YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.44 | l | 36.90 | 21.13 | 18.00 | 25.35 | i | |||
1930 | 12.35 | 21.07 | 23.77 | 36.23 | 35.55 | 47.10 | 56.03 | 53.13 | 45.10 | 30.65 | 20.73 | 11.39 | 32.76 | |||||||||||||
1931 | 8.74 | 26.82 | 22.52 | 33.20 | 38.94 | 46.23 | d | ----- | z | 52.25 | o | 51.37 | 38.03 | 22.80 | 5.73 | a | 29.44 | b | ||||||||
1932 | 6.30 | a | 26.11 | a | 24.42 | 31.30 | 38.58 | 45.80 | 56.71 | 57.19 | 43.37 | 33.71 | 21.33 | 7.26 | 32.67 | |||||||||||
1933 | 4.90 | a | 6.25 | 26.29 | 25.33 | 34.13 | 50.43 | 57.81 | 56.42 | 51.67 | 39.32 | 24.23 | 20.61 | 33.12 | ||||||||||||
1934 | 17.23 | 25.21 | 28.16 | 35.63 | 44.29 | 45.43 | 57.84 | 56.06 | 44.40 | 36.31 | b | 25.15 | c | ----- | z | 37.79 | a | |||||||||
1935 | 20.52 | 23.86 | 24.74 | 31.37 | 37.26 | 45.73 | 54.58 | 55.06 | 44.53 | 33.87 | 22.77 | 17.65 | 34.33 | |||||||||||||
1936 | 14.48 | 22.21 | 22.81 | 31.63 | 39.16 | 49.23 | 56.35 | 55.97 | 46.30 | 34.77 | 22.90 | 18.74 | 34.55 | |||||||||||||
1937 | -1.10 | 18.64 | 24.90 | 28.47 | 44.84 | 46.63 | 53.48 | 54.29 | c | 45.97 | 34.06 | 20.10 | 16.77 | 32.26 | ||||||||||||
1938 | 15.90 | 16.82 | 22.35 | 27.17 | a | 32.42 | 46.47 | 50.52 | 53.57 | a | 46.19 | c | ----- | z | ----- | z | ----- | z | 34.60 | c | ||||||
1939 | ----- | z | ----- | z | ----- | z | 32.07 | b | 37.42 | 44.83 | 53.87 | 52.19 | 48.30 | 29.23 | a | 24.47 | 14.23 | a | 37.40 | c | ||||||
1940 | 15.23 | a | 20.24 | 21.87 | 30.10 | a | 37.81 | 46.20 | 52.50 | a | 50.65 | 46.83 | a | 33.37 | a | 20.55 | a | 20.65 | 33.00 | |||||||
1941 | 21.13 | a | 27.18 | 26.84 | 29.93 | 39.77 | 43.80 | 50.16 | 49.97 | 42.57 | 33.87 | 21.87 | 18.23 | 33.78 | ||||||||||||
1942 | 11.68 | 12.25 | 17.81 | 30.03 | a | 32.26 | 39.38 | a | 50.81 | 49.81 | 39.93 | 34.29 | 24.93 | 19.57 | a | 30.23 | ||||||||||
1943 | 18.32 | 21.18 | 26.00 | 32.03 | 35.48 | 44.87 | 52.48 | 54.25 | c | 43.73 | 34.32 | 21.07 | 19.83 | a | 33.63 | |||||||||||
1944 | 8.97 | a | 15.97 | 20.10 | a | 27.29 | i | 36.90 | a | 41.33 | 51.17 | a | 51.32 | 44.21 | a | 38.06 | 22.19 | d | 13.55 | 31.25 | a | |||||
1945 | 12.52 | 23.89 | 22.71 | 26.40 | 34.94 | 38.20 | 53.52 | 54.81 | 41.80 | 35.32 | 17.27 | 4.03 | 30.45 | |||||||||||||
1946 | 6.55 | 13.89 | 22.47 | a | 33.53 | 33.65 | 42.83 | 51.81 | 51.84 | 44.07 | 28.87 | 20.20 | 16.16 | 30.49 | ||||||||||||
1947 | 6.03 | 17.07 | 20.26 | 24.90 | 37.10 | 39.57 | 49.77 | 50.23 | 43.20 | 31.35 | 13.60 | 8.42 | 28.46 | |||||||||||||
1948 | 13.87 | 15.76 | 18.55 | 31.30 | 38.71 | 44.97 | 51.63 | a | 51.90 | 44.77 | 34.94 | 17.07 | 17.87 | 31.78 | ||||||||||||
1949 | 8.19 | 11.32 | 23.61 | 30.90 | 38.19 | 46.33 | 53.68 | 49.42 | 46.60 | 30.65 | 23.77 | 8.48 | 30.93 | |||||||||||||
1950 | 15.06 | 22.00 | 20.84 | 28.17 | 33.00 | 42.63 | 54.68 | 48.77 | 42.50 | 37.29 | 22.83 | 17.92 | e | 32.14 | ||||||||||||
1951 | 13.42 | 19.36 | 20.48 | 30.63 | 38.68 | 41.30 | 55.26 | 52.97 | 41.83 | 33.00 | 22.33 | 14.65 | 31.99 | |||||||||||||
1952 | 17.71 | 18.10 | 19.87 | 32.00 | 37.90 | 45.70 | 52.61 | 54.10 | 44.97 | 33.32 | 17.52 | a | 12.90 | 32.23 | ||||||||||||
1953 | 19.32 | 15.43 | 22.37 | a | 27.97 | 34.19 | d | 45.77 | 56.00 | 51.29 | 43.13 | 33.03 | 22.13 | 11.55 | 31.85 | |||||||||||
1954 | 18.35 | 19.64 | 21.90 | 32.72 | a | 40.10 | 44.93 | 56.16 | 50.71 | 47.28 | a | 35.55 | 23.76 | a | 14.55 | 33.80 | ||||||||||
1955 | 10.55 | 9.79 | 22.61 | 26.07 | 31.52 | 43.13 | 52.20 | a | 54.94 | 45.19 | c | 34.45 | 21.73 | 22.07 | a | 31.19 | ||||||||||
1956 | 21.81 | 13.07 | 19.90 | a | 24.70 | 39.13 | 48.90 | 51.10 | 47.52 | 43.32 | b | 33.35 | 13.63 | 11.87 | 30.69 | |||||||||||
1957 | 21.57 | a | 27.21 | 25.16 | 29.10 | 36.74 | 46.28 | a | 53.39 | 53.52 | 41.47 | 35.97 | 20.97 | 17.77 | 34.09 | |||||||||||
1958 | 13.87 | 23.39 | 23.35 | 27.00 | a | 39.03 | 45.97 | a | 53.71 | 55.45 | 47.60 | 34.77 | 21.67 | 17.06 | 33.57 | |||||||||||
1959 | 15.52 | 20.11 | 19.23 | 31.00 | 35.16 | 49.07 | 55.06 | 53.73 | a | 43.83 | 33.39 | 21.00 | 18.39 | 32.96 | ||||||||||||
1960 | 10.19 | 17.38 | 24.83 | a | 27.00 | 36.06 | 47.33 | 55.13 | 52.87 | a | 46.87 | 33.84 | 25.03 | 14.00 | 32.54 | |||||||||||
1961 | 12.35 | 20.07 | 24.68 | c | 28.30 | g | 34.87 | a | 47.03 | 55.26 | 54.77 | 42.87 | 33.39 | 23.43 | 8.97 | 32.52 | a | |||||||||
1962 | 6.23 | 19.70 | a | 21.10 | 31.47 | 35.39 | 43.90 | 52.77 | 51.35 | 48.20 | 36.58 | 28.73 | 16.67 | a | 32.67 | |||||||||||
1963 | 8.29 | 21.75 | 22.94 | 27.93 | 38.84 | 44.47 | 56.81 | 55.06 | 49.03 | 39.16 | 24.77 | 10.29 | 33.28 | |||||||||||||
1964 | 10.45 | 9.28 | 17.77 | a | 25.10 | 37.52 | 43.03 | 56.71 | 52.94 | 45.90 | 34.68 | 19.73 | 19.26 | 31.03 | ||||||||||||
1965 | 18.10 | 15.25 | 21.55 | 28.90 | 34.90 | 43.00 | 54.81 | 50.94 | 43.07 | 32.61 | 28.33 | 19.94 | 32.62 | |||||||||||||
1966 | 12.26 | 12.75 | 22.68 | 29.23 | 40.29 | 46.37 | 56.45 | 54.26 | 46.37 | 32.32 | 26.43 | 16.10 | 32.96 | |||||||||||||
1967 | 8.07 | a | 19.00 | 25.94 | 27.67 | 35.29 | 45.80 | 57.06 | 52.90 | 46.97 | 33.10 | 24.17 | 8.40 | a | 32.03 | |||||||||||
1968 | 7.10 | a | 24.86 | 25.32 | 28.17 | 36.06 | 45.30 | 53.68 | 50.16 | 42.50 | 34.97 | 23.13 | 7.07 | a | 31.53 | |||||||||||
1969 | 18.93 | a | 21.07 | 19.68 | 30.40 | 38.42 | 45.36 | b | ----- | z | 55.58 | l | 48.10 | 33.68 | 24.40 | 20.39 | 30.04 | b | ||||||||
1970 | 14.35 | 21.14 | 21.61 | 24.27 | 36.03 | a | 45.41 | a | 57.03 | b | 57.80 | a | 43.90 | 31.29 | 24.57 | 18.77 | 33.02 | |||||||||
1971 | 13.19 | 15.44 | a | 22.42 | 29.33 | 36.83 | a | 47.07 | 56.58 | 56.03 | 45.57 | 34.94 | 23.93 | a | 14.00 | 32.94 | ||||||||||
1972 | 16.13 | 17.55 | 27.55 | 30.90 | 36.32 | 47.87 | 56.00 | 54.06 | 46.47 | 42.19 | 23.00 | 12.16 | 34.18 | |||||||||||||
1973 | 10.00 | 23.11 | 25.84 | 29.55 | a | 39.48 | 46.03 | 53.74 | 53.23 | 42.63 | 33.90 | 24.10 | 18.26 | 33.32 | ||||||||||||
1974 | 16.35 | 16.07 | 27.90 | 29.40 | 38.07 | c | 50.07 | 56.32 | 50.83 | b | 45.03 | 39.42 | 24.80 | 13.74 | 34.00 | |||||||||||
1975 | 12.32 | 19.21 | 24.32 | 28.33 | 34.83 | a | 43.90 | 56.00 | 52.48 | 47.48 | a | 33.86 | b | 19.87 | 16.17 | a | 32.40 | |||||||||
1976 | 12.61 | 24.55 | 21.30 | a | 30.30 | 41.39 | 46.62 | a | 55.40 | a | 53.39 | 48.10 | 32.48 | 22.23 | d | 11.71 | 33.34 | |||||||||
1977 | 11.03 | b | 17.86 | 21.45 | 32.07 | 37.00 | 49.90 | 55.61 | 55.48 | 49.37 | ----- | z | 24.75 | j | 19.87 | h | 36.64 | c | ||||||||
1978 | 21.05 | j | 23.56 | j | 30.39 | h | 32.30 | j | 37.00 | i | 46.91 | h | 54.05 | k | 52.70 | h | 45.05 | j | 38.67 | j | 28.82 | b | 14.73 | a | 21.78 | j |
1979 | 11.87 | 17.00 | 26.23 | 31.04 | b | 40.52 | 46.31 | a | 51.92 | g | 51.04 | h | 48.25 | j | 36.59 | i | 20.70 | j | 17.75 | k | 28.83 | f | ||||
1980 | 21.82 | i | 24.42 | j | 23.52 | j | 29.36 | h | 35.28 | m | 45.24 | m | 54.11 | l | 52.50 | q | 44.94 | l | 30.78 | m | 21.89 | l | 20.36 | i | ----- | z |
1981 | 18.00 | j | 18.11 | j | 25.27 | i | 33.62 | i | 37.06 | o | 48.21 | k | 56.62 | o | 53.60 | k | 49.33 | 37.19 | 26.73 | 18.32 | 32.90 | h | ||||
1982 | 16.97 | a | 22.17 | e | 28.48 | b | 31.64 | b | 38.45 | 43.97 | 55.32 | c | 57.50 | a | 50.52 | a | 31.18 | c | 27.20 | e | 24.60 | f | 36.67 | a | ||
1983 | 19.33 | a | 22.58 | b | 26.93 | b | 27.36 | b | 35.42 | 45.03 | 55.52 | d | 56.34 | b | 49.54 | b | 39.00 | c | 25.33 | c | 21.62 | e | 35.33 | |||
1984 | 15.86 | b | 13.50 | c | 23.48 | 28.67 | 40.96 | c | 47.46 | b | 56.03 | a | 55.00 | b | 48.36 | b | 32.62 | e | 24.77 | d | ----- | z | 35.16 | a | ||
1985 | 19.43 | a | 17.43 | g | 27.72 | b | 33.73 | d | 41.80 | f | 47.96 | f | 56.63 | a | 54.00 | a | 43.04 | d | 38.86 | c | 23.40 | j | 17.36 | f | 39.06 | e |
1986 | 20.29 | j | 21.94 | j | 28.00 | j | 32.62 | i | 36.14 | j | 49.48 | i | 53.59 | i | 55.24 | j | 45.38 | i | 34.45 | i | 25.78 | l | 19.50 | i | ----- | z |
1987 | 13.36 | i | 23.06 | j | ----- | z | 31.68 | h | 40.05 | k | 46.95 | h | 52.17 | h | 54.05 | j | 46.35 | j | 37.90 | j | 24.84 | k | 14.39 | h | ----- | z |
1988 | ----- | z | 21.06 | k | 23.04 | h | 33.45 | j | 40.24 | j | 51.43 | i | 56.61 | m | 56.78 | h | 41.48 | i | 38.74 | l | 25.40 | j | 13.55 | i | ----- | z |
1989 | 12.57 | j | 16.72 | j | 28.91 | i | 33.65 | j | 38.10 | j | 45.48 | g | 57.35 | k | 53.68 | i | 45.57 | i | 36.19 | j | 20.71 | f | 12.70 | h | ----- | z |
1990 | 12.83 | h | 20.86 | f | 26.55 | k | 35.66 | a | 38.45 | 50.81 | i | 59.05 | i | 55.18 | i | 52.42 | k | 36.38 | j | 26.07 | a | 12.55 | 28.18 | h | ||
1991 | 18.12 | f | 23.96 | 26.57 | a | 28.40 | 38.03 | 46.33 | 55.13 | 56.68 | 48.07 | 37.00 | 27.43 | 18.48 | 36.92 | a | ||||||||||
1992 | 11.48 | 25.79 | 29.79 | c | 36.50 | d | 44.33 | d | 46.86 | a | 53.04 | d | 53.52 | b | 46.22 | c | 38.52 | d | 20.21 | a | 12.45 | i | 36.93 | a | ||
1993 | 25.32 | i | 24.27 | f | 26.67 | a | 30.71 | b | 39.96 | c | 45.93 | a | 49.65 | 55.07 | a | 46.28 | a | 35.48 | d | 23.29 | b | 16.15 | e | 36.92 | b | |
1994 | 14.04 | e | 18.12 | b | 27.41 | b | 31.43 | 40.60 | a | 50.07 | 55.60 | a | 57.26 | 48.15 | c | 36.00 | b | 19.78 | c | 19.67 | a | 34.84 | ||||
1995 | 21.68 | 26.60 | c | 28.63 | a | 27.60 | 35.79 | c | 45.55 | a | 50.00 | d | 56.48 | b | 48.47 | 30.54 | c | 25.00 | h | 19.71 | j | 37.13 | b | |||
1996 | 13.78 | h | 20.75 | i | 23.16 | l | 28.55 | h | 38.71 | n | 50.33 | l | 56.05 | l | 54.71 | n | 45.70 | t | 32.00 | k | 27.38 | n | 16.30 | k | ----- | z |
1997 | 12.26 | l | 20.17 | j | 24.10 | k | 30.32 | k | 41.62 | o | 46.65 | m | 53.86 | j | 54.90 | j | 51.25 | j | 34.45 | i | 27.17 | l | 15.75 | k | ----- | z |
1998 | 19.55 | k | 19.72 | j | 22.84 | l | 28.16 | k | 34.74 | l | 41.76 | i | 57.32 | i | 56.00 | m | 52.48 | i | 36.45 | k | 25.24 | m | 16.86 | i | ----- | z |
1999 | 17.58 | l | 19.37 | i | 27.18 | i | 29.25 | n | 37.71 | q | 47.53 | k | 57.00 | k | 55.58 | l | 46.75 | j | 35.44 | o | 25.17 | l | 13.10 | k | ----- | z |
2000 | 20.00 | n | 21.89 | j | 27.43 | h | 33.17 | l | 40.17 | m | 50.56 | n | 55.62 | r | 56.42 | l | 47.93 | o | 37.58 | l | 19.82 | m | 18.19 | o | ----- | z |
2001 | 16.87 | p | 19.53 | i | 26.24 | j | 32.72 | l | 40.11 | m | 46.60 | o | 53.44 | m | 55.56 | m | 46.80 | o | 37.76 | n | 26.00 | k | 13.70 | k | ----- | z |
2002 | 17.52 | j | 13.53 | i | 22.95 | j | 34.56 | l | 38.06 | m | 47.53 | o | 56.53 | n | 52.80 | p | 49.29 | m | 35.37 | l | 24.33 | l | 16.05 | l | ----- | z |
2003 | 23.62 | j | 19.72 | j | 26.79 | l | 29.61 | l | 40.40 | p | 47.25 | n | 56.44 | m | 57.38 | o | 47.83 | l | 39.56 | m | 22.83 | l | 15.15 | k | ----- | z |
2004 | 16.63 | l | 15.50 | k | 30.14 | i | 33.61 | l | 40.93 | p | 46.84 | k | 52.82 | n | 51.63 | l | 44.76 | m | 37.89 | l | 25.55 | j | 18.60 | k | ----- | z |
2005 | 23.56 | o | 25.11 | j | 24.65 | k | 29.32 | k | 39.10 | k | 43.37 | k | 53.14 | q | 53.32 | l | 47.67 | o | 36.44 | m | 23.50 | l | 13.26 | l | ----- | z |
2006 | 13.37 | l | 17.56 | j | 22.32 | l | 31.07 | o | 40.20 | p | 51.41 | m | 55.36 | q | 54.65 | n | 41.80 | o | 31.14 | q | 27.06 | l | 16.24 | n | ----- | z |
2007 | 12.11 | m | 21.76 | k | 27.10 | j | 30.25 | n | 40.79 | l | 46.62 | n | 58.48 | j | 54.29 | q | ----- | z | 28.96 | e | 24.88 | m | 14.29 | c | 21.62 | j |
2008 | 9.70 | a | 19.50 | i | 23.29 | g | 24.59 | c | 33.79 | b | 46.67 | c | 56.53 | a | 56.15 | d | 47.00 | d | 31.28 | b | 23.08 | e | 17.39 | h | 36.53 | c |
2009 | 19.88 | e | 21.08 | d | 26.41 | d | 28.42 | d | 44.61 | 49.53 | o | 58.14 | i | 53.72 | f | 47.44 | l | 32.83 | h | 25.15 | d | 13.48 | f | 27.59 | f | |
2010 | 10.50 | o | 21.88 | c | 24.48 | d | 32.27 | 37.41 | b | 49.27 | 58.61 | 56.71 | c | 49.00 | a | 39.00 | 22.10 | a | 24.80 | a | 37.78 | a | ||||
2011 | 10.48 | 10.78 | a | 24.55 | 29.10 | 35.06 | 45.67 | 56.87 | a | 57.52 | 48.47 | 34.90 | 23.40 | 14.87 | 32.64 | |||||||||||
2012 | 16.92 | f | 17.83 | 24.71 | 35.20 | 42.74 | 51.17 | 59.52 | 58.13 | 48.93 | 36.52 | 27.17 | 15.39 | 37.94 | a | |||||||||||
2013 | 8.26 | 18.85 | b | 26.27 | a | 32.20 | 39.39 | 51.28 | a | 59.74 | 56.26 | 49.90 | 31.47 | a | 26.83 | 14.93 | a | 34.61 | ||||||||
2014 | 15.42 | 21.57 | 25.79 | g | 32.57 | 40.61 | 47.52 | e | 59.10 | 51.84 | l | 51.37 | 39.55 | 22.57 | 31.43 | x | 36.70 | c | ||||||||
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.95 | h | 54.61 | 55.00 | 48.85 | c | 41.42 | e | 21.19 | c | 16.89 | d | 39.66 | f | ||
2016 | 16.03 | a | 19.69 | 27.08 | f | 31.14 | b | 38.61 | 44.38 | q | 55.75 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.25 | g | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.40 | 19.21 | 23.76 | 29.99 | 37.65 | 45.82 | 54.73 | 53.79 | 46.09 | 34.74 | 22.88 | 15.33 | 32.64 | |||||||||||||
S.D. | 4.87 | 4.77 | 2.89 | 2.89 | 2.95 | 2.67 | 2.45 | 2.51 | 2.74 | 2.97 | 3.10 | 4.39 | 1.40 | |||||||||||||
SKEW | -0.30 | -0.45 | -0.08 | 0.10 | 0.39 | -0.41 | -0.29 | -0.35 | 0.00 | 0.29 | -0.64 | -0.52 | -0.57 | |||||||||||||
MAX | 21.81 | 27.21 | 29.79 | 36.50 | 44.84 | 51.28 | 59.74 | 58.13 | 51.67 | 42.19 | 28.82 | 24.80 | 35.33 | |||||||||||||
MIN | -1.10 | 6.25 | 17.77 | 24.27 | 31.52 | 38.20 | 49.65 | 47.52 | 39.93 | 28.87 | 13.60 | 4.03 | 28.46 | |||||||||||||
YRS | 61 | 62 | 62 | 65 | 66 | 63 | 63 | 61 | 65 | 65 | 65 | 59 | 44 |