| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | 47.90 | j | 58.03 | 61.74 | 60.94 | 54.08 | 45.52 | 30.95 | 21.76 | 47.57 | ||||||||
| 1923 | 28.35 | 19.70 | 34.55 | 42.70 | 48.84 | 53.27 | 62.19 | 59.23 | 55.02 | 45.56 | 39.20 | 26.52 | 42.93 | |||||||||||||
| 1924 | 19.76 | 37.36 | 34.24 | 40.77 | 52.90 | 55.27 | 61.00 | 55.58 | 51.52 | 47.39 | 35.77 | 19.69 | 42.60 | |||||||||||||
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.89 | c | 64.50 | 60.18 | 53.48 | 43.26 | 36.90 | a | 32.21 | 49.92 | ||||||
| 1926 | 23.82 | 36.04 | 41.40 | 48.83 | 49.19 | 57.88 | 63.74 | 59.53 | 47.70 | 45.73 | 39.58 | 27.43 | a | 45.07 | ||||||||||||
| 1927 | 24.76 | 33.14 | 36.21 | 41.67 | 46.02 | 56.90 | 61.19 | 60.02 | 52.05 | 47.03 | 39.70 | 18.92 | 43.13 | |||||||||||||
| 1928 | 26.40 | 27.05 | 38.92 | 40.85 | 51.23 | 54.20 | 63.58 | 58.24 | 52.30 | 44.56 | 36.88 | 23.61 | 43.15 | |||||||||||||
| 1929 | 14.45 | 18.71 | 35.11 | 38.83 | 48.08 | 54.15 | 60.79 | 62.73 | 48.82 | 45.47 | 31.13 | 33.95 | 41.02 | |||||||||||||
| 1930 | 8.63 | 35.02 | a | 38.29 | 46.12 | 47.15 | 52.97 | 61.10 | 61.24 | 52.57 | 42.77 | 30.40 | 18.39 | 41.22 | ||||||||||||
| 1931 | 25.74 | 29.02 | 36.32 | 42.87 | 51.61 | 54.63 | 62.00 | 60.03 | 51.28 | 43.08 | 28.85 | 20.08 | 42.13 | |||||||||||||
| 1932 | 19.21 | 21.14 | 34.87 | 42.72 | 47.56 | 55.97 | 59.11 | 57.56 | 51.83 | 44.52 | 38.18 | 19.97 | 41.05 | |||||||||||||
| 1933 | 23.56 | 19.52 | 33.06 | 40.27 | 42.16 | 53.70 | 59.98 | 59.97 | 50.45 | 48.40 | 37.10 | 37.85 | 42.17 | |||||||||||||
| 1934 | 36.95 | 39.80 | 43.98 | 49.17 | 53.24 | 54.93 | 61.31 | 61.18 | 51.77 | 47.40 | 41.12 | 28.90 | 47.48 | |||||||||||||
| 1935 | 22.98 | 27.71 | 32.77 | 39.43 | 46.18 | 54.80 | 60.79 | 58.97 | 54.27 | 43.05 | 29.98 | 25.63 | 41.38 | |||||||||||||
| 1936 | 25.39 | 21.10 | 34.73 | 45.58 | 52.95 | 57.75 | 62.16 | 59.27 | 51.28 | 44.24 | 28.65 | 27.77 | 42.57 | |||||||||||||
| 1937 | 4.63 | 24.02 | 35.77 | 39.93 | 48.71 | 53.02 | 61.60 | 56.69 | 55.38 | 49.98 | 40.35 | 34.66 | 42.06 | |||||||||||||
| 1938 | 31.35 | 33.41 | 37.34 | 44.45 | 49.21 | 57.13 | 63.69 | 58.06 | 58.52 | 47.76 | 31.95 | 29.90 | 45.23 | |||||||||||||
| 1939 | 31.97 | 24.98 | 34.94 | 45.70 | 50.82 | 53.18 | 63.40 | 61.60 | 54.28 | 45.52 | 37.22 | 36.21 | 44.98 | |||||||||||||
| 1940 | 25.95 | 32.81 | 41.11 | 44.72 | 52.52 | 58.48 | 62.48 | 59.42 | 57.87 | 48.69 | 27.88 | 30.85 | 45.23 | |||||||||||||
| 1941 | 33.15 | 36.36 | 40.03 | 43.43 | 49.56 | 55.17 | 63.89 | 61.21 | 50.00 | 45.00 | 38.98 | 32.73 | 45.79 | |||||||||||||
| 1942 | 18.87 | 24.14 | 33.16 | 43.60 | 46.87 | 51.83 | 61.81 | 60.31 | 52.08 | 45.10 | 35.55 | 27.26 | 41.72 | |||||||||||||
| 1943 | 18.03 | 27.77 | 32.18 | 45.28 | 44.71 | 50.48 | 61.31 | 58.27 | 55.83 | 46.34 | 37.48 | 26.47 | 42.01 | |||||||||||||
| 1944 | 25.81 | 27.62 | 33.71 | 42.97 | a | 48.71 | 53.97 | 61.08 | 58.87 | 55.40 | 49.74 | 33.47 | 26.69 | 43.17 | ||||||||||||
| 1945 | 26.08 | 31.82 | 34.92 | 41.08 | 49.48 | 53.58 | 62.03 | 61.76 | 51.90 | 46.05 | 34.73 | 25.37 | 43.23 | |||||||||||||
| 1946 | 25.68 | 28.68 | 36.61 | 44.22 | 49.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.01 | ||||||
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.52 | d | 57.88 | e | 50.78 | n | 43.75 | m | 33.37 | o | 14.83 | j | 58.20 | |
| 1949 | 3.07 | c | 27.23 | d | 36.43 | d | 46.38 | e | 51.50 | d | 52.77 | o | 60.40 | p | 61.33 | s | 52.43 | p | ----- | z | 38.25 | l | 28.98 | c | 32.26 | |
| 1950 | 17.15 | a | 28.04 | 32.98 | 41.37 | g | 46.78 | h | 54.56 | f | 62.32 | 62.18 | 54.07 | 48.47 | 38.37 | 36.89 | 42.27 | |||||||||
| 1951 | 23.34 | 31.45 | 32.35 | 43.57 | 50.23 | 54.70 | 63.18 | 59.66 | 55.13 | 44.11 | 34.73 | 24.45 | 43.08 | |||||||||||||
| 1952 | 19.43 | a | 24.91 | 32.40 | 45.98 | 49.53 | 54.57 | 62.47 | 61.26 | 57.07 | 49.79 | 29.58 | 25.48 | 42.71 | ||||||||||||
| 1953 | 36.08 | a | 32.27 | 36.42 | 42.33 | 46.72 | a | 51.40 | 60.38 | c | 61.42 | 56.95 | 46.56 | 40.28 | 31.42 | 45.19 | ||||||||||
| 1954 | 29.97 | 38.11 | 34.29 | 43.57 | 50.84 | b | 52.57 | 60.85 | 57.06 | 52.83 | 44.21 | 39.71 | f | ----- | z | 46.43 | ||||||||||
| 1955 | ----- | z | ----- | z | ----- | z | 38.21 | a | 45.74 | 55.79 | a | 59.77 | 58.37 | d | 50.39 | g | 46.75 | c | 29.92 | d | 26.27 | 45.10 | ||||
| 1956 | 26.63 | 21.05 | 33.76 | 43.95 | 52.06 | 54.08 | 63.66 | f | 59.58 | m | 54.77 | 43.16 | 32.28 | 30.61 | 39.24 | |||||||||||
| 1957 | 12.27 | 26.46 | 37.69 | 43.12 | 50.59 | c | 55.28 | e | 58.85 | 55.88 | s | 53.89 | g | 43.90 | 33.25 | 31.81 | 39.32 | |||||||||
| 1958 | 29.81 | 39.31 | a | 33.21 | 41.77 | b | 54.17 | j | 58.04 | b | 62.92 | k | ----- | z | ----- | z | 46.02 | e | 35.87 | 34.55 | 39.82 | |||||
| 1959 | 32.74 | 30.80 | c | ----- | z | ----- | z | ----- | z | 57.61 | p | 62.16 | 58.02 | 53.47 | 46.29 | 34.08 | 28.77 | 43.29 | ||||||||
| 1960 | 19.23 | 27.02 | 36.18 | 42.78 | 46.87 | 54.28 | 63.76 | 57.45 | 53.70 | 44.10 | a | 34.70 | 27.47 | 42.29 | ||||||||||||
| 1961 | 30.53 | 38.11 | a | 38.05 | 41.65 | 46.97 | 59.63 | 62.67 | b | 64.72 | h | 50.17 | 44.47 | b | 30.90 | 28.00 | 42.83 | |||||||||
| 1962 | 23.90 | 30.11 | 32.97 | 46.52 | 47.55 | 53.67 | 60.26 | 60.58 | 56.43 | 46.93 | a | 38.52 | 32.37 | 44.15 | ||||||||||||
| 1963 | 19.60 | 41.00 | 37.84 | 40.32 | 49.89 | 55.05 | 58.66 | 61.29 | 59.98 | 48.82 | 38.25 | 28.74 | 44.95 | |||||||||||||
| 1964 | 28.66 | 28.69 | 34.79 | 41.17 | ----- | z | 50.88 | 62.35 | 58.94 | 52.57 | 47.94 | 34.37 | 29.02 | 42.67 | ||||||||||||
| 1965 | 28.55 | 35.05 | 36.44 | 46.18 | 48.92 | 57.82 | b | 62.90 | 62.47 | 49.83 | 49.27 | 39.73 | 27.00 | 45.35 | ||||||||||||
| 1966 | 30.19 | 29.12 | 38.45 | 44.42 | 51.53 | 55.15 | 59.73 | 60.82 | 56.85 | 44.65 | 39.48 | 31.77 | 45.18 | |||||||||||||
| 1967 | 32.68 | 34.52 | 35.71 | 39.20 | 48.35 | 56.67 | 62.81 | 65.52 | 59.12 | 45.56 | 35.85 | 25.11 | 45.09 | |||||||||||||
| 1968 | 26.66 | 37.14 | 40.63 | 40.22 | 48.82 | 56.48 | 63.10 | 59.26 | 54.05 | 42.85 | 35.52 | 27.08 | 44.32 | |||||||||||||
| 1969 | 22.50 | 26.93 | 33.77 | 43.98 | i | 50.79 | l | 59.25 | h | 59.88 | b | 58.81 | 54.57 | 38.87 | 35.67 | 30.71 | 40.19 | |||||||||
| 1970 | 26.55 | 35.29 | 33.79 | 35.75 | 47.74 | 59.55 | 63.52 | 61.39 | 48.95 | 43.18 | 36.91 | c | 22.34 | 42.91 | ||||||||||||
| 1971 | 27.72 | a | 32.62 | 31.89 | 40.52 | 49.30 | a | 53.45 | 63.69 | 65.79 | b | 48.02 | 39.63 | 33.45 | 25.50 | b | 42.63 | |||||||||
| 1972 | 26.33 | e | 29.62 | 39.42 | 38.72 | 48.71 | 57.78 | 60.84 | 62.37 | 49.22 | 43.31 | 36.00 | a | 18.69 | 42.58 | |||||||||||
| 1973 | 23.60 | 31.80 | 36.10 | a | 39.08 | 48.65 | 56.53 | 61.32 | 60.05 | 54.03 | a | 43.81 | b | 34.88 | 34.73 | 43.72 | ||||||||||
| 1974 | 19.92 | e | 34.25 | 37.26 | 41.86 | a | 46.89 | 58.95 | 60.66 | 60.05 | b | 53.13 | 43.82 | 35.35 | 27.62 | b | 43.31 | |||||||||
| 1975 | 26.92 | 28.87 | a | 33.85 | 37.20 | 47.47 | 52.87 | 62.73 | a | 57.11 | 53.05 | a | 44.68 | 32.85 | 31.63 | 42.44 | ||||||||||
| 1976 | 25.53 | 28.98 | 32.90 | a | 41.02 | 48.79 | 51.97 | 61.02 | a | 58.34 | 54.92 | 43.77 | 38.10 | 27.97 | 42.78 | |||||||||||
| 1977 | 18.94 | 34.64 | 33.29 | 44.25 | 45.44 | 58.03 | 60.11 | 63.92 | 51.17 | 45.05 | 34.08 | 32.50 | 43.45 | |||||||||||||
| 1978 | 30.66 | 34.91 | 41.62 | a | 41.62 | 46.82 | 56.22 | 61.95 | 59.32 | 51.72 | 44.65 | a | 27.73 | 18.24 | 42.96 | |||||||||||
| 1979 | 10.61 | 28.46 | 36.58 | 42.80 | 50.13 | 55.43 | 62.63 | 62.98 | 56.52 | 47.81 | 31.17 | 32.13 | 43.10 | |||||||||||||
| 1980 | 24.74 | 35.48 | 35.55 | a | 45.47 | 49.45 | a | 52.32 | 61.73 | 55.87 | 53.16 | b | 45.44 | 36.32 | 31.74 | 43.94 | ||||||||||
| 1981 | 33.92 | 32.30 | 37.53 | b | 42.47 | 48.90 | 53.68 | 58.48 | 62.63 | 53.20 | 42.52 | 37.53 | 31.06 | 44.52 | ||||||||||||
| 1982 | 23.68 | 25.25 | 35.03 | 38.48 | 46.08 | 58.48 | 60.37 | 61.53 | a | 52.03 | 43.68 | 31.95 | 27.03 | 41.97 | ||||||||||||
| 1983 | 31.65 | 35.73 | 39.66 | 39.80 | 49.03 | 52.92 | 58.21 | 64.31 | 49.97 | 43.26 | 37.03 | 19.52 | 43.42 | |||||||||||||
| 1984 | 23.56 | 28.83 | 36.81 | 40.58 | 46.47 | 53.57 | 61.15 | 61.92 | 50.02 | 40.47 | 34.43 | 19.77 | a | 41.46 | ||||||||||||
| 1985 | 14.77 | 19.98 | 28.23 | 43.37 | 48.69 | 55.17 | 65.02 | 57.60 | 47.32 | 41.58 | 20.47 | 13.74 | 37.99 | |||||||||||||
| 1986 | 29.55 | 33.73 | 42.61 | 40.98 | 49.13 | 60.10 | 57.34 | 63.73 | 48.72 | 45.76 | 37.13 | 29.32 | 44.84 | |||||||||||||
| 1987 | 20.19 | 29.59 | 40.89 | l | 47.78 | 51.35 | 57.77 | 60.85 | 58.52 | 55.17 | 45.53 | 36.58 | 27.89 | 44.66 | ||||||||||||
| 1988 | 25.86 | b | 32.05 | 36.84 | 45.10 | 49.24 | 56.28 | 61.84 | 59.44 | 52.57 | 51.56 | 34.92 | 22.66 | 44.03 | ||||||||||||
| 1989 | 21.71 | 14.86 | 35.63 | a | 45.77 | 47.98 | 56.52 | 60.16 | 59.10 | 52.23 | 42.11 | 37.05 | 29.37 | 41.87 | ||||||||||||
| 1990 | 31.15 | 28.23 | 37.02 | 45.27 | 46.44 | 54.05 | 61.87 | 61.05 | 56.12 | 42.95 | 37.52 | 18.52 | 43.35 | |||||||||||||
| 1991 | 21.94 | ----- | z | 35.08 | 40.58 | 45.85 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.15 | a | 35.52 | |||||
| 1992 | ----- | z | 38.64 | 41.23 | ----- | z | ----- | z | 58.85 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.24 | ||||
| 1993 | ----- | z | ----- | z | ----- | z | 41.72 | 53.92 | 54.17 | 54.73 | 57.42 | 51.27 | 49.84 | b | 28.82 | b | 30.89 | 46.97 | ||||||||
| 1994 | 33.76 | 28.88 | 38.53 | 44.47 | a | 49.98 | 54.69 | i | 62.27 | 60.29 | 55.63 | 42.24 | 29.05 | 27.06 | 42.92 | |||||||||||
| 1995 | 32.73 | 37.09 | 37.26 | 40.52 | 48.98 | 53.52 | 60.73 | 57.00 | b | 56.25 | 42.29 | 38.53 | 31.90 | 44.73 | ||||||||||||
| 1996 | 28.65 | 28.67 | 39.87 | l | 43.70 | 46.06 | 53.38 | 62.66 | 62.37 | 50.05 | 44.42 | 37.72 | 29.08 | 44.25 | ||||||||||||
| 1997 | 27.94 | 33.09 | 38.95 | i | 42.82 | 51.74 | 54.61 | c | 60.56 | 63.71 | 56.28 | 43.53 | a | 39.50 | i | 29.24 | 46.35 | |||||||||
| 1998 | 30.65 | 34.75 | 39.45 | 42.70 | 48.34 | 54.28 | 63.11 | v | 62.03 | 58.83 | 43.55 | 36.75 | 26.10 | 43.40 | ||||||||||||
| 1999 | 31.85 | g | 29.76 | i | 36.46 | e | 38.95 | h | 45.20 | d | 54.23 | d | 58.61 | c | 62.93 | i | 50.85 | f | 44.25 | c | 42.22 | e | 31.48 | a | 44.64 | |
| 2000 | 28.03 | a | 36.58 | e | 36.84 | f | 46.65 | c | 50.21 | c | 54.33 | a | 60.88 | b | ----- | z | 54.90 | f | 45.54 | c | 28.67 | d | 28.85 | h | 43.86 | |
| 2001 | 26.56 | f | 30.56 | b | 36.73 | r | 40.17 | l | 49.64 | x | ----- | z | ----- | z | ----- | z | 58.78 | n | 47.14 | b | 39.45 | k | 31.73 | p | 38.85 | |
| 2002 | 28.57 | p | 29.15 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.00 | z | ----- | z | 9999.00 | |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.84 | f | 9999.00 | |
| 2007 | 24.83 | d | 33.66 | 42.41 | b | 43.03 | 49.23 | 54.25 | v | 67.88 | e | ----- | z | ----- | z | 45.10 | b | ----- | z | ----- | z | 43.74 | ||||
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.80 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2009 | ----- | z | ----- | z | ----- | z | ----- | z | 49.36 | m | 60.33 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2010 | ----- | z | ----- | z | ----- | z | 42.82 | h | 44.39 | 53.13 | 59.35 | 58.05 | 54.17 | 46.37 | 36.91 | g | 29.61 | q | 52.58 | |||||||
| 2011 | 10.30 | z | 31.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 24.73 | 30.43 | 36.24 | 42.68 | 48.74 | 55.19 | 61.43 | 60.14 | 53.26 | 45.18 | 34.88 | 27.69 | 43.28 | |||||||||||||
| S.D. | 6.82 | 5.60 | 3.00 | 2.73 | 2.29 | 2.26 | 1.94 | 2.23 | 2.89 | 2.45 | 3.99 | 5.08 | 1.58 | |||||||||||||
| SKEW | -0.97 | -0.48 | 0.35 | 0.03 | -0.08 | 0.28 | -0.18 | 0.32 | 0.09 | 0.19 | -0.83 | -0.48 | -0.24 | |||||||||||||
| MAX | 36.95 | 41.00 | 43.98 | 49.17 | 53.92 | 60.10 | 67.88 | 65.79 | 59.98 | 51.56 | 42.22 | 37.85 | 47.48 | |||||||||||||
| MIN | 3.07 | 14.86 | 28.23 | 35.75 | 42.16 | 50.48 | 54.73 | 55.58 | 47.32 | 38.87 | 20.47 | 13.74 | 37.99 | |||||||||||||
| NO YRS | 72 | 73 | 69 | 71 | 71 | 71 | 73 | 69 | 69 | 76 | 71 | 73 | 53 | |||||||||||||