YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.60 | 16.55 | 22.07 | j | ||
1915 | 11.77 | 26.91 | q | 28.20 | a | 36.40 | 38.71 | 48.90 | 55.00 | 54.68 | 48.45 | a | 37.35 | 25.43 | 19.20 | a | 36.74 | a | ||||||||
1916 | 19.37 | d | 24.21 | 29.06 | 33.30 | 37.77 | 51.33 | 53.19 | 53.23 | 48.77 | 36.03 | 20.87 | ----- | z | 37.01 | a | ||||||||||
1917 | ----- | z | ----- | z | ----- | z | 35.15 | d | 40.90 | a | 50.87 | 61.97 | b | 54.42 | 48.17 | 36.52 | 28.50 | 22.26 | 42.08 | c | ||||||
1918 | 13.23 | a | 20.21 | 31.00 | 31.27 | 38.97 | 55.07 | 54.65 | 54.81 | 49.03 | 37.13 | ----- | z | ----- | z | 38.54 | b | |||||||||
1919 | ----- | z | ----- | z | 29.68 | 32.67 | ----- | z | ----- | z | ----- | z | ----- | z | 49.77 | 33.42 | 39.34 | a | ----- | z | 36.97 | g | ||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.93 | b | 38.17 | b | 25.13 | 17.71 | 32.49 | h | ||
1952 | 20.81 | 20.43 | a | 23.40 | a | 34.53 | 40.33 | g | 52.76 | e | 56.85 | r | 55.55 | 50.00 | 41.32 | 21.40 | 18.26 | 33.85 | b | |||||||
1953 | 23.33 | a | 20.26 | a | 27.58 | 31.16 | e | 34.91 | t | 53.70 | 61.26 | 56.13 | 52.50 | 39.06 | 29.23 | 16.74 | 37.36 | a | ||||||||
1954 | 23.84 | 25.25 | 25.39 | 39.93 | b | 45.86 | b | 51.40 | 58.88 | g | 55.76 | b | 50.80 | 40.48 | 28.86 | a | 17.32 | f | 38.76 | b | ||||||
1955 | 13.59 | d | 11.36 | 23.26 | 32.60 | 39.60 | a | 49.44 | e | 50.90 | 50.52 | 40.87 | 40.74 | 26.52 | e | 25.39 | 33.73 | |||||||||
1956 | 26.35 | 19.03 | 25.61 | 33.68 | b | 43.68 | c | 53.71 | b | 55.75 | c | 53.04 | g | 47.23 | 36.65 | 17.71 | i | 13.33 | m | 37.97 | c | |||||
1957 | 21.16 | 29.11 | 31.04 | d | 29.13 | 40.83 | a | 53.55 | h | 64.00 | h | 56.29 | 46.83 | 40.04 | e | 21.30 | g | 21.17 | h | 36.80 | d | |||||
1958 | 16.43 | h | 26.68 | f | 24.44 | f | 32.22 | g | 44.32 | l | 51.81 | c | ----- | z | ----- | z | 47.52 | i | 38.24 | f | 27.19 | d | 28.08 | s | 39.50 | j |
1959 | 19.41 | d | 21.37 | i | 29.26 | d | 37.93 | b | 42.06 | o | 56.38 | q | 57.68 | 54.13 | 48.67 | 34.74 | h | 23.50 | d | 15.88 | w | 38.65 | e | |||
1960 | ----- | z | ----- | z | 26.13 | h | 30.89 | u | ----- | z | 52.84 | e | 59.13 | p | 60.17 | y | ----- | z | 37.23 | e | ----- | z | ----- | z | 45.04 | j |
1961 | 14.79 | b | 25.14 | g | 27.14 | b | 31.70 | g | 42.16 | f | 54.07 | c | 58.38 | b | 56.46 | c | 46.63 | 37.48 | b | 27.54 | b | 15.00 | b | 37.50 | c | |
1962 | 9.52 | h | 23.30 | e | 22.27 | i | 39.52 | e | ----- | z | 52.32 | k | 57.36 | c | 57.41 | d | 51.12 | e | 41.08 | f | 32.77 | h | 22.12 | f | 45.74 | g |
1963 | 11.24 | b | 25.19 | b | 28.15 | d | 34.26 | c | 46.97 | b | 52.21 | b | 61.28 | b | 57.57 | a | 52.07 | b | 45.86 | b | 30.93 | a | 16.64 | c | 38.53 | |
1964 | 15.59 | b | 7.59 | 21.63 | a | 30.03 | a | 41.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.60 | ----- | z | 22.56 | f | |||
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.23 | 46.10 | 38.90 | ----- | z | ----- | z | 46.74 | i | |||
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.80 | a | 17.80 | k |
1967 | 15.83 | a | 20.43 | 30.87 | 31.67 | 39.53 | a | 49.30 | 58.68 | 55.30 | a | ----- | z | 36.50 | q | 30.14 | a | ----- | z | 36.86 | c | |||||
1968 | ----- | z | ----- | z | ----- | z | 28.38 | f | 38.90 | 52.80 | 55.94 | 51.26 | 44.53 | 24.96 | g | 24.17 | 4.23 | a | 38.83 | e | ||||||
1969 | 8.77 | 7.79 | 11.39 | 27.20 | 36.26 | 41.17 | 54.29 | 53.35 | 48.48 | a | 29.61 | 25.17 | 18.66 | b | 30.18 | |||||||||||
1970 | 13.53 | a | 23.43 | 22.55 | 27.83 | 43.77 | a | 50.50 | 58.10 | 58.93 | a | 44.23 | 31.10 | 27.30 | 20.71 | 35.17 | ||||||||||
1971 | 21.04 | c | 18.75 | 24.84 | 33.20 | 40.71 | 53.13 | 60.71 | 57.10 | b | 45.63 | 35.81 | 27.10 | 20.03 | 36.50 | |||||||||||
1972 | 18.74 | 24.17 | 33.19 | 35.53 | 41.42 | 53.21 | a | 59.81 | 57.71 | 51.37 | 42.90 | 26.16 | e | 15.84 | 38.34 | |||||||||||
1973 | 10.87 | 20.81 | a | 25.70 | a | 31.03 | 42.61 | 50.63 | 58.13 | 56.13 | 46.73 | 38.35 | 29.20 | 19.70 | a | 35.83 | ||||||||||
1974 | 11.77 | a | 13.60 | c | 31.70 | a | 32.40 | 45.29 | 55.33 | 58.84 | 55.65 | 48.10 | 41.23 | 26.55 | a | 12.48 | 36.08 | |||||||||
1975 | 13.93 | b | ----- | z | 22.87 | 26.07 | 36.35 | 43.97 | 54.58 | 52.81 | 46.40 | 34.19 | 21.17 | 13.19 | 33.23 | a | ||||||||||
1976 | 8.84 | 23.48 | 20.03 | 29.97 | 40.42 | 46.97 | 53.19 | 52.10 | 44.93 | 30.32 | 23.90 | 15.45 | 32.47 | |||||||||||||
1977 | 11.58 | 21.69 | b | 23.29 | 35.57 | 39.94 | 54.53 | 57.94 | 57.18 | c | 50.80 | 39.42 | 29.03 | ----- | z | 38.27 | a | |||||||||
1978 | 21.74 | 22.71 | 31.35 | 35.43 | 39.13 | a | 51.92 | e | 57.25 | k | 55.17 | h | 47.08 | e | 40.08 | e | 29.30 | 10.35 | 32.91 | b | ||||||
1979 | 9.55 | 17.11 | ----- | z | 32.70 | 39.68 | 46.79 | a | ----- | z | 53.81 | 49.27 | 40.42 | 22.33 | 18.45 | 33.01 | b | |||||||||
1980 | 21.47 | a | 24.86 | a | 24.58 | 31.45 | a | 38.81 | 50.67 | c | 58.19 | 56.12 | e | 50.57 | 36.39 | 27.87 | 25.29 | c | 37.19 | |||||||
1981 | 22.81 | 23.68 | 28.87 | 39.67 | 42.74 | 54.87 | 59.06 | 57.42 | 51.13 | 38.81 | 30.63 | 21.97 | 39.30 | |||||||||||||
1982 | 17.68 | 19.19 | b | 30.14 | b | 34.79 | a | 41.71 | 48.93 | c | 56.00 | 57.77 | a | 51.33 | 34.24 | b | ----- | z | 23.90 | k | 39.18 | b | ||||
1983 | 17.48 | h | 40.21 | n | 29.04 | c | 30.03 | 39.42 | 48.90 | 57.40 | a | 56.97 | b | 51.07 | 39.65 | 27.63 | c | 24.29 | 40.44 | b | ||||||
1984 | 15.86 | b | 18.38 | 26.26 | 31.10 | 46.23 | 50.60 | 57.70 | a | 55.94 | 50.00 | a | 33.38 | g | 32.42 | k | 22.29 | c | 37.43 | b | ||||||
1985 | 12.40 | a | 11.71 | d | 30.11 | d | 38.96 | c | 47.65 | 54.38 | a | 60.23 | e | 57.90 | b | 47.31 | a | 41.00 | a | 30.00 | 22.30 | a | 37.83 | |||
1986 | 25.48 | 26.68 | 33.77 | 36.44 | c | 42.66 | b | 53.86 | a | 58.68 | 58.53 | a | 48.73 | 38.07 | a | 29.23 | 23.00 | a | 39.60 | |||||||
1987 | ----- | z | 22.37 | a | 25.65 | 36.93 | 43.97 | a | 54.48 | e | 56.61 | 56.58 | 48.93 | 43.23 | 27.62 | a | 18.19 | 39.51 | a | |||||||
1988 | 13.74 | 22.63 | b | 26.00 | a | 34.31 | a | 42.94 | 55.03 | a | 58.97 | 57.73 | a | 45.96 | b | 43.34 | b | 28.60 | 17.29 | 37.21 | ||||||
1989 | 14.57 | a | 20.48 | a | 31.39 | 40.25 | b | 44.90 | 52.52 | a | 60.77 | a | 57.03 | 51.55 | a | 40.07 | b | 27.37 | 18.10 | 38.25 | ||||||
1990 | 16.50 | a | 22.26 | a | 30.13 | 37.77 | 43.03 | ----- | z | 59.16 | 56.68 | 53.28 | a | 38.97 | a | 28.21 | a | 13.17 | a | 36.29 | a | |||||
1991 | 15.21 | b | 24.00 | a | 27.45 | 32.21 | a | 42.71 | 51.57 | 57.61 | 57.90 | b | 51.00 | 41.32 | 27.63 | 18.68 | 37.27 | |||||||||
1992 | 12.10 | 26.61 | a | 32.29 | 40.00 | 45.87 | 50.77 | 55.47 | a | 56.23 | 51.10 | 43.32 | 22.77 | 16.07 | a | 37.72 | ||||||||||
1993 | 25.20 | a | 26.39 | 29.55 | b | 34.47 | 45.47 | a | 51.52 | a | 57.00 | 56.77 | 48.50 | 38.16 | 24.40 | 18.35 | 37.98 | |||||||||
1994 | 19.87 | 22.11 | 31.62 | b | 35.21 | a | 44.58 | 55.93 | a | 59.65 | 60.26 | 51.60 | 38.43 | a | 24.18 | b | 22.74 | 38.85 | ||||||||
1995 | 21.58 | 30.64 | 30.97 | 32.55 | a | 40.23 | 50.44 | c | 58.17 | b | 60.13 | 52.27 | 35.71 | 32.53 | 23.32 | 39.05 | ||||||||||
1996 | 20.29 | 28.86 | 29.03 | 35.47 | 47.97 | a | 56.21 | a | 60.20 | a | 59.55 | 46.93 | a | 36.10 | a | 28.32 | e | ----- | z | 40.81 | a | |||||
1997 | 18.33 | a | 22.30 | a | 30.00 | ----- | z | 43.59 | b | 51.52 | a | 56.00 | a | 56.16 | 50.12 | n | 36.81 | 29.43 | b | 17.74 | 36.19 | b | ||||
1998 | 22.57 | a | 23.19 | b | 27.16 | 31.60 | 43.19 | 49.11 | l | 60.18 | i | 57.07 | q | 52.14 | p | 37.96 | d | 29.92 | e | 18.46 | g | 30.80 | e | |||
1999 | 24.89 | l | 23.65 | e | 32.25 | g | 32.00 | i | 39.74 | h | ----- | z | 56.33 | p | 56.31 | r | 48.82 | h | 40.41 | i | 33.54 | d | 18.04 | g | 28.60 | j |
2000 | 25.22 | m | 27.47 | j | 27.84 | f | 35.85 | q | ----- | z | 55.53 | k | 61.50 | q | 58.13 | p | 51.47 | m | 40.13 | h | 21.12 | m | 21.56 | m | ----- | z |
2001 | 16.71 | n | 22.21 | i | 24.83 | y | 39.78 | u | 42.56 | m | 51.00 | y | 58.89 | v | 58.60 | u | 52.93 | o | 40.37 | l | 32.00 | n | 12.67 | v | ----- | z |
2002 | 15.50 | u | 16.36 | q | 28.88 | w | 34.50 | x | ----- | z | ----- | z | ----- | z | ----- | z | 53.90 | j | 40.17 | m | 40.47 | m | ----- | z | ----- | z |
2003 | 26.25 | s | 18.50 | t | ----- | z | 29.50 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | 26.40 | r | 27.80 | k | 30.42 | r | 41.29 | j | 49.97 | a | 59.37 | d | 56.39 | c | 51.77 | 39.78 | d | 28.38 | d | 16.29 | c | 43.13 | e | |
2006 | 19.86 | b | 21.15 | b | 27.11 | d | 35.41 | a | ----- | z | 55.11 | b | 60.96 | c | 57.17 | a | 44.30 | c | 38.47 | a | 29.79 | a | 19.21 | b | 37.14 | a |
2007 | 13.13 | 25.11 | ----- | z | 32.00 | j | 44.81 | 52.00 | c | 59.26 | 59.48 | 50.93 | a | 36.87 | a | 29.59 | c | 20.84 | l | 41.24 | c | |||||
2008 | 14.62 | j | 22.48 | d | 23.83 | b | 33.17 | 39.07 | a | 51.00 | 57.93 | a | 57.30 | d | 53.89 | k | 36.62 | b | 31.08 | d | 19.77 | a | 37.22 | b | ||
2009 | 17.94 | 22.36 | c | 30.50 | e | ----- | z | 48.13 | 52.03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.19 | g | |||
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.91 | h | 60.94 | 58.17 | s | ----- | z | ----- | z | ----- | z | ----- | z | 60.94 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.05 | 21.58 | 27.52 | 33.87 | 42.20 | 51.68 | 57.84 | 56.24 | 48.81 | 38.23 | 27.42 | 18.32 | 36.85 | |||||||||||||
S.D. | 4.81 | 4.94 | 4.07 | 3.45 | 3.08 | 2.95 | 2.44 | 2.13 | 2.63 | 3.26 | 3.55 | 4.14 | 2.42 | |||||||||||||
SKEW | 0.10 | -1.12 | -1.41 | 0.01 | 0.12 | -1.22 | -0.63 | -0.58 | -0.64 | -0.43 | 0.19 | -0.88 | -1.34 | |||||||||||||
MAX | 26.35 | 30.64 | 33.77 | 40.25 | 48.13 | 56.21 | 61.97 | 60.26 | 53.28 | 45.86 | 39.34 | 25.39 | 39.60 | |||||||||||||
MIN | 8.77 | 7.59 | 11.39 | 26.07 | 36.26 | 41.17 | 50.90 | 50.52 | 40.87 | 29.61 | 18.60 | 4.23 | 30.18 | |||||||||||||
YRS | 45 | 45 | 47 | 47 | 45 | 48 | 45 | 48 | 49 | 49 | 50 | 40 | 20 |