YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1931 | 38.33 | a | 42.26 | a | 51.31 | b | 62.63 | 76.37 | a | 76.38 | f | 91.32 | 89.16 | 73.87 | 61.89 | d | 42.00 | d | 31.90 | 60.10 | a | |||||
1932 | 32.79 | c | 37.37 | b | 48.23 | 63.76 | e | 70.64 | f | 82.93 | a | 83.26 | 85.55 | b | 79.07 | b | 61.77 | 48.87 | 33.67 | a | 59.75 | a | ||||
1933 | 37.35 | 30.30 | a | 49.13 | 61.52 | a | 65.90 | 81.82 | h | 91.24 | f | 89.74 | d | 71.52 | c | 66.45 | 46.97 | a | 44.62 | b | 56.35 | b | ||||
1934 | 44.83 | b | 49.75 | 60.84 | 72.47 | 76.31 | e | 81.12 | f | 88.80 | f | 90.48 | d | 73.66 | a | 63.43 | a | 48.97 | 37.81 | d | 61.85 | b | ||||
1935 | 40.18 | c | 44.04 | a | 48.97 | b | 58.83 | 72.86 | b | 80.12 | e | 87.63 | a | 85.89 | c | 81.67 | 61.16 | 39.53 | 33.43 | a | 61.19 | |||||
1936 | 36.77 | a | 25.62 | 50.10 | a | 66.26 | c | 77.74 | 80.77 | d | 90.27 | a | 88.38 | g | 76.67 | c | 69.00 | 45.27 | 39.26 | 59.79 | a | |||||
1937 | 18.57 | a | 35.81 | a | 54.87 | a | 58.81 | d | 73.74 | d | 78.31 | d | 91.19 | e | 83.33 | g | 78.63 | c | 67.10 | a | 48.03 | 37.55 | 58.42 | a | ||
1938 | 36.21 | c | 39.32 | 50.55 | 63.90 | 73.10 | b | 81.47 | 92.58 | e | 85.45 | b | 84.43 | 64.87 | 43.53 | 39.41 | b | 62.90 | ||||||||
1939 | 42.32 | f | 37.86 | 53.32 | 66.60 | 76.16 | 77.23 | 90.61 | 91.70 | d | 79.69 | a | 63.93 | b | 53.73 | 44.48 | 66.85 | a | ||||||||
1940 | 35.84 | 43.07 | 57.48 | b | 63.96 | c | 77.31 | e | 87.54 | f | 88.66 | b | 89.23 | e | 78.63 | 65.10 | a | 39.30 | 39.58 | 61.65 | a | |||||
1941 | 36.27 | a | 48.52 | a | 60.42 | 66.48 | a | 69.23 | a | 76.10 | 93.03 | 85.14 | b | 69.24 | a | 59.60 | a | 50.43 | 40.00 | 62.87 | ||||||
1942 | 29.58 | 41.35 | e | 53.87 | 64.97 | a | 67.97 | 75.43 | 90.45 | 91.10 | 81.90 | a | 66.90 | a | 41.57 | 36.03 | 61.76 | |||||||||
1943 | 28.67 | a | 40.14 | 48.63 | a | 63.67 | 67.06 | 74.72 | a | 90.21 | c | 84.73 | a | 83.33 | 63.74 | 45.33 | 35.43 | a | 60.47 | |||||||
1944 | 37.87 | 40.34 | 51.30 | a | 64.62 | f | 72.81 | 78.83 | 89.87 | a | 85.68 | 81.00 | a | 71.97 | 43.97 | 32.57 | a | 62.38 | a | |||||||
1945 | 38.07 | a | 44.32 | 49.44 | f | 60.59 | c | 73.62 | j | 78.48 | e | 93.04 | g | 90.54 | g | 73.08 | f | 67.25 | g | 42.96 | c | 35.81 | d | 50.04 | f | |
1946 | 41.04 | h | 45.54 | d | 52.72 | f | 64.33 | f | 75.70 | d | 78.36 | e | 89.04 | h | 89.16 | f | 74.58 | d | 57.07 | d | 43.88 | e | 39.00 | d | 59.16 | e |
1947 | 35.04 | g | 47.67 | d | 58.07 | a | 66.48 | e | 78.68 | 77.93 | a | 90.95 | l | 85.58 | e | 76.88 | d | 59.89 | c | 43.59 | h | 39.00 | e | 65.58 | c | |
1948 | 36.48 | f | 39.40 | d | 50.79 | c | 58.33 | 65.87 | 81.27 | ----- | z | 83.06 | 76.60 | 64.03 | 45.93 | 30.35 | 59.56 | b | ||||||||
1949 | 19.81 | 38.21 | 53.68 | 69.87 | 79.16 | 82.70 | 89.61 | 88.13 | 80.20 | 60.90 | 51.80 | 39.81 | 62.82 | |||||||||||||
1950 | 20.13 | 37.21 | 48.84 | 60.10 | 70.84 | 77.93 | 91.16 | 90.74 | 82.07 | 59.52 | 45.20 | 40.55 | 60.36 | |||||||||||||
1951 | 35.68 | 42.14 | 47.58 | 66.50 | 74.29 | 80.77 | 91.87 | 88.29 | 80.13 | 60.68 | 45.60 | 31.10 | 62.05 | |||||||||||||
1952 | 30.65 | 43.41 | 52.52 | 68.10 | 74.94 | 80.43 | 92.13 | 89.10 | 83.83 | 74.06 | 43.67 | 37.68 | 64.21 | |||||||||||||
1953 | 46.23 | 48.00 | 56.48 | 62.27 | 70.71 | 75.10 | 90.42 | 88.10 | 82.80 | 67.81 | 53.03 | 41.52 | 65.20 | |||||||||||||
1954 | 34.42 | 41.86 | 51.55 | 60.93 | 74.48 | 75.87 | 87.94 | 83.94 | 76.87 | 63.58 | 52.50 | 38.16 | 61.84 | |||||||||||||
1955 | 33.87 | 40.36 | 46.97 | 55.90 | a | 67.87 | 83.83 | 86.26 | 89.55 | 78.83 | 62.58 | 37.73 | 34.77 | 59.88 | ||||||||||||
1956 | 37.10 | 31.55 | 49.77 | 67.57 | 76.00 | 78.53 | 92.94 | 88.93 | a | 80.60 | 59.68 | 41.27 | 38.16 | 61.84 | ||||||||||||
1957 | 22.61 | 38.93 | 51.94 | 64.53 | 76.65 | 81.87 | 87.65 | 84.52 | 83.27 | 59.84 | 48.17 | 43.84 | 61.98 | |||||||||||||
1958 | 41.73 | a | 51.96 | 52.74 | 60.07 | 81.48 | 85.47 | 94.26 | 93.71 | 76.76 | a | 68.03 | 47.33 | 38.48 | 66.00 | |||||||||||
1959 | 38.90 | 41.46 | 54.35 | 65.07 | 69.10 | 81.23 | 92.77 | 83.90 | 72.07 | 61.63 | a | 44.70 | 38.55 | 61.98 | ||||||||||||
1960 | 29.87 | 44.39 | a | 54.45 | 61.60 | 68.52 | 82.63 | 96.42 | 83.45 | 80.03 | 65.03 | 48.10 | 33.81 | 62.36 | ||||||||||||
1961 | 39.23 | 48.71 | 53.58 | 60.93 | 71.42 | 89.17 | 93.65 | 95.16 | 74.60 | 62.39 | 43.00 | 36.35 | 64.02 | |||||||||||||
1962 | 36.77 | 44.86 | 49.97 | 67.07 | 65.94 | 81.00 | 89.19 | 84.68 | 80.97 | 62.29 | 48.30 | 41.61 | 62.72 | |||||||||||||
1963 | 32.13 | 47.29 | 55.65 | 58.20 | 72.45 | 80.87 | 85.00 | 88.97 | 85.73 | 68.55 | 48.70 | 33.06 | 63.05 | |||||||||||||
1964 | 39.45 | 46.10 | 51.71 | 60.97 | 71.17 | a | 79.47 | 89.71 | 82.65 | 75.83 | 67.26 | 41.87 | 33.13 | 61.61 | ||||||||||||
1965 | 34.87 | a | 46.89 | 53.26 | 65.47 | 72.13 | 81.43 | 90.45 | 87.81 | 74.67 | 70.81 | 50.60 | 38.93 | a | 63.94 | |||||||||||
1966 | 38.71 | 46.07 | 54.26 | 64.17 | 77.68 | 78.67 | 86.65 | 88.16 | 82.50 | 64.16 | 50.13 | 42.23 | 64.45 | |||||||||||||
1967 | 43.58 | 50.43 | 52.45 | 56.83 | 70.65 | 83.00 | 91.19 | 95.55 | 86.83 | 65.26 | 48.07 | 37.77 | 65.13 | |||||||||||||
1968 | 40.35 | 49.83 | 57.68 | 61.23 | 73.13 | 80.83 | 91.63 | a | 81.84 | 78.47 | 60.26 | 45.93 | 36.00 | 63.10 | ||||||||||||
1969 | 24.81 | 36.54 | 53.23 | 62.87 | 75.65 | 84.87 | 87.81 | 86.48 | 78.37 | 60.97 | 48.63 | 36.29 | 61.37 | |||||||||||||
1970 | 34.90 | 46.96 | 52.00 | 56.57 | 72.94 | 86.13 | 91.58 | 90.97 | 72.73 | 62.26 | 47.50 | 37.10 | 62.64 | |||||||||||||
1971 | 40.71 | 46.18 | 47.61 | 61.90 | 74.84 | 74.90 | 90.74 | 94.13 | 72.62 | a | 61.45 | 46.40 | 35.84 | 62.28 | ||||||||||||
1972 | 36.29 | 41.38 | 56.19 | 58.97 | 74.26 | 81.17 | 87.52 | 90.45 | 72.80 | 64.81 | 47.60 | 33.84 | 62.11 | |||||||||||||
1973 | 37.71 | 45.39 | 56.00 | 64.60 | 75.42 | 81.07 | 90.81 | 87.71 | 77.83 | 62.10 | 41.93 | 42.16 | 63.56 | |||||||||||||
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.22 | u | 61.84 | 46.27 | 39.77 | 49.29 | i | |||
1976 | 39.87 | 44.24 | 50.68 | 61.17 | 73.58 | 77.00 | 87.03 | 83.10 | 83.53 | 65.55 | 48.10 | 39.23 | 62.76 | |||||||||||||
1977 | 28.45 | 48.64 | 51.87 | 70.37 | 68.19 | 85.52 | a | 85.94 | 90.90 | 70.63 | 63.16 | 45.00 | 38.35 | 62.25 | ||||||||||||
1978 | 35.90 | 43.68 | 56.77 | 61.57 | 68.06 | 82.37 | 88.17 | a | 83.19 | 73.13 | 65.97 | 39.60 | 31.58 | 60.83 | ||||||||||||
1979 | 20.65 | 39.41 | a | 56.26 | 61.17 | 73.61 | 82.00 | 89.23 | 87.61 | 81.80 | 65.94 | 40.43 | 42.42 | 61.71 | ||||||||||||
1980 | 29.23 | 41.52 | 50.55 | 66.73 | 70.31 | b | 74.67 | 88.33 | a | 82.10 | 76.87 | 64.03 | 46.10 | 41.26 | 60.97 | |||||||||||
1981 | 42.45 | 44.21 | 56.94 | 61.70 | 68.84 | 74.37 | 86.26 | 92.10 | 78.03 | 61.71 | 50.83 | 37.81 | 62.94 | |||||||||||||
1982 | 33.42 | 44.14 | 53.19 | 58.70 | 70.77 | a | 82.07 | 85.81 | 87.52 | 75.50 | 60.61 | 42.00 | 36.06 | 60.82 | ||||||||||||
1983 | 42.97 | 48.93 | 55.32 | 61.69 | a | 75.19 | 78.23 | 84.10 | a | 89.55 | 72.83 | 63.61 | 48.13 | 26.55 | 62.26 | |||||||||||
1984 | 37.13 | 43.07 | a | 55.13 | 58.20 | 66.45 | 76.62 | a | 90.68 | 89.43 | a | 74.70 | 61.10 | a | 45.27 | 29.87 | 60.64 | |||||||||
1985 | 26.71 | 37.67 | a | 52.74 | 66.77 | 77.27 | a | 83.33 | 97.84 | 85.97 | 71.17 | 59.94 | 29.03 | a | 22.55 | 59.25 | ||||||||||
1986 | 37.48 | b | 41.63 | a | 55.93 | a | 60.70 | 72.42 | 84.75 | b | 82.13 | 91.52 | 70.03 | 66.77 | 44.30 | 33.16 | 61.74 | |||||||||
1987 | 32.65 | 45.39 | 54.83 | b | 68.07 | 75.55 | 84.17 | a | 84.87 | 86.31 | b | 83.90 | 69.19 | 49.93 | 35.07 | a | 64.16 | |||||||||
1988 | 33.97 | 47.75 | a | 53.76 | b | 64.37 | 71.81 | 77.83 | 87.30 | a | 86.97 | b | 77.37 | 71.26 | 47.38 | a | 34.00 | a | 62.81 | |||||||
1989 | 40.26 | 31.74 | a | 49.77 | 65.90 | a | 69.30 | a | 82.20 | 88.70 | a | 82.06 | 81.07 | a | 62.23 | 48.67 | 34.97 | 61.41 | ||||||||
1990 | 41.37 | a | 42.32 | 56.45 | 66.30 | 68.53 | a | 78.34 | a | 91.69 | b | 85.71 | c | 85.15 | c | 59.70 | a | 50.30 | 30.80 | a | 63.06 | |||||
1991 | 33.30 | a | 50.44 | a | 50.73 | a | 62.70 | 66.81 | 74.04 | b | 88.34 | b | 88.79 | c | 82.30 | 63.16 | 42.72 | a | 40.83 | a | 62.01 | |||||
1992 | 39.50 | a | 49.11 | a | 61.43 | a | 64.31 | a | 78.97 | 85.56 | e | 84.54 | c | 88.17 | a | 74.64 | b | 65.54 | c | 43.03 | 33.00 | a | 63.98 | |||
1993 | 28.29 | 34.70 | a | 48.43 | a | 58.79 | a | 76.83 | b | 76.00 | a | 77.53 | a | 83.39 | 78.97 | 66.97 | a | 42.90 | a | 37.13 | 59.16 | |||||
1994 | 44.87 | a | 41.44 | c | 58.27 | a | 65.52 | a | 73.52 | b | 79.97 | 91.87 | 88.33 | a | 82.11 | b | 61.48 | d | 42.60 | 39.17 | a | 64.09 | ||||
1995 | 40.27 | a | 49.57 | 53.58 | 61.20 | 73.48 | 76.72 | a | 88.00 | g | 82.57 | a | 80.86 | a | 58.23 | 50.24 | a | 36.27 | a | 60.27 | a | |||||
1996 | 34.63 | a | 39.17 | 51.53 | a | 62.70 | 64.86 | b | 79.07 | a | 91.43 | a | 88.03 | b | 73.48 | a | 59.68 | 43.23 | 33.55 | 60.11 | ||||||
1997 | 35.68 | 42.63 | a | 53.70 | a | 59.20 | 73.52 | 75.75 | b | 85.03 | 89.52 | 78.07 | a | 61.06 | 48.30 | ----- | z | 63.86 | a | |||||||
1998 | 39.60 | a | 47.86 | 54.32 | 63.13 | 70.61 | 78.83 | a | 93.87 | 90.81 | 83.80 | 63.47 | a | 48.03 | 36.00 | c | 64.19 | |||||||||
1999 | 41.10 | 45.22 | a | 52.87 | a | 61.40 | 68.45 | 76.38 | a | 86.26 | 88.35 | 78.40 | 63.30 | a | 51.80 | 39.71 | 62.77 | |||||||||
2000 | 37.06 | 44.24 | 51.61 | 67.27 | 70.23 | 79.70 | 86.74 | 86.70 | a | 74.52 | a | 60.90 | 38.07 | 31.16 | 60.68 | |||||||||||
2001 | 33.77 | 39.61 | 54.47 | a | 58.04 | b | 76.07 | a | 75.97 | 86.83 | a | 89.55 | b | 81.23 | 61.13 | a | 49.46 | b | 38.00 | 62.01 | ||||||
2002 | 40.43 | a | 45.61 | 48.93 | a | 61.83 | 68.81 | 81.03 | 90.97 | a | 85.39 | 77.57 | 61.80 | a | 48.57 | b | 40.07 | b | 62.58 | |||||||
2003 | 41.80 | a | 46.30 | a | 54.93 | b | 61.90 | 70.19 | 82.69 | a | 92.50 | a | 89.58 | 81.17 | 69.20 | a | 44.15 | c | 37.03 | 64.29 | ||||||
2004 | 30.65 | 41.89 | a | 60.35 | 67.07 | a | 70.13 | a | 80.86 | a | 90.87 | a | 89.06 | 75.10 | 64.73 | a | 47.37 | 40.42 | 63.21 | |||||||
2005 | 38.07 | b | 49.04 | a | 57.68 | 63.67 | 73.06 | 78.00 | 89.55 | 89.93 | a | 75.13 | 62.62 | b | 43.14 | a | 32.25 | c | 62.68 | |||||||
2006 | 46.23 | 44.15 | a | 52.14 | b | 62.10 | a | 73.32 | 79.87 | 92.57 | a | 87.34 | b | 79.61 | b | 63.43 | c | 46.07 | a | 33.43 | a | 63.35 | ||||
2007 | 33.97 | 42.36 | 57.03 | a | 61.27 | 74.03 | a | 79.54 | b | 92.17 | a | 85.53 | a | 76.07 | c | 61.77 | 45.69 | d | 36.60 | a | 62.17 | |||||
2008 | 32.07 | a | 42.93 | b | 50.68 | 58.20 | 72.97 | b | 79.07 | a | 88.10 | a | 87.68 | c | 78.90 | 63.60 | a | 48.54 | b | 29.58 | 61.02 | |||||
2009 | 34.76 | b | 43.26 | a | 48.52 | b | 61.33 | 72.58 | 80.03 | 91.40 | a | 88.03 | b | 82.14 | a | 57.50 | a | 46.93 | a | 31.67 | a | 61.51 | ||||
2010 | 43.13 | 48.85 | a | 56.07 | b | 62.07 | 66.52 | 75.00 | 87.87 | a | 85.00 | a | 75.50 | 64.03 | 43.47 | 37.45 | 62.08 | |||||||||
2011 | 38.23 | 41.14 | 51.90 | 56.43 | 66.65 | 75.37 | 85.81 | 88.97 | 85.83 | 65.03 | a | 48.03 | 35.39 | 61.56 | ||||||||||||
2012 | 38.55 | 45.17 | 51.87 | 62.80 | 69.97 | 75.23 | 90.29 | 90.13 | a | 80.97 | 62.29 | 51.20 | 42.52 | 63.42 | ||||||||||||
2013 | 32.81 | 47.11 | 55.87 | a | 61.60 | 72.84 | 78.67 | 93.29 | 88.74 | 79.50 | 63.13 | 45.80 | 34.94 | 62.86 | ||||||||||||
2014 | 38.74 | 38.04 | 55.87 | 63.93 | 74.65 | 79.07 | 94.16 | 89.48 | 80.27 | 67.00 | 46.60 | 42.32 | 64.18 | |||||||||||||
2015 | 40.55 | 54.00 | 62.77 | 65.10 | 76.71 | 89.07 | 91.32 | 89.45 | 75.67 | 69.32 | 44.80 | 38.58 | 66.45 | |||||||||||||
2016 | 39.65 | 51.59 | 56.29 | 70.63 | 75.16 | 82.90 | 85.65 | 89.03 | 75.60 | 61.65 | 56.10 | 32.97 | 64.77 | |||||||||||||
2017 | 28.39 | 39.11 | 52.94 | 60.73 | 75.13 | 81.97 | 91.81 | 92.03 | 78.53 | 61.61 | 49.30 | 36.26 | 62.32 | |||||||||||||
2018 | 44.10 | 45.57 | 54.74 | 62.37 | 78.29 | 79.97 | 91.71 | 88.23 | 75.27 | 61.87 | 47.83 | 40.48 | 64.20 | |||||||||||||
2019 | 39.94 | 31.61 | 47.45 | 63.50 | 75.13 | 81.70 | 86.06 | 88.71 | 75.53 | 57.45 | 45.63 | 38.45 | 60.93 | |||||||||||||
2020 | 42.58 | 47.00 | 52.81 | 63.97 | 72.32 | 78.23 | 88.68 | 89.35 | 80.80 | 63.74 | 47.70 | 38.32 | 63.79 | |||||||||||||
2021 | 41.77 | 39.64 | 56.55 | 65.90 | 74.06 | 89.07 | 95.06 | 88.42 | 77.40 | 62.74 | 48.60 | 36.52 | 64.64 | |||||||||||||
2022 | 33.29 | 44.82 | 55.90 | 55.83 | 65.65 | 77.63 | 91.97 | 94.61 | 82.27 | 70.84 | 40.53 | 28.90 | 61.85 | |||||||||||||
2023 | 42.10 | 44.79 | 51.65 | 59.83 | 80.16 | 83.37 | 92.26 | 89.32 | 78.47 | 65.13 | 45.60 | 41.71 | 64.53 | |||||||||||||
2024 | 36.48 | 46.00 | 56.39 | 63.94 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.29 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.03 | 43.23 | 53.48 | 62.82 | 72.58 | 80.01 | 89.56 | 87.95 | 78.27 | 63.65 | 46.06 | 36.65 | 62.56 | |||||||||||||
S.D. | 5.99 | 5.11 | 3.39 | 3.48 | 3.79 | 3.44 | 3.32 | 3.06 | 3.98 | 3.40 | 4.02 | 4.05 | 1.49 | |||||||||||||
SKEW | -0.93 | -0.75 | 0.30 | 0.25 | -0.08 | 0.47 | -0.54 | 0.05 | -0.09 | 0.69 | -0.78 | -0.56 | 0.14 | |||||||||||||
MAX | 46.23 | 54.00 | 62.77 | 72.47 | 81.48 | 89.17 | 97.84 | 95.55 | 86.83 | 74.06 | 56.10 | 44.62 | 66.45 | |||||||||||||
MIN | 18.57 | 25.62 | 46.97 | 55.83 | 64.86 | 74.04 | 77.53 | 81.84 | 69.24 | 57.07 | 29.03 | 22.55 | 59.16 | |||||||||||||
YRS | 88 | 92 | 90 | 89 | 89 | 87 | 84 | 87 | 90 | 91 | 91 | 91 | 76 |