YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 80.69 | b | 78.89 | 66.45 | 60.84 | 47.95 | 39.18 | 62.33 | f | |||||
1935 | ----- | z | 41.27 | b | 50.32 | c | 54.67 | 58.08 | a | 75.50 | 79.19 | 77.65 | 67.11 | b | 58.28 | b | 43.02 | a | 36.72 | a | 58.35 | a | ||||
1936 | 33.50 | b | 34.43 | a | 48.06 | 55.66 | a | 64.27 | a | 73.52 | 71.62 | g | 78.35 | ----- | z | 52.93 | a | 40.47 | a | 37.34 | 51.85 | b | ||||
1937 | 27.15 | 38.26 | a | 41.60 | 55.07 | 65.18 | a | 72.10 | a | 79.31 | 79.47 | b | ----- | z | 56.78 | f | 44.14 | b | 34.50 | b | 53.68 | b | ||||
1938 | 36.88 | a | 38.25 | b | 49.68 | a | 53.42 | 62.47 | a | 73.37 | 77.00 | 79.35 | 69.22 | 60.45 | b | 41.79 | a | 36.73 | a | 56.55 | ||||||
1939 | 37.88 | a | 30.63 | b | 46.76 | b | 56.83 | 65.50 | 72.83 | 77.23 | a | 75.26 | 71.81 | a | 57.03 | b | 42.97 | 40.03 | a | 56.23 | ||||||
1940 | 27.31 | b | 36.57 | a | 47.73 | 52.87 | d | 65.19 | b | 72.63 | 79.98 | 72.73 | a | 69.89 | b | 59.25 | a | 40.74 | a | 39.52 | b | 55.37 | ||||
1941 | 36.92 | 41.59 | 42.18 | 51.10 | 63.47 | a | 68.42 | 73.10 | 73.73 | 65.72 | 55.27 | a | 46.60 | 37.81 | 54.66 | |||||||||||
1942 | 36.37 | a | 35.11 | 43.45 | i | 55.03 | a | 61.47 | 71.72 | a | 75.29 | 74.27 | 64.67 | 54.92 | 49.07 | 39.29 | 56.11 | a | ||||||||
1943 | 35.85 | 44.23 | 45.06 | 57.20 | 63.57 | a | 74.16 | b | 77.85 | 79.23 | 67.80 | 55.50 | a | 43.84 | a | 30.69 | 56.25 | |||||||||
1944 | 32.11 | 38.71 | 43.27 | 51.32 | 63.22 | a | 72.68 | 74.71 | 74.61 | 67.10 | 57.62 | a | 46.11 | b | 36.00 | c | 54.79 | |||||||||
1945 | 36.52 | b | 41.50 | a | 49.71 | b | 50.93 | c | 63.58 | 70.77 | b | 75.77 | a | 76.84 | b | 70.44 | c | 58.16 | c | 47.80 | 35.50 | 56.46 | ||||
1946 | 35.24 | 40.63 | a | 48.81 | 62.12 | 60.83 | a | 73.72 | 79.27 | 76.50 | a | 70.72 | c | 56.37 | 43.16 | a | 43.66 | 57.59 | ||||||||
1947 | 35.23 | a | 36.28 | c | 42.60 | 53.22 | 63.03 | 71.67 | 78.06 | 76.71 | 72.17 | 62.53 | 40.71 | a | 37.44 | 55.80 | ||||||||||
1948 | 32.65 | a | 35.69 | b | 37.74 | 58.77 | 63.44 | d | 72.73 | 77.03 | 73.34 | 65.07 | ----- | z | 42.03 | a | 38.84 | 54.30 | a | |||||||
1949 | 27.97 | a | 37.96 | 47.58 | 53.47 | a | 63.52 | b | 71.08 | 76.60 | 74.16 | 67.10 | 56.92 | 53.77 | b | 36.76 | 55.57 | |||||||||
1950 | 40.77 | 43.86 | 44.94 | 55.47 | 62.90 | 73.92 | 73.97 | 72.87 | a | 66.00 | 64.02 | a | 46.36 | a | 40.79 | 57.15 | ||||||||||
1951 | 34.87 | 41.69 | a | 44.42 | 53.98 | 65.03 | 70.42 | 78.69 | 76.87 | 68.35 | 57.63 | 42.15 | 36.77 | 55.91 | ||||||||||||
1952 | 39.87 | a | 40.64 | 42.20 | a | 54.28 | 62.78 | b | 78.57 | 77.50 | a | 78.39 | 66.95 | a | 56.60 | 39.42 | 34.89 | 56.01 | ||||||||
1953 | 43.79 | 36.62 | 49.39 | 52.79 | a | 61.19 | 80.93 | 78.76 | 75.15 | 71.53 | 59.58 | a | 48.45 | a | 35.10 | 57.77 | ||||||||||
1954 | 39.24 | 48.52 | b | 44.68 | 61.98 | 61.55 | a | 75.65 | 80.27 | a | 76.61 | 72.09 | a | 59.08 | a | 48.72 | 42.61 | 59.25 | ||||||||
1955 | 35.19 | 35.44 | a | 46.70 | a | 55.41 | a | 63.05 | 70.23 | 77.31 | 76.94 | 70.93 | a | 60.25 | a | 43.87 | 42.55 | a | 56.49 | |||||||
1956 | 39.57 | a | 37.16 | a | 47.74 | 53.64 | a | 68.61 | 76.88 | a | 77.63 | 76.29 | 72.23 | 60.90 | 43.93 | 40.81 | 57.95 | |||||||||
1957 | 36.95 | 46.55 | 46.09 | b | 51.66 | a | 61.39 | 72.15 | 80.61 | 75.84 | 67.40 | a | 56.19 | 40.32 | 43.28 | a | 56.54 | |||||||||
1958 | 36.55 | a | 40.12 | 37.32 | a | 51.62 | a | 67.03 | 75.40 | 75.37 | 77.82 | 69.23 | 57.44 | 47.18 | 38.69 | 56.15 | ||||||||||
1959 | 33.10 | a | 38.61 | 43.66 | b | 53.67 | 64.34 | 74.58 | 75.71 | 76.45 | 69.00 | a | 54.90 | a | 43.82 | 40.29 | 55.68 | |||||||||
1960 | 32.64 | b | 31.88 | a | 45.60 | a | 56.12 | 62.90 | 73.13 | 73.90 | a | 75.82 | 68.65 | 56.33 | a | 46.23 | 34.63 | 54.82 | ||||||||
1961 | 36.23 | 40.09 | 45.42 | 52.83 | 63.24 | 73.98 | a | 75.69 | 74.98 | 65.00 | a | 55.79 | c | 39.52 | a | 35.20 | a | 54.83 | ||||||||
1962 | 32.03 | 43.81 | a | 43.42 | a | 56.93 | a | 66.85 | 69.58 | 76.02 | 76.26 | 68.69 | a | 60.53 | 47.02 | a | 39.31 | 56.70 | ||||||||
1963 | 28.44 | 42.30 | 47.40 | 59.17 | 67.29 | 73.02 | 80.31 | 76.31 | 70.80 | 63.10 | 47.34 | a | 33.23 | 57.39 | ||||||||||||
1964 | 36.77 | 32.03 | 42.82 | 54.77 | 67.06 | 73.63 | 81.03 | a | 76.45 | a | 68.07 | a | 58.92 | 45.34 | a | 35.28 | a | 56.02 | ||||||||
1965 | 40.32 | 37.13 | a | 38.56 | 57.69 | a | 64.18 | a | 69.73 | 77.34 | 74.40 | a | 66.60 | 58.00 | a | 51.42 | 40.71 | 56.34 | ||||||||
1966 | 30.64 | b | 35.52 | 48.30 | a | 55.63 | 66.73 | 73.17 | 80.50 | 72.52 | a | 68.52 | 57.12 | a | 48.77 | 34.29 | 55.97 | |||||||||
1967 | 39.31 | 40.82 | 52.11 | 58.82 | 62.57 | a | 72.22 | a | 75.84 | 72.34 | 66.73 | 59.28 | a | 44.58 | 34.19 | 56.57 | ||||||||||
1968 | 38.06 | 38.12 | 46.18 | 53.21 | b | 63.02 | 74.52 | a | 75.45 | 75.16 | 68.68 | 61.00 | 43.55 | 35.15 | 56.01 | |||||||||||
1969 | 40.90 | 39.25 | 37.23 | 57.08 | 65.27 | 70.75 | 78.79 | 77.31 | 68.57 | 53.29 | 44.68 | 38.61 | 55.98 | |||||||||||||
1970 | 33.34 | 41.98 | 40.66 | 51.53 | 64.75 | a | 70.80 | 76.74 | 75.86 | b | 68.23 | 51.56 | 43.90 | 39.18 | 54.88 | |||||||||||
1971 | 35.42 | 36.71 | 46.17 | a | 52.77 | 61.21 | 73.60 | 75.48 | 71.19 | 65.02 | a | 56.21 | 44.83 | 36.83 | b | 54.62 | ||||||||||
1972 | 37.05 | 41.18 | d | 51.82 | 57.64 | b | 63.08 | 71.80 | 72.94 | 71.42 | 66.35 | 56.18 | a | 35.47 | 35.23 | 55.01 | ||||||||||
1973 | 33.45 | 39.00 | 45.67 | e | 50.38 | f | 60.97 | 71.25 | 75.44 | 76.08 | 66.57 | 59.69 | 48.17 | 37.08 | 55.76 | a | ||||||||||
1974 | 34.58 | 41.46 | 51.55 | 56.07 | 69.61 | 74.32 | 78.34 | 71.10 | 62.27 | 57.74 | 42.97 | 32.98 | 56.08 | |||||||||||||
1975 | 33.60 | 35.68 | 45.03 | 51.87 | 61.31 | 70.95 | 73.63 | 76.19 | 65.53 | a | 58.21 | 43.60 | 39.44 | 54.59 | ||||||||||||
1976 | 35.16 | 44.78 | 45.21 | 56.40 | 61.25 | c | 72.02 | 75.29 | 73.94 | 67.12 | 52.13 | 40.83 | 36.73 | 55.07 | ||||||||||||
1977 | 30.55 | 41.73 | 44.66 | 55.50 | 65.69 | 76.26 | a | 78.82 | 76.48 | 69.53 | a | 59.40 | 46.33 | 40.58 | 57.13 | |||||||||||
1978 | 28.35 | 30.93 | 46.70 | a | 57.05 | 60.79 | 73.08 | 78.87 | 72.63 | 66.48 | 56.95 | b | 43.75 | 31.19 | 53.90 | |||||||||||
1979 | 25.40 | b | 38.07 | 45.85 | 53.28 | 59.85 | 69.00 | 75.63 | 72.31 | 67.85 | 58.29 | 39.20 | 38.47 | 53.60 | ||||||||||||
1980 | 34.65 | 38.60 | 43.21 | 50.27 | 59.39 | 74.80 | 81.65 | 75.61 | 68.08 | 54.60 | 43.57 | 43.69 | 55.68 | |||||||||||||
1981 | 38.50 | 40.20 | 45.55 | 59.91 | a | 61.97 | 75.50 | 78.00 | a | 72.05 | 66.22 | a | 55.44 | 48.40 | 37.73 | 56.62 | ||||||||||
1982 | 37.65 | a | 35.34 | c | 44.83 | a | 53.21 | b | 62.08 | a | 68.62 | 74.94 | 74.16 | 67.86 | a | 54.29 | b | 43.62 | d | 34.29 | c | 54.24 | ||||
1983 | 35.42 | a | 36.86 | 45.09 | c | 48.32 | b | 57.50 | a | 68.08 | 77.08 | 77.79 | 70.78 | a | 57.36 | c | 46.26 | a | 26.39 | c | 53.91 | |||||
1984 | 32.98 | b | 39.63 | f | 42.61 | d | 49.76 | a | 63.76 | b | 71.97 | 76.02 | 73.79 | 67.14 | b | 52.04 | d | 44.70 | b | 38.44 | e | 55.75 | a | |||
1985 | 31.67 | d | 36.92 | d | 46.46 | e | 55.25 | 63.55 | b | 70.34 | a | 75.89 | 74.97 | 65.43 | a | 54.79 | 43.37 | 33.63 | a | 54.36 | ||||||
1986 | 41.94 | 38.75 | 50.11 | 56.31 | a | 62.62 | c | 70.62 | 77.81 | 74.39 | 67.38 | a | 54.43 | b | 41.91 | a | 35.15 | a | 55.95 | |||||||
1987 | 32.39 | 40.04 | a | 42.73 | 52.65 | 62.00 | 70.90 | 77.71 | q | 74.25 | a | 66.69 | c | 58.10 | a | 43.83 | 33.00 | 52.42 | a | |||||||
1988 | 30.03 | 37.59 | b | 44.02 | a | 53.73 | 61.50 | b | 71.84 | a | 74.26 | 75.30 | f | 65.90 | 57.79 | b | 45.72 | a | 34.89 | c | 52.48 | a | ||||
1989 | 37.82 | 32.88 | d | 50.74 | 58.00 | 66.24 | d | 68.08 | 74.61 | c | 73.21 | e | 64.73 | b | 57.67 | a | 45.80 | 30.29 | j | 57.25 | a | |||||
1990 | 33.92 | 37.22 | a | 44.45 | 54.20 | c | 61.72 | a | 77.93 | b | 75.12 | a | 72.64 | f | 68.59 | g | 56.09 | c | 47.24 | a | 30.04 | e | 51.79 | b | ||
1991 | 31.91 | d | 42.61 | 46.47 | b | 54.98 | b | 63.61 | d | 71.38 | b | 73.75 | a | ----- | z | 60.55 | k | 63.24 | l | 38.63 | c | 34.98 | 50.92 | c | ||
1992 | 36.21 | 41.64 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.40 | 37.09 | i | ||
1993 | 31.00 | 34.61 | 45.13 | 52.22 | a | 62.82 | 71.28 | 76.42 | 74.90 | 66.40 | a | 52.71 | 39.30 | ----- | z | 55.16 | a | |||||||||
1994 | 34.26 | 36.20 | 45.07 | b | 52.66 | a | 62.97 | 77.33 | 77.02 | 76.34 | 67.92 | 55.73 | 44.17 | 40.08 | 55.81 | |||||||||||
1995 | 35.65 | 42.98 | 45.52 | 51.08 | 59.45 | b | 69.23 | 74.76 | 77.56 | 67.37 | 55.15 | 46.57 | 36.42 | 55.14 | ||||||||||||
1996 | 34.88 | a | 41.45 | a | 42.02 | a | 53.73 | 68.27 | 72.27 | 73.24 | 71.74 | 62.27 | 52.88 | a | 41.20 | b | 32.40 | 53.86 | ||||||||
1997 | 30.23 | 33.52 | 46.37 | 45.12 | a | 61.05 | 71.10 | 77.60 | 74.33 | b | 69.05 | 55.52 | 40.32 | 32.10 | 53.02 | |||||||||||
1998 | 37.21 | 38.80 | a | 42.16 | 49.86 | b | 65.22 | a | 73.78 | 80.12 | w | ----- | z | 72.67 | 57.29 | 46.53 | 35.56 | 51.91 | b | |||||||
1999 | 37.90 | 43.25 | 44.65 | 51.24 | a | 60.16 | 70.20 | b | 77.63 | 76.15 | 66.05 | a | 55.26 | 49.30 | 36.07 | a | 55.65 | |||||||||
2000 | 38.40 | 44.43 | 47.08 | 55.23 | 67.43 | a | 72.60 | a | 78.15 | 79.05 | 70.92 | 55.92 | 38.14 | a | 32.29 | 56.64 | ||||||||||
2001 | 30.76 | 37.80 | 42.50 | 56.82 | 62.76 | 73.10 | 81.35 | 75.98 | 68.52 | 56.42 | 48.72 | 36.82 | 55.96 | |||||||||||||
2002 | 36.29 | 36.17 | a | 42.00 | a | 57.53 | 64.58 | 78.55 | a | 77.68 | 76.55 | 67.48 | 51.84 | 42.63 | 33.39 | 55.39 | ||||||||||
2003 | 38.42 | 35.73 | 46.82 | 54.93 | 64.95 | 68.28 | 80.64 | b | 77.93 | a | 66.82 | 59.11 | 43.41 | a | 38.27 | 56.28 | ||||||||||
2004 | 36.31 | 35.23 | a | 50.02 | 52.38 | a | 66.72 | f | 72.55 | 73.53 | 70.71 | 66.71 | a | 55.31 | g | 41.07 | 37.37 | a | 53.59 | b | ||||||
2005 | 38.27 | 39.80 | 41.61 | c | 52.40 | 60.87 | a | 70.90 | a | 76.58 | 73.02 | 68.22 | 55.35 | 45.78 | 34.45 | 54.77 | ||||||||||
2006 | 39.55 | 36.77 | 45.22 | m | 57.52 | a | 66.68 | 76.50 | 78.02 | a | 73.48 | a | 61.96 | b | 54.44 | 45.32 | 34.71 | 56.81 | a | |||||||
2007 | 27.35 | 35.63 | a | 49.03 | 49.92 | 61.43 | b | 70.50 | c | 76.13 | 78.70 | a | 69.29 | b | 57.60 | 45.70 | b | 34.00 | 54.61 | |||||||
2008 | 33.57 | b | 37.77 | a | 45.06 | 52.75 | 62.13 | a | 75.36 | b | 75.69 | 73.82 | 65.54 | c | 55.81 | 46.65 | 34.17 | b | 54.86 | |||||||
2009 | 37.23 | 43.07 | f | 46.68 | 51.80 | 62.32 | a | 71.81 | a | 76.35 | a | 74.12 | b | 64.45 | h | 51.22 | m | 46.48 | c | 30.52 | e | 55.26 | c | |||
2010 | 31.71 | b | 25.83 | b | 42.85 | a | 53.11 | g | 60.07 | a | 75.16 | a | 76.20 | a | 74.48 | 71.22 | 56.90 | 42.69 | a | 38.68 | c | 54.16 | a | |||
2011 | 32.40 | b | 35.68 | c | 47.43 | b | 55.32 | 60.97 | a | 76.48 | b | 81.21 | 78.90 | b | 66.32 | 56.20 | a | 44.18 | 28.36 | b | 55.29 | |||||
2012 | 38.23 | a | ----- | z | 51.03 | a | 58.43 | 65.53 | 74.63 | 79.27 | 75.52 | a | 67.28 | a | 53.60 | ----- | z | ----- | z | 62.61 | c | |||||
2013 | 31.81 | 35.45 | ----- | z | 47.97 | 62.82 | 76.57 | 76.00 | 76.47 | 69.75 | 53.55 | 41.58 | 32.98 | 54.99 | a | |||||||||||
2014 | 33.82 | 34.66 | 43.48 | 52.83 | 62.02 | 71.92 | 75.82 | 75.34 | 66.95 | a | 57.31 | 40.40 | 35.23 | 54.15 | ||||||||||||
2015 | 31.37 | 37.41 | 45.16 | 53.20 | 59.03 | a | 72.73 | 76.97 | 74.18 | 72.20 | 57.66 | 43.20 | 34.79 | 54.83 | ||||||||||||
2016 | 34.50 | 40.29 | 46.48 | 51.42 | 58.50 | 73.92 | 78.93 | b | 72.87 | 68.77 | 60.28 | a | 47.53 | 32.26 | 55.48 | |||||||||||
2017 | 34.03 | 43.73 | 49.61 | 51.43 | 59.35 | 73.47 | 77.71 | 70.32 | 66.05 | 54.87 | 49.27 | 35.57 | a | 55.45 | ||||||||||||
2018 | 34.11 | 37.12 | 46.92 | 50.17 | 67.39 | 75.47 | 76.69 | 73.74 | 67.52 | 53.79 | 39.40 | 33.73 | 54.67 | |||||||||||||
2019 | 34.76 | 35.89 | 41.66 | 52.88 | 57.27 | 69.62 | a | 76.77 | a | 75.45 | a | 70.97 | 48.45 | 40.50 | 37.08 | 53.44 | ||||||||||
2020 | 36.16 | 35.21 | 48.53 | 51.87 | 65.63 | a | 71.97 | 75.08 | 74.81 | 60.80 | 50.28 | a | 47.13 | 35.76 | 54.44 | |||||||||||
2021 | 34.26 | 29.12 | 44.24 | 51.00 | 60.26 | 70.28 | 75.34 | 75.87 | 70.70 | 54.05 | 45.77 | 42.69 | 54.47 | |||||||||||||
2022 | 33.15 | 31.55 | 43.26 | 54.18 | 64.85 | 73.77 | 80.19 | 74.68 | 71.42 | 53.52 | a | ----- | z | 33.35 | 55.81 | a | ||||||||||
2023 | 34.69 | 35.57 | 43.79 | 51.87 | 64.66 | 69.58 | 76.21 | e | 77.40 | b | 70.38 | b | 56.92 | a | 45.02 | 39.95 | k | 56.92 | a | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 34.78 | 38.13 | 45.42 | 54.03 | 63.10 | 72.77 | 77.04 | 75.27 | 67.88 | 56.59 | 44.33 | 36.27 | 55.59 | |||||||||||||
S.D. | 3.58 | 3.94 | 3.19 | 3.02 | 2.58 | 2.58 | 2.14 | 2.17 | 2.46 | 2.83 | 3.25 | 3.42 | 1.17 | |||||||||||||
SKEW | -0.24 | -0.17 | -0.20 | 0.16 | 0.14 | 0.52 | 0.25 | -0.11 | -0.24 | -0.02 | 0.00 | -0.01 | 0.36 | |||||||||||||
MAX | 43.79 | 48.52 | 52.11 | 62.12 | 69.61 | 80.93 | 81.65 | 79.47 | 72.67 | 64.02 | 53.77 | 43.69 | 59.25 | |||||||||||||
MIN | 25.40 | 25.83 | 37.23 | 45.12 | 57.27 | 68.08 | 72.94 | 70.32 | 60.80 | 48.45 | 35.47 | 26.39 | 53.02 | |||||||||||||
YRS | 88 | 86 | 85 | 86 | 87 | 88 | 86 | 85 | 84 | 84 | 87 | 86 | 66 |