YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 40.81 | b | 40.81 | k |
1936 | 44.29 | 36.61 | b | 45.40 | 53.73 | 59.44 | 62.62 | 65.48 | 64.63 | 59.68 | 54.44 | 40.74 | a | 41.18 | 52.35 | |||||||||||
1937 | 29.34 | 38.30 | 45.98 | 46.27 | 54.13 | 60.80 | 64.32 | a | 63.08 | 60.20 | 54.94 | 47.27 | 41.93 | a | 50.55 | |||||||||||
1938 | 39.16 | 40.29 | 43.89 | 49.57 | 54.98 | 60.93 | 67.00 | 62.05 | a | 64.05 | 53.40 | 42.03 | 40.24 | 51.47 | ||||||||||||
1939 | 41.13 | 38.70 | 45.34 | 50.73 | 55.61 | 57.57 | 65.68 | 65.47 | 61.68 | 53.08 | 45.17 | 43.23 | 51.95 | |||||||||||||
1940 | 39.42 | 44.71 | 47.60 | 51.02 | 57.16 | 61.78 | 64.32 | 66.05 | 62.82 | 55.03 | 42.85 | 41.94 | 52.89 | |||||||||||||
1941 | 40.92 | 44.32 | 49.03 | 50.78 | 54.67 | a | 59.10 | 68.23 | 65.19 | 58.17 | 51.65 | 45.30 | 41.39 | 52.40 | ||||||||||||
1942 | 35.58 | 41.27 | 43.29 | 48.93 | 53.55 | 57.30 | 65.89 | 66.53 | 61.48 | 53.65 | 44.15 | 42.73 | 51.20 | |||||||||||||
1943 | 33.24 | 42.29 | 43.68 | 50.77 | 52.31 | 57.93 | 64.10 | 63.05 | 63.03 | 53.26 | 44.20 | 38.66 | 50.54 | |||||||||||||
1944 | 37.26 | 40.69 | 43.24 | 47.62 | 53.26 | 58.45 | 64.69 | 63.84 | 62.82 | 55.34 | 43.37 | 37.95 | 50.71 | |||||||||||||
1945 | 41.02 | 42.75 | 41.53 | 47.14 | a | 56.40 | 58.83 | 65.39 | 64.76 | 58.52 | 52.34 | 44.55 | b | 40.52 | 51.15 | |||||||||||
1946 | 38.47 | a | 41.36 | 44.10 | 48.70 | 56.00 | 57.88 | 65.06 | 65.71 | 59.60 | 49.21 | 42.21 | a | 41.27 | 50.80 | |||||||||||
1947 | 35.68 | 44.23 | 47.55 | 51.78 | 58.29 | 59.00 | a | 62.97 | 62.18 | a | 61.83 | 53.61 | 46.12 | 41.10 | 52.03 | |||||||||||
1948 | ----- | z | 39.41 | 41.48 | 45.42 | 53.98 | ----- | z | 60.78 | b | 60.31 | 58.36 | a | 50.16 | 42.15 | 35.35 | a | 48.74 | b | |||||||
1949 | 28.87 | d | 39.25 | 46.81 | b | 52.95 | 57.65 | 63.65 | 65.57 | a | 63.83 | d | 61.71 | b | 49.34 | 45.30 | 39.76 | 51.22 | ||||||||
1950 | 28.92 | 41.13 | a | 43.97 | b | 47.38 | 53.75 | c | 59.40 | a | 63.73 | a | 65.56 | 60.82 | 50.15 | 45.03 | 45.56 | 50.45 | ||||||||
1951 | 37.38 | c | 42.56 | b | 40.63 | a | 52.15 | 55.32 | a | 62.95 | b | 64.72 | b | 63.77 | a | 63.30 | 52.89 | 44.72 | 37.65 | a | 51.50 | |||||
1952 | 36.15 | a | 39.09 | 43.24 | 50.97 | a | 54.87 | 58.22 | c | 67.43 | d | 66.50 | h | 65.48 | 59.06 | 38.26 | k | 39.65 | 51.42 | b | ||||||
1953 | 44.81 | 42.09 | 43.75 | c | 47.53 | 53.02 | b | 55.74 | c | 64.18 | a | 64.05 | a | 62.97 | a | 53.62 | e | 46.72 | 41.90 | a | 51.70 | |||||
1954 | 39.07 | a | 42.65 | a | 43.09 | b | 49.17 | 56.14 | b | 56.98 | a | 61.76 | 61.87 | a | 59.24 | a | 51.58 | a | 48.33 | a | 40.45 | b | 50.86 | |||
1955 | 38.36 | b | 39.81 | a | 41.36 | c | 44.50 | 51.66 | c | 59.50 | 61.34 | c | 63.96 | c | 60.84 | a | 52.47 | b | 43.32 | b | 40.02 | 49.76 | ||||
1956 | 40.29 | 35.88 | 43.41 | b | 51.02 | 59.09 | c | 57.59 | c | 66.82 | a | 64.02 | a | 61.40 | 51.21 | b | 42.19 | a | 39.92 | a | 51.07 | |||||
1957 | 32.71 | b | 42.86 | c | 46.25 | c | 50.00 | e | 57.20 | c | 61.13 | 63.23 | a | 62.82 | 65.80 | 52.67 | b | 43.83 | c | 43.06 | 51.80 | |||||
1958 | 42.50 | 47.96 | 44.18 | 49.60 | a | 59.34 | 63.30 | 69.81 | 68.81 | 61.97 | 55.10 | 46.07 | a | 44.95 | 54.47 | |||||||||||
1959 | 41.82 | 41.74 | a | 45.09 | b | 50.60 | 53.05 | 60.29 | a | 66.72 | a | 63.42 | a | 58.98 | 54.16 | 44.98 | a | 39.56 | 51.70 | |||||||
1960 | 35.84 | 41.98 | 44.87 | 49.93 | 53.26 | 62.08 | 66.89 | 63.35 | 62.15 | 54.30 | a | 45.08 | 39.52 | a | 51.60 | |||||||||||
1961 | 43.78 | a | 45.57 | a | 46.23 | 49.47 | 54.95 | 64.13 | 66.52 | 68.56 | 58.93 | 53.35 | 42.18 | 40.26 | 52.83 | |||||||||||
1962 | 36.73 | a | 41.20 | a | 42.85 | a | 51.52 | a | 51.18 | 59.41 | a | 64.26 | b | 63.23 | 59.03 | 50.62 | a | 47.12 | a | 43.73 | 50.91 | |||||
1963 | 34.32 | 47.96 | 44.64 | b | 48.22 | a | 55.78 | a | 59.79 | a | 62.58 | 65.92 | 64.41 | a | 53.32 | ----- | z | 39.53 | a | 52.41 | a | |||||
1964 | ----- | z | ----- | z | 42.85 | 48.50 | ----- | z | ----- | z | ----- | z | ----- | z | 60.20 | ----- | z | 42.81 | a | 40.87 | a | 47.05 | g | |||
1965 | 39.60 | 43.82 | 48.55 | b | 51.53 | 53.29 | 60.12 | 66.66 | 67.10 | 61.15 | 56.18 | a | 48.08 | 37.39 | 52.79 | |||||||||||
1966 | 40.88 | a | 41.67 | a | 44.69 | 50.28 | 56.40 | 60.60 | a | 64.52 | 65.77 | 62.37 | 53.25 | a | 47.73 | 43.39 | 52.63 | |||||||||
1967 | 43.33 | a | 43.59 | a | 44.03 | 45.13 | 55.16 | 63.98 | 66.10 | 70.92 | 65.62 | a | 53.39 | c | 43.98 | ----- | z | 54.11 | a | |||||||
1968 | 39.68 | 48.39 | b | 47.63 | a | 47.29 | a | 54.29 | 60.67 | 66.05 | 63.40 | 60.88 | 51.16 | c | 45.07 | b | 38.15 | a | 51.89 | |||||||
1969 | 34.56 | 39.36 | 46.66 | 48.60 | 58.84 | b | 64.90 | 63.67 | a | 62.95 | 61.17 | 51.53 | 44.55 | a | 41.52 | c | 51.53 | |||||||||
1970 | 41.58 | 45.67 | a | 46.15 | a | 46.70 | 55.45 | 63.27 | 66.19 | 64.61 | 58.93 | 51.92 | 44.98 | b | 38.66 | b | 52.01 | |||||||||
1971 | 39.45 | a | 40.68 | 42.29 | 48.55 | 56.55 | a | 56.14 | a | 66.10 | 68.06 | 59.35 | 50.81 | 44.62 | 39.05 | a | 50.97 | |||||||||
1972 | 38.58 | 42.75 | a | 48.11 | 46.08 | 57.23 | 61.53 | a | 68.50 | 68.27 | 58.10 | a | 52.45 | 45.83 | a | 34.48 | 51.83 | |||||||||
1973 | 36.98 | b | 44.31 | b | 44.72 | a | 49.88 | 57.00 | 62.03 | 66.95 | 62.87 | 62.45 | 52.29 | 42.50 | 43.08 | 52.09 | ||||||||||
1974 | 37.32 | 40.98 | 45.72 | a | 49.37 | 53.18 | 62.40 | a | 66.00 | 66.63 | a | 66.25 | 54.06 | 45.08 | 43.31 | 52.52 | ||||||||||
1975 | 42.00 | 42.02 | 43.98 | 46.03 | 55.60 | 59.32 | 64.90 | 62.66 | 64.13 | 53.13 | 43.46 | b | 43.08 | a | 51.69 | |||||||||||
1976 | 41.74 | 41.43 | 44.37 | 48.31 | a | 55.42 | 58.28 | a | 64.18 | a | 63.16 | b | 63.45 | 53.34 | 46.91 | a | 38.37 | 51.58 | ||||||||
1977 | 37.97 | 44.52 | b | 44.13 | 51.14 | a | 52.10 | 61.87 | 65.10 | b | 69.81 | 59.58 | 52.47 | 42.16 | a | 41.16 | b | 51.83 | ||||||||
1978 | 39.83 | a | 44.11 | 49.15 | 49.85 | 54.32 | 63.03 | a | 65.74 | 65.06 | 58.75 | 54.21 | 38.87 | 34.38 | b | 51.44 | ||||||||||
1979 | 32.76 | 42.82 | 48.79 | 51.63 | 57.60 | a | 62.92 | 71.06 | n | 65.45 | 63.33 | a | 56.34 | c | 43.12 | 43.06 | d | 51.62 | a | |||||||
1980 | 35.45 | a | 42.78 | b | 44.93 | b | 51.93 | a | 54.84 | 57.09 | a | 66.26 | 62.45 | a | 61.75 | b | 52.88 | f | 46.35 | 41.86 | b | 51.43 | a | |||
1981 | 41.12 | a | 42.59 | 46.33 | j | 49.41 | n | 53.90 | p | 58.91 | a | 65.26 | d | 64.35 | g | 61.79 | b | 51.11 | m | 45.30 | g | 41.65 | a | 51.89 | f | |
1982 | 36.72 | h | 40.98 | b | 44.19 | b | 46.81 | c | 55.46 | d | 62.52 | f | 63.58 | g | 64.14 | c | 61.79 | a | 54.29 | 42.67 | a | 40.91 | b | 50.14 | c | |
1983 | 43.58 | 46.18 | 48.95 | 50.73 | 57.57 | b | 59.98 | 62.95 | a | 66.89 | 59.43 | 52.88 | c | 48.18 | 34.71 | c | 52.67 | |||||||||
1984 | 42.29 | c | 44.63 | b | 49.58 | 48.32 | b | 54.06 | 59.08 | 66.33 | a | 65.70 | a | 61.05 | a | 51.29 | 44.80 | c | 38.05 | c | 52.10 | |||||
1985 | 37.47 | a | 39.44 | a | 42.95 | 52.13 | ----- | z | 61.68 | 69.87 | 65.18 | 59.05 | 51.85 | a | 38.05 | a | 33.90 | a | 50.14 | a | ||||||
1986 | 43.69 | 43.70 | 50.44 | 49.42 | 56.52 | d | 65.10 | a | 63.40 | 69.71 | 58.87 | 55.16 | b | 44.93 | b | 40.30 | a | 53.44 | ||||||||
1987 | 39.35 | 43.89 | 47.18 | 53.60 | 58.23 | 64.31 | a | 64.37 | 67.63 | 63.85 | 58.57 | a | 46.40 | a | 37.75 | a | 53.76 | |||||||||
1988 | 38.52 | a | 44.32 | a | 46.07 | c | 51.19 | a | 53.79 | 59.18 | b | 66.58 | 66.23 | 62.07 | b | 57.27 | c | 45.33 | 39.29 | 52.49 | ||||||
1989 | 41.28 | b | 36.61 | a | 44.73 | 54.00 | a | 55.58 | 62.27 | b | 64.23 | 64.42 | 65.45 | a | 52.85 | 45.31 | a | 36.98 | b | 51.98 | ||||||
1990 | 40.64 | c | 39.98 | a | 47.03 | 52.14 | a | 54.47 | 61.35 | 68.40 | 67.79 | 65.33 | 51.16 | 46.52 | a | 34.09 | c | 52.41 | ||||||||
1991 | 39.47 | a | 47.30 | 44.07 | b | 49.12 | a | 52.50 | 58.28 | a | 67.18 | 67.02 | a | 66.60 | 55.67 | a | 46.74 | a | 40.81 | 52.90 | ||||||
1992 | 42.92 | 48.59 | a | 51.79 | c | 53.37 | 59.97 | 64.28 | a | 67.68 | a | 69.15 | a | 61.71 | a | 55.41 | c | 45.02 | b | 38.65 | e | 54.88 | ||||
1993 | 36.10 | b | 39.25 | d | 48.69 | b | 50.60 | a | 59.52 | e | 59.50 | e | 61.90 | b | 67.30 | a | 63.91 | b | 56.80 | a | 39.63 | 40.46 | c | 51.97 | ||
1994 | 44.30 | c | 42.28 | a | 49.90 | a | 52.50 | c | 58.35 | e | 58.50 | h | 68.65 | e | 65.68 | a | 65.31 | a | 52.04 | c | 40.55 | a | 41.88 | e | 52.86 | a |
1995 | 44.24 | d | 45.67 | g | 47.21 | 49.95 | b | 57.84 | b | 63.73 | d | 68.78 | a | 64.82 | c | 65.50 | 53.21 | b | 50.73 | 41.66 | 55.24 | a | ||||
1996 | 40.97 | 42.75 | e | 49.05 | c | 53.02 | 52.71 | b | 59.43 | b | 69.55 | 67.63 | a | 59.65 | 52.52 | 44.09 | c | 40.74 | b | 52.68 | ||||||
1997 | 40.33 | e | 43.08 | b | 46.12 | c | 49.70 | b | 60.43 | b | 60.11 | b | 65.63 | 69.44 | 64.24 | a | 51.97 | a | 47.80 | c | 38.80 | a | 53.14 | |||
1998 | 42.33 | a | 44.50 | b | 46.62 | a | 49.62 | 53.98 | b | 60.31 | d | 68.93 | a | 68.15 | 64.28 | 52.16 | c | 46.69 | c | 38.44 | 53.00 | |||||
1999 | 40.78 | a | 41.93 | 43.94 | 50.08 | 53.23 | a | 59.02 | 64.69 | 66.97 | 63.27 | 54.48 | a | 47.98 | a | 42.02 | a | 52.37 | ||||||||
2000 | 40.36 | c | 43.23 | a | 44.45 | 52.75 | 55.69 | b | 63.07 | 65.41 | b | 65.24 | 62.71 | a | 54.37 | 41.26 | a | 39.87 | 52.37 | |||||||
2001 | 40.73 | a | 42.59 | a | 47.88 | c | 48.10 | 57.83 | a | 58.98 | 64.77 | 66.79 | b | 63.48 | 53.37 | 46.74 | c | 41.09 | d | 52.70 | ||||||
2002 | 40.55 | 43.60 | b | 43.28 | b | 50.37 | 54.08 | a | 61.03 | a | 67.65 | d | 66.82 | a | 63.08 | 53.87 | 47.33 | a | 42.74 | 52.87 | ||||||
2003 | 45.20 | a | 43.54 | a | 48.73 | 49.25 | 56.67 | a | 64.43 | 68.79 | 68.17 | b | 65.73 | 58.18 | 44.47 | a | 42.41 | c | 54.63 | |||||||
2004 | 38.62 | c | 44.12 | a | 50.08 | 53.52 | b | 57.88 | a | 63.75 | 69.23 | a | 69.53 | a | 62.03 | 56.09 | b | 44.00 | b | 42.82 | c | 54.31 | ||||
2005 | 42.53 | 43.68 | 48.81 | 51.16 | b | 59.10 | 59.72 | 68.56 | 69.13 | 61.07 | 54.64 | b | 42.65 | 38.92 | 53.33 | |||||||||||
2006 | 43.28 | a | 42.14 | 45.16 | 51.30 | b | 58.24 | 64.13 | 68.76 | f | 66.05 | i | 63.98 | i | 52.91 | h | 45.04 | b | 39.48 | d | 48.60 | d | ||||
2007 | 38.18 | c | 44.57 | a | 48.83 | g | 49.15 | g | 56.46 | f | 59.95 | h | 68.41 | h | 66.42 | l | 62.26 | e | 51.88 | e | 43.00 | d | 40.81 | g | 47.98 | g |
2008 | 36.92 | g | 43.07 | b | 43.42 | f | 45.48 | f | 57.61 | i | 58.33 | l | 67.22 | h | 67.70 | k | 63.42 | f | 52.95 | j | 48.76 | i | 36.08 | e | 39.58 | j |
2009 | 39.87 | h | 40.67 | b | 43.79 | g | 49.22 | e | 57.09 | d | 61.88 | 68.56 | 65.56 | 62.88 | 52.40 | 45.03 | 35.77 | 53.91 | b | |||||||
2010 | 44.52 | 45.61 | 46.56 | 48.42 | 52.68 | 57.80 | 64.79 | 65.00 | 62.12 | 52.55 | 44.12 | 41.92 | 52.17 | |||||||||||||
2011 | 39.84 | 39.09 | 45.03 | 45.60 | 51.45 | 58.38 | 63.61 | 66.65 | 65.35 | 53.34 | 42.98 | 36.77 | 50.67 | |||||||||||||
2012 | 40.15 | 42.60 | 42.77 | 51.18 | 55.18 | 57.97 | 64.05 | 66.76 | 63.38 | 55.50 | 46.92 | 41.50 | 52.33 | |||||||||||||
2013 | 36.87 | 43.04 | ----- | z | 50.37 | 58.65 | 61.82 | 66.66 | 68.24 | 62.65 | 51.98 | 44.43 | 34.94 | 52.69 | a | |||||||||||
2014 | 39.98 | 41.38 | 48.65 | 50.77 | 58.50 | 60.40 | 70.79 | 70.31 | 66.18 | 58.63 | 45.65 | 43.74 | 54.58 | |||||||||||||
2015 | 41.82 | 47.07 | 49.89 | 49.23 | 57.02 | 65.80 | 69.73 | 68.40 | 61.18 | 58.18 | 44.25 | 42.71 | 54.61 | |||||||||||||
2016 | 41.34 | 46.93 | 48.05 | 55.38 | 58.92 | 62.85 | 65.66 | 68.90 | 61.80 | 54.39 | 49.50 | 35.87 | 54.13 | |||||||||||||
2017 | 34.29 | 41.54 | 46.97 | 49.50 | 58.03 | 62.70 | 67.10 | 71.02 | 65.40 | 53.53 | 46.12 | 39.35 | 52.96 | |||||||||||||
2018 | 44.39 | 41.48 | 44.48 | 51.40 | 58.52 | 61.53 | 69.74 | 68.31 | 60.97 | 55.44 | 46.90 | 41.68 | 53.74 | |||||||||||||
2019 | 41.66 | 37.32 | 45.02 | 52.20 | 57.85 | 62.52 | 66.47 | 69.26 | 61.77 | 49.97 | 45.47 | 41.10 | 52.55 | |||||||||||||
2020 | 44.29 | 42.59 | 44.53 | 51.70 | 57.56 | 61.50 | 66.84 | 67.06 | 64.67 | 53.98 | 43.57 | 41.16 | 53.29 | |||||||||||||
2021 | 42.56 | 40.91 | 43.10 | 51.28 | 55.66 | 65.48 | 69.26 | 69.60 | 64.38 | 52.73 | 48.78 | 40.56 | 53.69 | |||||||||||||
2022 | 41.13 | 42.54 | 48.18 | 47.13 | 53.18 | 62.08 | 69.61 | 70.32 | 66.08 | 59.08 | 41.63 | 39.44 | 53.37 | |||||||||||||
2023 | 41.52 | 38.36 | 41.60 | 48.92 | 61.50 | 62.90 | 69.08 | 71.79 | 63.23 | 55.40 | 45.67 | 45.06 | 53.75 | |||||||||||||
2024 | 41.97 | 43.74 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.85 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.57 | 42.45 | 45.67 | 49.92 | 55.89 | 60.88 | 66.06 | 66.12 | 62.24 | 53.61 | 44.74 | 40.13 | 52.32 | |||||||||||||
S.D. | 3.60 | 2.65 | 2.48 | 2.22 | 2.36 | 2.38 | 2.23 | 2.54 | 2.27 | 2.18 | 2.33 | 2.63 | 1.15 | |||||||||||||
SKEW | -0.95 | 0.01 | 0.26 | -0.21 | 0.06 | 0.03 | -0.01 | 0.11 | 0.02 | 0.57 | -0.27 | -0.52 | 0.28 | |||||||||||||
MAX | 45.20 | 48.59 | 51.79 | 55.38 | 61.50 | 65.80 | 70.79 | 71.79 | 66.60 | 59.08 | 50.73 | 45.56 | 54.88 | |||||||||||||
MIN | 28.87 | 35.88 | 40.63 | 44.50 | 51.18 | 55.74 | 60.78 | 60.31 | 58.10 | 49.21 | 38.05 | 33.90 | 49.76 | |||||||||||||
YRS | 84 | 87 | 83 | 85 | 83 | 82 | 82 | 82 | 86 | 83 | 84 | 87 | 71 |