YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.23 | 68.26 | 40.00 | d | 13.65 | 48.03 | h | |||
1964 | 22.03 | 26.38 | 30.83 | a | 53.50 | 68.76 | b | 73.10 | 83.26 | 73.32 | 66.38 | a | 55.00 | b | 38.61 | b | 11.86 | c | 50.25 | |||||||
1965 | 12.52 | b | 17.54 | d | 25.90 | 46.44 | c | 67.25 | k | 75.60 | j | 77.94 | m | 79.52 | h | 57.16 | k | 57.04 | e | 35.35 | d | 29.25 | c | 32.01 | e | |
1966 | 2.03 | 21.50 | d | 36.14 | b | 45.15 | c | 59.33 | a | 75.05 | h | ----- | z | 75.94 | n | 69.00 | f | 55.92 | f | 31.46 | d | 25.28 | m | 32.60 | f | |
1967 | 17.08 | f | 15.25 | d | 37.10 | b | 50.50 | h | 59.07 | b | 73.88 | f | 80.47 | n | 76.95 | k | 71.89 | b | 54.56 | f | 34.23 | h | 22.13 | a | 41.09 | g |
1968 | 16.86 | c | 19.72 | 41.39 | 54.17 | f | ----- | z | 73.35 | j | 76.00 | k | 75.00 | i | 69.67 | o | 54.73 | i | 34.57 | b | 19.66 | b | 26.44 | g | ||
1969 | 10.66 | b | 23.21 | 32.77 | a | 56.52 | i | 66.68 | f | 69.35 | j | 78.70 | h | 81.58 | l | 68.94 | m | 47.55 | i | ----- | z | 24.50 | a | 22.78 | h | |
1970 | 9.23 | a | 21.00 | 29.97 | 47.86 | i | 61.33 | g | 75.23 | h | 83.04 | f | 80.81 | d | 79.83 | f | 56.70 | d | 32.71 | b | 19.27 | e | 35.67 | e | ||
1971 | 6.00 | 25.07 | a | 31.07 | a | 53.03 | 65.17 | a | 78.40 | 76.06 | 78.41 | d | 70.27 | 59.31 | e | 33.89 | c | 20.04 | g | 52.43 | a | |||||
1972 | 5.77 | i | 11.18 | a | 33.29 | c | 47.33 | c | 74.40 | f | 77.83 | f | 76.52 | j | 78.35 | h | 64.38 | i | 54.62 | b | 32.63 | 17.09 | h | 35.81 | g | |
1973 | 22.96 | c | 25.76 | c | 48.48 | f | 51.96 | d | 65.68 | 76.87 | 79.06 | 79.74 | h | 65.91 | g | 58.70 | d | 29.24 | a | 20.19 | d | 47.82 | c | |||
1974 | 12.50 | a | 22.52 | c | 32.20 | a | 51.17 | 59.39 | h | 78.45 | h | 84.24 | j | 74.23 | i | 66.26 | k | 58.68 | i | 31.67 | r | 28.96 | g | 29.60 | h | |
1975 | 21.33 | g | 23.67 | g | 31.88 | g | ----- | z | 69.88 | f | ----- | z | ----- | z | 77.50 | i | 67.05 | j | 58.48 | d | 43.87 | o | 19.59 | n | 58.48 | k |
1976 | ----- | z | 31.95 | i | 37.26 | h | 57.72 | a | 70.33 | d | 80.61 | g | 82.86 | j | 82.96 | h | 70.29 | b | 52.20 | f | 39.24 | m | 13.71 | n | 66.11 | i |
1977 | 8.00 | l | 27.74 | i | 42.18 | i | 59.56 | c | 79.55 | b | 77.91 | g | 83.00 | h | 74.05 | j | 65.29 | p | 59.05 | k | 41.63 | k | 18.29 | n | 69.55 | j |
1978 | 11.44 | f | 19.22 | j | 35.56 | f | 53.81 | i | 73.53 | l | 73.50 | r | 81.00 | o | 78.90 | u | 68.95 | j | ----- | z | 37.72 | l | 17.68 | i | ----- | z |
1979 | ----- | z | 16.21 | i | 36.54 | g | 48.08 | f | 57.47 | n | 74.31 | n | 82.93 | q | 74.11 | l | 72.69 | n | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | 32.69 | b | 60.30 | g | 78.07 | d | 79.44 | n | 83.33 | m | ----- | z | ----- | z | ----- | z | 42.10 | t | ----- | z | 55.38 | j |
1981 | ----- | z | 27.95 | i | ----- | z | 56.75 | f | 68.76 | j | 73.17 | g | 83.90 | u | ----- | z | 66.63 | k | 52.10 | j | 46.17 | f | 20.81 | d | 20.81 | k |
1982 | 5.41 | b | 19.85 | b | 31.82 | c | 50.08 | e | 70.33 | d | 70.75 | f | 81.42 | e | 77.15 | d | 66.19 | c | 55.33 | a | 35.62 | i | 26.92 | f | 50.84 | c |
1983 | 22.16 | 27.50 | d | 37.15 | d | 52.68 | b | 66.58 | e | 75.00 | c | 85.24 | b | 84.24 | b | 67.04 | c | 52.72 | b | 35.59 | h | 8.40 | f | 57.03 | b | |
1984 | 16.61 | 33.04 | c | 33.48 | d | 57.60 | e | 64.70 | a | 77.35 | d | 81.23 | e | 84.33 | d | 66.19 | i | 55.90 | a | 35.15 | j | 18.87 | a | 52.31 | b | |
1985 | ----- | z | 20.67 | d | 40.68 | c | 57.41 | c | 70.77 | e | 70.04 | b | 79.36 | f | 72.93 | c | 62.39 | b | 53.73 | a | 26.00 | f | 12.35 | e | 51.22 | c |
1986 | 21.86 | b | 20.73 | b | 39.73 | a | 55.43 | 72.33 | g | 77.67 | i | 79.81 | d | 76.00 | q | 66.72 | l | ----- | z | ----- | z | ----- | z | 43.51 | g | |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.74 | 64.93 | 48.77 | 28.67 | c | 23.26 | d | 49.48 | g | |||
1992 | 23.32 | c | 26.86 | 36.97 | b | 45.13 | 68.23 | a | 71.13 | 71.47 | a | 73.29 | 65.40 | 54.58 | 31.31 | a | 18.76 | b | 48.87 | |||||||
1993 | 16.97 | b | 20.79 | 37.03 | a | 52.13 | 64.60 | a | 70.43 | 73.84 | 76.55 | 60.25 | b | 49.13 | 31.45 | a | 22.20 | a | 47.95 | |||||||
1994 | 4.90 | 15.68 | 37.66 | b | 51.17 | 66.77 | 75.60 | 75.77 | a | 74.83 | a | 69.50 | 56.71 | 39.33 | 29.29 | 49.77 | ||||||||||
1995 | 18.32 | 20.25 | 37.97 | b | 43.27 | 63.48 | 80.90 | 77.60 | a | 79.55 | b | 67.79 | a | 50.00 | a | 24.89 | b | 16.47 | a | 48.37 | ||||||
1996 | 8.06 | 19.17 | 26.43 | a | 43.40 | 62.62 | b | 75.33 | 75.57 | a | 79.19 | 67.82 | b | 51.70 | a | 25.61 | b | 14.10 | 45.75 | |||||||
1997 | 10.97 | a | 23.61 | 31.90 | 49.07 | 58.58 | 78.10 | 77.65 | h | 74.62 | b | 70.13 | 53.35 | 31.23 | 28.81 | 46.40 | a | |||||||||
1998 | 19.68 | 35.25 | 37.00 | 58.66 | a | 72.06 | 69.23 | 78.39 | 80.16 | 73.32 | b | 54.76 | f | 35.20 | 22.30 | a | 52.84 | a | ||||||||
1999 | 13.19 | 31.14 | 38.24 | b | 54.27 | 66.61 | 73.30 | 80.19 | 75.58 | 64.10 | 51.29 | 50.58 | k | 28.62 | b | 52.41 | a | |||||||||
2000 | 18.29 | 30.69 | 43.33 | a | 51.13 | 66.73 | a | 68.82 | b | 80.23 | 77.66 | b | 65.90 | a | 57.68 | 40.59 | m | 9.29 | 51.80 | a | ||||||
2001 | 24.13 | a | 16.04 | 36.55 | 48.77 | 67.45 | 75.77 | 80.65 | 80.16 | 68.47 | 52.23 | 45.43 | 27.13 | 51.90 | ||||||||||||
2002 | 23.70 | h | 33.50 | f | 27.84 | 47.50 | 58.23 | 75.93 | a | 83.00 | 76.55 | 71.82 | b | 39.14 | i | 32.62 | d | 28.26 | l | 59.19 | d | |||||
2003 | 14.52 | 16.96 | 33.16 | 53.87 | 67.26 | 74.37 | 80.03 | 80.97 | 67.17 | 55.20 | f | 31.17 | 27.97 | b | 49.77 | a | ||||||||||
2004 | 8.80 | a | 31.33 | n | 37.13 | 51.80 | 58.74 | 70.00 | k | 76.55 | 70.35 | 71.33 | 53.74 | 41.37 | 21.83 | a | 49.16 | b | ||||||||
2005 | 11.67 | a | 25.35 | k | 34.23 | 56.60 | j | 61.06 | 71.21 | k | 80.26 | 77.19 | 71.90 | 59.32 | l | 36.53 | 23.39 | 49.53 | d | |||||||
2006 | 29.10 | 19.78 | a | 37.39 | 59.75 | b | 65.87 | a | 76.40 | 86.47 | a | 79.45 | 69.00 | a | 51.34 | b | 37.53 | k | 28.67 | a | 54.84 | a | ||||
2007 | 19.90 | b | 14.82 | 37.87 | 51.86 | b | 67.81 | 77.37 | 81.16 | 78.29 | 67.10 | 56.03 | 39.63 | k | 18.97 | 51.92 | a | |||||||||
2008 | 17.45 | 19.59 | 33.20 | a | 47.65 | d | 60.68 | 71.70 | 77.13 | 77.93 | b | ----- | z | 54.20 | a | 38.17 | g | 10.38 | e | 46.99 | b | |||||
2009 | 9.00 | 23.21 | 33.00 | 49.17 | 61.39 | 71.00 | 73.10 | 74.29 | 75.67 | 45.81 | 46.13 | g | 17.18 | c | 48.44 | a | ||||||||||
2010 | 18.68 | 24.77 | b | 45.81 | 62.00 | c | 65.45 | 71.57 | 80.52 | d | 80.42 | 63.07 | c | 59.97 | a | 44.57 | i | 18.61 | c | 53.71 | a | |||||
2011 | 11.94 | 22.15 | b | 33.64 | c | 50.17 | 64.16 | 70.63 | 82.19 | 81.04 | c | 71.04 | b | 60.50 | a | 45.35 | m | 28.17 | b | 52.33 | a | |||||
2012 | 24.26 | 29.11 | b | 49.48 | 55.74 | g | 67.42 | 78.58 | d | 86.76 | b | 80.68 | 70.52 | a | 50.79 | b | 36.25 | n | 21.35 | 55.90 | b | |||||
2013 | 18.07 | a | 23.16 | c | 32.74 | ----- | z | 63.32 | 75.17 | 78.74 | 80.03 | a | 71.93 | 51.84 | 38.95 | i | 7.19 | d | 50.22 | b | ||||||
2014 | 9.55 | 12.54 | b | 27.06 | 46.90 | a | 62.97 | 72.40 | 76.69 | b | 76.42 | e | 68.33 | 55.62 | b | 28.40 | 25.43 | c | 46.86 | |||||||
2015 | 19.94 | 11.32 | 36.47 | n | 54.33 | c | 64.61 | 74.37 | 80.40 | a | 76.00 | 73.77 | 57.55 | 42.63 | 29.16 | 53.10 | a | |||||||||
2016 | 18.58 | 25.90 | 42.71 | 48.50 | 69.52 | b | 73.90 | 79.15 | d | 78.69 | b | 69.38 | f | 55.32 | 47.03 | 21.10 | a | 50.95 | a | |||||||
2017 | 19.71 | 28.71 | 36.90 | 53.50 | 63.26 | 74.77 | 80.47 | a | 76.00 | a | 68.70 | 55.87 | a | 31.10 | 16.13 | 50.43 | ||||||||||
2018 | 15.48 | 16.57 | 39.06 | 44.20 | 72.33 | a | 75.79 | b | 79.97 | 79.22 | d | 67.34 | a | 46.15 | e | 26.93 | 25.77 | 49.07 | ||||||||
2019 | 11.43 | c | 14.41 | a | 32.59 | b | 48.86 | a | 57.82 | i | 74.96 | d | 80.92 | e | 76.03 | a | 65.93 | 48.84 | 29.90 | 21.59 | b | 45.95 | a | |||
2020 | 18.68 | c | 22.21 | a | 38.48 | 49.20 | 64.73 | a | 76.63 | 82.74 | 79.40 | a | 67.00 | a | 44.68 | 39.60 | 27.13 | a | 50.87 | |||||||
2021 | 30.39 | m | ----- | z | 45.77 | 49.87 | 67.33 | d | 84.08 | e | 85.24 | b | 81.74 | 71.38 | d | 56.17 | m | 38.31 | d | 24.88 | f | 65.47 | d | |||
2022 | 11.55 | 13.36 | 32.68 | 41.57 | 64.39 | 74.37 | 79.43 | a | 77.68 | 76.73 | s | 52.38 | g | 35.63 | 18.23 | a | 44.89 | b | ||||||||
2023 | 22.13 | 24.04 | 33.22 | h | 46.30 | 72.00 | a | 79.27 | 77.58 | 77.65 | 71.97 | 55.58 | 37.73 | 34.61 | 54.44 | a | ||||||||||
2024 | 19.45 | 33.55 | 36.00 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.67 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 15.65 | 21.92 | 35.66 | 51.00 | 66.00 | 74.79 | 79.69 | 78.01 | 68.61 | 54.23 | 34.39 | 21.32 | 49.10 | |||||||||||||
S.D. | 6.11 | 5.94 | 5.00 | 4.83 | 4.71 | 3.36 | 3.44 | 3.03 | 3.33 | 4.50 | 5.50 | 6.25 | 1.81 | |||||||||||||
SKEW | -0.18 | 0.24 | 0.43 | 0.27 | 0.67 | 0.36 | -0.12 | -0.20 | -0.30 | 0.29 | 0.42 | -0.25 | -0.34 | |||||||||||||
MAX | 29.10 | 35.25 | 49.48 | 62.00 | 79.55 | 84.08 | 86.76 | 84.33 | 75.67 | 68.26 | 47.03 | 34.61 | 51.90 | |||||||||||||
MIN | 2.03 | 11.18 | 25.90 | 41.57 | 58.23 | 68.82 | 71.47 | 70.35 | 60.25 | 44.68 | 24.89 | 7.19 | 45.75 | |||||||||||||
YRS | 44 | 45 | 47 | 43 | 43 | 36 | 38 | 40 | 38 | 39 | 32 | 42 | 11 |