YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 89.50 | o | 71.86 | a | 62.81 | 41.76 | a | 35.33 | a | 52.94 | h | |
1932 | 30.13 | 35.04 | b | 43.03 | 57.97 | 65.55 | 74.73 | 86.35 | 84.67 | a | 79.50 | 62.32 | 54.13 | 30.09 | i | 61.22 | a | |||||||||
1933 | 33.06 | 31.19 | a | 44.83 | a | 55.23 | 60.87 | 82.04 | f | 90.94 | 85.39 | 80.55 | j | ----- | z | ----- | z | 48.82 | c | 56.29 | d | |||||
1934 | 43.40 | a | 49.30 | a | 60.42 | 67.10 | 75.03 | 76.33 | 91.16 | ----- | z | 76.60 | o | 69.23 | 54.40 | 35.65 | 62.20 | b | ||||||||
1935 | 39.31 | b | 35.07 | 40.45 | 57.65 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.33 | a | 40.67 | 39.68 | 43.09 | f | ||||
1936 | 34.58 | 35.46 | c | 46.50 | c | 58.06 | m | ----- | z | ----- | z | ----- | z | ----- | z | 71.12 | m | ----- | z | 52.60 | 40.48 | 41.93 | g | |||
1937 | 19.97 | a | 37.26 | a | 53.97 | ----- | z | ----- | z | 74.57 | 87.65 | 86.28 | m | 81.87 | 64.90 | a | 59.03 | 42.37 | a | 57.95 | c | |||||
1938 | 41.21 | q | ----- | z | ----- | z | 53.57 | w | ----- | z | ----- | z | 90.87 | p | 89.88 | n | 87.90 | j | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | 38.63 | a | 60.93 | 66.58 | 72.53 | 85.81 | 86.39 | 80.23 | 72.48 | 44.90 | 39.46 | g | 67.61 | c | ||||||||
1953 | 46.72 | b | 43.07 | a | 51.57 | a | 56.03 | 61.29 | n | 68.93 | b | 89.14 | b | 82.46 | e | 80.59 | c | 65.39 | h | 55.36 | e | 38.55 | b | 61.24 | b | |
1954 | 39.26 | 48.17 | d | 45.04 | c | 59.90 | a | 72.86 | c | 71.86 | b | 89.21 | b | 81.04 | e | 76.15 | c | 63.44 | d | 55.69 | a | 36.52 | 61.59 | |||
1955 | 30.65 | 34.48 | a | 40.43 | a | 49.07 | 63.21 | c | 77.17 | 83.78 | d | 89.79 | b | 76.54 | b | 65.95 | i | 43.33 | 39.26 | d | 57.06 | a | ||||
1956 | 37.63 | d | 34.07 | a | 47.21 | c | 58.89 | c | 68.76 | b | 75.93 | b | 88.08 | e | 82.04 | e | 79.54 | b | 58.74 | d | 44.72 | e | 40.22 | d | 59.65 | |
1957 | 29.71 | 40.68 | 48.87 | 55.18 | b | 63.89 | c | 77.38 | f | 87.65 | e | 85.92 | g | 80.28 | e | 57.25 | c | 45.26 | c | 41.24 | b | 55.00 | b | |||
1958 | 37.54 | e | 46.24 | c | 45.28 | b | 54.61 | b | 73.30 | a | 73.54 | d | 84.96 | h | 89.52 | d | 74.07 | c | 69.11 | c | 48.93 | c | 48.18 | c | 60.03 | a |
1959 | 41.14 | c | 39.43 | 49.68 | 61.00 | b | 60.71 | c | 81.19 | d | 90.33 | a | 84.44 | d | 69.72 | e | 62.57 | c | 53.56 | c | 41.66 | b | 61.29 | |||
1960 | 33.45 | b | 36.33 | b | 51.08 | e | 59.27 | d | 65.29 | g | 82.71 | f | 92.92 | e | 82.04 | d | 80.26 | c | 63.38 | e | 46.86 | a | 40.29 | c | 58.59 | b |
1961 | 43.00 | 44.50 | d | 48.43 | c | 57.56 | e | 71.00 | g | 85.72 | a | 90.24 | b | 90.41 | b | 70.96 | c | 60.41 | d | 46.78 | g | 35.68 | f | 65.69 | c | |
1962 | 33.00 | b | 39.26 | a | 44.52 | b | 63.37 | c | 63.04 | g | 77.36 | b | 85.00 | c | 83.28 | f | 78.68 | h | 63.19 | d | 49.64 | e | 43.26 | d | 55.40 | c |
1963 | 36.07 | c | 49.58 | d | 50.24 | f | 48.44 | l | 67.04 | g | 69.32 | e | 84.00 | 86.34 | b | 80.63 | c | 66.50 | c | 47.70 | 38.07 | a | 62.02 | c | ||
1964 | 34.80 | a | 36.43 | a | 41.04 | c | 54.83 | 64.26 | 69.53 | 87.35 | 84.00 | c | 72.93 | c | 67.35 | 44.24 | a | 38.65 | 57.95 | |||||||
1965 | 35.55 | 44.93 | a | 49.06 | ----- | z | 62.60 | a | 72.70 | 84.27 | a | 81.28 | b | 67.50 | 70.45 | 51.13 | 40.93 | a | 60.04 | a | ||||||
1966 | 38.13 | a | 38.96 | b | 51.03 | a | 61.13 | 74.10 | b | 76.07 | a | 88.25 | c | 86.59 | b | 77.85 | c | 64.38 | b | 49.93 | b | 39.80 | a | 62.19 | ||
1967 | 40.08 | e | 45.26 | a | 48.90 | b | 48.07 | c | 67.73 | a | 72.76 | a | 90.31 | b | 92.61 | c | 80.38 | d | 64.59 | b | 49.23 | 35.03 | 61.25 | |||
1968 | 36.96 | h | 49.14 | a | 54.90 | 55.80 | 66.82 | c | 77.63 | c | 90.32 | c | 76.94 | 74.57 | b | 64.07 | d | 45.38 | f | 35.77 | a | 64.60 | b | |||
1969 | 38.17 | b | 39.00 | 47.79 | b | 59.69 | a | 71.72 | b | 73.28 | a | 87.20 | a | 89.47 | a | 78.55 | a | 55.77 | 51.55 | a | 41.37 | a | 61.13 | |||
1970 | 38.77 | a | 48.29 | 46.71 | 49.21 | a | 66.94 | 75.93 | 88.19 | 90.28 | b | 70.96 | b | 58.03 | a | 47.33 | 34.58 | 59.60 | ||||||||
1971 | 38.97 | 44.07 | a | 44.57 | a | 56.77 | 66.42 | 72.10 | 85.42 | 89.85 | e | 69.40 | e | 57.93 | a | 44.75 | b | 33.23 | 58.62 | |||||||
1972 | 34.19 | 42.76 | 53.53 | a | 55.07 | 69.69 | b | 77.00 | 85.61 | 86.77 | 70.69 | a | 60.79 | c | 43.46 | b | 34.38 | b | 59.50 | |||||||
1973 | 35.17 | a | 44.29 | 47.07 | a | 55.34 | a | 71.13 | 79.27 | 88.40 | a | 85.00 | b | 74.97 | a | 63.10 | 43.41 | a | 41.03 | 60.68 | ||||||
1974 | 33.84 | 41.96 | 47.90 | 56.13 | 62.56 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.40 | ----- | z | 45.65 | g | |||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | 61.08 | g | 72.15 | d | 86.06 | 79.22 | h | 74.10 | a | 56.61 | 42.03 | 38.32 | 61.55 | f | ||||
1976 | ----- | z | ----- | z | 38.39 | 55.27 | 72.10 | a | 73.93 | a | 87.56 | f | 77.03 | a | 76.68 | b | 65.84 | 51.29 | i | 45.00 | 63.03 | d | ||||
1977 | 33.10 | b | 47.15 | a | 44.72 | b | 63.76 | a | 58.78 | d | 82.57 | b | 87.41 | d | 86.13 | a | 72.11 | c | 62.27 | e | 47.89 | c | 41.59 | b | 60.62 | |
1978 | 39.07 | a | 40.67 | d | 55.83 | b | 54.96 | b | 62.56 | f | 75.00 | r | 87.40 | f | 82.26 | d | 73.24 | a | 70.07 | b | 45.48 | a | 33.07 | a | 54.96 | c |
1979 | 27.00 | 39.41 | a | 50.23 | a | 55.54 | b | 67.21 | g | 79.00 | g | 89.29 | 83.43 | a | 84.28 | e | 67.17 | b | 44.47 | 44.33 | d | 58.52 | b | |||
1980 | 36.73 | e | 45.89 | b | ----- | z | 62.37 | c | 61.46 | e | 73.38 | d | 86.13 | a | 82.60 | a | 79.97 | 70.28 | b | 52.90 | a | 46.23 | a | 63.45 | a | |
1981 | 38.17 | a | 43.39 | 51.13 | a | 60.50 | b | 62.29 | c | 75.33 | 88.28 | b | 91.48 | 79.08 | d | 60.48 | 53.38 | d | 41.76 | j | 63.96 | a | ||||
1982 | 34.00 | b | 39.25 | 46.40 | a | 51.14 | b | 60.22 | v | 76.60 | 81.42 | 87.80 | a | 78.17 | l | 58.30 | a | 40.96 | b | 36.37 | d | 55.22 | b | |||
1983 | 42.62 | e | 44.10 | g | 48.24 | f | 50.56 | e | 64.90 | a | 73.65 | d | 84.50 | c | 83.89 | c | 74.79 | a | 65.54 | e | 46.70 | 30.79 | b | 61.79 | b | |
1984 | 30.69 | b | 38.68 | a | 47.15 | d | 54.43 | b | 66.67 | g | 70.74 | c | 88.77 | e | 88.35 | e | 70.67 | l | 47.24 | j | ----- | z | 34.92 | e | 56.72 | d |
1985 | 32.70 | d | 36.22 | a | 44.38 | b | 50.75 | r | 67.68 | c | 81.33 | c | 90.96 | d | 83.20 | f | 66.75 | f | 59.40 | f | 38.75 | b | 33.85 | e | 53.23 | d |
1986 | 44.52 | d | 45.08 | c | 56.07 | c | 57.85 | d | 67.13 | a | 83.23 | d | 82.90 | k | 91.58 | g | 71.55 | h | 65.52 | j | ----- | z | ----- | z | 58.98 | f |
1987 | 34.60 | a | 44.22 | a | 49.41 | b | 71.11 | k | 73.23 | e | 81.14 | w | 85.24 | f | ----- | z | ----- | z | 72.31 | b | 48.96 | c | 36.40 | k | 53.79 | f |
1988 | 34.55 | b | 46.93 | b | 50.86 | b | 61.50 | d | 66.79 | b | 81.55 | h | 93.43 | j | 88.47 | a | 76.07 | c | 74.78 | d | 43.18 | h | 34.43 | h | 62.49 | d |
1989 | 33.57 | c | 32.35 | b | 50.22 | d | 62.46 | b | 67.04 | f | 80.85 | d | 90.33 | d | 81.26 | h | 77.00 | j | 63.75 | g | 49.37 | k | 42.11 | l | 58.30 | f |
1990 | 40.90 | a | 39.68 | 53.50 | c | 65.21 | f | 63.83 | b | 79.33 | i | ----- | z | 84.48 | h | 82.83 | g | 64.18 | i | 52.05 | h | 31.13 | 45.81 | g | ||
1991 | 37.43 | c | 51.08 | c | 47.52 | 52.76 | e | 60.88 | g | 71.61 | b | 88.83 | b | 89.11 | c | 79.87 | g | 63.86 | b | 45.57 | i | 41.75 | c | 60.44 | c | |
1992 | 40.48 | d | 49.52 | b | 58.62 | g | 64.20 | 78.56 | d | 80.65 | d | 83.19 | d | 90.46 | e | ----- | z | 67.57 | c | 39.50 | f | 34.42 | g | 69.33 | d | |
1993 | 31.78 | d | 36.38 | d | 50.04 | d | 54.04 | b | 70.12 | e | 71.72 | a | 76.19 | d | 81.76 | b | 78.33 | i | 63.00 | e | 46.19 | i | 39.87 | 57.49 | b | |
1994 | 43.14 | b | 40.43 | e | 57.58 | 61.59 | a | 68.48 | h | 82.00 | c | 91.62 | e | 89.80 | f | 82.10 | i | 62.00 | e | 38.74 | c | 36.04 | e | 57.01 | c | |
1995 | 40.26 | d | 53.93 | n | 48.57 | a | 55.54 | d | 63.59 | b | 72.50 | 84.93 | c | 87.36 | f | 81.00 | i | 64.67 | j | 56.73 | h | 38.38 | g | 60.90 | f | |
1996 | 38.07 | d | 41.57 | a | 51.46 | e | 59.30 | c | 64.25 | c | 79.33 | c | 90.52 | b | 88.23 | e | 73.46 | d | 58.04 | e | 51.50 | n | 40.08 | f | 64.42 | b |
1997 | 38.82 | c | 42.81 | b | 54.67 | d | 55.96 | c | 71.80 | a | 75.09 | g | 85.89 | d | 87.44 | d | 79.03 | a | 61.85 | d | 51.30 | g | 38.93 | d | 61.72 | b |
1998 | 43.00 | a | 42.19 | a | 49.25 | c | 54.54 | b | 59.07 | c | 70.45 | a | 88.85 | e | 89.81 | d | 78.00 | g | 63.24 | j | 48.35 | d | 40.93 | q | 60.61 | c |
1999 | 40.08 | r | 40.71 | d | 51.24 | b | 54.67 | 62.69 | e | 76.82 | b | 88.39 | c | 87.37 | a | 77.69 | d | 69.43 | c | 57.36 | h | 40.18 | i | 67.67 | c | |
2000 | 39.43 | a | 46.56 | d | 51.36 | c | 65.39 | b | 67.97 | 82.24 | a | 89.27 | e | 90.24 | b | 76.29 | i | 60.31 | b | 38.29 | f | 38.33 | j | 65.86 | c | |
2001 | ----- | z | 41.72 | c | 52.24 | b | 57.37 | k | 76.50 | m | 78.94 | l | 88.21 | g | 93.61 | c | 82.78 | g | 68.96 | e | 54.50 | j | 35.95 | i | 64.13 | h |
2002 | 36.16 | f | 43.19 | b | 46.04 | c | 58.73 | h | 68.28 | f | 80.68 | e | 93.78 | d | 84.73 | e | 77.77 | d | 62.33 | j | 50.95 | h | 43.06 | m | 71.03 | f |
2003 | 46.84 | f | 42.30 | e | 51.33 | d | 53.23 | h | 70.48 | d | 80.70 | c | 95.26 | 90.50 | i | 83.74 | k | 74.53 | l | ----- | z | ----- | z | 68.02 | g | |
2004 | ----- | z | 41.50 | o | 54.00 | n | 64.31 | d | 68.33 | m | 78.76 | m | 90.28 | f | 84.87 | h | 75.93 | p | ----- | z | ----- | z | ----- | z | 64.31 | k |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 50.29 | n | 52.32 | b | 36.52 | d | 44.42 | j |
2020 | 39.62 | e | 40.71 | a | 52.24 | f | 56.17 | l | 66.30 | d | 70.46 | f | ----- | z | ----- | z | ----- | z | 68.33 | y | ----- | z | ----- | z | 48.88 | i |
2021 | ----- | z | 40.91 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.68 | 41.71 | 48.72 | 57.46 | 67.13 | 75.95 | 87.82 | 86.23 | 76.17 | 64.11 | 47.82 | 38.88 | 60.34 | |||||||||||||
S.D. | 4.86 | 4.81 | 4.65 | 4.45 | 4.67 | 4.26 | 3.32 | 3.91 | 4.07 | 4.61 | 4.95 | 4.24 | 1.28 | |||||||||||||
SKEW | -0.68 | -0.09 | -0.06 | 0.03 | 0.29 | 0.33 | -0.73 | -0.39 | -0.23 | 0.26 | 0.13 | 0.28 | -0.44 | |||||||||||||
MAX | 46.72 | 51.08 | 60.42 | 67.10 | 78.56 | 85.72 | 95.26 | 93.61 | 84.28 | 74.78 | 59.03 | 48.82 | 62.19 | |||||||||||||
MIN | 19.97 | 31.19 | 38.39 | 48.07 | 58.78 | 68.93 | 76.19 | 76.94 | 67.50 | 55.77 | 38.74 | 30.79 | 57.95 | |||||||||||||
YRS | 51 | 54 | 53 | 47 | 40 | 45 | 47 | 42 | 37 | 45 | 40 | 42 | 12 |