YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | 25.39 | c | 25.21 | 40.00 | 61.07 | 64.47 | a | 73.73 | 78.13 | 77.26 | 66.43 | 60.52 | 40.30 | 20.74 | 52.77 | |||||||||||
1943 | 18.06 | 27.79 | 30.67 | a | 51.47 | 64.39 | 77.10 | 81.87 | 78.61 | 66.10 | 59.80 | a | 33.26 | g | 29.16 | 53.18 | a | |||||||||
1944 | 33.74 | d | 31.62 | c | 33.32 | c | 51.17 | 71.83 | b | 77.97 | a | 78.94 | 82.20 | a | 69.40 | 60.63 | a | 43.50 | f | 25.28 | f | 59.08 | b | |||
1945 | 21.04 | e | 28.16 | c | 50.27 | a | 52.45 | a | 61.90 | 71.00 | a | 77.42 | 78.29 | 68.93 | c | 56.07 | a | 40.30 | g | 21.36 | f | 56.55 | b | |||
1946 | 27.33 | j | 28.43 | e | 50.53 | a | 60.10 | a | 65.78 | d | 74.93 | 80.84 | 77.10 | a | 70.19 | c | 62.11 | d | 42.38 | d | 28.83 | g | 61.24 | b | ||
1947 | 29.80 | f | 25.24 | c | 35.57 | c | 50.25 | b | 61.47 | a | 72.59 | a | 81.53 | a | 86.03 | 70.67 | 68.47 | a | 33.96 | c | 26.81 | d | 55.69 | a | ||
1948 | 18.08 | f | 25.04 | e | 34.86 | b | 57.45 | a | 65.81 | 73.43 | 79.55 | 77.84 | 74.27 | 57.55 | 42.50 | 27.13 | 55.95 | a | ||||||||
1949 | 24.42 | 23.96 | 34.35 | 55.10 | 70.35 | 80.47 | 83.42 | 82.26 | 67.24 | a | 62.55 | 41.30 | 27.65 | 54.42 | ||||||||||||
1950 | 20.23 | 25.64 | 29.57 | a | 43.13 | 65.10 | ----- | z | ----- | z | 76.58 | 70.64 | b | 64.00 | a | 36.86 | a | 21.58 | 45.33 | b | ||||||
1951 | 21.84 | 25.39 | 30.67 | a | 48.67 | 73.52 | 74.90 | 80.61 | 75.10 | 65.97 | 57.77 | 34.03 | 24.84 | 51.11 | ||||||||||||
1952 | 25.84 | 32.31 | 35.06 | 60.37 | 68.74 | 79.27 | 83.52 | 78.52 | 73.55 | a | 56.00 | 43.83 | 30.68 | 55.64 | ||||||||||||
1953 | 26.58 | 27.71 | 39.03 | 50.33 | 71.55 | 80.00 | 81.87 | 81.65 | 72.72 | a | 68.61 | 49.10 | a | 29.61 | 56.56 | |||||||||||
1954 | 20.94 | 38.71 | 36.68 | 58.07 | 62.20 | a | 79.53 | 81.55 | 78.42 | 68.17 | a | 55.52 | 44.13 | 29.48 | 54.45 | |||||||||||
1955 | 22.45 | 25.46 | 36.35 | 63.77 | 74.00 | b | 76.03 | 86.19 | ----- | z | 73.37 | 60.32 | 35.34 | a | 22.94 | 52.38 | a | |||||||||
1956 | 26.26 | 27.10 | 35.16 | 51.80 | 68.61 | 81.37 | 77.23 | a | 78.81 | 69.27 | 68.13 | 41.30 | 29.71 | 54.56 | ||||||||||||
1957 | 17.68 | 29.11 | 40.23 | 57.50 | 67.94 | 77.67 | 84.39 | 79.65 | 69.13 | 57.19 | 38.65 | d | 31.35 | 54.21 | ||||||||||||
1958 | 27.19 | 24.86 | 40.61 | 58.60 | 70.71 | 72.40 | 79.35 | 80.97 | 72.26 | c | 61.81 | 44.37 | 21.52 | 54.55 | ||||||||||||
1959 | 18.32 | 26.41 | a | 41.94 | 56.63 | 73.19 | 79.10 | 81.97 | 82.35 | 71.97 | 52.35 | 33.52 | a | 34.94 | 54.39 | |||||||||||
1960 | 24.34 | b | 29.28 | 33.61 | 57.13 | 67.19 | 76.27 | 82.77 | 80.71 | 72.37 | 60.16 | 43.20 | 26.61 | 54.47 | ||||||||||||
1961 | 24.17 | a | 36.14 | 42.84 | 51.30 | 68.23 | 79.93 | 81.71 | 82.74 | 70.63 | 62.19 | 41.20 | 25.16 | 55.52 | ||||||||||||
1962 | 19.00 | a | 23.71 | 38.58 | 54.63 | 70.52 | 76.13 | 79.37 | a | 80.45 | 67.93 | 62.26 | 43.21 | a | 27.83 | a | 53.64 | |||||||||
1963 | 13.20 | a | 22.64 | 43.32 | 59.67 | 67.84 | 80.67 | 84.74 | 78.48 | 73.12 | e | 70.48 | 49.62 | f | 19.97 | 55.83 | a | |||||||||
1964 | 29.71 | 33.93 | 37.39 | 58.00 | 74.87 | 79.13 | 88.10 | b | 80.06 | 68.47 | 58.19 | 44.69 | a | 22.71 | 56.27 | |||||||||||
1965 | 20.71 | 24.36 | 31.13 | 50.07 | 72.55 | 76.48 | c | 80.57 | a | 77.87 | 63.67 | 61.23 | 41.40 | 32.74 | 52.73 | |||||||||||
1966 | 14.83 | b | 28.82 | 43.97 | 51.90 | 65.32 | 80.43 | 85.74 | 77.55 | 72.61 | b | 59.87 | 39.33 | 27.06 | 53.95 | |||||||||||
1967 | 26.45 | 22.04 | 40.26 | 54.73 | 64.00 | 77.10 | 80.00 | 77.55 | 73.43 | 57.68 | 36.96 | d | 30.32 | 53.38 | ||||||||||||
1968 | 23.48 | 26.17 | 51.48 | 59.97 | 64.77 | 76.27 | 80.42 | 80.84 | 69.73 | 60.23 | 41.53 | 26.77 | 55.14 | |||||||||||||
1969 | 20.16 | 30.57 | 36.87 | 59.03 | 71.32 | 69.67 | 80.55 | 84.48 | 73.27 | 56.39 | 41.53 | 28.16 | 54.33 | |||||||||||||
1970 | 17.16 | 28.61 | 36.87 | 58.40 | 69.77 | 79.73 | 84.30 | a | 82.45 | 71.37 | 59.61 | 38.67 | 28.23 | 54.60 | ||||||||||||
1971 | 16.58 | 27.00 | 35.94 | 57.77 | 67.39 | 81.83 | 78.45 | 78.48 | 72.77 | 64.55 | 42.10 | a | 27.52 | 54.20 | ||||||||||||
1972 | 19.65 | 23.31 | 35.52 | 52.23 | 75.33 | a | 78.23 | 80.29 | 78.57 | a | 68.60 | 55.77 | 37.73 | 21.71 | 52.25 | |||||||||||
1973 | 28.19 | 29.96 | 47.52 | 54.33 | 63.71 | 79.03 | 83.47 | a | 82.17 | a | 69.33 | 65.10 | a | 41.77 | 26.61 | 55.93 | ||||||||||
1974 | 22.97 | 28.39 | 37.39 | 58.40 | 64.37 | a | 75.17 | 85.71 | 78.94 | 67.43 | 59.32 | 43.33 | 32.58 | 54.50 | ||||||||||||
1975 | 25.84 | 28.00 | 35.42 | 47.67 | 73.40 | a | 76.70 | 82.14 | b | 78.16 | 64.97 | a | 62.83 | a | 46.54 | b | 29.00 | f | 56.51 | a | ||||||
1976 | 20.72 | b | 36.66 | 41.60 | a | 62.25 | b | 70.42 | 82.40 | 85.43 | a | 83.71 | 75.17 | 57.15 | d | 37.18 | b | 19.65 | 56.03 | |||||||
1977 | 11.53 | a | 31.71 | 46.58 | 64.93 | 79.40 | a | 76.86 | a | 83.71 | 76.61 | 69.00 | 59.10 | a | 40.61 | b | 24.52 | b | 55.38 | |||||||
1978 | 19.47 | a | 23.41 | a | 41.13 | 55.48 | a | 74.63 | a | 78.65 | g | 79.39 | 80.39 | 76.28 | a | 58.29 | 41.73 | 24.84 | 52.28 | a | ||||||
1979 | 15.07 | b | 21.46 | b | 38.16 | 52.13 | 64.61 | 76.47 | 81.65 | 77.13 | 74.07 | b | 54.94 | 39.60 | 35.13 | 52.53 | ||||||||||
1980 | 22.80 | a | 26.48 | 36.10 | a | 59.69 | a | 75.35 | 78.10 | 85.53 | a | 79.67 | a | 70.20 | 53.55 | 44.27 | 27.50 | a | 54.94 | |||||||
1981 | 29.40 | a | 33.30 | a | 45.19 | 59.27 | 68.55 | 76.90 | 80.77 | 78.71 | 70.13 | 56.45 | 47.66 | a | 26.71 | 56.09 | ||||||||||
1982 | 15.30 | a | 26.75 | 36.55 | 52.90 | 74.26 | 73.23 | 83.94 | 79.68 | 69.70 | 59.87 | a | 40.64 | b | 32.65 | 53.79 | ||||||||||
1983 | 27.17 | a | 33.29 | 41.07 | d | 50.76 | e | 65.52 | d | 78.57 | b | 88.04 | g | 85.63 | a | 74.93 | b | 60.15 | d | 44.21 | b | 18.96 | c | 52.75 | a | |
1984 | 24.73 | e | 38.39 | a | 38.31 | b | 58.57 | b | 68.60 | a | 80.07 | 82.55 | b | 84.93 | b | 75.74 | c | 62.66 | b | 42.46 | b | 27.89 | c | 57.08 | ||
1985 | 25.19 | d | 25.38 | b | ----- | z | 63.15 | c | 76.30 | d | 76.43 | b | 82.53 | a | 77.62 | b | 70.70 | c | 62.48 | d | 35.27 | 21.90 | a | 56.09 | a | |
1986 | 26.08 | g | 28.92 | c | 46.63 | d | 62.90 | a | 72.48 | 79.50 | f | 82.71 | 77.31 | b | 69.14 | b | 59.50 | e | 37.78 | c | 29.35 | 56.67 | b | |||
1987 | 28.00 | c | 38.85 | b | 47.21 | b | 64.96 | b | 73.87 | 82.18 | b | 83.81 | 77.13 | a | 72.63 | c | 52.35 | 44.67 | 31.42 | 58.09 | ||||||
1988 | 20.80 | a | 25.52 | 41.68 | c | 59.89 | b | 77.36 | c | 83.93 | b | 89.23 | 84.00 | 71.55 | a | 53.23 | a | 41.12 | d | 28.07 | a | 56.36 | ||||
1989 | 31.34 | b | 20.27 | b | 34.40 | a | 53.24 | a | 68.17 | b | 74.79 | b | 82.48 | 78.52 | b | 71.32 | b | 60.04 | f | 36.58 | d | 18.41 | b | 51.78 | a | |
1990 | 33.39 | 32.07 | 45.06 | 57.43 | b | 66.27 | a | 76.97 | 80.03 | 78.45 | 72.50 | 59.84 | 48.87 | 27.52 | b | 56.53 | ||||||||||
1991 | 20.61 | 33.61 | 42.67 | a | 62.41 | a | 71.47 | a | 80.10 | 79.48 | 81.06 | 67.20 | 57.39 | 33.33 | 28.52 | 54.82 | ||||||||||
1992 | 27.53 | a | 33.43 | a | 39.87 | 50.37 | 72.30 | a | 72.00 | a | 73.00 | a | 74.65 | 66.87 | 55.30 | a | 36.03 | 27.42 | 52.40 | |||||||
1993 | 23.60 | a | 25.19 | b | 38.39 | 48.57 | 64.67 | d | 70.30 | 76.79 | b | 77.42 | 62.07 | 54.13 | 35.32 | b | 26.41 | d | 50.24 | |||||||
1994 | 12.10 | a | 19.27 | b | 39.84 | 53.12 | e | 68.39 | c | 77.08 | e | 77.55 | t | 75.07 | d | 71.68 | e | 59.80 | f | 45.42 | f | 31.79 | g | 52.07 | d | |
1995 | 24.60 | f | 27.84 | c | 41.88 | f | 47.27 | h | 66.00 | i | 81.36 | h | 81.85 | k | 81.30 | h | 68.90 | j | 58.86 | i | 32.00 | j | 23.70 | k | 27.84 | k |
1996 | 20.95 | i | 22.17 | e | 32.41 | i | 51.74 | g | 63.91 | i | 74.70 | j | 76.82 | i | 79.27 | i | 70.35 | j | 57.65 | h | 32.62 | i | 24.85 | k | 22.17 | k |
1997 | 19.62 | e | 30.35 | h | 37.75 | k | 53.04 | d | 60.95 | j | 77.86 | h | 78.27 | i | 74.50 | i | 70.29 | i | 56.26 | h | 36.50 | j | 34.52 | j | 36.33 | j |
1998 | 26.90 | j | 39.95 | h | 39.43 | h | 60.38 | i | 77.38 | j | 72.62 | i | 81.91 | i | 80.30 | k | 74.32 | h | 57.52 | h | 45.67 | i | 37.55 | i | ----- | z |
1999 | 19.45 | k | 37.56 | j | 43.36 | f | 59.18 | h | 68.41 | i | 74.70 | g | 84.09 | i | 77.14 | j | 70.71 | f | 58.86 | j | 53.11 | l | 32.20 | k | ----- | z |
2000 | 25.21 | l | 36.25 | i | 51.37 | l | 55.42 | k | 69.27 | i | 73.55 | j | 77.89 | l | 80.05 | j | 70.33 | i | 62.37 | l | 39.20 | j | 15.32 | l | ----- | z |
2001 | 28.85 | k | 24.58 | i | 37.05 | j | 56.21 | k | 69.68 | i | 75.05 | k | 82.65 | k | 81.00 | h | 69.70 | j | 57.57 | j | 52.42 | k | 33.24 | n | ----- | z |
2002 | 31.05 | j | 34.89 | i | 33.81 | o | 52.70 | g | 63.10 | k | 74.90 | j | 82.25 | k | 77.35 | k | 70.94 | l | 48.25 | g | 39.94 | l | 33.00 | n | ----- | z |
2003 | 22.21 | l | 22.84 | i | 40.14 | i | 57.77 | h | 65.73 | i | 74.94 | m | 78.30 | k | 84.47 | l | 72.73 | h | 58.59 | i | 40.88 | n | 33.81 | o | ----- | z |
2004 | 18.68 | i | 31.68 | j | 42.68 | i | 57.65 | g | 66.94 | m | 73.88 | f | 78.67 | g | 74.43 | h | 74.60 | j | 58.96 | d | 43.29 | b | 27.14 | b | 43.13 | i |
2005 | 21.83 | b | 31.43 | 38.20 | a | 58.97 | 65.11 | c | 79.23 | 81.71 | 77.77 | 73.41 | a | 60.00 | a | 44.76 | e | 24.34 | b | 54.73 | ||||||
2006 | 34.23 | a | 26.92 | b | 41.37 | a | 62.75 | b | 69.31 | b | 77.83 | a | 86.13 | 77.61 | 65.80 | 52.82 | c | 42.50 | 33.80 | a | 55.92 | |||||
2007 | 25.75 | c | 19.96 | a | 42.67 | a | 55.48 | a | 71.45 | b | 78.77 | 80.73 | a | 77.32 | 70.63 | 60.77 | 40.15 | d | 23.03 | a | 53.89 | |||||
2008 | 22.77 | a | 22.81 | c | 34.29 | 52.10 | 63.93 | b | 73.17 | 79.27 | a | 77.90 | 69.20 | 55.97 | a | 38.03 | 20.82 | c | 50.85 | |||||||
2009 | 14.90 | a | 29.07 | 39.06 | 54.30 | 66.55 | 73.97 | 73.80 | a | 75.29 | 74.07 | 48.74 | 44.13 | 24.96 | f | 53.99 | a | |||||||||
2010 | 22.00 | 29.14 | 50.06 | 62.67 | 68.81 | 73.60 | 80.10 | 80.61 | 66.03 | 60.35 | 41.43 | 23.39 | 54.85 | |||||||||||||
2011 | 17.90 | 26.29 | 36.13 | 50.37 | 63.90 | 73.97 | 83.61 | 78.61 | 67.63 | 61.35 | 44.10 | 32.32 | 53.02 | |||||||||||||
2012 | 27.55 | 34.17 | 54.32 | 56.97 | 71.29 | 78.07 | 85.16 | 79.94 | 71.27 | 54.16 | 43.03 | 30.94 | 57.24 | |||||||||||||
2013 | 23.77 | 26.23 | b | 32.84 | 44.07 | 65.23 | 72.77 | 79.58 | 79.67 | a | 73.47 | 56.29 | 35.80 | 18.55 | 50.69 | |||||||||||
2014 | 15.94 | 17.29 | 30.13 | 48.60 | 65.58 | 76.50 | 75.61 | 77.29 | 68.20 | 55.58 | 30.70 | 28.97 | 49.20 | |||||||||||||
2015 | 22.47 | a | 18.89 | 40.61 | 56.80 | 66.61 | 74.53 | 78.74 | 74.29 | 73.83 | 58.97 | b | 46.00 | 34.90 | 53.89 | |||||||||||
2016 | 22.23 | 29.03 | 44.68 | 52.57 | 67.48 | 74.83 | 79.32 | 77.32 | 71.20 | 59.94 | 50.80 | 24.68 | 54.51 | |||||||||||||
2017 | 25.00 | 35.86 | 38.03 | 55.87 | 63.55 | 75.70 | 79.61 | 73.71 | 72.04 | c | 58.65 | 37.90 | 23.55 | 53.29 | ||||||||||||
2018 | 22.71 | 24.36 | 38.61 | 40.23 | 75.26 | 76.33 | 80.77 | 78.42 | 70.80 | 50.23 | 32.28 | a | 30.19 | 51.68 | ||||||||||||
2019 | 21.32 | 18.57 | 33.97 | 49.90 | 60.22 | d | 73.03 | 79.81 | j | 75.90 | 70.63 | 52.29 | 33.67 | 28.61 | 47.10 | a | ||||||||||
2020 | 27.23 | 28.90 | 41.52 | 51.07 | 64.28 | b | 77.63 | 81.32 | 78.65 | 66.63 | 48.71 | 46.23 | 31.13 | 53.61 | ||||||||||||
2021 | 26.48 | 20.18 | 48.03 | 54.50 | 65.65 | 81.10 | 80.35 | 78.13 | 72.17 | 63.65 | 42.37 | 30.97 | 55.30 | |||||||||||||
2022 | 18.39 | 23.82 | 36.65 | 46.47 | 67.06 | 76.50 | 79.42 | 76.94 | 70.97 | 57.35 | 44.00 | 24.94 | 51.87 | |||||||||||||
2023 | 26.77 | 29.21 | 37.23 | 51.37 | 69.06 | 80.20 | 79.29 | 78.29 | 72.40 | 57.48 | 43.30 | 38.42 | 55.25 | |||||||||||||
2024 | 25.80 | a | 41.38 | 44.55 | 54.25 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.24 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.71 | 27.71 | 39.53 | 55.11 | 68.68 | 76.93 | 81.39 | 79.05 | 70.43 | 58.79 | 40.83 | 27.16 | 54.22 | |||||||||||||
S.D. | 4.98 | 5.11 | 5.41 | 5.27 | 4.25 | 3.08 | 3.03 | 2.65 | 2.94 | 4.37 | 4.29 | 4.39 | 1.84 | |||||||||||||
SKEW | -0.01 | 0.42 | 0.53 | -0.29 | 0.32 | -0.15 | -0.06 | 0.63 | -0.42 | 0.16 | -0.22 | 0.01 | -0.52 | |||||||||||||
MAX | 34.23 | 41.38 | 54.32 | 64.96 | 79.40 | 83.93 | 89.23 | 86.03 | 76.28 | 70.48 | 50.80 | 38.42 | 58.09 | |||||||||||||
MIN | 11.53 | 17.29 | 29.57 | 40.23 | 60.22 | 69.67 | 73.00 | 73.71 | 62.07 | 48.71 | 30.70 | 18.41 | 49.20 | |||||||||||||
YRS | 70 | 75 | 72 | 73 | 72 | 69 | 68 | 71 | 72 | 71 | 68 | 67 | 54 |