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 | 40.07 | 41.98 | k | 40.07 | k | |
1930 | 22.35 | d | 44.81 | b | ----- | z | ----- | z | 52.02 | 57.98 | 62.06 | ----- | z | ----- | z | ----- | z | 43.53 | ----- | z | 47.13 | f | ||||
1931 | ----- | z | 41.61 | f | 46.39 | i | 52.06 | d | 58.92 | e | 62.11 | c | 66.37 | a | 64.34 | 61.33 | ----- | z | ----- | z | ----- | z | 60.86 | f | ||
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 | 64.44 | v | 65.18 | 62.24 | a | 55.73 | c | 42.07 | 41.52 | 53.35 | g | |||
1941 | 40.72 | a | 44.65 | b | 50.22 | a | 51.10 | a | 54.60 | b | 59.55 | 66.73 | 64.65 | 57.55 | 51.83 | d | 46.50 | 41.87 | a | 52.50 | ||||||
1942 | 34.82 | 41.54 | 44.34 | 50.37 | 53.82 | a | 57.98 | 66.30 | k | ----- | z | 60.25 | p | 53.84 | 44.67 | 42.73 | 47.12 | c | ||||||||
1943 | 33.33 | a | 42.65 | a | 43.73 | 52.87 | 52.24 | b | 57.03 | 62.06 | 62.39 | 61.74 | a | 53.28 | a | 44.52 | 37.61 | 50.29 | ||||||||
1944 | 38.55 | 40.86 | a | 43.15 | 48.33 | 53.18 | 56.88 | 62.32 | a | 63.16 | 62.48 | 57.10 | 44.70 | 38.10 | 50.73 | |||||||||||
1945 | 40.81 | b | 42.98 | b | 43.24 | 47.46 | c | 56.12 | b | 56.96 | b | 63.67 | a | 64.41 | c | 58.18 | 53.09 | b | 44.26 | a | 39.88 | a | 50.92 | |||
1946 | 40.47 | 42.78 | a | 45.12 | a | 49.28 | a | 57.07 | b | 57.90 | 62.58 | a | 63.29 | 57.79 | b | 48.90 | b | 42.67 | 40.27 | c | 50.67 | |||||
1947 | 35.16 | 44.50 | b | 48.69 | b | 50.93 | a | 56.36 | b | 58.60 | 62.17 | d | 61.34 | 59.25 | 50.24 | 45.23 | 41.24 | b | 51.14 | |||||||
1948 | 38.22 | b | 38.79 | a | 42.71 | 45.82 | 52.93 | c | 63.08 | 59.20 | d | 58.58 | 57.00 | c | 49.94 | 40.17 | 34.33 | a | 48.40 | |||||||
1949 | 25.65 | 37.05 | 43.55 | 49.70 | 55.00 | 56.78 | 60.10 | 62.41 | d | 62.55 | k | 46.12 | a | 48.07 | a | 39.04 | c | 47.59 | a | |||||||
1950 | 27.64 | c | 39.04 | 42.19 | 47.21 | b | 52.95 | a | 59.98 | 62.07 | a | 65.39 | 59.53 | a | 50.15 | a | 46.78 | a | 46.69 | 49.97 | ||||||
1951 | 39.19 | 42.30 | 41.07 | c | 50.60 | 53.42 | 60.41 | a | 63.15 | 61.84 | 60.19 | a | 50.32 | 45.45 | 36.98 | 50.41 | ||||||||||
1952 | 36.13 | 41.57 | 42.90 | 49.98 | 54.77 | 56.81 | c | 66.53 | o | 66.54 | c | 65.42 | k | 56.20 | a | 40.63 | 41.92 | 48.75 | b | |||||||
1953 | 46.44 | 42.25 | 44.42 | 48.02 | c | 53.45 | a | 56.50 | 64.21 | 64.97 | 61.65 | 54.70 | a | 48.14 | a | 42.48 | 52.27 | |||||||||
1954 | 38.98 | a | 43.56 | a | 43.18 | 48.60 | a | 55.95 | ----- | z | ----- | z | 61.15 | 58.14 | a | 51.10 | 48.20 | 40.45 | 48.93 | b | ||||||
1955 | 39.16 | 40.89 | a | 41.45 | a | 45.40 | 52.70 | f | 63.55 | t | 60.76 | 61.77 | a | 58.38 | 52.44 | 39.82 | 39.69 | 47.98 | b | |||||||
1956 | 40.24 | 34.88 | 43.02 | 51.50 | 58.27 | 57.02 | 65.37 | a | 63.17 | m | 59.28 | 49.97 | 41.28 | 38.74 | d | 49.05 | a | |||||||||
1957 | 28.93 | a | 39.79 | 45.03 | a | 49.73 | 56.29 | 60.08 | e | 62.76 | d | 61.61 | 64.52 | a | 53.38 | b | 42.97 | 42.92 | 50.67 | |||||||
1958 | 43.03 | a | 48.94 | a | 44.95 | c | 49.70 | c | 60.94 | 63.87 | 68.81 | 68.03 | 60.60 | a | 55.42 | 47.80 | c | 44.54 | c | 54.72 | ||||||
1959 | 40.60 | a | 41.41 | 44.98 | e | 49.85 | 53.32 | a | 60.62 | a | 65.72 | a | 63.16 | i | 58.48 | 53.47 | b | 43.43 | 39.08 | e | 50.09 | a | ||||
1960 | 36.57 | b | 42.02 | a | 45.46 | c | 49.50 | b | 53.18 | 59.05 | 65.45 | 62.35 | a | 59.23 | b | 53.52 | a | 45.63 | d | 38.46 | c | 50.87 | ||||
1961 | 42.85 | 45.85 | b | 45.92 | 47.91 | a | 54.52 | 61.90 | 65.61 | 68.60 | a | 57.48 | a | 51.35 | 41.28 | c | 39.97 | 51.94 | ||||||||
1962 | 36.53 | a | 42.00 | 43.31 | 50.62 | 50.88 | a | 58.63 | 62.77 | 63.50 | 61.02 | a | 53.61 | 47.45 | 41.76 | 51.01 | ||||||||||
1963 | 33.38 | a | 47.09 | a | 44.29 | c | 48.25 | 55.05 | 59.27 | b | 60.41 | i | 63.27 | 63.03 | a | 53.93 | a | 46.27 | b | 39.82 | 50.33 | a | ||||
1964 | 41.35 | 40.84 | a | 42.94 | 45.72 | 51.35 | 57.33 | a | 62.60 | 61.26 | 57.19 | a | 53.06 | 41.19 | d | 37.94 | 49.40 | |||||||||
1965 | 39.85 | 41.70 | 45.55 | c | 49.85 | 51.24 | 57.84 | b | 66.28 | b | 64.93 | d | 57.15 | 54.74 | 47.09 | b | 37.58 | 51.15 | ||||||||
1966 | 38.85 | 40.93 | 44.65 | 50.47 | a | 53.93 | c | 58.62 | 62.35 | 63.69 | 61.40 | 51.13 | 45.78 | 43.50 | a | 51.28 | ||||||||||
1967 | 43.45 | 42.45 | 42.82 | 45.27 | 54.08 | 62.15 | 64.30 | a | 69.18 | 64.05 | 52.92 | 45.13 | 40.16 | 52.16 | ||||||||||||
1968 | 39.03 | b | 46.16 | a | 47.47 | 47.19 | c | 54.21 | 59.18 | 61.87 | 62.13 | 59.73 | 50.55 | 45.02 | 36.92 | 50.79 | ||||||||||
1969 | 31.50 | 39.80 | a | 45.24 | 49.17 | 56.82 | a | 63.73 | 62.79 | 61.17 | a | 60.28 | 50.82 | 45.38 | 41.96 | h | 51.52 | a | ||||||||
1970 | 38.90 | 45.07 | 44.50 | 45.83 | 53.39 | 62.15 | 64.31 | 63.87 | a | 57.10 | 50.44 | 45.95 | 38.27 | 50.81 | ||||||||||||
1971 | 38.34 | 41.46 | a | 41.36 | c | 47.53 | 54.45 | a | 56.22 | 65.24 | 66.27 | 57.78 | 50.06 | 44.82 | 38.48 | a | 50.17 | |||||||||
1972 | 37.34 | 41.62 | 47.95 | 46.75 | 57.94 | 60.58 | 66.80 | u | ----- | z | 58.32 | b | 51.30 | d | 45.00 | 35.03 | a | 48.18 | b | |||||||
1973 | 37.48 | a | 43.15 | a | 45.15 | a | 49.32 | 56.40 | 60.36 | a | 66.18 | a | 61.10 | 61.90 | 52.13 | 43.05 | b | 43.17 | b | 51.62 | ||||||
1974 | 37.15 | a | 41.29 | 46.30 | h | 49.02 | a | 51.67 | a | 61.15 | 61.82 | l | 65.29 | 64.24 | a | 52.24 | ----- | z | 41.79 | 51.54 | c | |||||
1975 | ----- | z | ----- | z | 40.68 | 43.21 | b | 53.73 | e | ----- | z | 62.65 | 59.08 | f | 63.57 | b | 52.11 | 42.65 | c | 41.13 | a | 49.97 | d | |||
1976 | 40.48 | a | 39.35 | l | 41.79 | 47.37 | c | 54.05 | 56.53 | a | ----- | z | ----- | z | 60.60 | a | 51.66 | 46.22 | a | 38.92 | a | 48.63 | c | |||
1977 | 34.92 | a | 43.75 | 42.60 | 51.12 | 51.66 | 60.82 | 62.05 | 68.47 | 58.47 | a | 52.02 | 43.50 | 42.44 | 50.98 | |||||||||||
1978 | 40.81 | 45.31 | a | 48.68 | a | 50.15 | 53.37 | 63.15 | 65.13 | 62.85 | k | 58.90 | 53.35 | 39.27 | 37.07 | c | 50.47 | a | ||||||||
1979 | 31.97 | b | 39.00 | m | 47.80 | a | 49.48 | 55.17 | a | 59.85 | 64.88 | a | 63.29 | 62.10 | 55.16 | 42.75 | 43.76 | 52.38 | a | |||||||
1980 | 33.63 | 41.38 | 44.16 | 51.02 | 53.70 | a | 56.97 | 64.48 | a | 61.61 | 59.38 | 52.40 | 46.38 | 42.82 | 50.66 | |||||||||||
1981 | 42.02 | a | 42.38 | 47.35 | 49.42 | 54.32 | 58.05 | 62.92 | 67.48 | 60.77 | 50.61 | 46.80 | 41.53 | 51.97 | ||||||||||||
1982 | 36.81 | 41.32 | 44.39 | 45.85 | 54.52 | a | 61.97 | a | 62.97 | a | 64.03 | a | 61.03 | m | ----- | z | ----- | z | 35.80 | u | 51.48 | d | ||||
1983 | 43.42 | a | 45.95 | 48.63 | 49.38 | 56.82 | 58.43 | a | 61.82 | 63.92 | a | 56.80 | 50.07 | a | 47.68 | 34.79 | 51.48 | |||||||||
1984 | 40.53 | 43.64 | 48.17 | a | 47.85 | 52.42 | 57.22 | a | 62.75 | a | 64.50 | f | 59.23 | 49.95 | 44.52 | 36.40 | 49.34 | a | ||||||||
1985 | 34.10 | 38.18 | 42.87 | 49.67 | 54.97 | a | 58.87 | 68.23 | 62.97 | 56.25 | 50.08 | 36.62 | a | 33.02 | g | 50.25 | a | |||||||||
1986 | 42.41 | c | 42.76 | a | 49.55 | 48.02 | 53.89 | 62.69 | a | 60.97 | a | 68.13 | 57.88 | 53.58 | 44.91 | a | 37.85 | 51.89 | ||||||||
1987 | 38.08 | 43.69 | a | 47.03 | 51.50 | 57.48 | 60.82 | 62.94 | 65.10 | 61.77 | 54.45 | 46.35 | 36.94 | 52.18 | ||||||||||||
1988 | 37.68 | 41.84 | a | 45.34 | 50.55 | 54.50 | 58.78 | 63.76 | 62.79 | 59.78 | 54.84 | 45.17 | 39.53 | 51.21 | ||||||||||||
1989 | 40.15 | 34.09 | 43.94 | 52.02 | 55.23 | 61.43 | 61.53 | 62.58 | 61.00 | 51.44 | 45.24 | a | 38.47 | b | 50.59 | |||||||||||
1990 | 41.24 | 39.41 | 47.06 | 51.73 | 53.69 | 60.23 | 66.77 | a | 66.60 | 62.95 | 49.26 | 45.23 | 32.52 | 51.39 | ||||||||||||
1991 | 37.48 | 47.07 | a | 43.27 | 48.15 | 51.82 | 56.37 | 64.76 | 65.97 | 62.52 | a | 52.53 | 45.75 | 40.50 | d | 51.35 | ||||||||||
1992 | 43.00 | g | 47.29 | 50.00 | a | 53.07 | a | 58.30 | a | 63.12 | 66.72 | b | 66.15 | a | 58.48 | a | 54.02 | a | 43.36 | a | 37.61 | 54.38 | a | |||
1993 | 34.87 | 38.34 | 46.67 | a | 49.90 | a | 58.65 | 59.12 | 60.24 | 63.93 | a | 60.72 | a | 53.48 | a | 37.78 | 38.47 | 50.18 | ||||||||
1994 | 41.61 | 39.02 | 47.79 | 51.07 | 56.89 | 58.40 | 65.73 | 65.16 | 62.68 | 49.45 | a | 39.58 | 40.39 | 51.48 | ||||||||||||
1995 | 42.47 | 43.61 | 46.32 | 48.62 | a | 57.21 | 60.25 | 65.84 | 62.53 | 62.95 | 51.24 | 49.47 | a | 40.73 | a | 52.60 | ||||||||||
1996 | 39.61 | 40.79 | 45.90 | a | 51.10 | 52.77 | 58.90 | 66.77 | 64.67 | a | 57.41 | a | 50.71 | 43.75 | 40.58 | 51.08 | ||||||||||
1997 | 39.48 | a | 41.20 | a | 45.60 | 49.32 | 58.95 | 59.18 | 64.39 | 67.34 | 62.25 | 51.00 | 47.98 | 38.76 | 52.12 | |||||||||||
1998 | 42.63 | 45.09 | 47.12 | a | 50.22 | a | 54.32 | a | 60.23 | 67.37 | 66.18 | 62.48 | a | 50.97 | 46.95 | 38.30 | a | 52.65 | ||||||||
1999 | 40.76 | 42.75 | 43.89 | 47.90 | 52.15 | 58.79 | a | 63.03 | 65.32 | 60.07 | 51.62 | a | 48.16 | a | 41.58 | 51.33 | ||||||||||
2000 | 38.47 | 42.50 | a | 43.42 | a | 51.63 | 55.31 | 61.65 | 63.73 | 63.37 | 60.23 | 51.44 | 40.36 | a | 39.05 | 50.93 | ||||||||||
2001 | 39.58 | 40.25 | 45.71 | 47.74 | a | 56.50 | 59.05 | 64.08 | 65.77 | a | 61.13 | 50.24 | 46.23 | 38.73 | 51.25 | |||||||||||
2002 | 39.13 | 41.34 | 41.95 | 48.69 | a | 52.68 | a | 60.82 | 65.15 | 63.79 | b | 60.17 | 50.29 | 45.27 | 42.06 | 50.94 | ||||||||||
2003 | 43.73 | 42.46 | 46.75 | a | 49.22 | a | 55.31 | 62.33 | 66.69 | 65.26 | 62.20 | 55.13 | a | 42.21 | a | 41.03 | b | 52.69 | ||||||||
2004 | 36.62 | a | 43.19 | 48.44 | 52.57 | 56.24 | 62.22 | 67.90 | a | 67.97 | 59.38 | 53.55 | 43.45 | 41.32 | 52.74 | |||||||||||
2005 | 40.73 | 41.45 | 48.03 | 50.50 | 57.94 | 58.82 | 66.15 | 66.18 | 57.65 | 54.08 | 42.10 | a | 38.47 | 51.84 | ||||||||||||
2006 | 43.97 | 39.66 | 44.34 | 50.83 | ----- | z | 62.60 | 66.10 | 64.02 | 60.65 | 50.08 | 45.02 | e | 37.26 | h | 52.73 | b | |||||||||
2007 | 33.93 | j | 42.08 | d | 47.16 | i | 48.46 | f | 54.28 | b | 58.90 | a | 66.75 | a | 64.14 | b | 58.29 | d | 49.71 | e | 42.61 | c | 38.23 | g | 54.59 | d |
2008 | 35.44 | f | 42.26 | b | 42.02 | g | 44.94 | c | 56.04 | c | 57.60 | 63.87 | 65.27 | 60.82 | 50.75 | a | 46.65 | 35.74 | 52.39 | b | ||||||
2009 | 37.06 | 39.39 | 42.10 | 48.18 | 56.13 | 61.07 | 69.15 | 65.08 | a | 61.32 | 50.26 | 44.53 | 34.65 | 50.74 | ||||||||||||
2010 | 45.27 | 46.09 | 47.39 | 48.77 | 52.34 | 57.00 | 63.42 | 64.08 | 60.78 | 51.77 | 42.70 | 41.60 | 51.77 | |||||||||||||
2011 | 39.31 | 38.12 | 44.10 | 44.88 | 51.10 | 57.79 | a | 61.61 | 64.71 | 63.00 | 51.97 | 41.95 | 36.48 | 49.59 | ||||||||||||
2012 | 38.68 | 41.16 | 41.92 | 49.45 | 53.29 | 57.52 | 63.56 | 65.74 | 60.17 | 51.89 | 46.08 | 40.15 | 50.80 | |||||||||||||
2013 | 34.74 | 41.21 | 45.65 | 48.80 | 55.77 | 60.87 | 65.37 | 66.35 | 61.78 | 49.55 | 42.78 | 33.47 | 50.53 | |||||||||||||
2014 | 38.69 | 37.61 | 46.16 | 49.34 | a | 57.11 | 59.08 | 66.97 | 68.00 | 62.72 | 56.84 | 44.08 | 42.27 | 52.41 | ||||||||||||
2015 | 40.95 | 46.05 | 48.95 | 48.40 | 56.08 | 64.65 | 68.40 | 67.08 | 58.53 | 55.73 | 42.50 | 40.73 | 53.17 | |||||||||||||
2016 | 40.68 | 45.72 | 46.50 | 53.58 | 57.35 | 60.82 | 63.81 | 65.95 | 58.35 | 53.27 | 50.02 | 35.35 | 52.62 | |||||||||||||
2017 | 32.27 | 40.50 | 44.82 | 47.73 | 56.48 | 61.28 | 65.16 | 68.81 | 62.92 | 50.40 | 45.17 | 36.87 | 51.04 | |||||||||||||
2018 | 43.10 | 39.23 | 42.92 | 49.52 | 58.03 | 59.37 | 67.73 | 66.52 | 58.72 | 52.37 | 44.82 | 40.34 | 51.89 | |||||||||||||
2019 | 40.26 | 35.30 | 42.55 | 49.90 | 56.74 | 59.70 | 64.08 | 66.02 | 60.33 | 47.21 | 43.23 | 39.90 | 50.44 | |||||||||||||
2020 | 42.73 | 40.67 | 42.00 | 49.23 | 55.66 | 59.50 | 63.97 | 65.08 | 62.45 | 52.45 | 42.70 | 40.42 | 51.41 | |||||||||||||
2021 | 42.13 | 38.77 | 42.74 | 49.32 | 54.18 | 65.05 | 66.18 | 66.29 | 59.85 | 50.24 | 45.97 | 38.19 | 51.58 | |||||||||||||
2022 | 39.40 | 39.59 | 45.73 | 44.67 | 51.55 | 59.45 | 67.06 | 68.82 | 63.67 | 56.31 | 39.47 | 37.05 | 51.06 | |||||||||||||
2023 | 40.90 | 37.52 | 40.92 | 46.63 | 58.74 | 59.12 | 66.58 | 68.76 | 60.13 | 53.48 | 43.57 | 42.31 | 51.56 | |||||||||||||
2024 | 37.82 | 43.02 | 45.06 | 49.45 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.84 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.47 | 41.84 | 44.93 | 49.08 | 54.89 | 59.69 | 64.38 | 64.74 | 60.28 | 52.10 | 44.28 | 39.50 | 51.31 | |||||||||||||
S.D. | 4.22 | 2.85 | 2.34 | 2.06 | 2.20 | 2.11 | 2.21 | 2.26 | 2.05 | 2.14 | 2.65 | 2.67 | 0.99 | |||||||||||||
SKEW | -1.30 | -0.13 | 0.30 | -0.42 | 0.27 | 0.41 | 0.02 | -0.05 | 0.06 | 0.15 | -0.44 | -0.20 | 0.30 | |||||||||||||
MAX | 46.44 | 48.94 | 50.22 | 53.58 | 60.94 | 65.05 | 69.15 | 69.18 | 64.52 | 57.10 | 50.02 | 46.69 | 54.72 | |||||||||||||
MIN | 22.35 | 34.09 | 40.68 | 43.21 | 50.88 | 56.22 | 59.20 | 58.58 | 56.25 | 46.12 | 36.62 | 32.52 | 48.40 | |||||||||||||
YRS | 81 | 82 | 81 | 84 | 83 | 82 | 78 | 77 | 81 | 83 | 84 | 79 | 61 |