YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.17 | b | 60.90 | 56.33 | a | 48.98 | a | 38.56 | e | 29.62 | j | 53.39 | g | |
1925 | 36.28 | b | 39.83 | d | 40.19 | d | 43.96 | d | 56.24 | b | 60.57 | a | 66.48 | a | 63.61 | 60.05 | a | 51.90 | 43.93 | 45.73 | 50.73 | |||||
1926 | 38.48 | a | 43.12 | 49.82 | 54.79 | a | 53.74 | 61.67 | 64.40 | a | 62.15 | 56.10 | 51.63 | a | 46.63 | 36.52 | a | 51.59 | ||||||||
1927 | 36.18 | 39.75 | 40.73 | 46.14 | a | 50.31 | 60.02 | 62.66 | 63.39 | 55.66 | a | 48.82 | 41.00 | b | 34.61 | c | 48.27 | |||||||||
1928 | 35.84 | b | 39.10 | 44.53 | 43.00 | t | 56.71 | 57.00 | 62.95 | 61.61 | 55.77 | 48.31 | 42.42 | 35.73 | 49.09 | a | ||||||||||
1929 | 29.97 | 32.24 | a | 41.15 | 43.26 | a | 52.03 | 56.23 | b | 61.19 | 61.81 | 57.58 | 51.90 | a | 41.57 | 39.79 | 47.39 | |||||||||
1930 | 26.39 | 39.50 | 43.19 | 49.98 | 50.73 | 55.95 | 61.74 | 63.40 | 56.78 | 48.17 | a | 42.12 | 37.32 | 47.94 | ||||||||||||
1931 | 40.69 | 40.91 | 42.52 | 49.53 | 56.66 | 57.22 | 63.26 | 62.03 | 56.23 | 48.88 | a | 38.82 | 34.79 | 49.30 | ||||||||||||
1932 | 33.42 | 34.24 | 41.52 | 47.47 | 51.23 | 59.12 | 58.92 | 60.98 | 58.15 | 50.66 | 44.83 | 33.63 | 47.85 | |||||||||||||
1933 | 34.79 | 31.79 | 39.34 | 44.82 | 48.19 | 54.95 | 60.26 | 63.35 | 53.20 | 50.02 | a | 42.98 | 39.68 | 46.95 | ||||||||||||
1934 | 40.79 | 44.84 | 48.27 | 53.58 | 54.81 | 57.90 | 59.76 | 62.39 | 55.18 | 50.66 | 44.95 | 38.47 | a | 50.97 | ||||||||||||
1935 | 35.24 | 41.32 | 38.05 | 45.18 | 52.08 | 57.48 | 60.97 | 60.79 | 59.73 | 47.74 | 38.42 | 40.27 | 48.11 | |||||||||||||
1936 | 37.89 | 27.66 | 38.74 | 48.32 | 54.58 | 58.00 | 60.90 | 62.77 | 55.73 | 51.44 | 43.75 | 37.85 | 48.14 | |||||||||||||
1937 | 25.79 | 34.38 | 43.37 | 43.50 | 51.92 | 58.70 | 61.79 | 59.39 | 57.18 | 53.10 | 42.80 | 37.61 | 47.46 | |||||||||||||
1938 | 37.18 | 38.30 | 39.98 | 48.27 | 53.32 | 60.12 | 65.55 | 61.19 | 61.92 | 52.65 | 41.48 | 40.63 | 50.05 | |||||||||||||
1939 | 39.73 | 35.88 | 42.21 | 50.43 | 54.26 | 55.42 | 63.29 | 64.88 | a | 58.62 | 51.21 | 47.48 | 42.56 | 50.50 | ||||||||||||
1940 | 39.48 | 41.72 | 46.69 | 50.32 | 58.82 | 62.02 | 63.18 | 63.60 | 61.93 | 53.11 | 40.70 | 40.61 | 51.85 | |||||||||||||
1941 | 41.44 | 45.34 | 50.39 | 51.50 | 54.35 | 58.57 | 67.44 | 63.47 | 55.17 | 51.16 | 45.93 | 38.50 | 51.94 | |||||||||||||
1942 | 36.95 | 38.95 | 43.55 | 49.40 | 52.37 | 57.35 | 65.37 | 66.18 | 59.67 | 52.66 | 40.87 | 38.42 | 50.14 | |||||||||||||
1943 | 32.76 | 42.70 | 41.11 | 49.93 | 51.13 | 56.35 | 63.50 | 61.32 | 61.67 | 51.03 | 46.57 | 39.73 | 49.82 | |||||||||||||
1944 | 37.65 | 38.86 | 41.66 | 48.23 | 53.77 | 58.30 | 65.31 | 62.70 | a | 61.33 | 56.50 | 43.38 | 39.60 | 50.61 | ||||||||||||
1945 | 40.37 | 40.05 | 41.13 | 43.93 | 55.31 | 57.87 | 65.66 | 64.65 | 57.52 | 52.47 | 39.67 | 37.37 | 49.67 | |||||||||||||
1946 | 38.23 | 39.36 | 43.05 | 47.85 | 56.83 | a | 56.82 | b | 64.53 | a | 64.92 | 59.02 | b | 47.40 | 40.55 | a | 38.19 | 49.73 | ||||||||
1947 | 35.25 | a | 42.74 | a | 47.94 | 51.34 | a | 58.50 | 58.64 | a | 63.05 | c | 62.34 | 60.41 | a | 50.81 | 43.08 | 39.87 | 51.16 | |||||||
1948 | 37.68 | 37.16 | 41.29 | 44.88 | 52.52 | 61.67 | 62.15 | 60.77 | a | 57.65 | 51.18 | 40.23 | 34.06 | 48.44 | ||||||||||||
1949 | 29.45 | 36.02 | a | 43.76 | 48.87 | 57.18 | 58.55 | 62.13 | 63.11 | 61.08 | 48.47 | 51.87 | 37.56 | 49.84 | ||||||||||||
1950 | 23.92 | 36.38 | 40.45 | a | 45.32 | 51.63 | 59.10 | a | 64.50 | 65.76 | 59.35 | 48.94 | 42.45 | 42.50 | 48.36 | |||||||||||
1951 | 35.55 | 39.04 | 39.16 | 50.83 | 54.68 | 61.62 | 65.08 | 62.24 | 60.93 | 50.29 | 42.05 | a | 34.52 | 49.67 | ||||||||||||
1952 | 32.03 | 37.97 | 40.16 | 48.45 | 53.63 | 54.75 | 63.56 | 62.84 | 60.32 | 56.60 | 41.82 | 37.98 | 49.18 | |||||||||||||
1953 | 42.56 | 40.29 | 41.21 | 46.15 | 52.13 | 54.13 | 62.18 | 63.00 | 60.02 | b | 54.59 | i | 45.17 | 41.45 | 49.84 | a | ||||||||||
1954 | 33.79 | 41.57 | 40.11 | 43.98 | 53.06 | 54.20 | 58.95 | 59.33 | a | 57.48 | 50.20 | a | 48.10 | 38.52 | 48.28 | |||||||||||
1955 | 36.95 | 36.45 | 35.97 | 42.10 | 48.77 | 56.35 | 57.61 | 60.87 | a | 56.16 | a | 50.27 | 35.66 | a | 34.87 | 46.00 | ||||||||||
1956 | 34.97 | 32.95 | 37.95 | a | 48.37 | 56.08 | 55.03 | 64.20 | a | 62.52 | 57.82 | 47.27 | 44.37 | 40.05 | 48.46 | |||||||||||
1957 | 30.68 | 36.89 | 41.77 | a | 48.40 | 56.52 | 58.90 | 60.34 | 60.30 | a | 62.97 | 49.89 | 42.88 | 41.00 | 49.21 | |||||||||||
1958 | 40.87 | 45.57 | 42.66 | 47.78 | 59.80 | a | 62.83 | 69.81 | 66.79 | 59.12 | d | 54.53 | a | 43.39 | g | 42.75 | a | 53.87 | a | |||||||
1959 | 36.40 | 38.07 | 41.82 | 47.47 | 51.53 | 57.82 | 64.85 | 61.05 | 55.10 | 50.89 | 42.60 | a | 38.53 | 48.84 | ||||||||||||
1960 | 34.48 | 39.19 | 41.06 | 47.10 | 50.23 | a | 57.50 | 66.19 | 60.55 | 57.86 | a | 51.80 | a | 42.08 | 39.03 | a | 48.92 | |||||||||
1961 | 42.98 | 41.12 | 42.75 | a | 45.45 | 52.11 | 62.03 | a | 65.18 | 67.31 | 56.07 | a | 48.73 | a | 40.47 | 36.65 | 50.07 | |||||||||
1962 | 36.76 | 40.95 | 39.03 | 48.60 | 48.02 | 56.98 | 61.73 | 61.18 | a | 59.63 | 52.13 | 44.90 | a | 40.60 | 49.21 | |||||||||||
1963 | 32.76 | 45.91 | 42.50 | 45.20 | 53.71 | 55.36 | a | 59.95 | 62.40 | 62.77 | 52.48 | 43.05 | 39.79 | 49.66 | ||||||||||||
1964 | 37.85 | 39.34 | 41.08 | 43.93 | 49.37 | 55.68 | 61.10 | 59.98 | a | 55.77 | 54.29 | 40.03 | 33.61 | 47.67 | ||||||||||||
1965 | 38.21 | 39.36 | 43.94 | 48.08 | 49.95 | 57.68 | 65.16 | 63.76 | 55.95 | 54.85 | 46.95 | 36.82 | 50.06 | |||||||||||||
1966 | 37.16 | 40.05 | 42.68 | 47.98 | 52.68 | a | 56.50 | 60.29 | 62.34 | 60.17 | 50.53 | 44.75 | 41.32 | 49.70 | ||||||||||||
1967 | 40.45 | 41.38 | 39.98 | 43.83 | 52.40 | 61.12 | 63.11 | 67.85 | 62.95 | 52.00 | 45.27 | 37.18 | a | 50.63 | ||||||||||||
1968 | 37.00 | 46.84 | 46.50 | 45.33 | 53.06 | 57.23 | 64.03 | 60.82 | 57.82 | 49.71 | 43.52 | 33.52 | 49.62 | |||||||||||||
1969 | 28.45 | a | 37.73 | 43.94 | 47.10 | 55.47 | 62.33 | 61.18 | 59.50 | 57.85 | 49.19 | 45.93 | 40.21 | 49.07 | ||||||||||||
1970 | 36.15 | 45.09 | 43.02 | 43.05 | 51.56 | 60.85 | 61.98 | 61.31 | 55.13 | 49.50 | 43.45 | 34.29 | 48.78 | |||||||||||||
1971 | 36.40 | 39.77 | 37.35 | 45.40 | 52.32 | 53.43 | 63.21 | 65.76 | 56.38 | 48.16 | 41.65 | 34.94 | 47.90 | |||||||||||||
1972 | 33.47 | 38.95 | 43.48 | 43.27 | 55.02 | 57.35 | 62.98 | 64.00 | 54.33 | 48.79 | 44.12 | 33.35 | 48.26 | |||||||||||||
1973 | 35.52 | 42.43 | 42.48 | 46.87 | 54.37 | 56.83 | 62.26 | 58.79 | 59.05 | 49.74 | 38.30 | 40.95 | 48.97 | |||||||||||||
1974 | 34.18 | 38.88 | 41.40 | 46.18 | 49.10 | 58.08 | 61.06 | 63.47 | 63.05 | 52.39 | 43.37 | 40.08 | 49.27 | |||||||||||||
1975 | 36.00 | 36.71 | 39.84 | 42.18 | 52.05 | 55.50 | 63.35 | 59.27 | 60.25 | 49.19 | 41.02 | 39.48 | 47.90 | |||||||||||||
1976 | 39.42 | 39.02 | 39.18 | 46.82 | 53.15 | 54.40 | 61.06 | 59.58 | 59.57 | 51.11 | ----- | z | 41.34 | 49.51 | a | |||||||||||
1977 | 36.34 | 44.75 | 40.63 | 49.98 | 50.18 | 59.10 | 60.37 | 66.35 | 56.05 | 50.21 | 39.95 | 39.08 | 49.42 | |||||||||||||
1978 | 39.63 | 42.72 | a | 45.58 | 47.23 | 51.48 | 61.48 | 62.98 | 61.95 | 55.83 | 53.55 | 38.65 | 33.37 | 49.54 | ||||||||||||
1979 | 30.52 | 36.80 | 45.97 | 46.93 | 54.39 | 58.78 | 63.58 | 62.76 | 60.95 | 52.82 | 42.13 | 41.35 | 49.75 | |||||||||||||
1980 | 32.42 | 40.43 | 41.94 | 50.43 | 52.34 | 55.50 | 61.98 | 59.82 | 57.92 | 53.00 | 44.45 | 40.94 | 49.26 | |||||||||||||
1981 | 44.94 | 40.96 | a | 46.56 | 47.03 | 51.98 | 55.12 | 60.60 | 66.45 | a | 59.37 | 48.15 | 45.80 | 37.74 | 50.39 | |||||||||||
1982 | 36.88 | b | 37.65 | b | 42.12 | b | 44.64 | a | 51.47 | 61.46 | c | 60.13 | a | 62.55 | a | 58.68 | b | 50.90 | a | 38.97 | 37.90 | 48.61 | ||||
1983 | 41.77 | a | 43.20 | 46.79 | 48.48 | a | 54.66 | c | 56.43 | a | 59.45 | b | 62.45 | a | 55.55 | a | 49.27 | a | 43.68 | 30.34 | 49.34 | |||||
1984 | 40.39 | 41.69 | 45.21 | 45.36 | a | 49.93 | b | 55.00 | 62.27 | 61.98 | 56.80 | 47.53 | a | 41.33 | 33.92 | 48.45 | ||||||||||
1985 | 36.93 | b | 35.45 | 40.47 | 47.07 | a | 52.90 | 57.05 | 66.89 | 61.95 | 55.12 | 48.19 | 32.22 | 36.06 | 47.52 | |||||||||||
1986 | 42.11 | 38.84 | 46.40 | 44.97 | 52.77 | 60.93 | a | 58.58 | 66.05 | 54.85 | 52.94 | 41.90 | 37.92 | 49.86 | ||||||||||||
1987 | 36.91 | b | 43.93 | a | 44.29 | 49.98 | 54.26 | 59.62 | 61.44 | 62.89 | 60.30 | 54.03 | 45.58 | 35.26 | 50.71 | |||||||||||
1988 | 36.57 | a | 41.31 | 42.26 | 47.80 | 52.10 | 56.23 | 61.63 | 61.52 | 57.27 | 53.50 | 41.58 | 39.87 | 49.30 | ||||||||||||
1989 | 37.06 | 31.29 | 39.98 | 49.43 | 52.45 | 60.02 | 60.23 | 60.79 | 60.15 | 49.67 | a | 44.10 | 39.89 | 48.75 | ||||||||||||
1990 | 39.85 | 36.04 | 44.60 | a | 49.48 | 51.44 | 56.29 | a | 65.97 | b | 63.92 | a | 59.68 | 47.29 | 43.23 | 31.15 | 49.08 | |||||||||
1991 | 35.39 | 45.23 | b | 40.31 | 45.85 | 50.19 | 53.98 | a | 63.31 | 64.34 | 59.71 | a | 50.40 | a | 42.98 | 41.42 | 49.43 | |||||||||
1992 | 40.50 | a | 45.91 | a | 48.42 | 50.62 | 56.94 | 61.55 | 63.00 | 63.68 | 56.33 | a | 50.53 | 41.62 | 34.95 | 51.17 | ||||||||||
1993 | 33.47 | 38.43 | 44.34 | b | 46.85 | 57.29 | 57.26 | a | 57.90 | a | 62.10 | 58.43 | 53.33 | a | 37.29 | b | 38.26 | 48.75 | ||||||||
1994 | 42.08 | 36.28 | a | 45.23 | 48.57 | 53.92 | a | 56.03 | a | 64.02 | 62.82 | a | 60.90 | 49.76 | 37.60 | a | 37.08 | 49.52 | ||||||||
1995 | 40.69 | 42.43 | a | 44.14 | b | 47.93 | 55.73 | 58.75 | 64.28 | a | 60.36 | b | 62.05 | 49.98 | a | 47.35 | 37.27 | 50.91 | ||||||||
1996 | 36.26 | 39.31 | ----- | z | 47.97 | a | 49.15 | a | 56.70 | 65.06 | 63.82 | 55.47 | 49.58 | a | 41.08 | 36.47 | a | 49.17 | a | |||||||
1997 | 38.92 | a | 42.21 | 44.26 | 47.14 | a | 56.00 | a | 57.05 | 61.57 | a | 65.63 | a | 60.77 | 49.89 | 47.17 | a | 40.60 | 50.93 | |||||||
1998 | 39.68 | c | 43.54 | a | 44.15 | 47.91 | b | 52.13 | 57.60 | 65.34 | 63.98 | 61.88 | 51.37 | a | 44.60 | 36.29 | 50.71 | |||||||||
1999 | 40.39 | 39.61 | a | 42.09 | b | 43.94 | l | 49.23 | a | 54.75 | 60.39 | 63.00 | 58.76 | a | 50.68 | 45.34 | b | 41.85 | a | 49.64 | a | |||||
2000 | 37.10 | b | 40.88 | a | 41.64 | b | 49.33 | a | 52.26 | 58.12 | b | 61.11 | 61.27 | a | 58.28 | a | 50.74 | 40.29 | a | 38.50 | 49.13 | |||||
2001 | 39.44 | 39.32 | 43.64 | b | 45.33 | a | 52.53 | b | 54.80 | 60.73 | a | 62.85 | a | 58.61 | c | 49.10 | a | 45.16 | b | 38.56 | 49.17 | |||||
2002 | 38.53 | 40.41 | 40.14 | b | 45.93 | b | 51.65 | a | 58.87 | 62.57 | b | 62.70 | a | 58.80 | 49.07 | c | 48.08 | 41.02 | 49.81 | |||||||
2003 | 44.84 | c | 40.82 | 44.00 | b | 46.23 | b | 52.02 | b | 59.91 | b | 65.07 | b | 64.53 | b | 61.17 | c | 52.55 | a | 41.07 | b | 39.22 | b | 50.95 | ||
2004 | 37.43 | a | 41.43 | 45.85 | a | 50.93 | b | 53.50 | b | 59.35 | f | 64.98 | g | 66.13 | 57.04 | b | 51.86 | c | 43.50 | d | 40.50 | g | 49.74 | c | ||
2005 | 40.50 | c | 42.77 | d | 46.93 | b | 47.79 | a | 55.14 | b | 56.40 | a | 63.42 | f | 64.86 | c | 57.11 | c | 52.60 | f | 42.65 | f | 39.05 | c | 50.06 | c |
2006 | 40.80 | c | 39.15 | b | 42.38 | a | 48.33 | d | 53.78 | b | 59.67 | a | 64.23 | a | 63.45 | a | 60.74 | a | 50.50 | c | 41.46 | b | 38.70 | c | 50.27 | |
2007 | 37.15 | a | 41.69 | b | 44.47 | a | 46.67 | a | 54.36 | c | 56.90 | d | 64.16 | b | 62.56 | e | 57.24 | a | 49.27 | e | 42.95 | b | ----- | z | 50.67 | a |
2008 | 35.56 | d | 40.91 | a | 40.97 | 42.37 | 52.47 | a | 53.36 | a | 61.55 | 62.94 | 57.91 | a | 50.17 | e | ----- | z | 33.65 | a | 48.35 | a | ||||
2009 | 37.52 | 39.28 | a | 37.87 | a | 44.47 | ----- | z | ----- | z | ----- | z | 63.31 | 62.28 | 49.42 | 43.33 | a | 34.83 | b | 45.81 | c | |||||
2010 | 43.66 | 44.55 | 44.67 | a | 46.57 | 49.94 | 54.97 | a | 62.74 | b | 62.69 | 59.12 | 51.05 | a | 40.90 | a | 39.18 | a | 50.00 | |||||||
2011 | 39.27 | 37.83 | d | 42.07 | a | 42.19 | a | 49.41 | c | 56.28 | 61.32 | a | 63.79 | 61.92 | 49.92 | 39.68 | 37.66 | 48.45 | ||||||||
2012 | 36.97 | 41.47 | 39.76 | b | 48.50 | 53.32 | 54.55 | 62.60 | e | 65.92 | 61.48 | 51.48 | 44.07 | 37.45 | 49.80 | |||||||||||
2013 | 35.70 | d | 40.21 | 44.42 | a | 46.43 | a | 55.17 | b | 60.85 | d | 64.82 | a | 66.54 | c | 60.40 | a | 48.76 | 44.60 | 35.92 | 50.32 | |||||
2014 | 41.78 | a | 36.16 | 44.52 | c | 49.60 | 56.87 | a | 58.57 | 67.27 | c | 67.50 | a | 62.67 | 58.38 | n | ----- | z | ----- | z | 53.88 | c | ||||
2015 | 45.05 | c | 47.69 | b | 48.48 | 48.68 | 55.95 | 65.12 | 68.58 | 66.48 | 58.00 | 56.16 | 42.28 | 38.35 | 53.40 | |||||||||||
2016 | 40.11 | 46.16 | 46.24 | 54.48 | 56.98 | 60.10 | 63.24 | 66.00 | 58.53 | 52.21 | 48.57 | a | 34.02 | 52.22 | ||||||||||||
2017 | 34.63 | a | 38.23 | 42.52 | 47.27 | 55.53 | 59.63 | 64.81 | 69.53 | 62.32 | 50.60 | 42.60 | 38.18 | 50.49 | ||||||||||||
2018 | 41.68 | 37.34 | 43.77 | 49.55 | 57.48 | 58.80 | 68.13 | 67.39 | 58.95 | 51.98 | 46.05 | 39.32 | 51.70 | |||||||||||||
2019 | 42.88 | a | 32.71 | 44.26 | 48.77 | 57.40 | 59.25 | 63.89 | 66.06 | 59.37 | 48.19 | 44.28 | 40.24 | 50.61 | ||||||||||||
2020 | 39.90 | 40.47 | 41.26 | 48.82 | 56.05 | 58.25 | 63.89 | 64.39 | 64.02 | 51.82 | 43.43 | 41.74 | 51.17 | |||||||||||||
2021 | 40.26 | 35.71 | 42.74 | 49.97 | 53.77 | 64.33 | 67.11 | 66.42 | a | 59.77 | 49.88 | a | 45.55 | 36.48 | f | 52.32 | a | |||||||||
2022 | 39.08 | 40.68 | 44.40 | b | 43.25 | p | 50.23 | r | 59.34 | k | 67.62 | r | 69.45 | c | 65.30 | 57.68 | a | 41.37 | 37.35 | a | 49.41 | d | ||||
2023 | 41.08 | 38.17 | a | 42.40 | a | 45.90 | 59.77 | 59.38 | a | 66.82 | 68.34 | 60.03 | 51.66 | 42.33 | 41.35 | a | 51.44 | |||||||||
2024 | 35.74 | 41.98 | a | 40.42 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.38 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.29 | 39.78 | 42.74 | 47.36 | 53.38 | 57.97 | 63.01 | 63.27 | 58.77 | 50.88 | 42.83 | 38.08 | 49.56 | |||||||||||||
S.D. | 3.99 | 3.59 | 2.79 | 2.60 | 2.63 | 2.49 | 2.42 | 2.37 | 2.47 | 2.13 | 2.96 | 2.81 | 1.30 | |||||||||||||
SKEW | -0.78 | -0.43 | 0.35 | 0.20 | 0.23 | 0.42 | 0.26 | 0.47 | 0.14 | 0.77 | -0.25 | -0.32 | 0.12 | |||||||||||||
MAX | 45.05 | 47.69 | 50.39 | 54.79 | 59.80 | 65.12 | 69.81 | 69.53 | 65.30 | 57.68 | 51.87 | 45.73 | 53.40 | |||||||||||||
MIN | 23.92 | 27.66 | 35.97 | 42.10 | 48.02 | 53.36 | 57.61 | 58.79 | 53.20 | 47.27 | 32.22 | 30.34 | 46.00 | |||||||||||||
YRS | 100 | 100 | 99 | 96 | 97 | 96 | 96 | 100 | 100 | 97 | 95 | 95 | 85 |