YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.73 | t | 83.45 | 67.23 | 51.97 | a | 40.07 | 26.88 | e | 53.92 | g | |||
1931 | 25.32 | 34.82 | 36.32 | 56.43 | 64.55 | b | 80.17 | 81.40 | a | 76.89 | c | 73.13 | 61.90 | 43.33 | 31.13 | 55.45 | ||||||||||
1932 | 23.77 | a | 23.72 | 25.86 | b | 52.82 | b | 68.06 | 80.70 | 77.89 | d | 79.39 | 66.90 | 49.32 | f | 31.00 | 19.55 | 49.97 | a | |||||||
1933 | 23.73 | a | 16.71 | 34.87 | a | 48.57 | 66.90 | a | 82.50 | 81.61 | 78.16 | 71.20 | 48.45 | 29.40 | 15.67 | a | 49.81 | |||||||||
1934 | 23.61 | 21.74 | a | 32.00 | 47.73 | 72.45 | 73.13 | 79.39 | 74.94 | 64.36 | b | 57.94 | 41.33 | 17.77 | 50.53 | |||||||||||
1935 | 11.58 | 30.14 | 34.65 | 48.24 | a | 63.00 | 69.55 | a | 84.10 | 82.47 | p | 64.04 | f | 53.29 | 28.28 | a | 21.13 | 44.40 | b | |||||||
1936 | 6.20 | a | 6.66 | 33.84 | 42.50 | 70.32 | 75.73 | 89.03 | 80.16 | 68.90 | 48.57 | a | 31.00 | 23.16 | 48.01 | |||||||||||
1937 | 7.30 | a | 21.11 | 33.87 | a | 45.50 | 66.32 | c | 70.77 | q | ----- | z | ----- | z | ----- | z | 53.78 | v | 34.63 | 20.81 | 32.79 | e | ||||
1938 | 15.29 | 27.15 | a | 46.32 | 53.00 | 64.52 | 76.83 | 81.10 | 81.61 | 70.20 | 61.10 | 31.57 | 20.23 | 52.41 | ||||||||||||
1939 | 20.00 | 12.32 | 33.55 | 50.23 | 70.87 | 74.77 | 83.39 | 80.55 | 67.40 | 49.58 | 44.23 | 33.55 | b | 51.70 | ||||||||||||
1940 | 14.94 | 26.10 | 29.91 | i | 49.40 | 64.84 | 74.13 | 82.10 | 75.86 | b | 66.45 | a | 54.42 | 28.48 | a | 27.22 | d | 51.27 | a | |||||||
1941 | 19.65 | 20.54 | 34.68 | 59.93 | 70.26 | 76.10 | 83.32 | 76.45 | 66.77 | 55.04 | c | 35.63 | 24.68 | 51.92 | ||||||||||||
1942 | 26.00 | b | 25.78 | a | 43.03 | 68.48 | c | 67.71 | 71.47 | 75.90 | 73.16 | 61.27 | 55.65 | 32.00 | 13.81 | 51.19 | ||||||||||
1943 | 9.13 | a | 32.29 | k | ----- | z | 54.13 | 65.32 | 78.17 | 87.52 | 81.21 | b | 68.87 | 61.94 | 33.27 | 28.20 | a | 56.77 | b | |||||||
1944 | 30.71 | 26.31 | 32.32 | 55.20 | 70.13 | 77.37 | 79.71 | 77.65 | 67.80 | 61.90 | 37.67 | 23.13 | 53.32 | |||||||||||||
1945 | 16.90 | 26.11 | 46.94 | 49.27 | 60.16 | 71.50 | 78.03 | 79.03 | 64.10 | 56.68 | 30.87 | 16.71 | 49.69 | |||||||||||||
1946 | 17.65 | 19.36 | 49.19 | 56.43 | 65.71 | 76.20 | 82.13 | 76.32 | 67.30 | 54.19 | 36.40 | 18.94 | 51.65 | |||||||||||||
1947 | 23.35 | 19.36 | 34.68 | 48.47 | 61.10 | 71.77 | 83.06 | 82.77 | 67.13 | 64.87 | 29.80 | 20.58 | 50.58 | |||||||||||||
1948 | 14.68 | 20.03 | 35.31 | b | 54.37 | 68.58 | 75.07 | 81.82 | c | 79.65 | 75.80 | 60.13 | 36.93 | 22.55 | 52.08 | |||||||||||
1949 | 17.70 | a | 19.52 | a | 33.35 | 58.73 | 68.33 | a | 78.33 | 77.71 | 82.16 | 67.13 | 55.13 | 39.80 | 20.68 | 51.55 | ||||||||||
1950 | 9.07 | c | 25.25 | 31.52 | 41.13 | 62.55 | 75.45 | a | 77.38 | b | 74.73 | a | 69.78 | c | 57.00 | 31.24 | a | 15.90 | 47.58 | |||||||
1951 | 15.72 | f | 23.25 | 32.47 | a | 48.83 | 71.97 | 73.07 | 80.28 | b | 73.53 | a | 63.69 | a | 52.65 | 30.30 | 17.07 | d | 51.55 | a | ||||||
1952 | 17.03 | b | 31.64 | a | 34.81 | e | 63.90 | a | 70.23 | 78.52 | a | 79.52 | d | 78.70 | a | 70.93 | 52.94 | 39.11 | b | 28.13 | a | 53.79 | ||||
1953 | 20.38 | b | 26.26 | a | 38.87 | a | 49.30 | 66.24 | b | 77.17 | a | 80.52 | 81.26 | 66.07 | 66.76 | b | 43.93 | a | 24.60 | a | 53.45 | |||||
1954 | 11.74 | 36.41 | a | 35.33 | d | 49.20 | 58.81 | 76.48 | a | 81.94 | 76.03 | 64.77 | 54.52 | 40.57 | 27.42 | 51.10 | ||||||||||
1955 | 17.79 | b | 21.43 | 30.90 | 62.17 | 71.71 | 76.87 | 86.29 | 83.74 | 67.24 | a | 57.45 | 28.73 | 15.53 | a | 51.65 | ||||||||||
1956 | 22.19 | 23.39 | a | 32.93 | a | 47.47 | 63.71 | 81.17 | 76.77 | 76.32 | 64.20 | 65.17 | a | 38.60 | 23.48 | d | 51.28 | |||||||||
1957 | 10.26 | 22.96 | 37.58 | 50.62 | a | 68.60 | a | 72.10 | a | 84.17 | a | 77.37 | a | 65.43 | 55.42 | 34.96 | b | 26.23 | 50.48 | |||||||
1958 | 25.19 | 23.71 | 40.73 | a | 58.52 | a | 69.93 | b | 70.29 | b | 77.06 | 76.94 | 67.50 | b | 59.24 | b | 37.33 | 13.70 | a | 51.68 | ||||||
1959 | 11.57 | c | 22.30 | a | 38.27 | a | 52.79 | b | 69.15 | e | 78.00 | a | 80.71 | 78.74 | 65.64 | b | 46.65 | 26.76 | a | 30.97 | 50.13 | |||||
1960 | 19.55 | 24.38 | 29.14 | b | 52.44 | c | 67.81 | 73.90 | 80.87 | 79.59 | b | 67.57 | 56.23 | a | 36.97 | a | 19.67 | a | 50.68 | |||||||
1961 | 16.81 | 31.74 | a | 42.35 | 46.97 | 66.57 | a | 81.75 | b | 81.03 | a | 80.97 | a | 64.82 | b | 57.20 | a | 36.04 | d | 19.66 | b | 52.16 | ||||
1962 | 12.45 | 17.27 | b | 36.45 | b | 50.63 | c | 65.54 | c | 76.26 | g | 75.30 | d | 77.79 | b | 66.12 | e | 59.52 | d | 41.88 | e | 26.86 | c | 48.16 | a | |
1963 | 9.59 | i | 19.31 | b | 41.68 | c | 55.76 | a | 64.37 | d | 76.62 | f | 80.66 | b | 78.19 | 73.38 | d | 69.68 | 43.13 | 15.75 | c | 54.19 | b | |||
1964 | 24.69 | b | 30.26 | b | 33.97 | b | 57.79 | b | 71.90 | 74.59 | c | 83.31 | e | 74.00 | c | 66.37 | 56.82 | c | 36.87 | 15.25 | c | 52.15 | ||||
1965 | 14.76 | b | 19.17 | d | 28.93 | a | 50.96 | b | 68.07 | c | 75.00 | c | 76.63 | a | 77.39 | 57.83 | a | 55.29 | g | 34.30 | c | 29.00 | f | 50.30 | b | |
1966 | 5.64 | c | 22.58 | b | 42.26 | d | 45.57 | b | 63.30 | a | 76.22 | c | 83.93 | d | 76.87 | 69.32 | b | 56.36 | c | 32.20 | 21.32 | 49.63 | ||||
1967 | 17.93 | a | 18.60 | m | 41.76 | j | 50.39 | b | 60.80 | a | 73.96 | c | 79.72 | f | 77.61 | 73.63 | 53.14 | c | 35.75 | f | 24.04 | d | 53.94 | d | ||
1968 | 18.03 | a | 21.36 | a | 47.59 | d | 53.67 | 62.68 | 74.48 | e | 77.74 | 75.85 | d | 68.48 | e | 55.86 | c | 37.47 | o | 17.72 | f | 55.57 | b | |||
1969 | 12.79 | b | 26.56 | a | 36.00 | b | 58.33 | 67.39 | 68.25 | f | 78.79 | c | 82.70 | d | 67.23 | d | 45.97 | b | 36.35 | j | 24.77 | a | 50.05 | b | ||
1970 | 12.19 | 23.25 | 34.13 | 48.20 | 62.00 | c | 78.17 | g | 83.60 | a | 80.07 | c | 70.11 | b | 55.07 | b | 34.19 | c | 18.94 | 47.43 | a | |||||
1971 | 7.33 | d | 25.57 | 34.39 | 54.38 | a | 66.55 | 78.31 | d | 75.82 | c | 80.23 | 70.97 | 56.93 | d | 34.15 | c | 21.97 | a | 50.55 | ||||||
1972 | 9.71 | c | 19.64 | d | 34.74 | 50.40 | 73.97 | 78.39 | b | 77.45 | 80.57 | a | 66.83 | f | 56.05 | k | 32.86 | i | 14.32 | f | 53.11 | d | ||||
1973 | 23.29 | c | 26.58 | b | 47.12 | e | 52.62 | a | 67.28 | b | 76.70 | 79.65 | 81.24 | b | 65.52 | c | 60.76 | f | 33.66 | a | 19.70 | d | 52.12 | a | ||
1974 | 14.70 | a | 26.48 | a | 34.52 | 54.79 | b | 60.07 | a | 77.47 | 84.60 | a | 74.52 | 64.58 | d | 57.96 | d | 37.06 | n | 28.39 | 52.55 | a | ||||
1975 | 21.06 | 25.93 | a | 32.61 | 47.33 | 72.06 | 75.41 | a | 86.45 | b | ----- | z | 65.80 | 58.53 | a | 40.34 | a | 19.97 | 49.59 | a | ||||||
1976 | 17.07 | a | 33.62 | c | 35.60 | a | 60.57 | 70.84 | 80.30 | 82.57 | c | 83.14 | c | 71.53 | k | 50.57 | a | 32.50 | h | 13.60 | a | 52.79 | b | |||
1977 | 9.13 | a | 27.36 | 45.18 | c | 60.97 | 78.61 | 77.17 | 83.07 | b | 72.68 | 64.42 | f | 57.35 | h | 30.48 | e | 16.61 | c | 50.12 | b | |||||
1978 | 12.07 | c | 18.29 | k | 37.96 | c | 53.89 | b | 74.07 | c | 77.00 | c | 79.79 | b | 78.52 | 70.00 | b | 57.72 | b | 33.69 | d | 17.53 | a | 53.84 | a | |
1979 | 7.68 | 17.76 | c | 35.03 | b | 49.70 | 59.87 | 75.17 | 80.21 | b | 74.94 | 71.13 | 50.81 | 33.48 | c | 29.13 | a | 48.74 | ||||||||
1980 | 16.57 | a | 22.21 | 35.29 | 60.27 | 76.13 | 76.67 | 83.30 | a | 77.39 | 65.60 | 51.29 | c | 37.67 | c | 19.24 | b | 51.80 | ||||||||
1981 | 21.48 | b | 28.61 | 44.43 | a | 56.33 | c | 69.35 | 72.93 | 81.52 | b | 78.16 | 67.07 | 51.71 | 44.39 | b | 20.50 | a | 53.04 | |||||||
1982 | 7.72 | f | 20.75 | d | 33.18 | c | 52.04 | b | 71.70 | a | 70.20 | e | 82.78 | h | 74.88 | g | 66.81 | c | 55.32 | l | 34.05 | i | 24.56 | f | 52.45 | f |
1983 | 22.25 | c | 28.56 | c | 38.15 | d | 53.55 | a | 65.90 | 75.64 | b | 84.00 | b | 83.97 | 67.89 | b | 53.57 | c | 33.83 | g | 9.50 | c | 53.00 | a | ||
1984 | 16.74 | d | 34.04 | a | 33.66 | b | 59.90 | 66.50 | a | 77.17 | a | 79.74 | d | 83.34 | b | 64.07 | c | 59.88 | g | 37.00 | g | 20.81 | d | 53.60 | b | |
1985 | 14.82 | c | 21.22 | a | 41.87 | a | 58.75 | b | 71.59 | b | 69.56 | c | 79.70 | k | 72.50 | a | 63.76 | a | 55.39 | c | 24.86 | h | 10.93 | d | 48.04 | b |
1986 | 21.13 | a | 22.88 | b | 43.04 | c | 58.37 | 72.29 | 76.77 | 80.10 | a | 75.68 | 64.23 | 54.41 | d | 33.46 | f | 28.41 | b | 54.30 | a | |||||
1987 | 23.93 | a | 35.52 | c | 43.32 | 68.07 | 70.65 | 81.34 | a | 82.77 | a | 76.76 | b | 70.59 | c | 51.93 | c | 40.92 | d | 26.80 | a | 56.05 | ||||
1988 | 14.30 | a | 19.96 | b | 35.68 | 58.10 | a | 75.61 | 84.37 | 85.27 | a | 79.52 | b | 67.89 | b | 52.04 | c | 33.92 | f | 22.83 | b | 54.14 | a | |||
1989 | 23.35 | 15.21 | d | 33.10 | a | 51.22 | c | 70.87 | 75.36 | b | 84.20 | a | 79.93 | b | 69.46 | b | 56.96 | d | 30.93 | a | 11.93 | b | 50.21 | |||
1990 | 28.10 | a | 29.64 | c | 43.11 | c | 53.00 | 66.67 | a | 77.32 | b | 80.61 | c | 83.10 | a | 71.34 | a | 55.25 | c | 41.48 | e | 21.28 | f | 57.24 | a | |
1991 | 14.50 | g | 34.00 | g | 44.23 | e | 59.79 | a | 72.60 | a | 80.15 | c | 79.23 | a | 83.71 | 65.59 | c | 51.04 | e | 28.33 | o | 24.21 | g | 67.04 | d | |
1992 | 27.68 | i | 29.14 | h | 39.17 | g | 49.55 | h | 73.03 | b | 73.20 | e | 73.29 | c | 73.88 | g | 67.38 | d | 54.04 | g | 31.12 | v | 21.00 | i | 71.73 | h |
1993 | 16.68 | l | 25.86 | g | 41.88 | f | 53.81 | c | 67.19 | e | 73.07 | b | 74.57 | c | 78.77 | i | 59.80 | e | 52.82 | i | 30.00 | t | 19.76 | j | 65.69 | g |
1994 | 3.68 | i | 20.77 | f | 41.61 | h | 54.48 | e | 69.54 | e | 77.82 | b | 76.93 | c | 78.61 | m | 71.75 | f | 60.41 | i | 40.25 | r | 30.26 | h | 69.69 | h |
1995 | 19.68 | l | 21.25 | l | 40.10 | j | 45.84 | e | 66.79 | c | 82.41 | c | 80.50 | i | 80.30 | k | 66.88 | e | 52.83 | g | 26.17 | r | 17.38 | g | 65.48 | h |
1996 | 7.95 | j | 22.59 | g | 31.00 | k | 47.00 | d | 65.44 | d | 79.36 | e | 77.58 | e | 80.24 | f | 66.00 | h | 53.58 | e | 28.94 | m | 17.05 | j | 64.59 | g |
1997 | 15.17 | h | 28.04 | e | 36.80 | f | 55.46 | f | 61.44 | d | 79.07 | b | 80.12 | e | 75.11 | d | 71.41 | h | 54.53 | l | 33.20 | t | 29.32 | i | 64.76 | g |
1998 | 20.67 | j | 37.41 | f | 38.88 | f | 61.21 | a | 73.19 | e | 71.12 | f | 78.64 | f | 79.12 | n | 74.17 | f | 55.12 | e | 33.81 | n | 25.75 | k | 63.17 | i |
1999 | 14.92 | g | 32.59 | f | 41.92 | g | 60.12 | d | 68.43 | j | 73.80 | e | 79.84 | f | 74.48 | f | 63.43 | g | 53.60 | f | 44.70 | j | 29.00 | i | 66.96 | j |
2000 | 17.75 | g | 34.91 | g | 46.17 | g | 54.41 | c | 70.39 | h | 71.50 | f | 78.74 | l | 76.84 | f | 66.14 | h | 59.87 | h | 33.00 | k | 9.30 | h | 54.41 | k |
2001 | 27.00 | g | 18.74 | e | 39.92 | g | 54.52 | e | 67.84 | f | 76.95 | h | 81.38 | g | 80.11 | d | 69.57 | g | 45.25 | s | 42.13 | o | 28.35 | h | 51.12 | i |
2002 | 22.13 | h | 33.04 | e | 29.60 | f | 50.59 | c | 61.66 | b | 77.00 | a | 81.76 | f | 77.00 | b | 70.85 | d | 42.77 | a | 32.60 | t | 26.16 | f | 58.99 | e |
2003 | 17.00 | l | 18.50 | h | 35.88 | f | 56.28 | a | 68.40 | a | 74.61 | b | 78.88 | e | 82.04 | c | 68.65 | d | 57.08 | e | 27.14 | p | 25.33 | g | 69.42 | e |
2004 | 9.24 | f | 28.91 | f | 39.04 | f | 56.54 | d | 59.52 | b | 71.50 | d | 77.34 | b | 70.73 | e | 71.88 | f | 55.69 | e | 42.60 | o | 23.12 | f | 65.22 | f |
2005 | 15.39 | h | 30.26 | i | 37.28 | f | 59.62 | a | 62.04 | f | 76.08 | e | 80.05 | l | 77.29 | c | 71.67 | f | 54.83 | h | 38.00 | h | 23.10 | j | 71.00 | i |
2006 | 29.00 | i | 21.73 | f | 37.63 | d | 64.88 | d | 69.69 | e | 75.42 | f | 86.08 | f | 78.70 | a | 70.08 | f | 50.87 | h | 37.12 | m | 28.30 | k | 62.73 | h |
2007 | 21.36 | i | 16.32 | f | 41.11 | d | 52.16 | e | 70.48 | 76.89 | b | 81.42 | e | 76.93 | c | 68.29 | b | 55.67 | a | 33.56 | e | 18.45 | 57.50 | b | ||
2008 | 18.57 | a | 19.86 | a | 32.19 | 47.83 | 60.17 | a | 71.39 | b | 76.20 | a | 76.58 | 66.41 | c | 54.53 | a | 33.24 | a | 12.06 | 47.42 | |||||
2009 | 11.33 | a | 23.28 | c | 35.59 | b | 50.52 | a | 62.07 | b | 70.66 | a | 72.06 | 72.35 | 73.55 | a | 43.39 | 42.53 | 15.00 | b | 47.69 | |||||
2010 | 17.81 | 25.79 | 46.68 | 60.67 | 67.58 | 70.90 | 79.68 | 79.74 | 61.73 | 60.03 | 38.97 | 16.84 | 52.20 | |||||||||||||
2011 | 11.61 | 25.79 | 35.45 | 52.37 | 65.52 | 71.73 | 82.39 | 80.06 | 69.67 | 59.13 | 40.53 | 29.29 | 51.96 | |||||||||||||
2012 | 26.21 | c | 28.38 | 50.74 | 54.72 | a | 68.43 | a | 77.93 | 85.00 | 79.39 | 67.87 | 49.55 | 34.80 | 20.39 | 53.62 | ||||||||||
2013 | 16.23 | 22.75 | 32.26 | 45.12 | m | 61.10 | 72.00 | 75.61 | 77.22 | d | 69.17 | 49.97 | ----- | z | 7.50 | k | 52.92 | c | ||||||||
2014 | ----- | z | 10.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 10.39 | k | |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.87 | 54.45 | 40.67 | 28.48 | j | 55.33 | i | |||
2016 | 15.46 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.24 | b | 45.87 | 18.71 | 33.32 | h | ||
2017 | 19.58 | 29.43 | e | 34.26 | 51.93 | 60.74 | 71.87 | 77.55 | 74.10 | 66.27 | 54.13 | a | 29.53 | 13.94 | 48.61 | |||||||||||
2018 | 16.81 | 11.79 | i | 36.65 | 43.77 | 70.61 | 73.63 | 78.26 | 76.32 | 63.80 | 42.87 | 24.90 | 23.55 | 50.11 | a | |||||||||||
2019 | 10.42 | 14.57 | 32.29 | 48.47 | 58.35 | 73.20 | 78.71 | 74.39 | 63.00 | 46.13 | 27.23 | 20.81 | 45.63 | |||||||||||||
2020 | 18.77 | 23.59 | 38.42 | 47.50 | 63.00 | 75.00 | 79.97 | 76.10 | 65.30 | g | 44.52 | 40.97 | 26.03 | 48.53 | a | |||||||||||
2021 | 24.48 | 15.14 | 46.58 | 51.63 | 67.39 | 80.77 | 82.94 | 80.29 | 72.83 | 58.29 | 36.90 | 24.06 | 53.44 | |||||||||||||
2022 | 11.39 | 14.29 | 33.48 | 40.00 | g | 68.57 | x | 73.53 | 76.71 | 75.94 | 67.13 | 53.42 | 32.93 | 16.26 | 45.51 | b | ||||||||||
2023 | 21.00 | 23.64 | 31.77 | 44.67 | 70.65 | 77.50 | 74.65 | 74.13 | 68.48 | c | 51.55 | 36.00 | 32.77 | 50.57 | ||||||||||||
2024 | 18.84 | 31.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.97 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.09 | 23.77 | 37.23 | 53.41 | 67.27 | 75.81 | 80.33 | 78.13 | 67.46 | 54.77 | 35.67 | 21.17 | 51.12 | |||||||||||||
S.D. | 5.77 | 5.87 | 5.39 | 5.59 | 4.44 | 3.31 | 3.36 | 3.10 | 3.23 | 5.21 | 5.05 | 5.52 | 2.12 | |||||||||||||
SKEW | 0.02 | -0.19 | 0.66 | 0.36 | -0.04 | 0.19 | 0.03 | -0.01 | -0.10 | 0.03 | 0.05 | 0.16 | -0.22 | |||||||||||||
MAX | 30.71 | 36.41 | 50.74 | 68.48 | 78.61 | 84.37 | 89.03 | 83.97 | 75.80 | 69.68 | 45.87 | 33.55 | 56.05 | |||||||||||||
MIN | 5.64 | 6.66 | 25.86 | 41.13 | 58.35 | 69.55 | 72.06 | 70.73 | 57.83 | 42.77 | 24.90 | 9.50 | 45.63 | |||||||||||||
YRS | 72 | 74 | 73 | 86 | 85 | 81 | 78 | 79 | 76 | 75 | 64 | 70 | 42 |