YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | 39.87 | 49.82 | b | 55.42 | 65.72 | 71.50 | 70.07 | a | 59.90 | i | 50.05 | 43.59 | c | 38.43 | b | 53.83 | c | |||||
1940 | 28.83 | d | 31.73 | n | 42.19 | g | 48.79 | d | 61.30 | a | 71.10 | e | 75.12 | e | 72.00 | e | 63.00 | k | 52.39 | c | 35.81 | c | 32.48 | f | 55.67 | d |
1941 | 29.00 | a | 33.27 | q | ----- | z | 39.80 | e | 56.98 | g | 63.29 | b | 69.88 | f | 67.33 | e | 58.45 | j | 44.37 | p | 40.02 | e | 31.82 | f | 47.89 | g |
1942 | 28.90 | a | 24.32 | h | ----- | z | 45.48 | j | 55.11 | d | 68.36 | h | 74.25 | e | 71.42 | g | 66.66 | n | 55.65 | r | 42.66 | a | 35.04 | c | 47.19 | g |
1943 | 31.67 | d | 36.40 | c | 40.41 | d | 51.07 | g | 58.14 | f | 64.84 | b | 72.78 | b | 69.57 | b | 65.46 | d | 51.60 | b | 40.15 | d | ----- | z | 52.54 | c |
1944 | 27.33 | a | 28.64 | a | 33.37 | d | 40.93 | b | 53.48 | d | 62.10 | e | 69.85 | a | 70.48 | 62.21 | b | 51.72 | b | ----- | z | ----- | z | 50.01 | b | |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.73 | b | 70.95 | b | 69.92 | 63.53 | 51.92 | 45.60 | y | 28.55 | c | 57.93 | f | |||
1946 | 28.29 | n | ----- | z | ----- | z | 51.98 | 56.52 | a | 69.06 | f | 70.89 | 68.73 | 64.37 | c | 50.50 | i | 35.67 | u | 35.55 | b | 58.01 | f | |||
1947 | 29.03 | n | 36.90 | h | 42.00 | o | 50.11 | p | 59.59 | h | 63.96 | e | 71.89 | h | 67.36 | f | 66.54 | e | 51.54 | h | 31.07 | o | 28.50 | c | 53.00 | i |
1948 | 32.20 | d | 29.15 | b | 29.80 | h | 46.84 | e | 56.48 | j | 64.15 | d | 72.11 | 69.98 | 65.10 | 50.17 | k | 32.58 | l | ----- | z | 54.22 | e | |||
1949 | ----- | z | ----- | z | ----- | z | 53.84 | n | 56.11 | c | 63.72 | c | 71.13 | a | 69.55 | c | 64.75 | b | 47.98 | d | 48.10 | i | 41.07 | x | 62.21 | f |
1950 | 27.50 | y | 34.02 | f | 38.91 | d | 50.00 | d | 56.37 | d | 65.80 | 69.16 | 68.35 | 59.62 | 58.48 | 42.23 | 38.00 | m | 56.55 | c | ||||||
1951 | 31.15 | k | 33.40 | d | 37.24 | 47.38 | 56.53 | a | 66.17 | 74.92 | 68.95 | 64.67 | d | 49.63 | e | 34.94 | d | 26.57 | j | 53.38 | b | |||||
1952 | 29.84 | c | 30.97 | 30.31 | d | 47.78 | c | 58.62 | a | 66.42 | 71.41 | b | 70.67 | b | 63.34 | h | 58.02 | c | 32.40 | a | 29.50 | h | 49.64 | b | ||
1953 | 35.05 | 31.27 | 38.53 | a | 44.39 | b | 49.79 | 67.58 | 72.15 | a | 67.12 | a | 65.87 | c | 51.75 | a | 40.81 | a | 29.21 | c | 49.46 | |||||
1954 | 32.63 | 38.79 | 36.17 | h | 53.67 | a | 60.39 | 66.32 | 72.42 | e | 69.86 | j | 63.59 | c | 54.12 | c | 44.04 | c | 29.83 | b | 51.58 | b | ||||
1955 | 26.02 | 25.09 | 37.33 | g | 44.12 | 54.94 | 63.93 | a | 70.47 | a | 69.87 | 65.50 | a | 54.88 | b | 37.97 | 34.34 | c | 49.74 | a | ||||||
1956 | 35.09 | c | 28.17 | e | 39.84 | 45.84 | a | 55.76 | h | 70.00 | g | 71.15 | 67.79 | b | 68.23 | 54.21 | c | 35.95 | b | 31.92 | m | 49.59 | c | |||
1957 | 28.81 | m | 38.16 | 38.89 | c | 43.39 | c | 51.35 | 66.58 | 71.26 | 68.79 | 65.02 | 48.70 | a | 32.21 | b | 34.32 | c | 50.79 | a | ||||||
1958 | 30.98 | d | 36.36 | c | 32.97 | a | 43.86 | b | 60.58 | a | 69.86 | b | 72.83 | a | 76.12 | s | 61.88 | e | 53.48 | b | 42.83 | d | 39.12 | a | 49.52 | a |
1959 | 32.72 | b | 30.90 | c | 39.74 | b | 49.30 | c | 57.12 | a | 70.22 | 75.23 | a | 69.09 | b | 64.38 | f | 51.16 | c | 38.98 | b | 33.15 | a | 49.78 | a | |
1960 | 25.42 | a | 27.47 | 42.64 | c | 48.23 | d | 56.79 | b | 70.57 | 75.34 | 73.77 | a | 66.16 | a | 48.66 | c | 40.48 | b | 29.17 | e | 50.39 | ||||
1961 | 32.11 | 34.21 | 37.60 | b | 46.35 | 57.50 | 71.90 | 73.67 | b | 69.63 | 58.07 | a | 49.85 | 35.65 | d | 26.77 | a | 49.44 | ||||||||
1962 | 27.56 | 33.66 | 33.50 | a | 52.07 | a | 55.29 | 66.09 | a | 72.87 | 72.92 | 64.87 | 54.55 | i | 43.07 | 34.47 | 50.58 | a | ||||||||
1963 | 25.07 | c | 38.21 | 38.23 | a | 44.84 | b | 61.35 | a | 65.31 | d | 75.60 | a | 68.67 | b | 65.84 | b | 56.52 | d | 41.43 | a | 31.98 | b | 51.09 | ||
1964 | 27.26 | 28.00 | a | 32.88 | a | 42.88 | a | 56.62 | b | 65.13 | 74.25 | a | 69.52 | b | 62.22 | 57.53 | 35.59 | a | 29.36 | c | 48.44 | |||||
1965 | 32.50 | b | 31.81 | a | 33.89 | 43.85 | 51.63 | d | 62.02 | g | 70.45 | b | 69.91 | d | 57.72 | 54.71 | 43.17 | a | 32.29 | 47.45 | a | |||||
1966 | 27.55 | a | 26.44 | b | 41.45 | 49.33 | 60.16 | 66.35 | 72.10 | a | 71.30 | a | 63.55 | 51.39 | 43.33 | 30.26 | 50.27 | |||||||||
1967 | 29.87 | 35.71 | 42.95 | 42.95 | 54.11 | 62.05 | 71.29 | 69.81 | 61.57 | 55.11 | 44.05 | 24.63 | 49.51 | |||||||||||||
1968 | 27.87 | 36.09 | 39.79 | 43.08 | 55.31 | 69.07 | 71.23 | 65.71 | 62.57 | 54.23 | e | 37.63 | 26.23 | 49.07 | ||||||||||||
1969 | 31.93 | j | 30.07 | 33.74 | 48.72 | 59.02 | 63.95 | 72.32 | a | 72.65 | 64.88 | b | 45.81 | 37.80 | 34.32 | a | 51.21 | a | ||||||||
1970 | 30.82 | 37.55 | 35.50 | 40.98 | 57.36 | b | 65.33 | 72.76 | 71.47 | 59.95 | a | 46.68 | 39.88 | 30.30 | a | 49.05 | ||||||||||
1971 | 30.21 | 31.84 | 39.40 | 46.53 | 52.06 | 66.65 | 73.58 | a | 70.12 | a | 60.38 | 45.61 | 36.17 | 25.63 | 48.18 | |||||||||||
1972 | 31.60 | 37.36 | 46.97 | 48.17 | 57.42 | 65.78 | a | 74.00 | b | 68.55 | 61.50 | a | 47.79 | 32.64 | b | 26.10 | 49.82 | |||||||||
1973 | ----- | z | 30.23 | 32.18 | 40.17 | c | 56.52 | h | 65.76 | a | 71.28 | b | 69.81 | 60.95 | 53.48 | 39.15 | 32.16 | 49.52 | b | |||||||
1974 | 26.50 | 29.86 | 43.32 | 45.73 | 59.66 | 72.58 | 70.15 | a | 69.60 | 63.35 | 51.50 | 38.45 | 28.35 | 49.92 | ||||||||||||
1975 | 29.24 | 30.25 | 35.32 | 40.63 | 53.02 | a | 63.13 | 69.66 | 69.84 | 62.37 | 52.19 | 38.05 | 32.10 | 47.98 | ||||||||||||
1976 | 30.65 | 37.71 | 37.55 | 46.80 | 57.65 | 66.52 | a | 71.68 | 68.19 | 60.65 | 48.68 | 41.02 | 32.61 | 49.97 | ||||||||||||
1977 | 26.95 | 36.45 | 35.55 | 49.83 | 53.52 | 69.02 | 71.55 | 70.39 | 64.68 | 54.77 | a | 42.33 | 36.08 | 50.93 | ||||||||||||
1978 | 30.61 | 31.27 | 42.87 | 47.57 | 55.53 | 68.67 | 73.47 | 70.71 | 61.92 | 56.32 | 38.15 | 25.45 | 50.21 | |||||||||||||
1979 | 22.19 | 30.04 | 36.55 | 49.63 | 54.89 | 65.91 | a | 73.52 | a | 68.82 | 67.40 | 55.45 | 33.10 | a | 33.06 | 49.21 | ||||||||||
1980 | 32.00 | a | 35.33 | 34.89 | 46.19 | a | 51.65 | 67.05 | a | 71.95 | a | 69.05 | 62.47 | 50.33 | b | 41.12 | a | 38.74 | b | 50.06 | ||||||
1981 | 35.76 | 36.71 | 37.11 | 50.86 | a | 54.16 | 69.74 | a | 70.75 | a | 69.42 | a | 63.31 | i | 48.83 | a | 42.79 | a | 34.13 | a | 50.03 | a | ||||
1982 | 29.00 | d | 31.38 | 36.87 | h | 44.79 | a | 53.10 | 64.46 | d | 69.94 | e | 67.98 | d | 63.23 | f | 46.17 | g | 34.56 | d | 29.95 | 47.24 | c | |||
1983 | 32.28 | a | 33.64 | 36.88 | b | 39.76 | a | 53.59 | d | 63.53 | a | 69.73 | a | 68.90 | 65.07 | b | 51.66 | 39.09 | b | 31.98 | a | 48.84 | ||||
1984 | 29.76 | b | 33.00 | a | 37.50 | h | 43.79 | d | 62.28 | b | 66.00 | e | 70.62 | a | 67.57 | b | 64.50 | b | 44.70 | c | 38.88 | d | 30.47 | b | 50.14 | a |
1985 | 28.58 | a | 31.40 | b | 37.82 | c | 50.74 | c | 57.79 | c | 68.52 | b | 72.50 | b | 71.59 | c | 56.74 | g | 51.83 | e | 35.50 | f | 33.28 | a | 50.41 | b |
1986 | 38.87 | e | 36.74 | e | 44.39 | c | 48.30 | g | 57.44 | f | 68.41 | c | 69.38 | b | 71.05 | a | 58.20 | c | 48.33 | h | 38.59 | c | 32.65 | e | 50.92 | c |
1987 | 28.75 | c | 31.79 | g | 35.79 | c | 50.26 | e | 56.21 | c | 68.94 | e | 69.57 | b | 67.27 | a | 62.31 | f | 55.55 | c | 37.63 | c | 27.95 | c | 49.79 | b |
1988 | 28.45 | 35.22 | 38.97 | a | 46.97 | a | 56.69 | b | 66.92 | e | 73.61 | c | 68.18 | 60.74 | c | 57.20 | d | 38.76 | e | 28.41 | c | 50.01 | ||||
1989 | 27.55 | c | 30.93 | f | 45.53 | 53.92 | 58.34 | 66.20 | b | 72.58 | a | 68.17 | a | 63.32 | b | 51.16 | f | 41.45 | b | 33.14 | b | 53.02 | b | |||
1990 | 29.57 | a | 31.13 | a | 40.77 | 49.02 | a | 54.95 | 70.02 | 70.95 | a | 68.05 | a | 63.67 | a | 50.65 | 38.95 | a | 24.39 | c | 49.34 | |||||
1991 | 26.58 | a | 36.04 | a | 34.89 | 44.08 | 54.40 | 63.48 | 71.26 | 69.44 | 62.80 | 53.11 | 36.54 | b | 29.62 | c | 48.52 | |||||||||
1992 | 26.39 | 32.98 | a | 39.57 | d | 53.03 | a | 56.55 | a | 64.68 | 68.60 | a | 68.59 | b | 64.39 | b | 55.41 | b | 34.43 | b | 26.02 | d | 49.22 | |||
1993 | 30.11 | c | 30.90 | c | 41.36 | c | 48.09 | a | 57.68 | 65.10 | a | 70.92 | 68.11 | d | 64.10 | a | 49.59 | b | 37.31 | c | 31.50 | b | 49.56 | |||
1994 | 33.67 | a | 31.70 | 43.05 | 47.53 | a | 57.26 | 71.62 | 74.50 | b | 71.33 | b | 64.22 | c | 50.38 | c | 34.07 | c | 32.74 | 51.01 | ||||||
1995 | 29.85 | a | 41.74 | a | 40.67 | b | 44.92 | d | 52.46 | e | 62.80 | e | 73.58 | g | 74.50 | d | 65.28 | 54.50 | a | 45.54 | d | 42.17 | p | 51.23 | b | |
1996 | 33.28 | f | 38.30 | b | 40.97 | a | 50.44 | f | 61.97 | b | 70.93 | g | 75.56 | e | 72.52 | c | 60.63 | c | 51.71 | e | 40.52 | f | 32.96 | d | 54.33 | d |
1997 | 29.21 | e | 31.65 | e | 44.25 | g | 43.74 | i | 60.68 | f | 65.83 | i | 71.93 | h | 69.63 | d | 63.88 | j | 48.95 | k | 41.34 | h | 29.33 | d | 39.96 | h |
1998 | 32.83 | g | 28.79 | b | 39.47 | a | 43.04 | b | 55.63 | e | 64.69 | a | 74.89 | 73.02 | c | 63.50 | o | 50.88 | j | 40.80 | j | 31.82 | f | 54.22 | e | |
1999 | 35.93 | c | 37.71 | b | 44.45 | j | 43.21 | b | 55.59 | c | 66.73 | d | 71.11 | d | 67.82 | f | 62.75 | f | 56.75 | a | 48.00 | a | 31.50 | d | 49.62 | c |
2000 | 33.46 | e | 38.04 | c | 38.89 | d | 53.15 | c | 63.11 | d | 70.50 | e | 74.77 | 71.98 | 65.23 | b | 50.98 | a | 32.08 | d | 35.16 | b | 52.28 | |||
2001 | 28.91 | c | 33.70 | f | 41.13 | 47.57 | h | 62.68 | f | 70.31 | c | 72.03 | 71.03 | a | 69.02 | d | 56.40 | b | 43.02 | e | 28.19 | e | 53.34 | c | ||
2002 | 32.43 | d | 34.62 | b | 38.10 | e | 52.75 | b | 60.08 | e | 74.59 | b | 59.24 | f | 74.50 | h | 65.40 | f | 49.26 | h | 40.93 | g | 30.76 | j | 48.76 | f |
2003 | 38.67 | k | 34.57 | a | 40.02 | b | 45.75 | h | 62.13 | e | 69.46 | g | 77.72 | h | 71.15 | e | 65.28 | c | 57.25 | c | 37.96 | b | 32.67 | e | 50.13 | d |
2004 | 29.61 | d | 29.04 | a | 46.98 | b | 46.98 | c | 59.89 | 68.52 | 71.97 | 69.57 | a | 61.57 | a | 49.29 | b | 36.27 | b | 32.57 | b | 50.19 | ||||
2005 | 34.21 | 34.00 | a | 39.22 | a | 48.13 | 58.33 | a | 64.44 | c | 75.18 | a | 66.91 | d | 62.87 | 52.92 | e | 43.59 | c | 34.83 | b | 51.22 | ||||
2006 | 33.41 | c | 36.90 | b | 36.82 | a | 49.89 | b | 61.78 | a | 71.93 | 73.16 | 68.57 | a | 57.29 | b | 49.18 | 42.11 | c | 30.69 | d | 50.98 | ||||
2007 | 25.03 | a | 35.16 | 45.95 | 49.28 | 59.06 | d | 70.43 | a | 75.37 | 71.88 | a | 64.77 | 52.82 | c | 46.27 | b | 28.21 | c | 52.02 | ||||||
2008 | 25.11 | c | 32.07 | a | 40.18 | a | 47.27 | 53.63 | 67.23 | b | 72.45 | b | 71.40 | 63.78 | a | 53.77 | 43.65 | c | 29.43 | d | 50.00 | |||||
2009 | 32.96 | e | 35.50 | a | 41.62 | c | 46.29 | a | 60.98 | e | 63.39 | b | 75.09 | c | 72.23 | 64.50 | b | 48.38 | a | 42.65 | c | 27.13 | h | 53.05 | a | |
2010 | 28.92 | e | 30.42 | b | 38.05 | b | 47.53 | 53.79 | 68.16 | b | 72.21 | 68.26 | d | 66.72 | c | 52.71 | b | 38.52 | b | 36.41 | c | 50.14 | ||||
2011 | 29.91 | d | 28.91 | 42.27 | 48.40 | 53.73 | 67.13 | 72.44 | 72.60 | b | 65.04 | d | 52.45 | a | 38.81 | c | 29.13 | d | 50.07 | |||||||
2012 | 34.76 | b | 32.72 | 41.98 | b | 51.23 | 60.53 | 71.57 | 71.27 | a | 70.57 | a | 63.77 | 54.47 | b | 44.18 | b | 30.21 | c | 52.27 | ||||||
2013 | 26.34 | c | 29.96 | 43.71 | 47.95 | 56.65 | 70.97 | 71.69 | 68.27 | 61.67 | c | ----- | z | 39.91 | b | 27.63 | 49.52 | a | ||||||||
2014 | 35.19 | 38.09 | 43.07 | a | 48.57 | 56.47 | 68.93 | 73.94 | 67.79 | 63.93 | 55.98 | 41.48 | a | 36.33 | e | 52.48 | ||||||||||
2015 | 34.98 | f | 40.12 | 45.40 | 48.89 | b | 52.92 | 68.70 | 69.77 | 71.08 | 65.53 | 54.74 | 37.45 | 29.79 | 53.13 | a | ||||||||||
2016 | 28.90 | 38.79 | 44.74 | 46.78 | 54.45 | 72.95 | 73.18 | 67.37 | 62.62 | 55.77 | 44.80 | 33.22 | a | 51.96 | ||||||||||||
2017 | 28.60 | a | 37.89 | 46.58 | 48.72 | 56.97 | 72.60 | 72.89 | 70.29 | 63.52 | 55.23 | 47.67 | 37.87 | 53.23 | ||||||||||||
2018 | 36.79 | c | 37.45 | 42.16 | 52.40 | 60.65 | 72.89 | c | 73.61 | 72.74 | 66.50 | 52.98 | 38.83 | i | ----- | z | 56.82 | b | ||||||||
2019 | 28.82 | a | 27.80 | 38.75 | k | 53.10 | y | 51.34 | 66.95 | 74.42 | 73.97 | 65.97 | 50.32 | 42.20 | 29.47 | 51.13 | b | |||||||||
2020 | 31.56 | 34.40 | 41.40 | f | ----- | z | ----- | z | 68.18 | b | 73.21 | 75.95 | 65.82 | 56.03 | 42.03 | 29.84 | 53.00 | c | ||||||||
2021 | 31.05 | c | 32.77 | 37.68 | 50.10 | d | 54.69 | 72.43 | 73.95 | 71.32 | 67.47 | 49.61 | 46.67 | 33.50 | 51.77 | |||||||||||
2022 | 31.97 | 30.98 | 41.35 | 52.38 | f | 61.07 | a | 70.92 | 72.82 | 69.82 | 68.25 | 51.02 | 35.47 | 32.37 | 51.46 | a | ||||||||||
2023 | 26.90 | 29.14 | 33.47 | 47.98 | 57.90 | 64.05 | 77.24 | 70.97 | 64.10 | 55.03 | 42.91 | a | 35.60 | 50.44 | ||||||||||||
2024 | 30.47 | 35.86 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.16 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.16 | 33.39 | 39.33 | 47.20 | 56.66 | 67.32 | 72.42 | 70.00 | 63.68 | 52.44 | 39.77 | 31.42 | 50.22 | |||||||||||||
S.D. | 3.17 | 3.69 | 3.87 | 3.48 | 3.11 | 3.07 | 1.84 | 1.92 | 2.49 | 3.18 | 3.83 | 3.46 | 1.26 | |||||||||||||
SKEW | 0.26 | -0.00 | -0.06 | -0.25 | 0.11 | 0.32 | 0.20 | 0.54 | -0.47 | -0.25 | -0.08 | 0.10 | 0.45 | |||||||||||||
MAX | 38.87 | 41.74 | 46.98 | 53.92 | 63.11 | 74.59 | 77.24 | 75.95 | 69.02 | 58.48 | 48.00 | 39.12 | 53.23 | |||||||||||||
MIN | 22.19 | 25.09 | 30.31 | 39.76 | 49.79 | 62.05 | 68.60 | 65.71 | 57.29 | 44.70 | 32.08 | 24.39 | 47.98 | |||||||||||||
YRS | 72 | 74 | 69 | 72 | 74 | 78 | 79 | 79 | 71 | 72 | 73 | 70 | 39 |