 | 60.06 | 67.13 | 79.55 | b | 80.76 | b | 76.93 | 59.35 | 47.46 | b | 47.39 | c | 61.44 | b | |||||
1938 | 42.40 | f | 42.96 | e | 46.44 | d | 53.17 | a | 58.90 | 68.13 | 76.13 | 77.39 | 73.17 | 56.52 | 40.74 | c | 44.13 | a | 57.97 | a | ||||||
1939 | 40.89 | d | 37.11 | 47.00 | f | 54.21 | f | 60.45 | 66.33 | 76.50 | a | 80.10 | a | 71.27 | 56.58 | 50.80 | 44.68 | 58.47 | b | |||||||
1940 | 43.71 | 43.59 | 48.75 | c | 54.50 | 63.84 | 71.53 | 74.71 | 78.16 | 71.50 | 60.90 | 44.80 | 46.48 | 58.54 | ||||||||||||
1941 | 43.16 | 48.29 | 50.13 | 51.30 | 62.26 | 65.03 | 77.68 | 74.23 | a | 62.57 | 55.45 | 47.87 | 42.73 | a | 56.72 | |||||||||||
1942 | 42.81 | 40.32 | 45.16 | 51.47 | 56.87 | 65.37 | 79.35 | 77.42 | 66.07 | 57.97 | 47.43 | 41.90 | 56.01 | |||||||||||||
1943 | 41.03 | 44.93 | 49.10 | 53.97 | 61.35 | 65.90 | 77.00 | 78.68 | 73.40 | 59.29 | 46.00 | 42.03 | 57.72 | |||||||||||||
1944 | 39.16 | 40.14 | 47.16 | 49.90 | 59.26 | 61.67 | 72.50 | a | 76.19 | 72.07 | 59.13 | 48.30 | 43.03 | 55.71 | ||||||||||||
1945 | 39.39 | 42.75 | 44.97 | 51.13 | 58.83 | a | 64.60 | 78.03 | b | 78.93 | a | 71.87 | 62.07 | a | 44.63 | 39.34 | b | 56.38 | ||||||||
1946 | 38.84 | 35.68 | 44.48 | 54.70 | 57.65 | 65.70 | 76.00 | 78.39 | 70.70 | 51.94 | 42.31 | a | 41.74 | 54.84 | ||||||||||||
1947 | 35.81 | 42.64 | 46.71 | 50.83 | a | 61.52 | 64.60 | 73.52 | 74.48 | 72.13 | 56.77 | 42.33 | 38.10 | 54.95 | ||||||||||||
1948 | 39.06 | 39.82 | a | 40.97 | 51.50 | 55.77 | 62.97 | 74.48 | 76.39 | 69.67 | 59.81 | 42.30 | 36.68 | 54.12 | ||||||||||||
1949 | 33.16 | 36.18 | 43.71 | 53.40 | 57.73 | a | 68.90 | 75.71 | 72.58 | 74.67 | 54.00 | 49.37 | 37.97 | 54.78 | ||||||||||||
1950 | 35.00 | 42.71 | 47.00 | 54.77 | 56.35 | 64.33 | 77.03 | 72.42 | 65.37 | 58.35 | 48.77 | 42.74 | 55.40 | |||||||||||||
1951 | 37.94 | 41.00 | 44.65 | 51.97 | 56.87 | a | 62.47 | 77.00 | 75.00 | 69.80 | 57.26 | 46.97 | 39.81 | 55.06 | ||||||||||||
1952 | 36.03 | 40.03 | 42.77 | 53.63 | 62.03 | 63.13 | 74.90 | 77.03 | 70.30 | 60.06 | 42.63 | 38.90 | 55.12 | |||||||||||||
1953 | 41.55 | 37.67 | a | 44.00 | 49.90 | 53.74 | 62.03 | 79.19 | 73.97 | 64.30 | 54.29 | 48.47 | 37.26 | 53.86 | ||||||||||||
1954 | 37.52 | 46.79 | 42.79 | b | ----- | z | 56.77 | r | 63.73 | 75.87 | 72.74 | 69.20 | 56.69 | b | 46.73 | 39.97 | 55.20 | b | ||||||||
1955 | 36.97 | 36.82 | 42.81 | 46.33 | 55.35 | 62.83 | 71.77 | 77.17 | b | 68.30 | 58.52 | 45.10 | 40.84 | 53.57 | ||||||||||||
1956 | 39.93 | b | 34.83 | 42.42 | 49.87 | 57.32 | 66.48 | c | 71.95 | k | 69.96 | d | 69.28 | e | 55.03 | a | 42.83 | 38.17 | a | 51.47 | a | |||||
1957 | 41.45 | 46.43 | 47.52 | 50.52 | a | 54.63 | a | 67.59 | c | 76.07 | b | 74.93 | b | 65.83 | a | 56.55 | 43.16 | e | 41.48 | d | 55.51 | |||||
1958 | 37.78 | d | 44.48 | g | 44.69 | b | 50.68 | e | 62.09 | i | 65.40 | e | 71.64 | i | 77.77 | e | 69.88 | d | 60.56 | d | 44.23 | d | 41.09 | h | 56.37 | d |
1959 | 39.67 | d | 37.86 | f | 46.23 | 54.10 | 56.39 | 67.93 | 78.23 | a | 76.00 | c | 65.23 | 55.58 | 46.41 | a | 40.87 | 56.97 | a | |||||||
1960 | 35.10 | b | 37.70 | b | 47.90 | 50.83 | a | 56.03 | 67.93 | 74.23 | 75.27 | a | 68.63 | 55.39 | 43.40 | 36.47 | a | 54.07 | ||||||||
1961 | 39.59 | b | 40.39 | 43.37 | a | 49.33 | 54.55 | 67.57 | 75.77 | 75.35 | 63.27 | 52.33 | a | 42.50 | 38.16 | 53.52 | ||||||||||
1962 | 36.89 | d | 40.82 | 40.60 | a | 52.50 | 52.81 | 62.97 | 71.94 | 73.63 | a | 70.43 | 54.43 | a | 44.68 | b | 39.87 | 53.46 | ||||||||
1963 | 34.14 | b | 44.86 | ----- | z | 46.17 | 57.84 | 60.87 | 73.23 | 75.39 | 69.73 | 59.06 | 46.77 | 36.00 | a | 54.91 | a | |||||||||
1964 | 31.26 | 33.07 | a | 39.55 | 47.40 | 53.59 | b | 62.67 | 74.67 | a | 75.55 | 65.33 | 60.00 | a | 40.77 | 38.10 | a | 51.83 | ||||||||
1965 | 38.61 | 37.65 | b | 42.63 | a | 50.27 | 54.39 | 58.73 | 71.60 | a | 73.65 | 62.50 | 55.03 | 48.20 | 40.74 | 52.83 | ||||||||||
1966 | 35.43 | a | 36.00 | a | 44.39 | 52.17 | 60.23 | 65.37 | 75.13 | 77.97 | 69.50 | 55.65 | 46.77 | 39.94 | 54.88 | |||||||||||
1967 | 36.32 | 40.04 | 46.35 | 45.20 | 55.84 | 63.03 | a | 77.58 | 76.61 | 67.93 | 55.26 | 48.55 | a | ----- | z | 55.70 | a | |||||||||
1968 | 36.06 | 45.86 | a | 45.74 | 48.33 | 55.97 | 62.28 | a | 71.61 | 68.68 | 61.43 | 52.20 | a | 42.80 | 32.20 | a | 51.93 | |||||||||
1969 | 44.06 | 40.07 | 42.71 | 51.20 | 58.52 | 63.27 | 74.43 | a | 77.13 | 68.97 | 52.03 | 48.90 | 41.32 | 55.22 | ||||||||||||
1970 | 37.74 | 43.29 | 44.42 | 45.10 | 56.61 | 64.33 | 75.61 | 77.32 | 65.97 | 53.19 | 45.27 | 38.55 | 53.95 | |||||||||||||
1971 | 37.87 | 39.14 | 43.42 | 49.13 | 52.58 | 62.14 | b | 75.13 | 77.20 | a | 68.00 | 52.65 | 41.47 | 37.29 | 53.00 | |||||||||||
1972 | 34.27 | a | 39.34 | 48.81 | 50.00 | 56.48 | 66.40 | 74.74 | 71.61 | 65.43 | 57.13 | 42.20 | 38.77 | 53.77 | ||||||||||||
1973 | 36.90 | 42.93 | 44.10 | 48.19 | c | 58.45 | 66.48 | c | 73.42 | 71.74 | 61.93 | 53.40 | a | 44.00 | b | 38.42 | 53.33 | |||||||||
1974 | 40.29 | 37.78 | a | 47.10 | 49.97 | 58.68 | 68.73 | 72.86 | b | 68.84 | f | 71.79 | a | 57.81 | 40.50 | 35.35 | 52.81 | a | ||||||||
1975 | 35.60 | a | 38.48 | c | 44.10 | b | 47.43 | 53.81 | 64.07 | b | 76.03 | 71.59 | b | 69.15 | d | 52.42 | 40.55 | h | 38.48 | 53.74 | a | |||||
1976 | 37.52 | 43.24 | 43.60 | a | 47.57 | 56.65 | 63.47 | 73.52 | 69.45 | 68.03 | 56.94 | 47.10 | 36.97 | 53.67 | ||||||||||||
1977 | 38.90 | 39.14 | 41.16 | 50.30 | 53.61 | 66.63 | 75.19 | 75.74 | 68.23 | 59.35 | 46.34 | a | 43.61 | 54.85 | ||||||||||||
1978 | 42.26 | 41.75 | 50.37 | a | 52.60 | 57.58 | 66.77 | 75.52 | 72.48 | 67.83 | 60.03 | 45.40 | 35.35 | 55.66 | ||||||||||||
1979 | 36.58 | 37.22 | a | 43.20 | a | 49.20 | 59.61 | 65.73 | 69.84 | 67.84 | 67.33 | 52.00 | 39.93 | a | 38.81 | 52.27 | ||||||||||
1980 | 43.77 | 45.97 | 45.10 | 49.34 | a | 55.65 | 63.57 | 75.74 | 72.58 | 65.13 | 55.35 | 43.07 | 42.26 | 54.79 | ||||||||||||
1981 | 43.26 | 41.25 | 46.29 | 53.53 | 58.58 | 70.93 | 77.42 | 77.10 | 70.83 | 53.07 | a | 45.77 | 41.13 | 56.60 | ||||||||||||
1982 | 38.16 | 44.46 | 45.19 | 51.37 | 56.84 | 61.80 | 74.23 | 76.10 | 68.50 | 52.61 | 44.90 | 40.35 | 54.54 | |||||||||||||
1983 | 39.90 | a | 42.39 | 48.03 | 47.87 | 57.29 | 64.63 | 74.90 | 75.52 | 75.53 | 59.81 | 47.07 | 42.70 | a | 56.30 | |||||||||||
1984 | 42.03 | 39.69 | 46.26 | 50.57 | 62.23 | 67.73 | 77.52 | 76.39 | 73.30 | 54.35 | 43.60 | 42.72 | b | 56.37 | ||||||||||||
1985 | 40.61 | 40.71 | ----- | z | ----- | z | 60.37 | a | 68.13 | 77.06 | 74.71 | 63.93 | 58.84 | 45.57 | 41.13 | 57.11 | b | |||||||||
1986 | 44.94 | 44.12 | b | 49.84 | 52.97 | 59.65 | 69.00 | 73.97 | 79.52 | 63.87 | 54.39 | 47.97 | 41.17 | a | 56.78 | |||||||||||
1987 | 38.45 | b | 41.75 | d | 45.16 | 55.79 | a | 61.23 | 67.63 | 71.42 | 74.65 | 68.39 | b | 62.79 | b | 46.70 | 39.10 | a | 56.09 | |||||||
1988 | 40.29 | 43.66 | 46.27 | a | 52.00 | a | 58.29 | 67.00 | 76.84 | 74.58 | 66.50 | 64.13 | 47.72 | a | 39.03 | a | 56.36 | |||||||||
1989 | 39.90 | b | 41.89 | 49.39 | 56.59 | a | 60.16 | 67.37 | 77.50 | c | 75.10 | 69.39 | b | 57.07 | a | 46.33 | 39.37 | d | 56.67 | |||||||
1990 | 38.00 | 37.12 | b | 46.47 | a | 54.17 | 56.69 | b | 68.66 | a | 77.65 | 74.68 | 70.46 | b | 57.61 | 46.17 | 38.03 | 55.47 | ||||||||
1991 | 40.81 | 45.48 | a | 44.71 | 50.57 | 56.03 | a | 64.00 | 72.19 | 76.19 | 71.63 | 61.26 | 48.70 | 44.07 | a | 56.30 | ||||||||||
1992 | 43.00 | 47.41 | 49.06 | 55.80 | 64.52 | 68.50 | 76.48 | 81.77 | 74.93 | 61.35 | 47.62 | a | 43.83 | b | 59.52 | |||||||||||
1993 | 45.33 | a | 44.25 | 49.77 | 53.47 | 62.19 | 65.80 | 72.32 | 75.40 | a | 69.20 | 60.37 | a | 45.73 | 40.16 | 57.00 | ||||||||||
1994 | 39.57 | a | 41.04 | 49.90 | 52.93 | a | 59.39 | 72.00 | 75.74 | 80.06 | 72.67 | 55.67 | a | 43.07 | 41.16 | 56.93 | ||||||||||
1995 | 43.32 | 48.67 | d | 48.96 | f | 51.63 | c | 58.23 | 64.63 | 74.35 | 80.87 | 75.47 | 57.63 | a | 51.20 | e | 42.17 | a | 58.92 | a | ||||||
1996 | 41.11 | c | 47.97 | 48.93 | a | 54.66 | a | 62.00 | h | 67.41 | a | 80.40 | a | 80.20 | a | 71.86 | a | 57.69 | e | 49.70 | 41.96 | c | 58.35 | a | ||
1997 | 43.77 | 42.42 | b | 48.00 | 53.77 | 66.21 | b | 66.03 | 74.11 | c | 81.03 | a | 74.96 | f | 57.93 | a | 48.30 | g | 40.07 | d | 57.34 | b | ||||
1998 | 41.87 | 44.19 | a | 47.10 | a | 49.43 | b | 57.30 | h | 63.36 | e | 78.33 | a | 81.00 | d | 71.64 | e | 56.00 | g | 45.13 | o | 40.15 | r | 59.61 | d | |
1999 | ----- | z | ----- | z | ----- | z | 46.25 | r | ----- | z | 63.11 | k | 76.58 | s | 75.74 | l | 74.62 | n | 58.75 | s | 49.89 | u | 38.00 | w | ----- | z |
2000 | 42.50 | q | 46.12 | u | 46.44 | v | 53.30 | t | 60.14 | q | 70.00 | m | ----- | z | 78.27 | p | ----- | z | ----- | z | 42.43 | w | 45.88 | w | ----- | z |
2001 | 41.71 | x | 37.71 | u | ----- | z | 47.00 | u | ----- | z | ----- | z | ----- | z | 75.29 | n | 70.89 | l | 61.36 | c | 51.31 | d | 37.14 | i | 56.33 | j |
2002 | 39.20 | p | 35.14 | u | 39.67 | y | 52.61 | g | 58.45 | i | 67.11 | k | 76.89 | l | 74.62 | o | 68.71 | m | 56.90 | j | 47.00 | r | 43.11 | v | ----- | z |
2003 | 44.05 | l | 44.94 | j | 46.68 | l | 51.60 | t | 60.61 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | 52.35 | h | 54.79 | k | 60.17 | m | 65.85 | q | 75.10 | j | 74.42 | l | 62.33 | u | 57.07 | p | 44.07 | p | 42.35 | k | ----- | z |
2005 | 43.88 | n | 47.68 | f | 48.05 | i | ----- | z | 73.50 | y | ----- | z | ----- | z | 86.83 | y | 71.67 | x | 59.33 | y | 60.80 | y | ----- | z | ----- | z |
2006 | ----- | z | 57.00 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.09 | 41.84 | 45.94 | 51.48 | 58.41 | 65.98 | 75.95 | 76.19 | 69.15 | 56.97 | 45.77 | 40.34 | 55.44 | |||||||||||||
S.D. | 2.93 | 3.56 | 2.79 | 2.81 | 2.96 | 2.74 | 2.48 | 2.97 | 3.41 | 3.02 | 2.72 | 2.76 | 1.67 | |||||||||||||
SKEW | -0.04 | -0.16 | 0.21 | 0.06 | 0.23 | -0.12 | -0.09 | -0.53 | -0.14 | 0.06 | -0.13 | -0.12 | -0.06 | |||||||||||||
MAX | 45.33 | 48.67 | 54.33 | 57.83 | 66.21 | 72.00 | 81.81 | 81.77 | 76.93 | 64.13 | 51.31 | 47.39 | 59.52 | |||||||||||||
MIN | 31.26 | 33.07 | 39.55 | 45.10 | 52.58 | 58.73 | 69.84 | 67.84 | 61.43 | 50.71 | 39.93 | 32.20 | 51.83 | |||||||||||||
YRS | 74 | 73 | 73 | 75 | 74 | 78 | 75 | 77 | 78 | 79 | 77 | 75 | 57 |