YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.60 | o | 87.10 | 84.32 | 78.53 | 67.61 | c | 53.24 | e | 47.47 | p | 74.16 | g | |||
1938 | 40.55 | 41.52 | a | 46.73 | a | 63.03 | 68.16 | 77.37 | c | 84.90 | 84.45 | 76.96 | e | 64.35 | 43.78 | u | 43.11 | v | 64.80 | b | ||||||
1939 | 43.54 | g | 36.71 | 53.77 | a | 66.67 | 72.26 | 73.30 | 86.93 | a | 87.65 | 77.70 | 65.65 | 55.37 | 47.55 | b | 65.78 | a | ||||||||
1940 | 38.65 | 43.24 | 54.81 | 59.43 | 73.29 | 82.73 | 85.19 | 87.71 | 71.50 | 64.26 | 42.30 | 43.67 | a | 62.23 | ||||||||||||
1941 | 38.61 | 42.75 | 55.32 | 58.37 | 66.63 | a | 73.67 | f | 85.67 | a | 79.53 | a | 67.87 | 61.03 | a | 50.68 | b | 45.58 | l | 60.65 | b | |||||
1942 | 30.37 | a | 36.65 | b | 47.13 | 60.27 | 60.52 | 70.77 | 86.52 | 84.39 | 76.48 | e | 67.41 | d | 49.54 | f | 41.03 | b | 60.14 | a | ||||||
1943 | 34.39 | 42.18 | 49.06 | 62.57 | 64.10 | a | 68.17 | 84.10 | a | 82.94 | 83.00 | e | 62.11 | c | 49.52 | e | 41.97 | a | 60.34 | |||||||
1944 | 35.35 | 42.58 | e | 54.03 | b | 59.28 | e | 72.42 | g | 70.36 | e | 80.10 | j | 82.23 | 78.76 | i | 72.45 | b | 43.97 | 37.61 | 55.32 | c | ||||
1945 | 39.00 | 45.14 | 48.06 | 58.60 | 66.94 | 72.53 | 88.29 | 84.77 | 74.97 | 68.71 | 46.53 | 38.55 | 61.01 | |||||||||||||
1946 | 36.97 | b | 41.64 | 52.87 | 63.10 | 67.61 | 74.37 | 85.06 | 86.10 | 75.10 | 55.81 | 44.13 | 43.42 | 60.51 | ||||||||||||
1947 | 37.10 | 49.11 | 55.71 | 61.73 | 74.81 | 69.50 | 86.16 | 83.13 | 78.00 | 63.55 | 44.41 | c | 39.74 | 61.91 | ||||||||||||
1948 | 43.33 | a | 43.00 | 45.29 | 55.00 | 65.67 | a | 76.14 | a | 81.35 | 81.77 | 72.93 | 63.63 | a | ----- | z | 32.29 | 60.04 | a | |||||||
1949 | 26.07 | a | 39.96 | 48.45 | 65.80 | 70.10 | 79.83 | 86.65 | 85.58 | 77.77 | d | 61.21 | c | 58.97 | 39.81 | 61.68 | ||||||||||
1950 | 33.21 | c | 42.69 | b | 46.86 | b | 60.26 | c | 69.07 | a | 74.70 | 86.73 | a | 86.93 | c | 75.24 | a | 67.11 | c | 51.74 | c | 45.10 | a | 61.64 | ||
1951 | 35.76 | b | 43.04 | b | 46.23 | a | 64.37 | c | 68.82 | c | 75.65 | d | 87.38 | e | 84.41 | b | 79.60 | e | 57.73 | e | 45.50 | 33.94 | 60.20 | |||
1952 | 32.32 | 37.41 | 40.36 | f | 65.32 | b | 67.52 | 72.17 | 85.26 | 84.84 | 77.90 | 70.89 | d | 45.57 | 37.13 | 61.48 | a | |||||||||
1953 | 47.06 | 46.80 | c | 51.77 | 56.97 | 59.55 | 67.67 | 85.52 | 80.87 | 79.70 | 65.57 | a | 52.31 | a | 40.10 | 61.16 | ||||||||||
1954 | 40.71 | 47.25 | 47.14 | b | 61.52 | c | 72.27 | e | 69.82 | b | 87.30 | a | 79.23 | a | 76.77 | d | 64.62 | g | 55.13 | 38.10 | 61.39 | a | ||||
1955 | 32.35 | 37.39 | 47.13 | a | 50.23 | 65.14 | b | 78.43 | 82.10 | 88.61 | 75.30 | 65.86 | b | 44.04 | b | 40.30 | a | 58.91 | ||||||||
1956 | 38.32 | 35.29 | a | 50.74 | 61.72 | a | 68.16 | 75.43 | 84.87 | a | 81.92 | f | 77.86 | a | 59.43 | c | 48.33 | c | 39.38 | b | 58.14 | a | ||||
1957 | 28.93 | a | 41.63 | a | 49.11 | c | 57.38 | a | 64.81 | 77.65 | d | 84.27 | e | 81.19 | d | 78.59 | c | 55.16 | f | 44.79 | f | 41.37 | a | 60.49 | b | |
1958 | 38.20 | a | 47.46 | b | 45.57 | a | 54.83 | a | 75.16 | 74.00 | b | 84.14 | b | 86.28 | b | 74.04 | b | 69.10 | a | 49.43 | 45.90 | b | 62.01 | |||
1959 | 42.35 | 41.96 | 51.13 | a | 63.60 | 62.26 | 80.33 | 88.90 | a | 83.18 | c | 69.30 | 62.35 | h | 52.80 | 37.42 | 61.20 | a | ||||||||
1960 | 32.52 | 38.41 | 52.45 | 59.27 | 64.03 | 80.59 | c | 90.10 | 81.93 | a | 79.20 | 63.74 | 46.17 | 37.58 | 60.50 | |||||||||||
1961 | 42.10 | 46.79 | 50.00 | a | 59.62 | a | 66.87 | 84.50 | b | 89.60 | a | 88.53 | a | 68.97 | 60.93 | d | 47.69 | a | 37.00 | a | 61.88 | |||||
1962 | 32.11 | c | 39.39 | 47.85 | d | 65.48 | a | 63.35 | 77.24 | a | 83.50 | c | 83.38 | e | 79.63 | k | 64.74 | 51.14 | a | 42.41 | b | 59.15 | a | |||
1963 | 39.42 | 52.18 | 50.87 | 51.90 | 69.17 | a | 72.74 | c | 83.10 | 83.58 | 80.22 | c | 68.26 | 49.83 | 37.84 | 61.59 | ||||||||||
1964 | 37.42 | 43.03 | 46.29 | c | 58.59 | a | 67.42 | 72.60 | 86.71 | 82.70 | a | 74.52 | a | 69.52 | 46.03 | a | 39.87 | a | 60.39 | |||||||
1965 | 38.53 | a | 47.14 | 51.32 | 60.00 | 65.65 | 73.60 | 83.58 | 79.30 | a | 70.79 | b | 70.10 | a | 50.27 | 38.21 | b | 60.71 | ||||||||
1966 | 37.58 | 40.96 | 53.30 | a | 62.63 | 73.20 | a | 73.13 | 85.28 | b | 86.00 | b | 79.33 | 66.00 | a | 49.77 | 38.86 | b | 62.17 | |||||||
1967 | 42.74 | 48.19 | a | 48.83 | a | 48.93 | 69.00 | a | 75.53 | 89.13 | 90.39 | 81.97 | 64.35 | 51.07 | 37.71 | 62.32 | ||||||||||
1968 | 39.19 | 50.28 | 56.00 | 58.97 | 68.00 | 78.47 | 90.77 | 78.61 | 76.53 | 63.61 | 45.37 | 38.19 | 62.00 | |||||||||||||
1969 | 37.97 | 38.00 | 47.87 | 61.63 | 73.70 | d | 74.60 | 85.26 | 86.65 | 80.82 | b | 56.90 | b | 51.47 | 41.39 | 61.35 | ||||||||||
1970 | 40.48 | 48.75 | 50.00 | 52.83 | 69.23 | 76.90 | 88.74 | 89.29 | 73.20 | 60.43 | a | 47.53 | 35.71 | 61.09 | ||||||||||||
1971 | 40.52 | 44.96 | 45.97 | 57.86 | a | 67.83 | a | 72.76 | a | 85.32 | 88.84 | 71.97 | 60.41 | b | 47.33 | 36.68 | 60.04 | |||||||||
1972 | 36.39 | 43.97 | 55.68 | 56.57 | 70.68 | 78.38 | a | 86.10 | 86.52 | 70.13 | 62.65 | 45.10 | 32.94 | 60.42 | ||||||||||||
1973 | 37.00 | 43.86 | 48.97 | 58.10 | a | 71.73 | a | 79.52 | a | 87.73 | a | 86.89 | d | 75.07 | 65.45 | i | 47.80 | 43.23 | i | 63.67 | b | |||||
1974 | 38.41 | b | 48.35 | h | 49.22 | d | 57.69 | d | 66.50 | g | 85.00 | n | 80.73 | p | 85.06 | o | 81.47 | k | 64.26 | l | 50.91 | h | 41.42 | l | 48.44 | i |
1975 | 36.30 | a | 41.23 | f | 45.94 | 48.30 | g | 69.36 | q | 74.62 | f | 86.93 | d | 80.85 | d | 79.25 | f | 62.65 | h | 45.55 | j | 45.68 | i | 62.50 | h | |
1976 | 40.00 | b | 45.46 | e | 46.79 | c | 57.54 | b | 72.82 | c | 71.92 | e | 84.96 | f | 75.50 | c | 76.93 | a | 66.30 | d | 53.74 | g | 43.73 | e | 59.70 | b |
1977 | 33.00 | f | 48.60 | c | 48.33 | a | 67.86 | b | 60.71 | c | 83.33 | f | 84.81 | d | 88.44 | m | 77.64 | h | 66.20 | p | 47.32 | e | 39.30 | d | 56.71 | e |
1978 | 40.00 | r | 45.91 | e | 58.03 | a | 55.90 | 64.63 | a | 73.52 | a | 83.23 | 82.00 | a | 70.54 | b | 67.70 | d | 45.27 | 34.03 | b | 61.89 | a | |||
1979 | 28.13 | 40.59 | k | 52.23 | 55.38 | d | 68.23 | e | 78.82 | h | 85.89 | d | 79.38 | g | 80.00 | k | 64.17 | b | 43.57 | 42.72 | b | 55.04 | d | |||
1980 | 37.14 | b | 45.73 | g | 49.33 | s | 62.19 | d | 65.62 | b | 71.28 | e | 84.77 | a | 81.55 | b | 76.26 | c | 60.31 | e | 49.00 | c | 41.03 | 62.91 | b | |
1981 | 39.83 | a | 45.12 | c | 51.61 | 62.07 | b | 64.57 | a | 75.23 | 84.71 | 88.26 | 77.17 | 57.92 | e | 49.83 | 41.53 | a | 61.49 | |||||||
1982 | 33.61 | 40.81 | b | 47.33 | a | 54.90 | a | 66.65 | 74.87 | 81.00 | c | 83.65 | e | 71.87 | 60.90 | a | 42.41 | c | 35.74 | 57.81 | ||||||
1983 | 41.55 | 45.40 | c | 49.39 | 53.60 | 67.45 | b | 72.59 | a | 78.70 | a | 82.42 | 73.83 | a | 63.23 | a | 47.27 | 31.81 | 58.94 | |||||||
1984 | 27.78 | h | 36.68 | g | 47.38 | e | 51.56 | e | 63.50 | c | 69.24 | a | 81.93 | b | 80.93 | a | 68.33 | f | 53.46 | c | 44.89 | c | 32.78 | d | 58.41 | c |
1985 | 28.00 | c | 35.37 | a | 42.77 | a | 58.70 | 65.16 | 75.07 | a | 84.74 | 76.40 | a | 66.34 | a | 59.26 | l | 34.96 | f | 27.88 | e | 56.04 | b | |||
1986 | 41.50 | m | 39.09 | q | 56.10 | k | 56.67 | i | 69.41 | i | 81.30 | j | 79.27 | e | 86.95 | k | ----- | z | 73.15 | k | 60.43 | p | 38.35 | n | 79.27 | k |
1987 | 38.36 | f | 45.00 | h | 48.68 | c | 66.37 | k | 72.42 | l | 78.35 | j | 76.81 | d | 79.44 | f | 74.29 | p | 66.52 | j | 47.35 | j | 38.19 | j | 62.75 | j |
1988 | 36.31 | r | 44.94 | l | 51.22 | m | 61.18 | m | 66.89 | l | 74.04 | g | 83.16 | l | 80.95 | l | 71.24 | i | 68.50 | i | 46.50 | l | 39.10 | u | ----- | z |
1989 | 33.28 | m | ----- | z | 54.39 | m | 63.17 | g | 64.89 | d | 79.50 | h | 83.68 | f | 76.27 | a | 73.16 | e | 59.95 | j | 48.74 | g | 41.81 | e | 64.03 | h |
1990 | 43.80 | f | 42.60 | c | 53.58 | g | 66.68 | e | 63.56 | d | 77.89 | b | 86.79 | b | 80.08 | e | 79.31 | d | 63.00 | c | 48.76 | m | 34.12 | e | 66.00 | c |
1991 | 39.32 | 52.59 | f | 50.26 | h | 54.80 | j | 62.90 | b | 73.13 | o | ----- | z | 84.05 | i | 77.43 | 64.55 | 45.40 | j | 40.36 | c | 56.91 | g | |||
1992 | 41.00 | 50.48 | 58.77 | a | 64.43 | 77.00 | 79.24 | a | 81.48 | b | 85.40 | a | 76.85 | d | 65.68 | 42.40 | 34.58 | 63.11 | ||||||||
1993 | 29.03 | 31.25 | 46.58 | 56.14 | a | 70.10 | 69.13 | 72.81 | 76.90 | 75.60 | 62.52 | 42.76 | a | 38.23 | 55.92 | |||||||||||
1994 | 43.26 | 41.96 | a | 57.13 | 61.67 | 68.74 | 76.43 | 87.97 | 86.45 | 78.79 | b | 61.75 | c | 38.28 | a | 36.33 | a | 61.56 | ||||||||
1995 | 41.24 | f | 52.60 | c | 51.07 | a | 55.97 | a | ----- | z | 71.77 | 81.74 | 82.41 | b | 75.57 | b | 63.44 | f | 55.69 | a | 38.64 | f | 65.85 | d | ||
1996 | 39.23 | 43.17 | 53.10 | 59.87 | 63.90 | 75.31 | a | 87.06 | 83.43 | a | 73.00 | 62.83 | a | 48.93 | 41.00 | 60.90 | ||||||||||
1997 | 39.41 | b | 42.57 | 56.17 | a | 56.70 | 72.87 | a | 72.83 | 82.29 | 83.48 | 75.53 | 60.94 | 51.79 | f | ----- | z | 64.28 | b | |||||||
1998 | 46.32 | 43.61 | 51.79 | b | 57.79 | b | 63.89 | v | 73.30 | g | 87.12 | f | 84.32 | c | 77.88 | d | 61.77 | i | 45.48 | a | 35.17 | a | 55.30 | d | ||
1999 | 39.93 | d | 40.08 | b | 49.97 | a | 53.75 | n | 63.74 | h | 69.87 | o | 85.00 | o | 80.00 | g | 74.37 | c | 71.00 | p | 55.48 | i | 40.53 | n | 51.08 | h |
2000 | 39.82 | i | 47.50 | k | 53.18 | n | 64.40 | j | 67.93 | d | 81.53 | k | 82.93 | p | 86.69 | o | 72.93 | p | 56.25 | w | 37.68 | k | 35.92 | g | 67.93 | k |
2001 | 33.70 | k | 36.82 | q | 54.52 | j | 61.40 | j | 73.78 | m | 76.54 | f | 82.89 | c | 87.87 | h | 80.00 | o | 65.50 | y | 50.81 | i | 36.00 | j | 82.89 | k |
2002 | 39.81 | o | 42.17 | p | 47.65 | h | 57.09 | s | 68.47 | l | 77.50 | t | 91.74 | h | 81.85 | r | 84.71 | w | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.00 | x | 90.86 | j | 85.80 | k | 76.00 | k | 68.57 | j | 44.47 | o | 41.40 | p | ----- | z |
2004 | 31.42 | s | 38.47 | l | 58.50 | q | 61.35 | m | 69.57 | q | 81.20 | o | 86.25 | s | 87.50 | w | 73.18 | m | 60.94 | o | 48.71 | p | 41.00 | n | ----- | z |
2005 | 36.25 | s | 42.86 | n | 51.58 | l | 60.12 | v | 62.40 | p | 73.25 | r | 88.69 | o | ----- | z | 77.36 | s | 62.77 | r | 47.21 | p | 29.08 | r | ----- | z |
2006 | 40.21 | q | 43.07 | n | 46.53 | n | 55.17 | r | 69.53 | n | 78.83 | r | 87.10 | u | 80.06 | m | ----- | z | 58.56 | m | 49.73 | o | 39.85 | r | ----- | z |
2007 | 39.35 | n | 45.88 | l | 55.00 | l | 61.71 | w | 71.08 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | 33.80 | a | 41.07 | a | 45.76 | b | 53.41 | a | 66.97 | 74.38 | a | 85.18 | n | 83.10 | a | 74.79 | a | 62.23 | a | 50.14 | a | 38.93 | b | 56.78 | a | |
2009 | 40.50 | c | 48.00 | s | 50.20 | f | 55.89 | c | 70.19 | 71.17 | 85.74 | 81.39 | 80.28 | a | 56.52 | 47.40 | 32.50 | a | 62.16 | b | ||||||
2010 | 40.57 | a | 41.08 | c | 50.27 | a | 54.61 | b | 58.97 | a | 70.21 | a | 82.16 | 79.33 | a | 73.50 | 61.48 | 43.53 | 36.61 | 57.69 | ||||||
2011 | 35.65 | 39.61 | j | 47.10 | 51.40 | 60.29 | 69.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.84 | g | |||||
2012 | ----- | z | 42.45 | 49.81 | 58.00 | 64.48 | 71.53 | 83.87 | 83.84 | 75.83 | 59.52 | 46.21 | a | 35.58 | 61.01 | a | ||||||||||
2013 | 26.13 | a | 39.32 | 51.68 | 57.20 | 67.55 | 74.17 | 87.26 | 82.46 | e | 70.34 | a | 55.50 | s | 47.33 | 32.32 | c | 57.80 | a | |||||||
2014 | 41.87 | 33.33 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.87 | 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 | 65.06 | ----- | z | ----- | z | 65.06 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.29 | 43.04 | 50.15 | 58.85 | 67.37 | 74.45 | 84.90 | 83.44 | 75.57 | 63.49 | 47.85 | 38.34 | 60.76 | |||||||||||||
S.D. | 4.71 | 4.36 | 3.58 | 4.30 | 4.02 | 3.70 | 3.18 | 3.39 | 3.58 | 3.98 | 3.99 | 3.90 | 1.55 | |||||||||||||
SKEW | -0.59 | -0.07 | 0.50 | -0.05 | 0.13 | 0.44 | -1.15 | -0.24 | -0.41 | -0.12 | 0.40 | -0.13 | -1.36 | |||||||||||||
MAX | 47.06 | 52.60 | 58.77 | 67.86 | 77.00 | 84.50 | 90.77 | 90.39 | 83.00 | 72.45 | 58.97 | 47.55 | 63.11 | |||||||||||||
MIN | 26.07 | 31.25 | 42.77 | 48.93 | 58.97 | 67.67 | 72.81 | 75.50 | 66.34 | 53.46 | 38.28 | 27.88 | 55.92 | |||||||||||||
YRS | 58 | 56 | 60 | 61 | 60 | 56 | 60 | 59 | 58 | 53 | 52 | 56 | 31 |