YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.21 | i | ----- | z | 70.08 | ----- | z | 42.44 | ----- | z | 27.65 | 46.72 | i | |||
1930 | 5.24 | 28.86 | 30.24 | 40.35 | 41.20 | d | 61.79 | i | 70.53 | 68.72 | a | 57.43 | b | 44.02 | 32.53 | a | 21.98 | a | 40.10 | a | ||||||
1931 | 26.95 | 33.09 | 39.94 | 46.02 | 54.89 | 62.38 | 72.30 | a | 68.65 | 55.30 | 47.60 | b | 31.16 | a | 22.77 | a | 46.75 | |||||||||
1932 | 22.13 | 20.17 | 37.63 | 45.50 | 52.57 | a | 61.00 | a | 66.90 | 64.21 | 58.40 | 46.31 | 39.48 | 18.43 | c | 44.39 | ||||||||||
1933 | 23.11 | 18.42 | b | 37.23 | 43.85 | 48.66 | 64.77 | 70.80 | a | 66.28 | a | 55.38 | a | 50.40 | 36.82 | 38.02 | 46.14 | |||||||||
1934 | 35.68 | 37.75 | 46.13 | 49.83 | 58.31 | 58.98 | 68.68 | 67.27 | 55.47 | 48.13 | d | 37.81 | a | 22.35 | d | 48.87 | ||||||||||
1935 | 23.27 | a | 23.68 | 31.73 | 41.57 | 47.60 | 56.80 | 64.00 | 65.23 | 58.62 | 45.73 | 31.53 | 28.37 | 43.18 | ||||||||||||
1936 | 26.73 | 29.06 | b | 40.32 | 49.70 | 57.39 | 63.53 | 72.15 | a | 69.84 | 56.17 | 49.06 | 34.13 | 29.84 | 48.16 | |||||||||||
1937 | 10.68 | 25.66 | 38.05 | 44.10 | 55.45 | 59.27 | 70.35 | 65.95 | 59.70 | 48.68 | 41.02 | 34.10 | 46.08 | |||||||||||||
1938 | 29.65 | 32.96 | 34.75 | a | 46.50 | 50.68 | 60.65 | 69.11 | 65.55 | 62.52 | 48.18 | 32.27 | 31.00 | 46.98 | ||||||||||||
1939 | 30.62 | a | 23.75 | 38.23 | 48.25 | 55.71 | 58.00 | 70.39 | ----- | z | 57.93 | 46.31 | 37.52 | 37.13 | 45.80 | a | ||||||||||
1940 | 31.10 | 34.62 | 41.00 | 45.43 | 55.97 | 65.03 | 68.94 | 68.26 | 56.98 | 48.87 | 31.37 | 34.74 | 48.53 | |||||||||||||
1941 | 28.87 | 36.52 | 41.50 | 45.07 | 55.15 | 59.67 | 70.89 | 67.31 | 53.73 | 47.11 | 40.77 | 32.56 | 48.26 | |||||||||||||
1942 | 19.40 | 27.77 | 37.23 | 47.77 | 49.20 | a | 57.30 | 70.73 | 67.23 | 59.03 | 49.26 | 38.02 | 32.56 | 46.29 | ||||||||||||
1943 | 28.37 | 33.70 | 39.16 | 51.05 | 51.13 | 57.33 | 67.82 | 66.08 | 62.77 | 49.61 | 38.15 | 30.55 | 47.98 | |||||||||||||
1944 | 23.97 | 31.90 | 37.02 | 44.62 | 53.53 | 57.02 | 66.82 | 65.44 | 58.53 | 52.42 | 33.78 | 29.10 | 46.18 | |||||||||||||
1945 | 29.08 | a | 35.89 | 36.40 | 43.67 | 53.15 | 57.90 | 70.65 | 67.95 | 55.88 | 51.74 | 34.93 | 29.47 | 47.23 | ||||||||||||
1946 | 27.40 | 31.89 | 40.85 | 49.30 | 52.37 | 60.22 | 69.50 | 68.53 | 55.38 | 40.40 | 33.28 | 32.90 | 46.84 | |||||||||||||
1947 | 20.81 | 36.18 | 40.89 | 45.57 | 58.61 | 57.46 | b | 68.77 | 66.97 | 59.25 | 50.97 | 34.12 | 28.58 | 47.35 | ||||||||||||
1948 | 32.08 | 30.93 | 33.98 | 43.13 | 51.84 | 61.30 | 66.45 | 64.66 | 56.09 | a | 47.48 | a | 34.17 | 20.37 | a | 45.21 | ||||||||||
1949 | 7.08 | 26.31 | a | 37.82 | 48.73 | 56.77 | 62.93 | 68.62 | a | 67.03 | 60.40 | 41.71 | b | 41.67 | 25.53 | 45.38 | ||||||||||
1950 | 21.07 | a | 33.65 | b | 35.85 | a | 43.80 | 50.34 | 60.16 | a | 69.34 | 67.40 | 58.78 | a | 51.73 | 40.52 | 35.81 | 47.37 | ||||||||
1951 | 25.23 | a | 34.82 | 34.15 | 48.12 | a | 54.74 | 57.57 | 69.63 | a | 66.60 | a | 59.10 | 45.58 | 35.77 | 25.08 | 46.37 | |||||||||
1952 | 21.73 | a | 26.17 | 32.69 | b | 49.00 | 53.89 | 59.48 | 68.15 | 66.79 | 60.30 | 52.10 | 30.93 | a | 30.76 | 46.00 | ||||||||||
1953 | 40.22 | a | 35.41 | 39.47 | 44.07 | 50.43 | d | 56.48 | a | 69.08 | 66.60 | a | 60.23 | 48.58 | 42.22 | 30.63 | 48.62 | |||||||||
1954 | 32.70 | a | 37.50 | 35.76 | 47.88 | 57.50 | 57.92 | 69.89 | 63.44 | 56.05 | 46.07 | a | 40.17 | 24.65 | a | 47.46 | ||||||||||
1955 | 19.00 | 22.91 | 32.45 | 40.55 | 50.38 | a | 61.32 | 66.60 | 68.40 | 56.70 | 48.53 | 34.78 | a | 32.97 | 44.55 | |||||||||||
1956 | 30.90 | 26.55 | a | 38.90 | 47.02 | b | 56.24 | b | 60.68 | 70.06 | 64.29 | 57.36 | a | 46.40 | 31.00 | v | 28.31 | e | 47.88 | a | ||||||
1957 | 19.66 | b | 32.08 | b | 40.05 | c | 44.21 | b | 52.82 | 62.21 | a | 66.65 | 64.35 | a | 58.59 | b | 45.34 | f | 34.17 | 33.23 | a | 46.18 | a | |||
1958 | 28.19 | 39.70 | a | 35.76 | b | 43.63 | 58.45 | b | 61.20 | 66.83 | a | 69.72 | a | 57.56 | c | 50.73 | 37.98 | 36.52 | 48.86 | |||||||
1959 | 33.19 | 32.35 | a | 38.10 | 47.20 | 48.76 | 63.14 | a | 70.87 | a | 66.32 | l | 55.55 | a | 48.98 | 36.15 | 26.66 | 45.54 | a | |||||||
1960 | 21.85 | 29.67 | 39.55 | a | 45.85 | 51.16 | 62.80 | 71.63 | 62.92 | a | 59.74 | a | 46.82 | 37.14 | a | 29.61 | 46.56 | |||||||||
1961 | 31.38 | a | 38.46 | 39.74 | 43.08 | 52.42 | 67.32 | 69.47 | 71.90 | a | 53.35 | 46.73 | 34.38 | 28.31 | 48.05 | |||||||||||
1962 | 20.46 | c | 30.11 | a | 35.60 | b | 48.92 | 50.67 | a | 62.69 | f | 65.63 | 64.57 | a | 60.07 | a | 48.06 | 39.52 | e | 34.53 | 45.29 | a | ||||
1963 | 25.83 | e | 39.69 | d | 38.92 | a | 40.73 | 54.70 | a | 58.65 | d | 64.60 | 66.48 | 62.45 | i | 54.55 | j | 40.42 | d | 30.52 | b | 46.05 | b | |||
1964 | 25.98 | 27.19 | 35.11 | h | 40.80 | 49.79 | 57.38 | 67.95 | 65.15 | d | 54.07 | 49.04 | c | 34.70 | 30.58 | g | 47.20 | b | ||||||||
1965 | 28.91 | c | 35.91 | 35.08 | 46.98 | d | 47.59 | c | 58.48 | 65.75 | c | 63.68 | 50.46 | c | 50.15 | 37.48 | c | 28.20 | d | 45.72 | ||||||
1966 | 26.84 | 28.22 | a | 37.31 | b | 45.67 | c | 56.12 | k | 57.61 | g | 66.60 | 66.65 | a | 62.71 | i | 44.50 | e | 38.83 | f | 30.08 | f | 45.11 | e | ||
1967 | 31.71 | b | 37.46 | a | 37.76 | j | 38.71 | d | 51.83 | k | 60.79 | b | 72.13 | 72.10 | 62.28 | 46.44 | n | 39.23 | f | 18.15 | r | 53.60 | e | |||
1968 | ----- | z | ----- | z | 39.90 | j | 41.50 | c | 51.19 | o | 61.17 | c | 71.74 | l | 62.66 | c | 57.23 | b | 47.17 | a | 38.90 | j | 27.96 | q | 53.95 | g |
1969 | 30.73 | 32.00 | f | 36.07 | h | 43.45 | t | 54.56 | o | 60.92 | d | 68.97 | a | 68.48 | e | ----- | z | 41.40 | f | 35.97 | o | 31.97 | n | 57.27 | h | |
1970 | 31.64 | i | 38.35 | e | 36.25 | q | 38.24 | i | 48.94 | o | 60.71 | d | 68.96 | c | 69.04 | q | 54.81 | n | 44.09 | n | 38.62 | m | 26.81 | m | 56.01 | i |
1971 | 29.78 | h | 36.42 | p | ----- | z | 44.00 | o | 53.33 | s | 57.71 | i | 69.29 | j | 70.30 | h | 52.42 | k | 43.79 | q | 35.89 | p | 23.22 | m | ----- | z |
1972 | 25.33 | h | ----- | z | 42.63 | l | 43.74 | g | 56.68 | a | 63.02 | a | 67.38 | f | 67.24 | d | 54.48 | f | 45.19 | b | 35.52 | c | 21.15 | a | 48.13 | f |
1973 | 24.02 | e | 34.33 | b | 36.77 | g | 42.35 | c | 54.79 | e | 61.59 | a | 67.95 | a | 65.88 | c | 57.02 | a | 46.95 | k | 34.50 | h | 33.24 | n | 50.99 | d |
1974 | 22.83 | h | 32.35 | k | 36.17 | j | 42.24 | g | 50.09 | c | 65.48 | b | 67.76 | b | 66.07 | h | 58.21 | b | 47.94 | e | 38.45 | k | 26.79 | j | 57.90 | g |
1975 | 21.27 | p | 33.14 | j | 39.23 | r | 37.52 | i | 50.83 | m | 58.98 | j | 71.22 | a | 64.38 | j | 58.93 | c | 48.06 | n | 34.52 | i | 34.06 | n | 65.07 | j |
1976 | 28.72 | o | 34.11 | o | 34.44 | m | 43.64 | e | 55.59 | i | 58.70 | b | 68.95 | c | 62.22 | d | 58.68 | k | 43.04 | r | 38.06 | l | 28.17 | j | 58.38 | h |
1977 | 21.42 | e | 33.47 | i | 34.00 | r | 49.90 | j | 46.85 | h | 66.74 | a | 69.04 | f | 69.35 | g | 57.70 | c | 47.42 | e | 35.05 | j | 36.50 | j | 48.32 | h |
1978 | 32.39 | c | 35.61 | i | 44.17 | k | 43.22 | e | 49.04 | g | 58.28 | c | 67.97 | 66.92 | g | 55.00 | a | 48.05 | c | 31.06 | m | 23.76 | b | 46.95 | e | |
1979 | 13.66 | i | 33.27 | h | 39.59 | h | 45.07 | c | 53.04 | h | 61.59 | b | 69.56 | d | 66.95 | b | 60.32 | b | 49.39 | d | 30.77 | 32.03 | m | 54.81 | e | |
1980 | 29.30 | f | 39.47 | m | 36.25 | k | 46.18 | k | 50.89 | h | 55.56 | f | 67.93 | a | 63.57 | c | 57.44 | e | 46.00 | b | 37.32 | b | 31.17 | e | 50.57 | f |
1981 | 29.65 | k | 31.55 | g | 38.15 | u | ----- | z | ----- | z | 58.69 | n | 65.81 | 68.28 | d | 57.53 | k | 42.94 | f | 38.26 | c | 33.64 | i | 57.45 | i | |
1982 | 22.15 | h | 29.53 | i | 36.61 | i | 40.39 | h | 50.06 | d | 60.25 | b | 66.81 | b | 66.87 | h | 56.10 | d | 44.88 | k | 29.52 | j | 26.30 | h | 58.30 | h |
1983 | 31.38 | g | 37.72 | e | 39.89 | c | 40.62 | d | 53.71 | g | 59.79 | d | 65.95 | c | 68.89 | h | 57.69 | f | 49.92 | l | 37.13 | k | 22.97 | p | 48.79 | g |
1984 | 13.95 | k | 26.22 | t | ----- | z | 44.86 | p | 53.32 | i | 58.78 | c | 71.23 | 69.44 | o | 57.60 | i | 42.00 | p | 38.66 | n | 23.60 | g | 65.00 | j | |
1985 | 20.90 | g | 28.34 | l | 34.67 | k | 48.60 | f | 54.63 | h | 63.07 | g | 73.07 | h | 64.70 | k | 50.30 | g | 44.76 | h | 25.75 | h | 18.36 | q | ----- | z |
1986 | 34.14 | q | 38.19 | t | 45.20 | k | 45.14 | e | 52.95 | k | 65.50 | f | 65.28 | d | 71.06 | f | 54.02 | g | 46.34 | i | 40.12 | r | 27.44 | g | 55.21 | j |
1987 | 24.58 | g | 35.79 | g | 40.96 | h | 51.00 | c | 56.21 | c | 63.48 | c | 64.52 | c | 64.14 | f | 58.67 | d | 49.50 | d | 36.24 | a | 27.62 | f | 54.23 | e |
1988 | 23.12 | k | 34.31 | c | 40.21 | c | 46.39 | g | 52.64 | b | 64.25 | f | 70.89 | i | 65.66 | i | 57.14 | p | 53.82 | t | 34.27 | o | ----- | z | 42.39 | i |
1989 | ----- | z | ----- | z | ----- | z | 40.41 | m | 42.93 | c | 58.38 | b | 71.97 | 66.73 | 57.93 | g | 46.52 | 34.80 | 27.65 | 49.85 | e | |||||
1990 | 25.52 | b | 26.35 | a | 38.82 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.27 | 22.40 | g | 31.49 | h | |
1991 | 23.29 | b | 36.94 | a | 35.85 | k | 41.30 | 48.03 | b | 56.50 | o | ----- | z | 67.25 | q | ----- | z | 45.18 | 35.78 | a | ----- | z | 38.42 | f | ||
1992 | ----- | z | ----- | z | 41.21 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.15 | h | ----- | z |
1994 | 32.24 | 29.29 | 41.11 | c | 46.43 | a | 55.35 | 61.10 | a | 68.52 | 65.52 | h | 58.55 | 45.03 | a | 28.66 | b | 26.50 | f | 46.63 | b | |||||
1995 | 32.92 | f | 39.63 | b | 39.60 | 43.25 | b | 52.76 | 57.10 | a | 65.83 | a | 62.58 | 58.23 | 44.83 | a | 41.53 | a | 30.59 | b | 48.72 | a | ||||
1996 | 30.80 | c | 30.90 | 40.02 | a | 45.05 | a | 50.56 | 60.37 | 68.82 | 66.08 | 53.82 | 46.11 | 37.60 | a | 33.28 | h | 48.19 | a | |||||||
1997 | 29.58 | a | 33.07 | a | 40.80 | a | 42.90 | a | 56.21 | 59.47 | 65.35 | 66.00 | 58.98 | 44.45 | 37.27 | h | 27.07 | a | 47.63 | a | ||||||
1998 | 36.03 | 34.24 | c | 40.03 | a | 43.60 | a | 49.48 | c | 56.35 | 69.44 | 67.97 | a | 61.03 | 43.92 | a | 37.91 | b | 25.91 | i | 49.09 | a | ||||
1999 | 29.93 | c | 32.15 | a | 37.10 | a | 41.52 | 49.88 | a | 57.62 | 65.02 | a | 66.68 | 55.58 | 47.60 | a | 41.27 | 27.40 | b | 45.98 | ||||||
2000 | 31.53 | b | 38.26 | b | 37.72 | b | 49.67 | d | 54.13 | 62.93 | h | 67.26 | b | 67.13 | 56.05 | 44.66 | c | 29.77 | 27.43 | c | 45.78 | a | ||||
2001 | 20.90 | a | 29.94 | c | 41.12 | e | 42.07 | 56.62 | c | 60.16 | a | 68.67 | j | 68.67 | h | 59.48 | 45.72 | d | 37.10 | 28.35 | a | 42.15 | b | |||
2002 | 27.62 | a | 31.84 | c | 36.12 | b | 45.60 | 53.07 | c | 61.55 | 70.44 | 62.37 | d | 56.34 | e | 41.50 | a | 35.16 | a | 31.88 | b | 46.12 | ||||
2003 | 35.27 | a | 31.32 | 41.12 | a | 41.82 | 52.67 | a | 61.50 | a | 73.77 | 66.16 | 60.69 | a | 52.18 | a | 32.56 | c | 31.57 | b | 48.39 | |||||
2004 | 25.26 | 27.41 | 42.95 | b | 46.42 | 50.29 | 60.78 | a | 69.14 | c | 67.53 | a | 56.75 | b | 47.95 | b | 32.70 | 30.36 | b | 46.46 | ||||||
2005 | 26.80 | c | 31.80 | 40.62 | e | 43.79 | d | 52.52 | b | 57.44 | d | 69.98 | a | 69.08 | e | 56.30 | c | 46.15 | a | 34.10 | d | 27.57 | c | 46.35 | ||
2006 | 31.40 | 31.39 | 35.26 | b | 45.23 | d | 53.02 | j | 63.81 | q | 73.12 | j | 63.35 | g | 56.38 | 44.66 | 37.47 | 27.58 | 38.67 | d | ||||||
2007 | 24.83 | e | 35.79 | g | 42.05 | b | 43.47 | 54.40 | 61.33 | 73.35 | 66.92 | 56.33 | 45.27 | 36.85 | 24.39 | 48.11 | a | |||||||||
2008 | 23.29 | c | 29.65 | b | 36.06 | 38.67 | 50.73 | 58.53 | 68.42 | 67.44 | 56.78 | 45.92 | 39.97 | 27.61 | 45.26 | |||||||||||
2009 | 29.40 | 32.16 | 36.21 | 42.27 | 53.73 | 59.73 | 68.31 | 67.41 | b | 62.03 | 41.97 | 36.97 | 22.44 | 46.05 | ||||||||||||
2010 | 34.03 | 34.46 | 38.79 | b | 40.87 | 45.44 | 57.68 | 66.44 | 65.22 | a | 57.78 | 50.87 | 32.60 | 29.73 | c | 46.16 | ||||||||||
2011 | 26.31 | 31.71 | b | 37.45 | 39.78 | a | 46.27 | 55.27 | 66.58 | 69.11 | 61.77 | 47.21 | 33.58 | 26.66 | 45.14 | |||||||||||
2012 | 30.29 | 32.76 | 39.67 | a | 46.07 | 50.48 | 57.83 | 71.53 | 69.13 | 58.95 | 45.73 | 37.83 | f | 30.39 | 48.44 | a | ||||||||||
2013 | 20.32 | f | 32.39 | 38.39 | 42.52 | 52.47 | 60.28 | 72.76 | 69.03 | 59.60 | 42.55 | 36.55 | 26.46 | c | 48.45 | a | ||||||||||
2014 | 31.84 | 37.17 | a | 40.45 | 43.58 | 52.94 | 59.78 | 71.31 | 67.19 | 59.38 | 50.31 | 36.97 | 35.43 | a | 48.86 | |||||||||||
2015 | 31.90 | a | 39.20 | a | 42.48 | 42.67 | 53.16 | 66.36 | a | 67.34 | 67.95 | 58.83 | 52.77 | 33.92 | 28.85 | 48.79 | ||||||||||
2016 | 29.83 | b | 37.02 | 40.94 | 47.63 | 52.08 | 62.68 | 67.42 | a | 66.71 | 55.95 | 49.34 | 40.90 | 23.48 | c | 47.83 | ||||||||||
2017 | 21.86 | c | 34.24 | a | 43.23 | a | 42.27 | 51.50 | 61.26 | a | 72.78 | a | 69.81 | 58.02 | 43.10 | 39.60 | 22.98 | k | 48.88 | a | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 26.75 | 32.19 | 38.38 | 44.61 | 52.36 | 60.28 | 68.76 | 66.74 | 57.79 | 47.18 | 36.13 | 28.88 | 46.77 | |||||||||||||
S.D. | 6.27 | 4.80 | 2.96 | 2.97 | 3.52 | 2.59 | 2.29 | 2.15 | 2.34 | 2.83 | 3.24 | 4.29 | 1.38 | |||||||||||||
SKEW | -1.10 | -0.60 | -0.37 | 0.21 | -0.61 | 0.61 | 0.04 | -0.06 | -0.20 | -0.13 | -0.08 | -0.13 | -0.25 | |||||||||||||
MAX | 40.22 | 39.70 | 46.13 | 51.05 | 58.61 | 67.32 | 73.77 | 72.10 | 62.77 | 52.77 | 42.22 | 38.02 | 48.87 | |||||||||||||
MIN | 5.24 | 18.42 | 30.24 | 38.67 | 41.20 | 55.27 | 64.00 | 62.22 | 50.46 | 40.40 | 28.66 | 18.43 | 43.18 | |||||||||||||
YRS | 66 | 67 | 63 | 71 | 67 | 72 | 76 | 67 | 70 | 70 | 65 | 60 | 40 |