YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 45.38 | v | 46.84 | 58.67 | 67.81 | 70.10 | 61.87 | 46.29 | 33.52 | a | 32.16 | 52.16 | d | |||||||
1936 | 30.52 | 35.10 | 39.71 | 46.47 | 54.03 | 64.27 | 72.06 | 70.94 | 60.83 | 48.84 | 38.30 | 32.03 | 49.42 | |||||||||||||
1937 | 23.39 | 31.93 | 37.61 | 41.13 | 49.65 | 58.17 | 70.74 | 70.35 | 65.73 | 49.61 | 36.73 | 36.65 | 47.64 | |||||||||||||
1938 | 33.00 | 36.79 | 39.06 | 45.57 | 52.55 | 60.47 | 68.13 | 69.23 | 62.83 | 47.84 | 30.33 | 35.81 | 48.47 | |||||||||||||
1939 | 32.23 | 28.36 | 36.39 | 44.73 | 49.61 | 56.72 | a | 68.93 | a | 69.13 | 60.43 | 41.77 | 38.20 | 32.71 | 46.60 | |||||||||||
1940 | 31.90 | 33.93 | 38.35 | 47.37 | 57.45 | 65.97 | 69.13 | 71.16 | 63.67 | 51.42 | 35.67 | 38.10 | 50.34 | |||||||||||||
1941 | 34.58 | 38.75 | 37.74 | 39.67 | 49.58 | 54.70 | 66.32 | 64.45 | 54.20 | 45.65 | 39.70 | 35.77 | 46.76 | |||||||||||||
1942 | 33.26 | 31.25 | 34.42 | 43.57 | 47.39 | 55.30 | 68.87 | 64.71 | 65.11 | l | 42.38 | g | 39.10 | a | 32.88 | e | 45.07 | b | ||||||||
1943 | 33.48 | 36.71 | 40.48 | 46.62 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.33 | h | |||
1944 | ----- | z | 35.25 | u | 39.77 | 42.43 | 52.77 | 56.43 | 75.06 | 82.48 | b | 75.83 | a | 64.58 | 49.10 | a | 45.20 | a | 58.37 | b | ||||||
1945 | 44.53 | a | 47.08 | b | 49.03 | 58.48 | a | ----- | z | 64.17 | 72.97 | a | 71.58 | 64.50 | 56.19 | ----- | z | ----- | z | 58.73 | c | |||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | 45.15 | c | 57.03 | 62.53 | 70.87 | 70.58 | 66.67 | 51.10 | 36.73 | 33.00 | b | 54.85 | c | |||||||
1948 | 31.86 | b | 33.69 | 38.03 | 45.14 | i | 51.23 | 60.67 | 69.71 | 71.48 | 62.87 | 51.71 | 33.97 | 32.06 | 48.84 | a | ||||||||||
1949 | 28.94 | 30.14 | 34.61 | 46.50 | 48.19 | 61.53 | 70.68 | 64.48 | 65.37 | 47.45 | 40.50 | 30.39 | 47.40 | |||||||||||||
1950 | 26.90 | 35.50 | 37.32 | 45.40 | 47.55 | 53.60 | j | 70.35 | 67.14 | i | 58.67 | 51.87 | ----- | z | ----- | z | 46.70 | d | ||||||||
1951 | 30.87 | 34.32 | 37.06 | 46.07 | 53.19 | 56.33 | 72.13 | 68.68 | 61.67 | 49.42 | 39.10 | 32.84 | 48.47 | |||||||||||||
1952 | 31.16 | 31.97 | 36.74 | 44.23 | 53.23 | 57.10 | 67.10 | 71.19 | ----- | z | ----- | z | 41.62 | i | 32.61 | 47.26 | c | |||||||||
1953 | 35.83 | a | 33.14 | 38.37 | a | 43.20 | 46.77 | 57.47 | 73.61 | 67.81 | 59.10 | 47.26 | 39.00 | 30.13 | 47.64 | |||||||||||
1954 | 32.65 | 37.64 | 37.90 | 45.87 | 53.23 | 61.90 | 75.45 | 68.97 | 63.53 | 50.97 | 40.47 | 31.81 | 50.03 | |||||||||||||
1955 | 33.58 | 30.39 | 36.39 | 40.60 | 50.61 | 59.03 | 65.48 | 69.16 | 56.57 | 49.16 | 36.50 | 31.74 | 46.60 | |||||||||||||
1956 | 32.00 | 26.31 | 34.32 | 42.87 | 51.45 | 61.67 | 69.32 | 65.26 | 62.93 | 47.23 | 32.60 | 28.47 | a | 46.20 | ||||||||||||
1957 | 36.42 | 40.82 | 39.87 | 43.73 | 48.94 | 64.00 | 72.10 | 69.16 | 58.90 | 50.16 | 35.23 | 31.61 | 49.25 | |||||||||||||
1958 | 29.84 | 37.07 | 36.26 | 42.28 | a | 56.48 | 62.27 | ----- | z | 74.97 | a | 64.33 | 53.23 | 40.50 | r | ----- | z | 50.75 | c | |||||||
1959 | 33.03 | 35.00 | a | 40.61 | 48.41 | a | 51.84 | 65.77 | 75.45 | 71.35 | 60.10 | a | 49.23 | 40.23 | 37.13 | 50.68 | ||||||||||
1960 | 30.77 | 32.93 | 40.94 | 43.77 | 50.77 | 63.93 | ----- | z | ----- | z | 64.90 | 51.58 | 39.73 | 30.70 | a | 45.00 | b | |||||||||
1961 | 34.61 | 37.37 | a | 40.03 | 46.00 | 50.83 | a | 65.67 | 73.55 | 72.81 | 60.50 | 47.84 | 37.43 | 34.32 | 50.08 | |||||||||||
1962 | 34.13 | 38.96 | 34.87 | a | 48.40 | 49.35 | 59.60 | 69.48 | 70.26 | 65.00 | 49.94 | 43.10 | 36.39 | 49.96 | ||||||||||||
1963 | 30.10 | 41.86 | 38.32 | 41.83 | 54.29 | 57.53 | 69.90 | a | 70.53 | a | 65.07 | a | 54.48 | 42.77 | 30.65 | 49.78 | ||||||||||
1964 | 27.07 | a | 28.62 | 36.70 | a | 43.52 | a | 49.74 | 58.90 | 70.00 | 68.52 | b | 61.10 | 52.62 | b | 35.80 | 33.26 | 47.15 | ||||||||
1965 | 35.68 | 34.04 | 36.66 | b | 42.40 | 45.68 | 52.59 | a | 68.58 | 67.65 | 57.24 | a | 49.86 | c | ----- | z | 35.48 | 47.80 | a | |||||||
1966 | 30.23 | 29.57 | 35.94 | 42.83 | 52.19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.15 | g | |||||
1967 | ----- | z | ----- | z | 43.67 | v | 40.87 | 52.97 | 57.93 | 72.61 | 70.44 | d | 62.40 | 49.45 | 40.80 | 30.71 | 53.13 | c | ||||||||
1968 | 32.52 | h | 40.97 | 42.48 | 42.93 | 50.23 | 61.33 | 66.81 | 65.94 | 57.93 | 45.81 | 37.33 | 26.87 | a | 48.97 | a | ||||||||||
1969 | 36.03 | 33.61 | 33.52 | 43.23 | 57.13 | 58.89 | b | 65.42 | 67.10 | 62.00 | 45.42 | 38.67 | 32.84 | 47.82 | ||||||||||||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | 32.04 | b | 40.94 | 41.53 | 51.81 | 62.23 | 69.50 | a | 66.00 | 62.83 | 51.46 | e | 39.27 | 30.06 | 49.79 | a | ||||||||
1975 | 30.39 | 33.61 | 38.26 | 39.40 | 50.00 | 59.73 | 71.55 | 66.26 | 62.23 | 47.81 | 37.07 | 35.43 | a | 47.64 | ||||||||||||
1976 | 33.03 | 40.28 | 38.23 | 43.43 | 54.90 | 61.70 | 73.06 | 66.55 | 62.77 | 48.94 | 38.90 | 30.65 | 49.37 | |||||||||||||
1977 | 33.10 | 36.61 | 35.55 | 46.47 | 51.16 | 64.23 | 71.70 | a | 71.94 | 64.23 | d | 53.87 | 41.67 | 38.39 | 50.74 | |||||||||||
1978 | 38.45 | 39.43 | 44.29 | 42.73 | 51.16 | 61.50 | b | 70.03 | 67.00 | 62.87 | 52.94 | 41.30 | 30.77 | 50.21 | ||||||||||||
1979 | 31.84 | 32.11 | 38.74 | 40.57 | 51.65 | 59.37 | 66.87 | 65.68 | ----- | z | 51.06 | 34.93 | 33.16 | 46.00 | a | |||||||||||
1980 | 39.48 | 40.34 | 38.71 | 43.07 | 49.97 | 57.20 | 70.55 | 69.29 | 62.20 | 50.58 | 39.30 | 37.00 | 49.81 | |||||||||||||
1981 | 38.39 | 37.32 | 40.32 | 48.50 | 54.84 | 67.43 | 74.06 | 71.74 | 63.53 | 48.77 | 40.00 | 37.26 | 51.85 | |||||||||||||
1982 | 34.31 | b | 39.36 | 40.10 | a | 43.50 | 52.06 | 57.10 | 68.84 | 72.03 | 61.86 | a | 46.27 | a | 41.03 | 35.35 | 49.32 | |||||||||
1983 | 34.06 | 39.43 | 41.19 | 39.59 | a | 51.19 | 59.67 | 70.81 | 69.35 | 67.27 | 52.58 | 38.87 | 35.55 | 49.96 | ||||||||||||
1984 | 32.90 | b | ----- | z | 40.06 | 44.17 | 55.74 | 61.93 | 72.97 | 70.26 | 65.20 | 47.42 | 38.30 | 34.06 | 51.18 | a | ||||||||||
1985 | 32.84 | 33.75 | 37.68 | 47.73 | 54.68 | 63.93 | 71.06 | 69.35 | 58.17 | 52.48 | 39.53 | 33.52 | 49.56 | |||||||||||||
1986 | 36.42 | 38.14 | 43.26 | 46.33 | 51.87 | 64.10 | 68.23 | 73.35 | 56.97 | 47.35 | ----- | z | 33.35 | 50.85 | a | |||||||||||
1987 | 32.10 | 35.71 | 38.03 | ----- | z | ----- | z | 63.17 | 65.45 | 70.58 | 60.77 | 55.52 | 40.40 | 32.06 | 49.38 | b | ||||||||||
1988 | ----- | z | 37.17 | 38.61 | ----- | z | 52.60 | a | 63.17 | 71.84 | 69.84 | 58.00 | 55.87 | 38.07 | 30.23 | 51.54 | b | |||||||||
1989 | 30.81 | 35.39 | 41.26 | 48.80 | 52.35 | 60.47 | 72.13 | a | 68.97 | 61.87 | 52.24 | b | 40.00 | 31.03 | a | 49.61 | ||||||||||
1990 | 33.00 | a | 34.25 | 42.19 | 49.30 | 53.21 | c | 64.30 | 72.45 | 67.00 | b | 64.47 | 51.03 | 38.70 | 28.00 | b | 49.83 | |||||||||
1991 | 33.83 | a | 38.57 | 38.48 | 41.47 | 48.84 | 57.90 | 68.52 | 70.13 | 65.17 | 53.16 | 39.77 | 36.77 | a | 49.38 | |||||||||||
1992 | 33.32 | 41.21 | a | 41.87 | a | 47.77 | 56.23 | 60.27 | 67.71 | 71.29 | 62.67 | 52.77 | 35.07 | 33.77 | 50.33 | |||||||||||
1993 | 39.24 | b | 38.19 | a | 41.58 | 43.90 | 54.29 | 59.57 | 65.48 | 67.45 | 57.87 | 50.23 | 37.37 | 30.93 | b | 48.84 | ||||||||||
1994 | 30.94 | 29.44 | j | 40.48 | f | 42.54 | b | 51.67 | d | 64.07 | a | 69.03 | a | 72.11 | c | 63.03 | a | 47.23 | a | 33.68 | b | 35.07 | b | 50.94 | b | |
1995 | 37.93 | b | 40.89 | 39.00 | a | 42.93 | a | 47.03 | b | 57.03 | 67.47 | a | 71.10 | b | 62.70 | 48.50 | c | 42.83 | 32.73 | a | 49.18 | |||||
1996 | 30.50 | a | 39.45 | 38.63 | a | 44.00 | b | 52.80 | a | 60.53 | 72.97 | b | 72.10 | a | 62.83 | 49.29 | 39.76 | a | 34.43 | c | 49.77 | |||||
1997 | ----- | z | 33.84 | c | 42.21 | b | 47.80 | 59.35 | 58.59 | a | 67.13 | ----- | z | 67.50 | 49.56 | f | 38.35 | d | 32.03 | a | 49.64 | c | ||||
1998 | ----- | z | 35.92 | b | 38.31 | b | 40.87 | 48.87 | 54.76 | a | 68.63 | a | 70.36 | c | 65.38 | a | 47.68 | 38.21 | a | 33.10 | 49.28 | a | ||||
1999 | 33.96 | e | 35.20 | c | 39.37 | a | 41.62 | a | 51.94 | 60.47 | 70.68 | 69.16 | 63.20 | 50.81 | 41.69 | d | 32.96 | g | 50.74 | a | ||||||
2000 | 35.86 | i | 37.04 | d | 43.03 | a | 50.07 | a | 58.19 | 64.15 | c | 69.73 | a | 72.83 | a | 62.90 | a | 50.93 | b | 34.46 | b | ----- | z | 54.33 | b | |
2001 | 29.53 | n | 33.74 | a | 39.84 | 42.47 | 56.73 | e | 64.68 | e | 69.96 | d | ----- | z | ----- | z | ----- | z | 49.08 | q | ----- | z | 51.24 | f | ||
2002 | 31.11 | d | 33.68 | c | 37.03 | 49.19 | n | 55.00 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.94 | i | |
2003 | ----- | z | 39.28 | j | 42.26 | 43.33 | 54.94 | 63.03 | ----- | z | ----- | z | ----- | z | ----- | z | 39.67 | i | 31.50 | m | 50.89 | h | ||||
2004 | 34.78 | h | ----- | z | 46.83 | m | 48.61 | g | 54.77 | i | 62.05 | h | 69.50 | c | 71.52 | d | 62.79 | f | 51.61 | c | 40.35 | m | 34.06 | o | 64.21 | i |
2005 | 35.67 | g | 38.15 | b | 36.70 | h | 40.25 | j | 51.19 | j | 56.21 | p | 67.22 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.15 | k |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.70 | ----- | z | ----- | z | ----- | z | ----- | z | 38.25 | j | 27.89 | m | 63.70 | k | |
2007 | 29.86 | j | 35.68 | i | 40.60 | k | 45.15 | j | 54.75 | k | 61.30 | j | 71.83 | m | 73.38 | o | 66.67 | u | 52.75 | w | 43.89 | k | 33.14 | q | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | 43.18 | h | 51.78 | m | 62.05 | j | 71.44 | m | 71.65 | n | 62.67 | l | 49.61 | m | 41.56 | l | 35.71 | n | ----- | z |
2009 | 37.50 | q | 33.59 | k | 36.64 | q | 43.11 | k | ----- | z | 63.50 | l | 73.73 | i | 69.14 | q | 63.75 | j | 47.00 | i | 38.13 | o | 31.29 | q | ----- | z |
2010 | 35.79 | q | 37.06 | j | 37.52 | 41.40 | 46.96 | e | 58.79 | p | 74.29 | 70.06 | ----- | z | 51.94 | 35.67 | 35.48 | 49.16 | d | |||||||
2011 | 30.17 | a | 30.14 | 40.06 | 47.87 | 50.26 | 61.80 | e | 70.36 | c | 73.50 | q | 64.13 | 50.45 | 38.57 | 30.43 | c | 46.75 | a | |||||||
2012 | 35.92 | s | 32.97 | 38.35 | 39.20 | y | 55.32 | 63.00 | e | 70.96 | e | ----- | z | 63.30 | t | 55.20 | u | 38.45 | h | 37.00 | q | 52.12 | g | |||
2013 | 29.93 | a | 32.86 | 43.19 | 48.00 | 55.27 | i | 64.48 | a | 74.74 | 69.71 | 61.07 | 45.48 | d | 37.47 | 33.29 | 49.11 | a | ||||||||
2014 | 35.61 | 37.75 | 41.84 | 45.47 | 53.26 | 61.57 | 72.87 | 68.16 | 65.73 | 54.26 | 41.97 | 37.77 | 51.35 | |||||||||||||
2015 | 36.74 | 41.39 | 42.65 | 46.40 | 54.03 | 67.50 | 68.81 | 71.10 | 67.10 | 56.87 | 38.03 | 31.10 | 51.81 | |||||||||||||
2016 | 34.55 | 40.17 | 43.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.28 | i | |||
2017 | ----- | z | 42.39 | 39.50 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.39 | k | |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.60 | p | ----- | z | ----- | z | 44.34 | b | ----- | z | ----- | z | 44.34 | k |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.11 | 35.88 | 39.18 | 44.52 | 52.04 | 60.91 | 70.29 | 69.72 | 62.55 | 50.31 | 38.46 | 33.34 | 49.16 | |||||||||||||
S.D. | 3.42 | 3.96 | 2.75 | 3.20 | 3.06 | 3.28 | 2.57 | 2.85 | 3.36 | 3.53 | 3.00 | 3.04 | 1.47 | |||||||||||||
SKEW | 0.39 | 0.04 | 0.56 | 1.31 | 0.15 | -0.21 | 0.05 | 1.16 | 0.56 | 0.88 | 0.23 | 0.93 | -0.32 | |||||||||||||
MAX | 44.53 | 47.08 | 49.03 | 58.48 | 59.35 | 67.50 | 75.45 | 82.48 | 75.83 | 64.58 | 49.10 | 45.20 | 51.85 | |||||||||||||
MIN | 23.39 | 26.31 | 33.52 | 39.40 | 45.68 | 52.59 | 65.42 | 64.45 | 54.20 | 41.77 | 30.33 | 26.87 | 46.20 | |||||||||||||
YRS | 57 | 65 | 67 | 64 | 65 | 66 | 65 | 61 | 60 | 63 | 58 | 59 | 37 |