YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 31.40 | u | 37.96 | 43.52 | 54.03 | 53.84 | 61.47 | 65.32 | 66.16 | 57.03 | 55.40 | a | 43.53 | 34.65 | 52.08 | a | ||||||||||
1936 | 33.19 | 35.57 | h | 42.74 | 49.30 | 58.55 | 65.90 | 66.77 | 65.90 | b | 58.44 | c | 50.74 | 39.93 | 35.77 | 51.57 | a | |||||||||
1937 | 30.26 | 33.75 | l | ----- | z | 51.37 | 60.00 | a | 63.33 | 65.84 | 66.65 | 62.13 | 53.39 | 41.30 | 36.39 | 53.06 | b | |||||||||
1938 | 35.10 | 40.82 | 34.90 | 49.10 | 56.52 | 64.07 | 65.26 | 67.94 | 62.20 | 54.52 | 39.72 | a | 37.13 | 50.61 | ||||||||||||
1939 | 36.13 | 30.61 | 43.77 | 51.90 | 59.90 | 66.43 | 66.13 | 64.16 | 62.27 | 51.90 | 39.22 | g | 41.42 | 52.24 | a | |||||||||||
1940 | 28.13 | 36.10 | 44.23 | 48.17 | 56.65 | 60.77 | 66.42 | 63.16 | 60.67 | 48.52 | 41.63 | 41.39 | 49.65 | |||||||||||||
1941 | 37.68 | 39.89 | 39.03 | 49.70 | 58.10 | 61.30 | 65.10 | 66.48 | 59.53 | 53.19 | 43.60 | 37.10 | 50.89 | |||||||||||||
1942 | 33.65 | 31.78 | a | 39.68 | 48.90 | a | 55.06 | 64.45 | a | 65.13 | 63.06 | 57.33 | 50.70 | a | 44.73 | 38.16 | 49.39 | |||||||||
1943 | 35.61 | 35.86 | 39.03 | 54.23 | 56.65 | 64.33 | 66.45 | 68.52 | 60.03 | 50.00 | 40.28 | a | 30.58 | 50.13 | ||||||||||||
1944 | 32.39 | 35.34 | 37.45 | b | 45.38 | a | 56.65 | 62.93 | 66.61 | 64.00 | a | 56.73 | 48.52 | 41.00 | o | 30.53 | p | 50.60 | b | |||||||
1945 | 34.97 | 37.64 | 43.40 | a | 44.89 | b | 57.42 | 64.20 | 63.33 | a | 66.87 | 60.83 | 49.03 | 43.83 | 33.42 | 49.99 | ||||||||||
1946 | 28.67 | a | 33.07 | 42.29 | 53.57 | 53.81 | 61.96 | c | 66.68 | 68.70 | k | 65.56 | n | 56.61 | 44.24 | e | 40.58 | e | 48.15 | b | ||||||
1947 | 31.10 | 29.64 | 36.45 | 46.63 | 57.39 | 66.93 | 69.03 | 65.13 | 63.70 | 58.13 | 39.17 | 35.55 | 49.90 | |||||||||||||
1948 | 26.04 | c | 33.48 | 37.19 | 55.53 | 58.58 | 68.59 | a | 67.68 | 68.45 | 63.21 | a | 53.68 | 40.57 | 40.61 | 51.13 | ||||||||||
1949 | 26.29 | 39.11 | 42.55 | 46.70 | 60.35 | 64.57 | 68.06 | 66.29 | 60.87 | 52.16 | 50.00 | e | 36.71 | 51.14 | ||||||||||||
1950 | 40.17 | b | 43.86 | 44.58 | 52.80 | 58.35 | 66.23 | 65.43 | a | 65.14 | b | 60.97 | 58.52 | b | 39.88 | e | 39.52 | 52.95 | ||||||||
1951 | 34.45 | 37.93 | 42.32 | 47.67 | 57.41 | b | 66.07 | b | 70.30 | a | 68.19 | 62.93 | 55.35 | 41.80 | 39.18 | c | 51.97 | |||||||||
1952 | 42.10 | 39.97 | 39.71 | 48.93 | a | 58.81 | 66.83 | 65.48 | 71.19 | 61.50 | 54.13 | 38.67 | 35.84 | 51.93 | ||||||||||||
1953 | 42.71 | 36.64 | 47.29 | 48.73 | 57.71 | 70.87 | 69.00 | 67.52 | 62.60 | 53.94 | 43.93 | 29.94 | 52.57 | |||||||||||||
1954 | 40.32 | 43.54 | 42.65 | 55.13 | 53.81 | 64.57 | 67.94 | 66.45 | 65.50 | 54.68 | 44.70 | 38.74 | 53.17 | |||||||||||||
1955 | 33.83 | a | 35.39 | 45.48 | 54.00 | 58.29 | 64.50 | 65.84 | 67.32 | 63.37 | 56.52 | 42.41 | a | 41.23 | 52.35 | |||||||||||
1956 | 39.00 | 35.69 | 44.35 | 48.50 | 61.06 | 68.63 | 68.52 | 67.90 | 63.70 | 55.81 | 41.47 | 39.77 | 52.87 | |||||||||||||
1957 | 35.68 | 45.39 | 41.90 | 47.23 | 54.03 | 64.93 | 68.39 | 68.23 | 61.20 | 51.19 | ----- | z | 40.32 | 52.59 | a | |||||||||||
1958 | 33.58 | 35.71 | 35.94 | 46.47 | 59.06 | 67.30 | 68.35 | 68.29 | 60.60 | 51.29 | 42.57 | 35.19 | 50.36 | |||||||||||||
1959 | 35.16 | 36.39 | 42.16 | 49.97 | 59.35 | 65.61 | b | 65.10 | 66.81 | 64.63 | 52.84 | 37.60 | 38.13 | 51.15 | ||||||||||||
1960 | 31.97 | 29.61 | a | 39.23 | a | 50.03 | 58.71 | 67.40 | 66.52 | 66.71 | 62.50 | 52.19 | 43.67 | 29.42 | 49.83 | |||||||||||
1961 | 31.13 | 36.61 | 42.35 | 47.93 | 59.26 | 63.20 | 63.90 | 63.90 | 58.66 | a | 52.58 | 37.03 | 36.65 | 49.43 | ||||||||||||
1962 | 30.32 | 43.33 | a | 40.89 | d | 50.22 | c | 57.44 | d | 61.30 | 63.45 | 66.65 | 61.37 | 56.29 | 44.77 | 36.68 | 51.06 | |||||||||
1963 | 27.39 | 39.32 | 43.81 | 55.07 | 57.58 | 62.17 | 67.68 | 64.06 | 60.68 | b | 57.97 | 44.28 | a | 31.20 | a | 50.93 | ||||||||||
1964 | 33.13 | a | 30.11 | a | 39.97 | a | 51.79 | a | 58.48 | 60.87 | 68.00 | 68.81 | 61.20 | 53.71 | 42.77 | 36.58 | 50.45 | |||||||||
1965 | 38.77 | 32.46 | 36.16 | 54.07 | 58.06 | 64.40 | 68.48 | 65.81 | 61.87 | 51.71 | 47.90 | 39.81 | 51.63 | |||||||||||||
1966 | 30.45 | 33.79 | 44.00 | 49.10 | 58.06 | 63.10 | 71.16 | 64.13 | 61.93 | b | 53.00 | b | 48.63 | 37.13 | 51.21 | |||||||||||
1967 | 37.39 | 37.86 | 50.10 | 55.70 | 58.97 | 64.73 | 68.23 | 65.06 | 59.30 | 54.26 | 44.57 | b | 31.87 | 52.34 | ||||||||||||
1968 | 36.00 | 36.14 | a | 41.43 | a | 48.59 | a | 58.76 | b | 65.10 | 65.55 | b | 64.87 | 58.83 | 53.16 | 39.60 | 36.16 | 50.35 | ||||||||
1969 | 38.97 | 37.75 | 33.19 | 50.83 | 56.06 | 64.43 | 68.90 | 68.39 | 61.37 | 49.16 | 41.27 | 35.84 | 50.51 | |||||||||||||
1970 | 30.06 | 36.50 | 37.16 | 50.13 | 56.26 | 62.37 | 66.10 | 66.74 | 57.37 | 45.77 | 42.17 | 39.87 | 49.21 | |||||||||||||
1971 | 36.00 | 31.71 | 42.39 | 46.73 | 56.71 | 63.43 | 64.03 | a | 60.55 | 58.40 | 51.87 | 44.60 | 35.94 | 49.36 | ||||||||||||
1972 | ----- | z | 34.48 | 45.81 | 52.60 | 57.43 | a | 65.70 | 64.39 | 63.16 | 61.53 | 51.65 | 34.50 | b | 35.68 | 51.54 | a | |||||||||
1973 | 31.52 | 32.46 | 41.13 | 43.83 | 55.68 | 62.27 | 64.65 | 66.06 | 58.77 | 50.96 | g | ----- | z | 37.61 | 49.40 | b | ||||||||||
1974 | 29.55 | ----- | z | 45.20 | a | 49.37 | 61.16 | 63.79 | a | 66.10 | 61.52 | 53.67 | 50.19 | 39.79 | a | 34.45 | 50.44 | a | ||||||||
1975 | 30.16 | 33.43 | 39.20 | a | 47.41 | a | 54.55 | 59.50 | j | 60.07 | a | 64.71 | 57.28 | a | 54.10 | a | 35.84 | k | 28.18 | n | 48.99 | c | ||||
1976 | 33.43 | c | ----- | z | 43.26 | 51.28 | a | 54.35 | 62.80 | 62.26 | 64.87 | 58.00 | 45.10 | 35.18 | b | 33.41 | b | 49.45 | a | |||||||
1977 | 29.19 | 36.93 | a | 40.80 | a | 49.40 | 58.93 | b | 64.87 | 66.77 | a | 66.58 | 65.38 | a | 53.63 | a | 42.38 | a | 34.10 | a | 50.75 | |||||
1978 | 28.45 | 29.89 | a | 37.35 | k | 47.45 | a | 57.77 | a | 64.27 | 68.39 | 65.19 | 58.79 | b | 50.68 | 42.52 | a | 31.84 | 49.57 | a | ||||||
1979 | 26.29 | 34.25 | 42.00 | 48.76 | a | 54.32 | 62.17 | 64.55 | 62.52 | 61.03 | 54.55 | 37.24 | a | 36.68 | 48.70 | |||||||||||
1980 | 35.13 | 36.48 | 39.48 | 46.00 | 55.71 | 68.90 | 70.20 | a | 65.83 | a | 61.17 | 50.07 | a | 40.28 | a | 38.16 | 50.62 | |||||||||
1981 | 36.37 | a | 38.57 | 41.06 | 52.10 | 56.90 | 63.40 | 64.61 | 62.68 | 59.20 | 51.48 | 46.90 | a | 38.13 | 50.95 | |||||||||||
1982 | 29.93 | c | 34.41 | a | 45.07 | b | 49.54 | b | 54.21 | c | 60.16 | e | 65.10 | b | 65.39 | 60.64 | e | 47.31 | e | 39.31 | d | 30.75 | c | 48.48 | ||
1983 | 32.57 | h | 36.00 | g | 39.67 | d | 42.17 | f | 53.42 | e | 59.81 | d | 62.61 | h | 65.31 | b | 57.89 | c | 50.86 | b | 43.33 | c | 26.86 | b | 49.64 | d |
1984 | 30.59 | d | 37.67 | e | 40.81 | d | 47.63 | c | 59.11 | d | 62.97 | 64.83 | a | 64.10 | 57.18 | b | 47.21 | c | 41.12 | e | 35.35 | h | 50.29 | a | ||
1985 | 26.05 | j | 31.73 | f | 42.88 | f | 52.08 | f | 58.34 | b | 62.79 | a | 66.00 | d | 67.33 | a | 58.31 | a | 49.33 | a | 41.50 | 31.54 | c | 54.39 | d | |
1986 | 36.62 | b | 40.42 | d | 46.46 | e | 52.22 | c | 57.00 | b | 60.17 | a | 65.06 | 63.50 | c | 58.63 | 49.14 | c | 38.22 | c | 34.10 | a | 50.13 | |||
1987 | 33.62 | e | 38.33 | a | 38.10 | a | 45.90 | a | 55.63 | a | 62.00 | c | 64.97 | a | 64.58 | 59.48 | a | 51.19 | e | 40.83 | a | 33.17 | a | 48.98 | ||
1988 | 29.81 | 32.90 | 40.48 | 47.43 | b | 54.10 | a | 64.90 | 63.90 | 63.66 | b | 59.52 | a | 50.74 | 46.03 | 34.36 | f | 50.32 | a | |||||||
1989 | 35.88 | e | 32.68 | 44.74 | d | 49.33 | 59.70 | a | 60.72 | a | 65.33 | a | 63.39 | 55.93 | 52.65 | 45.00 | 29.03 | 49.53 | ||||||||
1990 | 35.52 | 40.00 | a | 41.66 | b | 48.43 | 57.65 | 68.93 | 62.03 | 62.65 | 60.70 | 48.35 | 43.03 | 35.53 | a | 50.37 | ||||||||||
1991 | 29.72 | b | 38.93 | 43.10 | 52.38 | a | 58.50 | a | 62.30 | 62.69 | e | 63.71 | 55.91 | h | 53.23 | a | 37.28 | e | 35.20 | f | 50.18 | b | ||||
1992 | 32.00 | g | 39.82 | a | 44.27 | a | 47.97 | 54.62 | b | 62.73 | 65.45 | 62.32 | 60.93 | 54.53 | a | 36.87 | 33.45 | 51.18 | a | |||||||
1993 | 34.27 | e | 34.94 | j | 44.24 | b | 49.79 | b | 58.84 | 63.77 | 66.97 | a | 66.42 | 59.59 | c | 50.68 | f | 36.96 | e | 39.44 | d | 52.03 | b | |||
1994 | 35.00 | a | 37.00 | g | 44.07 | c | 51.00 | a | 57.71 | 70.90 | 69.94 | 67.60 | a | 62.64 | b | 54.38 | b | 45.56 | c | 42.93 | a | 54.70 | a | |||
1995 | 38.43 | a | 43.71 | 44.41 | b | 47.21 | a | 57.97 | a | 62.07 | 68.68 | 65.52 | 59.17 | a | 53.13 | a | 44.07 | b | 36.53 | a | 51.74 | |||||
1996 | 34.10 | 39.07 | 37.73 | a | 51.00 | b | 66.39 | 65.00 | 66.26 | 63.29 | 57.14 | a | 50.07 | b | 40.71 | b | 38.07 | b | 50.74 | |||||||
1997 | 31.65 | 32.22 | a | 43.03 | 42.27 | 55.23 | 62.96 | b | 66.47 | a | 65.97 | a | 61.75 | b | 50.53 | a | 39.53 | 31.10 | a | 48.56 | ||||||
1998 | 37.45 | 35.30 | a | 39.13 | 46.47 | 61.97 | a | 68.17 | a | 66.12 | f | 64.37 | a | 63.17 | a | 52.48 | b | 44.03 | a | 32.33 | a | 49.53 | a | |||
1999 | 36.16 | 41.70 | a | 41.14 | c | 51.00 | c | 58.97 | a | 64.71 | b | 67.27 | a | 70.00 | i | 60.86 | b | 53.45 | b | 48.50 | b | 36.41 | b | 50.92 | a | |
2000 | 39.14 | b | 43.00 | f | 43.77 | a | 52.89 | b | 63.88 | g | 63.32 | e | 69.73 | e | 68.93 | b | 62.52 | c | 49.59 | b | 36.80 | 31.89 | d | 51.86 | b | |
2001 | 30.50 | e | 35.81 | g | 40.25 | g | ----- | z | 62.11 | m | 68.86 | b | 70.70 | a | 67.71 | 60.07 | a | 53.57 | c | 43.18 | b | 36.55 | b | 53.89 | d | |
2002 | 36.38 | b | 33.62 | b | 38.80 | a | 55.08 | f | 60.27 | i | 67.61 | b | 67.80 | a | 69.61 | 62.93 | c | 50.50 | c | 42.50 | 37.67 | a | 50.74 | b | ||
2003 | 36.87 | 35.13 | e | 44.93 | c | 53.67 | c | 60.52 | d | 64.08 | e | 67.91 | h | 68.26 | d | 61.71 | f | 57.96 | g | 45.25 | b | 38.19 | d | 49.65 | c | |
2004 | 36.29 | c | 34.48 | d | 47.54 | c | 50.52 | e | 60.24 | f | 64.09 | h | 66.94 | n | 65.24 | j | 61.58 | k | 52.82 | i | 39.77 | h | 35.08 | g | 42.21 | h |
2005 | 37.58 | e | 36.33 | g | 42.29 | j | 46.80 | t | 55.95 | l | 67.29 | w | 67.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.42 | j | |
2006 | ----- | z | 40.71 | d | 45.74 | ----- | z | 62.90 | 68.69 | d | 69.33 | d | ----- | z | 59.47 | 52.55 | 46.47 | 35.52 | b | 53.49 | c | |||||
2007 | 29.93 | a | ----- | z | 46.93 | a | 48.00 | b | 57.56 | d | ----- | z | 67.23 | a | 67.60 | a | ----- | z | ----- | z | 43.54 | d | ----- | z | 51.54 | e |
2008 | ----- | z | ----- | z | 43.03 | b | 52.53 | 59.69 | b | 70.25 | b | 67.30 | a | 65.48 | 59.20 | 53.03 | 43.59 | a | 31.24 | j | 57.12 | c | ||||
2009 | 35.26 | h | 41.52 | a | 44.19 | 50.80 | 58.38 | b | 66.97 | 68.13 | 68.32 | 59.17 | 50.58 | 45.20 | 31.90 | a | 53.20 | a | ||||||||
2010 | 32.76 | b | 33.44 | a | 39.97 | a | 50.57 | 59.06 | 68.67 | 65.45 | 68.65 | 64.33 | 55.32 | 44.70 | 40.55 | 51.96 | ||||||||||
2011 | 35.03 | 34.71 | 49.97 | 57.23 | 59.84 | 73.21 | b | 72.52 | 73.65 | 65.21 | b | 54.06 | 45.00 | 30.77 | 54.27 | |||||||||||
2012 | 38.52 | 36.69 | 47.00 | 54.83 | 61.42 | 69.80 | 68.90 | a | 75.33 | s | 62.04 | e | 54.59 | n | 48.67 | 43.71 | x | 54.21 | c | |||||||
2013 | 38.25 | w | ----- | z | 40.10 | u | 51.10 | 59.84 | 69.00 | e | 66.74 | 69.16 | 66.06 | l | 52.34 | b | 43.75 | b | 36.56 | d | 56.06 | d | ||||
2014 | 32.66 | b | 36.82 | 38.55 | t | 51.56 | e | 59.45 | 67.03 | 67.38 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.48 | f | |||
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | 44.47 | p | 48.22 | c | 54.35 | 65.10 | 71.48 | 65.03 | 61.07 | 57.77 | 47.07 | 34.39 | 56.05 | c | ||||||||
2017 | 34.77 | 42.18 | 46.84 | 49.60 | 54.81 | 66.27 | 67.90 | 65.32 | 62.43 | 53.50 | c | 46.13 | 37.45 | 52.27 | ||||||||||||
2018 | 33.87 | 34.29 | 47.10 | 48.80 | 65.77 | 68.53 | 71.29 | j | 67.84 | 60.40 | 50.58 | 39.83 | 37.21 | l | 51.70 | b | ||||||||||
2019 | 34.48 | 38.30 | a | 40.74 | 53.20 | 57.32 | 64.23 | 70.16 | 73.06 | 66.17 | 45.94 | 39.17 | 39.68 | 51.87 | ||||||||||||
2020 | 38.94 | 34.28 | 47.13 | 49.20 | 62.73 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.39 | h | ||||
2021 | ----- | z | ----- | z | ----- | z | ----- | z | 58.13 | 67.93 | o | 66.48 | 66.93 | q | ----- | z | ----- | z | ----- | z | ----- | z | 62.31 | j | ||
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.04 | g | 53.10 | 39.57 | 37.26 | 43.31 | i | |||
2023 | 39.26 | 36.68 | 45.00 | 50.67 | 59.39 | ----- | z | 72.71 | 71.16 | 68.47 | 55.77 | 45.77 | 41.55 | 53.31 | a | |||||||||||
2024 | 33.13 | 43.41 | 47.81 | 51.20 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.45 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.98 | 36.62 | 42.35 | 50.00 | 57.86 | 64.93 | 66.79 | 66.12 | 60.74 | 52.32 | 42.35 | 36.02 | 50.83 | |||||||||||||
S.D. | 3.80 | 3.74 | 3.46 | 2.93 | 2.49 | 2.87 | 2.37 | 2.47 | 2.55 | 2.84 | 3.33 | 3.47 | 1.31 | |||||||||||||
SKEW | -0.04 | 0.23 | -0.20 | 0.11 | 0.63 | 0.51 | 0.08 | 0.49 | 0.19 | -0.18 | -0.10 | -0.36 | 0.31 | |||||||||||||
MAX | 42.71 | 45.39 | 50.10 | 57.23 | 66.39 | 73.21 | 72.71 | 73.65 | 68.47 | 58.52 | 50.00 | 42.93 | 54.27 | |||||||||||||
MIN | 26.04 | 29.61 | 33.19 | 42.27 | 53.42 | 59.81 | 60.07 | 60.55 | 53.67 | 45.10 | 34.50 | 26.86 | 48.48 | |||||||||||||
YRS | 77 | 72 | 79 | 80 | 81 | 80 | 81 | 78 | 77 | 78 | 78 | 74 | 46 |