YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1932 | 36.44 | d | 39.55 | 53.83 | a | 56.80 | 65.68 | 78.07 | 81.03 | 81.10 | 82.07 | 66.84 | 54.83 | 36.03 | 61.02 | |||||||||||
1933 | 36.32 | 36.39 | 49.55 | 60.67 | 58.87 | 75.10 | 86.45 | 84.55 | 73.57 | 73.29 | 57.97 | 46.13 | 61.57 | |||||||||||||
1934 | 46.84 | 52.82 | 64.74 | 69.57 | 71.45 | 73.50 | 83.42 | 85.74 | 77.17 | 66.55 | b | 52.43 | 44.84 | 65.76 | ||||||||||||
1935 | 39.32 | 47.29 | 49.45 | 57.57 | 69.03 | 78.03 | 82.83 | a | 84.94 | 82.60 | 63.76 | b | 49.07 | 44.29 | 62.35 | |||||||||||
1936 | 41.55 | 46.00 | 55.74 | 64.00 | 70.29 | 75.67 | 85.39 | 85.55 | 78.27 | 72.81 | 60.90 | 44.29 | 65.04 | |||||||||||||
1937 | 27.45 | 39.57 | 50.68 | 56.57 | 72.77 | 74.27 | 86.00 | 82.74 | 78.93 | 67.77 | 51.67 | 46.45 | 61.24 | |||||||||||||
1938 | 46.00 | 39.61 | 45.84 | 60.00 | 68.84 | 80.10 | 86.84 | 84.00 | 80.47 | 63.48 | 49.93 | 45.23 | 62.53 | |||||||||||||
1939 | 42.16 | 41.11 | 56.94 | 68.70 | 71.03 | 75.87 | 86.13 | 87.45 | 76.46 | d | 67.03 | 60.83 | 48.33 | a | 65.17 | |||||||||||
1940 | 46.77 | 46.31 | 55.81 | 62.50 | 72.87 | 83.20 | 82.87 | 86.97 | 71.03 | 63.65 | 47.43 | 44.16 | 63.63 | |||||||||||||
1941 | 44.42 | 48.29 | 57.16 | 59.03 | 66.67 | a | 70.80 | 84.90 | 78.42 | 69.80 | 61.94 | 54.50 | 40.61 | 61.38 | ||||||||||||
1942 | 36.42 | 42.61 | 52.35 | 59.03 | 62.16 | 72.93 | 85.32 | 84.45 | 77.90 | 68.42 | 50.20 | 43.68 | 61.29 | |||||||||||||
1943 | 40.32 | 44.68 | 55.19 | 62.00 | 65.32 | 63.40 | 82.58 | 81.55 | 83.07 | 61.45 | 51.00 | 41.87 | 61.04 | |||||||||||||
1944 | 39.56 | f | 42.00 | 50.74 | 54.50 | 67.52 | 68.70 | 81.94 | 81.71 | 77.77 | 68.45 | 42.63 | 40.65 | 61.51 | a | |||||||||||
1945 | 40.65 | 44.36 | 46.77 | 57.13 | 63.94 | 72.77 | 86.68 | 83.00 | 75.40 | 66.29 | 45.40 | 38.84 | 60.10 | |||||||||||||
1946 | 38.32 | 40.89 | 50.00 | 61.77 | 68.97 | 71.90 | 82.94 | 85.77 | 74.13 | 57.03 | 46.62 | a | 42.32 | 60.06 | ||||||||||||
1947 | 38.03 | 50.96 | 55.00 | 61.57 | 73.03 | 68.30 | 78.65 | 79.94 | 77.23 | 61.55 | 45.83 | 42.19 | 61.02 | |||||||||||||
1948 | 45.48 | 43.10 | 44.77 | 48.93 | 60.55 | 73.07 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.65 | f | ||||||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | 49.09 | f | 50.26 | 59.90 | 69.84 | 74.20 | 86.50 | a | 85.90 | 74.11 | b | 62.86 | b | 53.93 | c | 46.62 | g | 68.61 | c | |||||
1951 | 40.71 | 43.89 | 50.68 | 66.60 | 68.10 | 79.87 | 85.94 | 82.97 | 81.17 | 61.00 | a | 49.87 | 34.32 | 62.09 | ||||||||||||
1952 | 34.13 | 42.48 | 44.97 | 64.73 | 71.17 | a | 71.87 | 86.00 | e | 83.27 | a | 80.17 | 72.77 | 50.20 | 37.96 | f | 63.80 | a | ||||||||
1953 | 44.81 | 49.46 | 51.32 | 57.97 | a | 58.55 | 67.73 | 85.32 | 78.87 | 81.40 | 65.00 | 51.03 | 43.67 | a | 61.26 | |||||||||||
1954 | 39.10 | 51.32 | 48.77 | a | 62.40 | 73.74 | 71.50 | 85.39 | 77.71 | 74.57 | 64.35 | 54.50 | 40.90 | a | 62.02 | |||||||||||
1955 | 34.16 | 41.62 | b | 49.74 | 50.93 | a | 67.48 | 77.77 | 80.19 | 86.23 | 75.79 | a | 65.90 | 46.33 | 41.24 | f | 61.47 | a | ||||||||
1956 | 40.39 | 36.00 | 49.87 | 62.17 | 68.03 | 74.50 | 84.06 | 81.00 | 77.93 | 59.39 | 53.80 | 43.48 | 60.89 | |||||||||||||
1957 | 36.52 | 47.64 | 50.50 | a | 59.57 | 67.13 | 81.03 | 84.50 | a | 82.42 | 80.77 | 57.81 | 48.13 | 44.30 | a | 61.69 | ||||||||||
1958 | 40.84 | 48.63 | a | 46.81 | 57.67 | 75.65 | 75.80 | 86.16 | 88.23 | 77.00 | 72.03 | 52.40 | 50.97 | 64.35 | ||||||||||||
1959 | 44.77 | 44.54 | 56.42 | 65.90 | 64.55 | 80.38 | a | 90.06 | 84.70 | a | 72.07 | 69.53 | a | 59.50 | 43.48 | 64.66 | ||||||||||
1960 | 37.90 | 44.90 | 56.29 | 58.63 | 64.61 | 83.07 | 90.48 | 84.52 | 82.03 | 66.52 | 46.97 | a | 42.90 | 63.24 | ||||||||||||
1961 | 49.42 | 47.27 | b | 49.81 | 61.43 | 65.03 | 83.23 | 87.34 | b | 86.83 | a | 73.72 | a | 64.90 | 49.59 | a | 39.00 | 63.13 | ||||||||
1962 | 34.58 | 39.19 | a | 48.37 | a | 65.20 | 63.19 | 77.43 | 83.94 | 82.03 | 81.41 | a | 65.10 | b | 56.44 | l | 45.14 | i | 64.04 | b | ||||||
1963 | 46.26 | 54.46 | 50.54 | c | 50.00 | 68.81 | 73.13 | 79.35 | 81.00 | 79.87 | 65.84 | 50.13 | 46.39 | 62.15 | ||||||||||||
1964 | 38.61 | 39.86 | 47.61 | 59.07 | 66.32 | 71.10 | 84.42 | 83.39 | 77.47 | 72.19 | 48.31 | a | 41.73 | a | 60.84 | |||||||||||
1965 | 37.52 | 50.42 | b | 56.58 | 58.20 | 67.52 | 74.93 | 85.03 | 79.84 | 75.00 | 73.70 | a | 49.77 | 39.97 | 62.37 | |||||||||||
1966 | 40.29 | 43.93 | 54.58 | 66.20 | 75.17 | a | 74.23 | 82.58 | 85.81 | 79.80 | 69.42 | 48.14 | b | 43.03 | 63.60 | |||||||||||
1967 | 42.94 | 52.07 | a | 48.13 | 47.20 | 70.13 | 77.37 | 88.32 | 91.38 | b | 83.70 | 67.58 | 55.27 | 35.63 | a | 63.31 | ||||||||||
1968 | 42.13 | 53.83 | 56.83 | a | 61.47 | 68.43 | a | 79.30 | 89.29 | 78.35 | 78.83 | 66.48 | 48.52 | a | 38.42 | 63.49 | ||||||||||
1969 | 36.87 | 40.96 | 52.00 | 60.13 | 74.74 | 75.14 | a | 85.87 | 85.97 | 79.73 | 60.03 | 56.31 | a | 43.97 | 62.64 | |||||||||||
1970 | 42.06 | 52.86 | 52.20 | a | 54.33 | 71.97 | 79.73 | 88.90 | a | 88.29 | 76.97 | 65.60 | a | 50.33 | 37.06 | 63.36 | ||||||||||
1971 | 43.03 | 47.57 | 47.30 | d | 57.63 | 65.97 | 73.93 | a | 86.00 | 88.94 | 74.55 | a | 60.75 | c | 50.53 | 33.83 | a | 60.84 | ||||||||
1972 | 36.68 | c | 46.97 | 58.63 | a | 58.62 | a | 72.55 | 80.53 | 88.07 | a | 86.42 | 73.53 | 64.83 | b | 45.43 | 35.72 | b | 62.33 | |||||||
1973 | 39.00 | 48.32 | ----- | z | 62.59 | a | 75.19 | 79.03 | 87.23 | 84.45 | 77.43 | ----- | z | 44.63 | ----- | z | 66.43 | c | ||||||||
1974 | 39.58 | 47.19 | b | 51.80 | a | 58.03 | a | 68.97 | 82.38 | a | 82.90 | a | 85.61 | 85.23 | 69.77 | 52.83 | 41.46 | c | 63.81 | |||||||
1975 | 36.79 | g | 43.38 | d | 47.58 | 51.73 | 70.10 | 75.50 | b | 84.26 | 80.32 | 83.07 | 60.45 | 47.97 | 42.67 | d | 62.46 | a | ||||||||
1976 | 46.04 | e | 48.88 | e | 49.79 | c | 57.73 | 73.37 | a | 72.97 | 84.61 | 76.48 | 78.90 | 70.43 | a | 58.76 | a | 48.72 | f | 65.27 | a | |||||
1977 | 27.55 | i | 46.55 | f | 46.11 | c | 64.93 | 59.19 | 81.63 | 84.29 | 85.03 | a | 73.37 | 67.52 | 50.79 | b | 44.11 | d | 65.70 | b | ||||||
1978 | 46.07 | b | 48.81 | a | 60.38 | b | 55.86 | b | 68.07 | b | 77.52 | a | 84.61 | 81.71 | 73.86 | a | 73.87 | 48.23 | 37.74 | 63.06 | ||||||
1979 | 39.47 | a | 43.89 | 57.16 | 58.83 | 71.97 | a | 78.67 | 85.23 | a | 81.68 | 81.73 | 66.39 | 47.73 | 44.48 | 63.10 | ||||||||||
1980 | 44.55 | 49.83 | 50.84 | 62.63 | 65.87 | a | 70.50 | 85.03 | a | 83.40 | a | 78.57 | 69.71 | 52.50 | 43.68 | 63.09 | ||||||||||
1981 | 45.84 | 48.75 | 53.45 | 62.80 | 67.06 | 76.87 | 85.16 | 89.16 | 78.27 | 61.23 | 51.20 | 43.55 | 63.61 | |||||||||||||
1982 | 38.24 | b | 45.93 | a | 47.93 | d | 53.76 | e | 69.58 | e | 75.88 | e | 82.22 | d | 84.46 | g | 73.90 | j | 61.76 | f | 45.69 | d | 38.38 | e | 55.29 | c |
1983 | 41.37 | a | 46.08 | d | 47.79 | b | 52.04 | d | 70.81 | e | 71.83 | f | 79.18 | i | 83.23 | i | 76.09 | h | 67.24 | f | 43.38 | d | 37.86 | c | 48.48 | e |
1984 | 40.62 | b | 44.88 | c | 54.31 | e | 53.71 | i | 69.00 | c | 74.11 | c | 87.48 | f | 84.96 | g | 75.90 | i | 55.21 | g | 43.71 | b | 33.93 | b | 51.51 | e |
1985 | 36.50 | c | 44.20 | h | 50.12 | f | 65.33 | f | 68.11 | l | 80.13 | g | 86.89 | d | 81.74 | h | 68.00 | h | ----- | z | 38.74 | c | 39.70 | d | 50.46 | h |
1986 | 48.66 | b | 48.96 | c | ----- | z | ----- | z | 70.33 | g | ----- | z | 81.04 | f | 87.88 | e | 66.30 | j | 65.79 | g | 50.00 | e | 39.92 | e | 55.08 | g |
1987 | 37.79 | b | 47.13 | e | 51.48 | h | 68.20 | e | 70.59 | i | 80.04 | g | 76.93 | c | 84.42 | e | 81.41 | h | 73.69 | b | 50.90 | a | 36.70 | a | 59.47 | d |
1988 | 35.15 | d | 48.92 | c | 56.08 | f | 60.30 | g | 64.86 | b | 74.52 | g | 86.67 | j | 85.30 | h | 78.22 | l | 74.88 | f | 45.74 | c | 40.93 | c | 47.12 | g |
1989 | 31.07 | b | 34.71 | d | 49.70 | d | 64.10 | j | 66.55 | b | 76.91 | g | ----- | z | 78.75 | g | 76.65 | j | 61.61 | c | 51.24 | e | 42.82 | c | 48.24 | e |
1990 | 38.25 | g | 41.24 | c | ----- | z | ----- | z | 60.77 | i | 71.57 | g | 81.76 | f | 80.26 | h | 76.27 | h | ----- | z | 49.41 | c | 34.11 | d | 41.59 | i |
1991 | 44.04 | d | 55.35 | h | 46.88 | f | 55.68 | h | ----- | z | ----- | z | 85.87 | h | 83.04 | f | 81.50 | j | 64.23 | i | 47.80 | e | 38.00 | g | 45.92 | j |
1992 | 40.71 | c | 48.70 | f | 55.79 | g | ----- | z | 78.96 | g | 78.56 | l | 84.16 | f | ----- | z | 77.61 | g | 66.46 | g | 47.19 | c | 32.12 | e | 40.00 | i |
1993 | 29.76 | f | 34.80 | c | 52.36 | f | ----- | z | 69.25 | g | 71.00 | j | 76.50 | i | 81.10 | j | 77.92 | e | 63.09 | i | 45.58 | d | 36.74 | d | 48.76 | h |
1994 | 43.48 | d | 42.43 | e | 58.52 | j | 59.74 | g | 70.23 | i | 77.27 | h | ----- | z | 85.48 | f | 79.16 | e | 63.43 | j | 37.52 | g | 37.44 | f | 55.03 | i |
1995 | 42.63 | d | 57.00 | h | 48.27 | e | 56.25 | j | 67.16 | f | 71.68 | h | 81.33 | g | 82.17 | h | 78.00 | k | 64.29 | g | 55.97 | a | 43.16 | 47.51 | h | |
1996 | 39.79 | b | 47.00 | 55.06 | 60.21 | a | 64.60 | a | 76.55 | a | 86.13 | h | 85.87 | a | 73.67 | 59.53 | n | 50.07 | 40.89 | c | 59.37 | b | ||||
1997 | 40.53 | a | 44.93 | a | 54.77 | i | 57.52 | i | 72.83 | h | 71.76 | i | 81.19 | e | 81.64 | i | 75.09 | g | 59.42 | l | 48.25 | f | 38.11 | d | 51.19 | h |
1998 | 42.08 | f | 41.57 | e | 50.00 | h | 54.62 | d | 56.85 | k | 72.71 | f | 86.09 | i | 86.59 | i | 77.00 | h | 59.45 | i | 41.81 | d | 35.13 | h | 46.00 | i |
1999 | 40.64 | f | 38.83 | e | 46.96 | h | 55.76 | i | 64.76 | j | 74.35 | j | 82.79 | l | 79.58 | g | 78.60 | j | 67.79 | l | 52.52 | c | 41.25 | g | 45.67 | j |
2000 | 39.42 | e | 45.96 | e | 52.09 | h | 63.67 | l | 66.95 | l | 80.60 | j | 81.50 | g | 85.24 | f | 74.81 | i | 63.25 | g | 42.08 | f | 45.37 | d | 43.58 | i |
2001 | 44.08 | f | 43.90 | h | 55.88 | g | 54.00 | h | ----- | z | 76.90 | i | 84.00 | e | 87.83 | g | 79.68 | h | 68.24 | n | 50.30 | j | 38.44 | d | 61.22 | j |
2002 | 39.00 | f | 50.55 | h | 52.62 | g | 61.85 | j | 67.78 | h | 79.05 | i | 89.04 | h | 82.70 | h | 79.45 | j | 69.40 | f | 53.80 | e | 42.79 | b | 48.30 | j |
2003 | 49.15 | e | 47.45 | f | 53.00 | e | 50.05 | h | 66.96 | g | 80.22 | g | 90.67 | g | 83.67 | g | 83.04 | g | 71.96 | f | 46.00 | f | 42.07 | c | 48.08 | i |
2004 | 40.67 | d | 45.00 | d | 61.17 | g | 63.71 | f | 67.09 | i | 78.45 | j | 86.00 | d | 85.04 | g | 77.21 | k | 62.38 | e | 48.92 | e | 44.24 | b | 54.54 | f |
2005 | 40.86 | c | 49.61 | e | 55.79 | g | 57.23 | h | 65.78 | h | ----- | z | 87.38 | g | 86.43 | j | 74.10 | i | 64.75 | g | 47.19 | d | 40.93 | a | 44.65 | h |
2006 | 41.37 | d | 46.80 | h | 42.17 | g | 57.00 | f | ----- | z | 79.42 | f | ----- | z | 83.52 | f | 80.32 | h | 64.50 | m | 48.57 | g | 41.90 | a | 41.64 | j |
2007 | 40.92 | g | 46.44 | j | 58.48 | j | 62.14 | i | 71.41 | i | 76.95 | j | 87.92 | f | 85.80 | k | 74.67 | i | 60.38 | g | 50.62 | f | 36.38 | j | ----- | z |
2008 | 33.48 | j | 41.20 | i | 49.10 | j | 55.10 | j | 65.71 | j | 76.52 | g | 86.25 | k | 86.57 | c | 80.69 | a | 67.13 | 53.43 | 40.71 | 65.71 | g | |||
2009 | 44.90 | 47.68 | 51.03 | a | 60.00 | 72.16 | 74.70 | 87.03 | 83.81 | 83.10 | a | 61.29 | 50.07 | 38.68 | 62.87 | |||||||||||
2010 | 43.97 | 47.36 | 54.35 | 54.67 | 59.68 | 72.87 | 86.35 | 83.77 | 77.97 | 66.74 | 47.53 | 42.87 | 61.51 | |||||||||||||
2011 | 43.65 | 43.21 | 46.80 | a | 53.60 | 60.87 | 72.37 | 81.42 | 85.23 | 82.50 | 65.32 | 48.90 | 46.03 | 60.82 | ||||||||||||
2012 | 46.03 | 47.52 | 50.00 | 59.87 | 69.77 | a | 73.53 | 84.39 | 87.52 | 82.57 | 67.00 | a | 51.83 | 38.97 | 63.25 | |||||||||||
2013 | 34.71 | 46.21 | 56.84 | 60.57 | 69.10 | 79.23 | 90.19 | 84.39 | 75.30 | 63.84 | 54.90 | 38.19 | 62.79 | |||||||||||||
2014 | 47.35 | 49.50 | 56.58 | 62.90 | 71.81 | 79.00 | 92.10 | 86.77 | 80.80 | 69.52 | 52.10 | 44.23 | 66.05 | |||||||||||||
2015 | 50.23 | 55.43 | 63.16 | 63.40 | 69.74 | 83.22 | g | ----- | z | 87.58 | 80.13 | 72.40 | a | 46.73 | 38.03 | 62.68 | b | |||||||||
2016 | 39.87 | 54.03 | 53.81 | 67.60 | 69.87 | 79.90 | a | 86.06 | 89.16 | 77.93 | 60.13 | 53.93 | 38.81 | 64.26 | ||||||||||||
2017 | 34.74 | 46.00 | 55.87 | 55.70 | 73.68 | 80.13 | 91.77 | 90.74 | 79.13 | 66.58 | 49.73 | 42.42 | 63.88 | |||||||||||||
2018 | 47.61 | 47.50 | 49.48 | 60.47 | 72.00 | a | 77.97 | 88.94 | 86.52 | 77.17 | 66.63 | a | 53.90 | a | 41.45 | 64.14 | ||||||||||
2019 | 46.65 | 39.32 | 50.87 | 61.83 | 67.90 | 78.60 | 83.61 | 86.45 | 73.93 | 62.00 | 55.13 | 42.19 | 62.37 | |||||||||||||
2020 | 44.03 | 52.76 | 52.68 | 63.80 | 70.07 | a | 78.10 | 86.35 | 88.29 | 84.30 | 72.13 | 49.63 | 43.03 | a | 65.43 | |||||||||||
2021 | 43.13 | 46.79 | 53.55 | 66.00 | 72.16 | 85.70 | 93.13 | 88.23 | 79.67 | 62.06 | 53.57 | 41.42 | 65.45 | |||||||||||||
2022 | 48.37 | a | 54.79 | 60.03 | 57.43 | 65.29 | 78.83 | 90.74 | 90.71 | 81.97 | 72.00 | 43.50 | 37.20 | a | 65.07 | |||||||||||
2023 | 39.61 | 45.36 | 43.32 | 60.30 | 71.29 | 77.23 | 89.52 | 85.71 | 74.40 | 67.06 | 53.13 | 46.29 | 62.77 | |||||||||||||
2024 | 44.19 | 46.66 | 51.94 | 62.12 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.23 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 41.27 | 45.78 | 52.06 | 59.72 | 68.40 | 76.11 | 85.44 | 84.62 | 78.21 | 66.10 | 50.28 | 41.24 | 62.81 | |||||||||||||
S.D. | 4.47 | 4.68 | 4.34 | 4.72 | 4.10 | 4.18 | 3.13 | 3.26 | 3.48 | 4.25 | 4.25 | 3.63 | 1.52 | |||||||||||||
SKEW | -0.29 | -0.19 | 0.51 | -0.32 | -0.55 | -0.30 | 0.01 | -0.31 | -0.19 | 0.07 | 0.15 | -0.25 | 0.24 | |||||||||||||
MAX | 50.23 | 55.43 | 64.74 | 69.57 | 75.65 | 85.70 | 93.13 | 91.38 | 85.23 | 73.87 | 60.90 | 50.97 | 66.05 | |||||||||||||
MIN | 27.45 | 34.71 | 43.32 | 47.20 | 58.55 | 63.40 | 76.93 | 76.48 | 69.80 | 57.03 | 38.74 | 32.12 | 60.06 | |||||||||||||
YRS | 80 | 80 | 71 | 70 | 70 | 66 | 68 | 67 | 67 | 66 | 82 | 79 | 53 |