YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.20 | o | 68.74 | 64.69 | 57.97 | 48.83 | e | 41.33 | f | 35.80 | p | 60.06 | h | |||
1938 | 29.73 | 31.78 | a | 36.52 | a | 46.16 | a | 52.26 | 61.36 | e | 68.34 | 64.26 | 58.28 | e | 47.50 | 31.39 | u | 27.07 | x | 49.62 | b | |||||
1939 | 31.83 | g | 27.80 | 40.65 | a | 50.00 | 55.90 | 57.08 | 68.80 | a | 68.05 | 58.64 | a | 48.21 | 37.05 | 36.61 | c | 49.89 | a | |||||||
1940 | 30.00 | 36.34 | a | 42.05 | 46.03 | 56.61 | 64.62 | 67.63 | 68.05 | 56.20 | 49.29 | 32.64 | a | 32.65 | a | 48.51 | ||||||||||
1941 | 29.84 | 34.55 | 41.03 | 44.45 | 53.48 | a | 58.60 | f | 68.57 | a | 64.03 | a | 52.53 | 46.17 | a | 38.15 | c | 38.69 | r | 47.28 | b | |||||
1942 | 21.00 | a | 28.00 | b | 36.05 | 46.87 | 48.60 | 56.95 | 69.00 | 65.98 | 57.90 | e | 48.69 | d | 37.88 | f | 33.07 | b | 46.55 | a | ||||||
1943 | 25.44 | 32.91 | 37.52 | 49.00 | 49.88 | a | 54.57 | 66.33 | b | 64.40 | 61.98 | g | 47.11 | d | 36.85 | f | 30.09 | b | 45.72 | b | ||||||
1944 | 22.00 | 32.24 | f | 39.22 | d | 43.57 | g | 53.23 | k | 56.02 | f | 63.79 | n | 62.34 | f | 58.80 | j | 52.43 | d | 33.57 | 26.58 | 34.76 | g | |||
1945 | 28.85 | 35.20 | 36.27 | 43.67 | 53.32 | 57.13 | 69.19 | 65.40 | 55.70 | 50.69 | 36.36 | a | 28.33 | b | 46.68 | |||||||||||
1946 | 26.21 | b | 30.21 | 40.60 | 46.72 | 52.42 | 58.32 | 67.32 | 66.11 | 55.30 | 42.02 | 34.15 | 33.18 | 46.05 | ||||||||||||
1947 | 24.03 | 36.52 | 41.02 | 45.80 | 57.73 | 55.12 | 67.19 | 63.37 | 57.47 | 48.13 | 34.57 | c | 29.44 | 46.70 | ||||||||||||
1948 | 31.08 | a | 30.36 | 34.32 | 41.68 | 50.70 | a | 61.60 | a | 64.48 | 63.15 | 55.15 | 45.95 | a | ----- | z | 22.48 | 45.54 | a | |||||||
1949 | 10.62 | a | 29.48 | 37.95 | a | 48.63 | 55.85 | 61.25 | 67.92 | a | 66.03 | 57.56 | e | 42.14 | c | 41.78 | 28.95 | 45.68 | ||||||||
1950 | 23.19 | d | 31.29 | b | 35.33 | b | 43.38 | d | 51.15 | a | 58.10 | 67.43 | a | 66.16 | c | 56.79 | a | 50.23 | c | 39.02 | c | 35.57 | a | 46.47 | ||
1951 | 25.55 | b | 32.88 | b | 33.17 | a | 47.79 | d | 53.14 | c | 58.65 | d | 67.15 | e | 64.72 | b | 57.94 | f | 42.58 | f | 33.50 | 25.55 | 44.21 | b | ||
1952 | 22.11 | 27.09 | 30.88 | f | 48.65 | c | 53.35 | 57.17 | 67.98 | 66.52 | 59.28 | 51.67 | d | 30.18 | 28.89 | 46.63 | a | |||||||||
1953 | 37.84 | 34.36 | f | 38.53 | 42.58 | 46.87 | 54.38 | 67.53 | 64.13 | 60.05 | 47.97 | a | 40.74 | a | 31.42 | 48.37 | a | |||||||||
1954 | 32.40 | 37.00 | 35.22 | b | 46.06 | c | 54.84 | f | 55.69 | c | 68.17 | a | 61.78 | a | 57.23 | f | 44.89 | i | 40.82 | 26.98 | 44.90 | c | ||||
1955 | 21.72 | a | 26.98 | 34.25 | a | 39.02 | 49.47 | b | 61.95 | b | 64.48 | 67.71 | 60.98 | j | 48.12 | b | 32.52 | c | 32.13 | a | 43.49 | a | ||||
1956 | 30.24 | 25.21 | a | 37.92 | 46.69 | a | 54.56 | 58.93 | 67.77 | a | 63.48 | f | 57.28 | a | 45.33 | e | 34.17 | c | 28.41 | b | 44.23 | a | ||||
1957 | 18.35 | a | 30.57 | a | 39.06 | e | 44.88 | a | 53.11 | 61.54 | d | 65.82 | f | 63.44 | d | 58.94 | d | 44.44 | f | 32.77 | f | 32.37 | a | 44.70 | c | |
1958 | 30.82 | a | 38.98 | c | 35.25 | a | 43.28 | a | 58.98 | 60.46 | b | 67.81 | b | 69.34 | b | 56.52 | b | 50.14 | b | 37.83 | 35.93 | b | 48.78 | |||
1959 | 34.11 | 33.25 | 37.30 | a | 47.32 | 48.40 | 63.35 | 69.78 | a | 64.82 | c | 54.22 | 46.73 | i | 36.45 | 24.40 | 46.67 | a | ||||||||
1960 | 23.23 | a | 29.66 | 40.66 | 45.22 | 50.23 | 62.52 | c | 71.23 | 63.73 | c | 59.18 | 47.02 | 35.67 | 27.55 | 46.32 | ||||||||||
1961 | 30.40 | 37.80 | 38.75 | a | 44.29 | b | 51.05 | a | 65.76 | c | 69.47 | a | 70.12 | b | 52.37 | 45.70 | d | 33.83 | a | 27.82 | a | 47.28 | ||||
1962 | 18.91 | d | 30.11 | 36.39 | d | 48.52 | a | 49.68 | 59.41 | a | 63.48 | c | 64.04 | h | 59.74 | k | 47.58 | 39.43 | a | 33.68 | c | 42.72 | b | |||
1963 | 26.08 | 41.32 | 37.98 | 40.53 | 54.77 | a | 58.17 | c | 63.97 | 64.61 | 62.11 | c | 51.31 | 38.43 | 28.24 | 47.29 | ||||||||||
1964 | 28.31 | 30.67 | 34.91 | c | 42.95 | a | 51.13 | 57.79 | a | 68.32 | 63.92 | a | 55.36 | a | 49.18 | 34.28 | a | 31.73 | a | 45.71 | ||||||
1965 | 30.88 | a | 36.25 | 37.35 | 47.32 | 50.44 | 59.35 | 65.58 | 63.30 | a | 52.88 | b | 50.60 | b | 39.07 | 26.30 | c | 46.61 | ||||||||
1966 | 27.84 | 31.04 | 38.66 | b | 45.75 | 55.33 | a | 58.37 | 66.10 | b | 66.45 | c | 60.50 | 47.36 | b | 39.80 | 30.93 | b | 47.34 | |||||||
1967 | 33.94 | 36.37 | a | 37.09 | b | 37.65 | 53.02 | a | 60.23 | 70.74 | 69.77 | 62.40 | 47.02 | 39.17 | 26.95 | 47.86 | ||||||||||
1968 | 28.50 | 38.71 | 40.87 | 42.03 | 52.10 | 60.47 | 69.18 | 62.16 | 57.23 | 46.32 | 37.28 | 30.21 | 47.09 | |||||||||||||
1969 | 29.60 | 28.82 | 35.98 | 46.37 | 57.13 | d | 60.82 | 66.95 | 65.97 | 61.05 | b | 42.00 | c | 35.82 | 32.94 | 46.95 | ||||||||||
1970 | 32.94 | 37.59 | 37.97 | 38.93 | 53.26 | 62.27 | 69.74 | 67.73 | 53.50 | 44.05 | a | 38.63 | 26.81 | 46.95 | ||||||||||||
1971 | 31.90 | 34.20 | 34.84 | 43.97 | a | 53.27 | a | 58.07 | a | 67.58 | 69.79 | 52.32 | 44.26 | b | 36.13 | 27.53 | 46.15 | |||||||||
1972 | 25.98 | 33.33 | 42.90 | 42.98 | 54.79 | 60.69 | a | 66.90 | 66.45 | 51.03 | 45.42 | 35.53 | 21.97 | 45.67 | ||||||||||||
1973 | 26.98 | 33.88 | 36.58 | 42.66 | a | 55.07 | b | 60.98 | a | 66.98 | a | 67.36 | f | 57.26 | a | 47.34 | i | 39.50 | 34.39 | i | 46.65 | c | ||||
1974 | 28.28 | b | 34.39 | i | 37.31 | d | 43.98 | d | 50.80 | h | 66.71 | p | 61.89 | q | 63.84 | o | 57.41 | m | 45.53 | m | 36.38 | j | 31.26 | n | 36.52 | i |
1975 | 25.20 | a | 30.10 | g | 35.08 | 36.34 | h | 53.25 | q | 58.83 | f | 70.60 | f | 62.41 | d | 57.12 | f | 46.98 | i | 32.21 | k | 34.79 | j | 40.90 | i | |
1976 | 30.16 | b | 33.24 | f | 33.07 | d | 42.32 | b | 54.73 | c | 55.15 | f | 67.26 | f | 61.12 | c | 59.43 | a | 46.04 | e | 36.88 | i | 26.66 | f | 46.70 | e |
1977 | 18.54 | f | 34.56 | d | 34.97 | a | 48.78 | c | 47.19 | d | 65.45 | h | 65.19 | e | 69.44 | n | 58.30 | h | 47.93 | q | 34.85 | f | 31.77 | e | 43.74 | f |
1978 | 33.27 | r | 35.24 | e | 43.72 | a | 43.32 | 49.98 | a | 58.27 | b | 66.42 | 64.02 | a | 53.96 | c | 47.09 | d | 31.88 | 23.14 | b | 47.00 | a | |||
1979 | 17.39 | 31.16 | l | 40.22 | a | 43.27 | d | 53.56 | e | 62.21 | i | 67.57 | d | 64.30 | i | 61.92 | l | 49.84 | b | 31.78 | 32.40 | b | 42.00 | d | ||
1980 | 27.81 | b | 36.18 | g | 36.83 | s | 47.08 | d | 52.00 | c | 55.73 | f | 67.28 | a | 62.91 | b | 58.13 | c | 44.38 | e | 37.43 | c | 29.97 | 47.44 | c | |
1981 | 32.05 | a | 32.38 | c | 39.06 | 47.80 | c | 51.57 | a | 58.68 | 65.31 | 68.03 | 57.88 | 43.67 | e | 37.93 | 32.74 | b | 47.26 | |||||||
1982 | 23.76 | 30.42 | b | 36.85 | a | 40.60 | a | 51.02 | 59.73 | 64.15 | d | 65.25 | e | 54.52 | 45.22 | a | 31.07 | c | 26.97 | 44.13 | ||||||
1983 | 32.26 | 35.90 | c | 39.95 | 41.37 | 53.03 | b | 57.97 | a | 62.90 | b | 66.58 | 56.11 | b | 48.30 | a | 38.55 | 24.53 | 46.45 | |||||||
1984 | 18.52 | h | 26.17 | k | 38.04 | g | 40.52 | j | 51.87 | e | 57.29 | b | 69.26 | b | 66.12 | a | 54.10 | f | 42.68 | c | 36.65 | d | 23.29 | g | 53.98 | f |
1985 | 19.89 | d | 25.48 | d | 32.20 | a | 46.48 | a | 52.80 | a | 61.74 | a | 71.35 | 62.37 | a | 50.34 | a | 40.34 | l | ----- | z | 11.15 | e | 43.38 | b | |
1986 | 27.95 | t | 33.69 | t | 43.75 | k | 44.03 | m | 53.05 | i | 64.30 | j | 62.42 | e | 69.03 | k | ----- | z | 54.88 | k | 48.25 | p | 26.97 | n | 62.42 | k |
1987 | 24.81 | g | 36.19 | j | 37.56 | d | 45.61 | k | 52.68 | l | 60.42 | j | 63.22 | d | 64.46 | f | 57.00 | p | 50.21 | j | 37.92 | j | 29.17 | j | 50.39 | j |
1988 | 22.65 | r | 31.12 | m | 37.22 | m | 46.74 | m | 51.24 | l | 61.67 | g | 66.92 | l | 64.16 | l | 55.12 | i | 52.29 | j | 37.22 | l | 29.80 | u | ----- | z |
1989 | 22.39 | m | ----- | z | 39.72 | m | 48.41 | g | 51.94 | d | 63.20 | h | 67.14 | f | 62.15 | a | 57.42 | e | 45.36 | j | 35.93 | g | 29.79 | e | 50.33 | h |
1990 | 32.08 | f | 30.22 | c | 39.81 | g | 51.14 | e | 49.48 | d | 61.71 | b | 70.43 | b | 65.31 | g | 62.31 | d | 47.09 | c | 36.82 | m | 21.29 | e | 49.21 | d |
1991 | 27.56 | 39.00 | f | 37.98 | i | 41.92 | j | 49.95 | b | 55.73 | o | ----- | z | 66.93 | i | 59.05 | 47.44 | 35.80 | j | 30.88 | c | 42.97 | g | |||
1992 | 30.90 | 38.45 | 43.22 | a | 49.13 | 58.24 | 62.64 | b | 64.05 | b | 66.50 | a | 57.27 | d | 48.69 | 32.95 | 25.68 | a | 48.14 | |||||||
1993 | 19.44 | 22.30 | 36.84 | 43.53 | a | 55.37 | 55.03 | 57.40 | 60.84 | 56.48 | 47.94 | 28.71 | a | 29.40 | 42.77 | |||||||||||
1994 | 32.92 | a | 31.17 | b | 41.81 | 46.77 | 54.52 | 59.27 | 69.32 | 67.38 | a | 59.11 | b | 45.57 | c | 29.72 | a | 26.97 | a | 47.04 | ||||||
1995 | 33.02 | g | 39.44 | c | 39.23 | a | 42.53 | a | ----- | z | 56.95 | 64.84 | 62.10 | b | 57.16 | b | 47.07 | h | 43.45 | a | 30.38 | g | 50.71 | d | ||
1996 | 31.05 | 32.74 | 40.69 | 45.63 | 50.35 | 59.31 | a | 68.42 | 64.72 | a | 55.08 | 46.98 | a | 37.72 | 33.45 | 47.18 | ||||||||||
1997 | 30.18 | c | 33.48 | 41.92 | a | 44.58 | 57.45 | a | 58.27 | 64.76 | 65.68 | 58.47 | 45.92 | 38.46 | f | ----- | z | 50.07 | b | |||||||
1998 | 35.39 | 33.52 | 39.72 | b | 44.39 | c | 50.39 | v | 57.78 | g | 70.16 | f | 65.34 | c | 60.72 | e | 45.56 | m | 36.75 | b | 25.93 | b | 42.72 | d | ||
1999 | 30.90 | e | 29.63 | b | 38.40 | b | 39.97 | o | 50.45 | k | 56.62 | q | 67.28 | o | 63.85 | g | 55.35 | d | 49.29 | q | 41.64 | i | 30.40 | p | 38.57 | h |
2000 | 30.26 | l | 37.29 | l | 39.94 | o | 49.14 | l | 54.76 | f | 63.00 | m | 64.12 | r | 68.04 | q | 53.23 | q | 42.21 | x | 27.53 | m | 27.84 | i | ----- | z |
2001 | 24.53 | n | 24.00 | r | 41.31 | m | 46.56 | m | 57.06 | n | 59.93 | h | 66.08 | f | 68.18 | i | 58.00 | s | 49.75 | y | 38.39 | l | 29.50 | m | ----- | z |
2002 | 31.38 | s | 31.55 | r | 32.65 | n | 42.62 | v | 52.61 | m | 56.86 | w | 72.46 | h | 61.27 | r | 62.90 | y | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.83 | x | 73.21 | l | 67.80 | k | 58.50 | k | 50.83 | k | 31.21 | p | 32.18 | q | ----- | z |
2004 | 23.14 | t | 28.32 | l | 43.79 | q | 45.94 | m | 52.71 | q | 62.37 | o | 68.96 | s | 70.31 | w | 56.22 | n | 46.09 | o | 36.39 | p | 31.91 | n | ----- | z |
2005 | 28.17 | s | 29.04 | n | 39.50 | m | 46.31 | v | 50.73 | p | 57.29 | r | 70.33 | p | ----- | z | 58.41 | s | 46.92 | r | 34.64 | p | 16.64 | t | ----- | z |
2006 | 31.50 | q | 30.36 | n | 36.29 | n | 42.25 | r | 53.85 | n | 63.75 | r | 70.85 | u | 63.28 | m | ----- | z | 43.83 | m | 37.67 | o | 27.85 | r | ----- | z |
2007 | 25.59 | n | 33.38 | l | 41.16 | l | 43.07 | w | 53.77 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | 21.93 | d | 30.62 | e | 34.69 | b | 39.47 | a | 53.20 | c | 58.70 | b | 68.12 | o | 66.43 | a | 57.52 | b | 47.57 | a | 38.88 | b | 28.26 | b | 43.39 | a |
2009 | 31.35 | e | 34.75 | t | 37.69 | g | 42.23 | d | 55.18 | a | 58.67 | a | 68.71 | 65.42 | 61.47 | a | 42.87 | 33.36 | a | 21.60 | a | 48.09 | b | |||
2010 | 33.27 | c | 32.52 | c | 36.59 | b | 41.48 | b | 46.48 | a | 57.12 | a | 65.65 | 63.48 | a | 57.18 | 48.89 | 33.90 | 29.21 | 45.48 | ||||||
2011 | 27.16 | 29.03 | j | 37.66 | 40.32 | 48.24 | 56.88 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.05 | g | |||||
2012 | ----- | z | 32.16 | 38.79 | 46.05 | 51.44 | 57.05 | 68.66 | 67.37 | 59.50 | 45.87 | 37.12 | a | 28.29 | 48.39 | a | ||||||||||
2013 | 18.22 | a | 30.43 | 39.50 | 43.83 | 53.82 | 60.30 | 71.00 | 66.52 | e | 56.88 | a | 41.00 | s | 35.73 | 20.95 | c | 45.20 | a | |||||||
2014 | 30.00 | 24.44 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.00 | k | |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.35 | ----- | z | ----- | z | 48.35 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.37 | 32.58 | 37.95 | 44.64 | 52.59 | 59.22 | 67.13 | 65.25 | 57.12 | 47.09 | 36.12 | 28.52 | 46.61 | |||||||||||||
S.D. | 5.27 | 3.95 | 2.66 | 2.99 | 2.87 | 2.48 | 2.56 | 2.24 | 2.80 | 2.50 | 3.26 | 4.47 | 1.25 | |||||||||||||
SKEW | -0.74 | -0.09 | 0.09 | -0.13 | 0.04 | 0.28 | -1.05 | 0.17 | -0.30 | -0.19 | -0.19 | -1.07 | -1.05 | |||||||||||||
MAX | 37.84 | 41.32 | 43.72 | 51.14 | 58.98 | 65.76 | 71.35 | 70.12 | 62.40 | 52.43 | 43.45 | 36.61 | 48.78 | |||||||||||||
MIN | 10.62 | 22.30 | 32.20 | 37.65 | 46.48 | 54.38 | 57.40 | 60.84 | 50.34 | 42.00 | 28.71 | 11.15 | 42.77 | |||||||||||||
YRS | 58 | 53 | 59 | 59 | 58 | 53 | 57 | 55 | 54 | 52 | 49 | 54 | 27 |