YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1955 | 47.63 | d | 45.33 | a | 45.70 | a | 52.24 | a | 54.87 | 58.83 | 55.52 | 56.26 | 55.97 | 54.13 | 51.17 | 50.68 | 52.36 | |||||||||
1956 | 48.32 | c | 45.07 | 48.23 | 52.04 | c | ----- | z | 57.50 | b | 53.60 | k | 54.94 | 56.83 | 54.26 | 53.66 | a | 51.74 | 52.26 | b | ||||||
1957 | 48.97 | 44.35 | b | 52.19 | 53.00 | a | 56.52 | h | 58.79 | f | 59.72 | f | 56.71 | 58.23 | 57.29 | 54.63 | 51.10 | b | 52.94 | c | ||||||
1958 | 54.90 | 56.04 | 51.10 | 57.10 | 59.90 | 62.63 | 58.77 | 57.77 | 60.50 | 57.16 | 55.93 | 52.84 | 57.05 | |||||||||||||
1959 | 52.45 | 50.75 | 56.35 | 57.60 | 58.61 | m | 63.00 | l | 60.61 | 57.84 | 58.07 | 59.06 | 54.73 | d | 51.13 | 55.86 | b | |||||||||
1960 | 52.23 | 51.10 | 50.06 | 53.58 | d | 57.59 | d | 58.60 | 57.23 | 57.32 | 58.00 | 53.58 | 52.50 | 50.55 | 54.36 | |||||||||||
1961 | 51.58 | 49.75 | 52.39 | 53.27 | 52.97 | 58.73 | 57.19 | 56.65 | 55.17 | a | 51.52 | 50.47 | 49.23 | 53.24 | ||||||||||||
1962 | 49.45 | 46.96 | 47.55 | 51.93 | 52.03 | 56.50 | 57.61 | 58.06 | o | 56.41 | c | 56.35 | 52.83 | 51.33 | j | 52.76 | b | |||||||||
1963 | 48.63 | a | 52.11 | 47.23 | 50.10 | 48.77 | 54.27 | 54.71 | 57.39 | 56.97 | 55.16 | 53.07 | 53.57 | a | 52.66 | |||||||||||
1964 | 49.17 | a | 48.79 | 47.23 | 50.40 | 51.94 | 58.33 | 55.65 | 56.00 | 55.57 | 54.45 | 48.97 | 48.90 | 52.12 | ||||||||||||
1965 | 49.39 | 43.61 | 48.10 | 50.77 | 52.03 | 56.50 | 55.48 | 55.90 | 55.57 | 55.13 | 51.47 | 49.87 | 51.98 | |||||||||||||
1966 | 51.87 | 47.57 | 54.03 | 52.17 | 55.58 | 60.97 | 59.45 | 57.71 | 56.27 | 53.74 | 50.90 | 49.13 | 54.12 | |||||||||||||
1967 | 47.48 | 52.32 | 48.58 | 49.43 | 51.84 | 55.93 | 56.94 | 56.39 | 56.47 | 53.71 | 50.07 | 47.71 | 52.24 | |||||||||||||
1968 | 48.97 | 50.07 | 50.10 | 49.13 | 55.42 | 56.03 | 56.16 | 56.16 | 53.37 | 55.03 | 55.47 | 49.87 | 52.98 | |||||||||||||
1969 | 46.54 | c | 49.00 | 48.73 | a | 52.07 | 56.13 | 58.10 | 57.69 | e | 55.03 | 57.77 | 55.58 | 53.10 | 51.84 | 53.46 | ||||||||||
1970 | 49.16 | 51.64 | 51.42 | 48.10 | 52.61 | 58.23 | 55.29 | 55.94 | 55.33 | 53.97 | 49.77 | 44.45 | 52.16 | |||||||||||||
1971 | 44.00 | 49.86 | 51.42 | 47.27 | 51.77 | 56.57 | 55.90 | 54.19 | 53.13 | 54.97 | 50.23 | 46.94 | 51.35 | |||||||||||||
1972 | 44.97 | 46.83 | 50.94 | 48.07 | 50.94 | 55.87 | 55.13 | 55.16 | 54.77 | 54.10 | 53.87 | 52.23 | 51.90 | |||||||||||||
1973 | 54.19 | 51.11 | 46.16 | 54.13 | 51.87 | 60.43 | 56.48 | 56.45 | 57.00 | 54.50 | c | 49.00 | 47.29 | 53.22 | ||||||||||||
1974 | 46.90 | 46.68 | 47.14 | c | ----- | z | 50.23 | 52.80 | 53.03 | 55.42 | 53.37 | 52.00 | 48.53 | 47.53 | a | 50.33 | a | |||||||||
1975 | 43.06 | 45.95 | i | 49.71 | 50.73 | 52.94 | 56.03 | 53.39 | 54.52 | 55.20 | 53.10 | 50.67 | 46.58 | 51.45 | a | |||||||||||
1976 | 44.00 | 43.72 | 43.00 | 48.30 | 50.94 | 55.13 | 54.55 | 54.42 | 52.23 | 52.16 | ----- | z | 49.42 | 49.81 | a | |||||||||||
1977 | 52.55 | 51.33 | a | 48.74 | 49.93 | 53.15 | d | 54.70 | 56.58 | 56.42 | 55.10 | 53.58 | 53.57 | 51.94 | 53.13 | |||||||||||
1978 | 51.90 | 51.57 | 51.48 | 50.37 | 53.55 | 54.30 | 53.97 | 54.23 | 54.53 | 52.97 | 47.43 | 47.77 | 52.01 | |||||||||||||
1979 | 45.29 | c | 45.48 | g | 49.00 | 51.96 | b | 54.74 | 55.43 | 56.13 | 55.84 | 55.33 | 53.30 | a | 53.19 | d | 53.68 | 53.08 | a | |||||||
1980 | 50.86 | j | 53.48 | b | 47.00 | l | 53.50 | 53.81 | 56.93 | 56.61 | 56.87 | 55.37 | 56.13 | 55.63 | 54.29 | 55.26 | b | |||||||||
1981 | 54.06 | 51.00 | 52.48 | 52.60 | 58.03 | 58.03 | 59.06 | 56.77 | 55.60 | 54.81 | 54.37 | 53.48 | 55.03 | |||||||||||||
1982 | 49.68 | 50.00 | d | 46.55 | 52.33 | 55.39 | 56.53 | 56.32 | 54.26 | 53.63 | 56.68 | 56.07 | 54.03 | 53.46 | ||||||||||||
1983 | 56.35 | 55.39 | 56.52 | b | 51.63 | 54.90 | 56.80 | 59.06 | 58.23 | 55.50 | b | 54.32 | 56.44 | c | 51.10 | 55.52 | ||||||||||
1984 | 49.23 | a | 49.93 | 54.21 | c | 53.14 | b | 54.48 | 59.70 | 55.52 | b | 57.63 | d | 54.77 | 56.42 | 52.67 | 50.16 | 53.99 | ||||||||
1985 | 52.71 | 48.79 | 48.13 | 49.80 | 52.68 | 56.17 | 56.58 | 57.13 | 56.73 | 55.19 | 54.13 | 52.84 | 53.41 | |||||||||||||
1986 | 56.16 | 53.81 | a | 54.45 | 51.03 | 56.23 | 58.70 | 57.00 | 58.65 | 54.97 | 56.52 | 54.07 | 55.39 | 55.58 | ||||||||||||
1987 | 51.71 | ----- | z | 52.45 | 54.93 | 53.48 | 54.00 | 56.39 | 57.94 | 55.00 | 56.26 | 53.27 | 51.55 | 54.27 | a | |||||||||||
1988 | 50.97 | 49.79 | 50.32 | 51.80 | 55.48 | 58.37 | 56.45 | 56.84 | 57.16 | e | 54.16 | 51.77 | d | 48.71 | 53.49 | |||||||||||
1989 | 45.45 | 47.68 | 50.90 | 46.27 | 49.58 | 56.40 | 56.39 | 57.55 | 57.27 | 54.10 | a | 54.13 | 51.90 | 52.30 | ||||||||||||
1990 | 50.10 | 47.18 | 51.32 | 55.00 | b | 56.29 | 59.17 | 54.00 | a | 56.61 | 55.57 | 53.48 | 51.47 | 48.35 | 53.21 | |||||||||||
1991 | 51.66 | b | 51.04 | c | 47.68 | 53.10 | 55.68 | 55.00 | 58.84 | 55.03 | 56.43 | 55.45 | 55.37 | 51.35 | 53.89 | |||||||||||
1992 | 52.68 | 51.62 | 54.81 | 54.73 | 57.13 | 59.93 | 56.68 | 55.48 | 55.71 | i | 57.14 | i | 56.21 | k | 52.00 | i | 55.38 | d | ||||||||
1993 | 50.50 | m | 52.95 | h | 52.87 | h | 57.73 | h | 55.90 | k | 61.05 | h | 56.85 | k | 57.00 | k | 54.86 | h | 55.29 | j | 54.65 | j | 53.76 | j | ----- | z |
1994 | 51.85 | k | 49.63 | i | 53.13 | h | 55.86 | i | 56.62 | j | 58.14 | h | 58.55 | k | 58.57 | h | 56.15 | j | 57.15 | k | 53.45 | j | 57.00 | j | ----- | z |
1995 | 56.70 | k | 50.68 | i | 54.90 | j | 56.00 | j | 57.18 | i | 61.14 | h | 59.20 | k | 57.78 | h | 60.25 | j | 56.95 | j | 53.15 | j | 53.95 | k | ----- | z |
1996 | 50.05 | l | 49.85 | i | 50.40 | k | 56.41 | h | 59.27 | i | 56.95 | j | 57.83 | h | 58.59 | i | 58.00 | j | 56.77 | i | 53.05 | k | 52.14 | j | ----- | z |
1997 | 52.67 | j | 51.00 | j | 47.52 | j | 54.09 | h | 55.57 | j | 58.33 | i | 59.91 | i | 59.50 | m | 57.24 | i | 57.68 | i | 52.76 | m | 55.00 | j | ----- | z |
1998 | 56.85 | k | 57.32 | i | 56.18 | i | 55.73 | h | 56.65 | k | 60.95 | h | 59.18 | i | 58.05 | j | 57.67 | i | 57.33 | j | 54.30 | j | 53.32 | i | ----- | z |
1999 | 51.26 | l | 49.26 | i | 52.70 | h | 50.68 | h | 56.75 | k | 60.50 | h | 60.29 | j | 60.27 | i | 56.62 | i | 58.65 | k | 54.65 | j | 51.25 | k | ----- | z |
2000 | 48.25 | k | 53.85 | i | 53.30 | h | 55.95 | j | 58.23 | i | 58.86 | h | 58.50 | k | 58.48 | h | 57.35 | j | 54.62 | j | 52.26 | k | 54.00 | k | ----- | z |
2001 | 55.71 | j | 50.11 | i | 52.50 | i | 53.24 | i | 55.36 | i | 55.71 | i | 58.52 | j | 59.17 | h | 57.95 | k | 56.23 | i | 56.05 | j | 53.95 | l | ----- | z |
2002 | 52.29 | j | 52.29 | k | 49.67 | j | 56.59 | h | 52.91 | i | 60.55 | j | 61.23 | i | 59.68 | i | 59.20 | j | 56.59 | i | 59.84 | k | 55.43 | j | ----- | z |
2003 | 57.15 | k | 56.17 | j | 55.95 | j | 53.77 | h | 55.73 | i | 57.76 | i | 59.41 | i | 59.62 | j | 57.95 | i | 59.18 | i | 57.00 | l | 53.19 | j | ----- | z |
2004 | 51.84 | l | 54.32 | j | 50.00 | h | 52.36 | h | 55.20 | k | 58.71 | i | 58.35 | k | 59.82 | i | 57.19 | i | 52.85 | k | 53.00 | k | 52.76 | j | ----- | z |
2005 | 51.72 | m | 49.37 | i | 54.39 | h | 56.52 | i | 57.86 | j | 59.36 | h | 59.20 | k | 58.26 | h | 58.29 | i | 57.75 | k | 54.35 | j | 53.67 | j | ----- | z |
2006 | 51.70 | k | 49.63 | i | 47.70 | h | 54.10 | j | 55.45 | i | 61.95 | i | 59.75 | k | 57.78 | h | 57.85 | j | 55.05 | i | 54.15 | j | 55.65 | k | ----- | z |
2007 | 53.90 | k | 53.12 | k | 55.38 | o | 56.18 | m | 58.27 | i | 59.71 | i | 59.76 | j | 58.29 | j | 55.72 | l | 57.65 | h | 52.75 | j | 48.15 | k | ----- | z |
2008 | 49.00 | m | 48.25 | i | 52.33 | j | 51.48 | i | 55.25 | k | 57.67 | i | 56.59 | i | 58.05 | j | 58.24 | i | 57.45 | i | 52.94 | l | 52.33 | j | ----- | z |
2009 | 50.26 | l | 48.47 | i | 47.00 | i | 51.05 | h | 57.65 | k | 60.05 | h | 57.14 | i | 57.76 | j | 60.14 | i | 56.68 | i | 53.26 | k | 52.91 | i | ----- | z |
2010 | 57.00 | l | 53.89 | i | 53.22 | h | 53.64 | h | 59.70 | k | 60.33 | i | 61.25 | k | 60.32 | i | 59.14 | i | 55.33 | j | 53.00 | j | 49.86 | j | ----- | z |
2011 | 49.40 | k | 49.26 | i | 53.61 | h | 52.43 | i | 51.33 | j | 56.14 | h | 58.50 | k | 58.91 | h | 56.95 | i | 57.24 | j | 49.05 | j | 48.14 | j | ----- | z |
2012 | 51.60 | k | 50.00 | i | 50.24 | j | 52.67 | i | 54.27 | i | 56.61 | l | 58.47 | l | 57.19 | j | 56.89 | k | 57.74 | h | 53.47 | k | 52.44 | m | ----- | z |
2013 | 50.67 | j | 48.95 | i | 49.95 | j | 52.50 | h | 53.14 | i | 59.65 | j | 57.80 | k | 58.41 | i | 58.53 | k | 53.62 | j | 54.06 | l | 50.71 | j | ----- | z |
2014 | 47.90 | j | 50.53 | i | 50.76 | j | 54.19 | i | 56.21 | l | 56.57 | i | 58.82 | i | 58.21 | l | 56.76 | i | 55.95 | i | 55.82 | m | 55.30 | k | ----- | z |
2015 | 56.26 | l | 53.79 | i | 51.10 | j | 53.73 | h | 56.95 | k | 58.48 | i | 57.50 | i | 55.75 | k | 55.50 | j | 58.32 | i | 55.53 | k | 54.36 | i | ----- | z |
2016 | 56.53 | l | 56.84 | j | 56.22 | h | 58.10 | i | 57.25 | k | 57.09 | h | 57.20 | k | 57.50 | i | 56.00 | i | 57.05 | j | 55.79 | k | 50.30 | k | ----- | z |
2017 | 51.80 | k | 51.00 | i | 52.74 | h | 51.80 | j | 52.81 | j | 62.00 | h | 58.55 | k | 58.87 | h | 57.20 | j | 58.24 | j | 53.26 | k | 49.11 | l | ----- | z |
2018 | 51.62 | j | 49.26 | i | 49.48 | j | 54.24 | i | 57.09 | i | 59.52 | i | 59.24 | j | 58.00 | j | 56.89 | k | 54.77 | i | 54.72 | l | 54.71 | n | ----- | z |
2019 | 54.63 | l | 47.58 | i | 52.81 | j | 54.68 | h | 58.73 | i | 57.20 | j | 57.50 | i | 60.41 | i | 57.84 | k | 58.18 | i | 53.89 | l | 54.90 | k | ----- | z |
2020 | 51.45 | k | 51.84 | j | 50.10 | j | 54.14 | h | 58.55 | k | 61.27 | h | 61.09 | i | 59.65 | k | 57.62 | i | 56.38 | j | 55.83 | l | 53.47 | l | ----- | z |
2021 | 51.11 | l | 49.17 | j | 46.38 | j | 52.00 | i | 54.75 | k | 59.25 | j | 59.90 | k | 58.25 | k | 58.05 | j | 56.44 | m | 55.50 | l | 48.35 | k | ----- | z |
2022 | 51.15 | k | 51.32 | i | 52.70 | h | 54.09 | h | 56.05 | i | 60.82 | h | 58.59 | i | 56.19 | e | 59.00 | i | 54.95 | k | 50.75 | n | ----- | z | 56.19 | k |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 49.85 | 49.58 | 50.17 | 51.72 | 53.86 | 57.17 | 56.45 | 56.31 | 55.81 | 54.71 | 52.63 | 50.53 | 53.34 | |||||||||||||
S.D. | 3.40 | 3.08 | 3.06 | 2.53 | 2.51 | 2.15 | 1.71 | 1.21 | 1.63 | 1.59 | 2.35 | 2.50 | 1.32 | |||||||||||||
SKEW | -0.11 | -0.14 | 0.12 | 0.10 | 0.17 | 0.31 | 0.27 | -0.13 | 0.30 | 0.39 | -0.34 | -0.24 | 0.96 | |||||||||||||
MAX | 56.35 | 56.04 | 56.52 | 57.60 | 59.90 | 62.63 | 60.61 | 58.65 | 60.50 | 59.06 | 56.44 | 55.39 | 57.05 | |||||||||||||
MIN | 43.06 | 43.61 | 43.00 | 46.27 | 48.77 | 52.80 | 53.03 | 54.19 | 52.23 | 51.52 | 47.43 | 44.45 | 51.35 | |||||||||||||
YRS | 37 | 35 | 37 | 37 | 35 | 36 | 36 | 38 | 37 | 37 | 36 | 36 | 27 |