YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 72.21 | 71.29 | 64.93 | a | 63.29 | 57.47 | 52.39 | 63.60 | f | |||||
1951 | 45.40 | 46.46 | 50.27 | 53.58 | 57.85 | a | 63.00 | 73.35 | 71.94 | 70.88 | 61.00 | 52.33 | 45.23 | 57.61 | ||||||||||||
1952 | 43.97 | 47.07 | 45.29 | 53.95 | 61.47 | 59.98 | 72.44 | 74.42 | 72.20 | 64.74 | 48.13 | 46.03 | 57.47 | |||||||||||||
1953 | 51.47 | 45.23 | 48.23 | 50.52 | 53.25 | a | 62.33 | a | 75.58 | 71.77 | 68.82 | 59.83 | a | 54.80 | 47.68 | 57.46 | ||||||||||
1954 | 46.33 | a | 52.77 | 48.10 | 56.37 | 59.61 | 63.66 | a | 75.60 | 67.89 | 68.52 | 59.98 | 55.40 | a | 47.56 | 58.48 | ||||||||||
1955 | 42.94 | 45.33 | a | 50.37 | 51.28 | 55.98 | 62.22 | 69.90 | 76.63 | 69.41 | a | 61.23 | 51.48 | 48.23 | a | 57.08 | ||||||||||
1956 | 47.48 | 42.50 | 49.37 | ----- | z | 58.88 | b | 66.82 | 71.70 | a | 68.02 | a | 72.67 | 58.11 | 53.72 | 49.19 | 58.04 | a | ||||||||
1957 | 45.84 | 52.84 | 50.85 | 52.98 | a | 55.48 | a | 67.93 | 73.90 | 72.79 | 66.93 | 56.40 | 48.20 | 50.61 | 57.90 | |||||||||||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 49.55 | 45.45 | 52.56 | 58.43 | a | 57.39 | 67.00 | 77.53 | 72.82 | 66.63 | 61.98 | a | 55.92 | 50.37 | 59.64 | |||||||||||
1960 | 43.45 | 45.71 | 53.48 | a | 55.93 | 59.83 | a | 69.77 | 75.03 | 73.30 | a | 72.27 | 59.85 | 51.32 | 46.48 | 58.87 | ||||||||||
1961 | 50.10 | 49.04 | 49.69 | 55.57 | 56.18 | 69.18 | 74.52 | a | 74.65 | 65.67 | 59.58 | 50.90 | a | 47.48 | 58.55 | |||||||||||
1962 | 47.83 | a | 47.34 | 45.94 | 56.95 | 56.05 | 64.40 | 70.32 | 74.98 | 70.00 | a | 60.23 | 52.97 | 48.92 | 57.99 | |||||||||||
1963 | 43.77 | g | 54.31 | a | 47.89 | 50.33 | 58.40 | a | 62.57 | 71.52 | 73.31 | 72.28 | 62.63 | 51.73 | 48.40 | 59.40 | a | |||||||||
1964 | 44.66 | 45.17 | 46.52 | 51.07 | 56.76 | 64.40 | 74.13 | 72.77 | 66.63 | 66.12 | a | 49.93 | 47.90 | 57.17 | ||||||||||||
1965 | 48.87 | ----- | z | 48.16 | 53.30 | 56.57 | a | 59.55 | b | 71.26 | 74.02 | ----- | z | 64.52 | 54.02 | 47.17 | a | 57.74 | b | |||||||
1966 | 45.02 | a | 44.98 | 51.89 | 55.37 | 60.73 | c | 66.10 | 72.45 | 74.63 | 68.83 | 61.32 | 54.62 | ----- | z | 59.63 | a | |||||||||
1967 | 47.68 | 48.62 | 51.16 | 47.00 | 58.43 | a | 61.68 | 76.00 | 78.45 | 68.76 | a | 63.39 | 57.10 | a | 45.34 | 58.63 | ||||||||||
1968 | 46.27 | 53.36 | 50.84 | 52.98 | a | 59.18 | 65.13 | 73.42 | 69.79 | 67.42 | 60.18 | 53.76 | a | 45.37 | 58.14 | |||||||||||
1969 | 50.50 | 45.61 | 48.57 | a | 52.98 | 59.13 | a | 61.25 | 72.97 | 76.66 | 72.17 | 56.39 | 54.00 | 47.55 | 58.15 | |||||||||||
1970 | 47.37 | 50.39 | 49.88 | a | 50.05 | 60.19 | 67.37 | 76.08 | 77.39 | 66.95 | 58.90 | b | 53.72 | 46.53 | 58.74 | |||||||||||
1971 | 47.77 | 47.23 | 50.73 | 50.87 | 54.92 | 63.63 | 73.25 | a | 75.58 | 69.07 | 56.45 | 50.22 | 43.12 | a | 56.90 | |||||||||||
1972 | 46.55 | 49.43 | 55.81 | 54.57 | 60.10 | 67.63 | 75.48 | 71.52 | 66.57 | 58.06 | 49.78 | 46.18 | 58.47 | |||||||||||||
1973 | 44.23 | a | 46.84 | 45.16 | 51.22 | 60.08 | 67.71 | a | 70.98 | 71.97 | 63.58 | 59.75 | a | 49.97 | 48.24 | 56.64 | ||||||||||
1974 | 46.56 | 47.57 | 50.94 | 53.65 | 58.68 | 68.42 | 72.39 | 70.52 | 71.42 | 59.65 | 52.27 | 44.56 | 58.05 | |||||||||||||
1975 | 47.89 | 46.07 | 47.24 | 48.10 | 57.90 | 63.05 | 72.42 | 70.52 | 70.15 | 57.29 | 52.43 | 48.37 | 56.79 | |||||||||||||
1976 | 48.74 | 48.71 | 47.87 | 50.47 | a | 60.52 | 65.87 | 71.95 | 68.63 | a | 66.20 | b | 61.15 | 54.84 | a | 48.37 | 57.78 | |||||||||
1977 | 48.19 | 50.05 | 45.23 | 54.87 | 54.34 | 65.73 | 72.66 | 74.13 | 67.13 | 62.92 | 55.75 | ----- | z | 59.18 | a | |||||||||||
1978 | 48.21 | 49.04 | 52.93 | a | 51.73 | 58.11 | 66.78 | 73.45 | 71.26 | 67.23 | 64.65 | 49.48 | 43.97 | 58.07 | ||||||||||||
1979 | 43.15 | a | 46.34 | 49.35 | 53.18 | 58.74 | 67.02 | 71.55 | 69.38 | a | 73.29 | b | 60.16 | 49.98 | 49.79 | 57.66 | ||||||||||
1980 | 50.52 | c | 51.81 | 48.67 | a | 54.82 | 55.85 | 63.88 | 74.63 | 72.31 | 68.23 | 62.66 | 54.75 | 52.84 | 59.25 | |||||||||||
1981 | 50.77 | 52.23 | 50.76 | 56.97 | 60.32 | 72.23 | 74.74 | 76.42 | 70.02 | 57.82 | 55.10 | 51.48 | a | 60.74 | ||||||||||||
1982 | 47.43 | b | 51.07 | a | 50.27 | c | 55.05 | b | 59.77 | c | 61.77 | 72.05 | 74.30 | a | 68.95 | b | 58.74 | 50.41 | a | 48.75 | g | 59.07 | a | |||
1983 | 51.13 | a | 50.00 | b | 51.80 | a | 50.45 | b | 60.50 | a | 63.23 | 70.83 | a | 74.15 | 72.50 | a | 62.08 | 52.15 | 49.77 | a | 59.05 | |||||
1984 | 49.76 | 49.16 | 52.72 | a | 55.20 | 66.45 | a | 66.26 | a | 75.19 | 74.19 | 73.43 | a | 57.60 | b | 49.86 | b | 45.00 | a | 59.57 | ||||||
1985 | ----- | z | 48.20 | a | 49.54 | c | 58.38 | b | 59.45 | c | 67.83 | c | 74.97 | 71.32 | 63.17 | c | 60.76 | 50.84 | a | 50.93 | a | 59.58 | a | |||
1986 | 54.66 | c | 50.81 | b | 54.72 | b | 55.02 | 60.83 | b | 67.57 | 70.50 | a | 76.03 | 62.03 | 58.62 | a | 54.03 | 48.05 | 59.41 | |||||||
1987 | 46.15 | a | 48.66 | c | 50.10 | a | 59.57 | c | 62.72 | a | 67.83 | 68.07 | a | 71.88 | a | 68.18 | 64.02 | b | 52.02 | a | 44.03 | b | 58.60 | |||
1988 | 48.53 | b | 52.30 | b | 52.05 | a | 55.85 | c | 60.62 | b | 65.48 | c | 73.45 | a | 71.79 | 67.29 | a | 65.34 | 53.12 | b | 46.26 | 59.34 | ||||
1989 | 45.59 | b | 48.24 | c | 54.47 | b | 59.98 | 60.30 | c | 65.79 | a | 73.69 | 69.52 | a | 68.84 | a | 60.93 | a | 54.37 | 49.89 | 59.30 | |||||
1990 | 47.69 | b | 46.17 | b | 51.95 | 57.89 | b | 57.98 | b | 69.63 | d | 74.28 | a | 70.48 | 69.03 | 63.41 | b | 52.95 | 45.10 | b | 58.88 | |||||
1991 | 47.48 | a | 52.77 | 47.24 | 54.30 | 56.63 | 61.09 | a | 69.35 | a | 71.81 | 70.10 | 64.43 | a | 54.42 | 46.73 | c | 58.03 | ||||||||
1992 | 46.45 | j | 52.36 | d | 51.32 | 59.15 | 64.68 | 65.92 | f | 71.40 | e | 75.88 | a | 69.47 | 60.19 | d | 50.91 | c | 43.89 | c | 59.92 | b | ||||
1993 | 47.69 | g | 47.65 | e | 53.50 | v | 57.26 | a | 59.29 | x | 67.29 | a | 66.47 | a | 70.16 | f | 68.69 | c | 62.17 | a | 52.87 | c | 47.80 | a | 58.77 | d |
1994 | 50.50 | 47.70 | 53.65 | 55.22 | a | 58.90 | b | 70.28 | 72.00 | 75.61 | 69.32 | 58.79 | 48.07 | 48.17 | a | 59.02 | ||||||||||
1995 | ----- | z | 55.09 | 52.44 | 53.50 | 57.58 | 65.00 | 73.34 | 77.08 | a | 72.07 | 62.92 | 58.65 | 50.10 | 61.61 | a | ||||||||||
1996 | 49.58 | 51.93 | 52.26 | 58.24 | a | 61.37 | 65.77 | 75.23 | 75.23 | 68.52 | 59.74 | 54.97 | 49.34 | 60.18 | ||||||||||||
1997 | 48.45 | 47.30 | 54.35 | 55.91 | a | 66.74 | ----- | z | ----- | z | 75.34 | b | 72.65 | c | 58.89 | d | 53.62 | 46.15 | a | 57.94 | b | |||||
1998 | 48.98 | a | 45.52 | 50.53 | b | 52.58 | f | 55.11 | 61.37 | 73.55 | 77.65 | a | 66.50 | c | 57.95 | 52.04 | b | 46.60 | 57.80 | a | ||||||
1999 | 48.66 | 49.06 | a | 48.62 | a | 50.19 | a | 58.90 | b | 65.42 | 71.60 | a | 71.00 | b | 68.20 | 62.66 | c | 54.93 | b | 48.33 | d | 58.13 | ||||
2000 | 51.29 | 49.93 | b | 50.97 | b | 57.21 | d | 63.22 | b | 68.38 | b | 71.25 | c | 74.13 | 67.97 | 57.92 | 47.50 | a | 51.04 | c | 59.23 | |||||
2001 | 45.52 | b | 46.46 | a | 51.22 | d | 52.48 | c | 65.18 | a | 69.40 | a | 70.06 | 75.27 | a | 70.62 | b | 62.92 | a | 54.64 | b | 46.38 | c | 59.18 | ||
2002 | 46.83 | a | 49.62 | c | 49.58 | a | 53.88 | a | 58.53 | a | 66.75 | b | 73.92 | 71.75 | a | 71.64 | a | 57.55 | b | 54.02 | b | 46.10 | a | 58.35 | ||
2003 | 53.62 | c | 48.98 | a | 52.02 | 50.67 | a | 60.75 | a | 65.07 | b | 76.29 | 76.97 | a | 72.97 | 67.02 | b | 52.22 | 47.79 | 60.36 | ||||||
2004 | 47.48 | a | 46.52 | 57.70 | a | 55.72 | 61.24 | 64.63 | 73.06 | 72.42 | 68.38 | 58.11 | 48.22 | 47.98 | 58.46 | |||||||||||
2005 | 48.21 | 48.86 | 51.98 | 54.62 | 62.24 | 64.09 | a | 75.50 | 75.40 | 65.65 | 60.53 | a | 54.93 | 49.97 | 59.33 | |||||||||||
2006 | 48.37 | 50.80 | ----- | z | 53.78 | 63.08 | 71.00 | 79.55 | a | 72.97 | 69.83 | 58.68 | 55.83 | 48.37 | 61.12 | a | ||||||||||
2007 | 43.50 | 50.04 | 54.76 | 56.37 | 60.52 | 66.65 | 75.06 | ----- | z | ----- | z | 60.57 | a | 56.05 | 45.88 | b | 56.94 | b | ||||||||
2008 | 46.34 | 48.59 | 50.59 | b | 53.87 | 57.56 | 68.63 | 74.71 | 75.05 | 71.55 | 63.59 | b | 57.95 | 47.82 | 59.69 | |||||||||||
2009 | 52.52 | 48.14 | 50.52 | 53.58 | 63.56 | 64.85 | 75.24 | 72.45 | 71.73 | 58.82 | 54.28 | 46.10 | 59.32 | |||||||||||||
2010 | 49.08 | 47.93 | 49.90 | 51.78 | 56.40 | 63.70 | 71.15 | 71.82 | 68.82 | 59.68 | 50.10 | a | 50.35 | 57.56 | ||||||||||||
2011 | 49.03 | 45.54 | 51.11 | 55.73 | 57.05 | 63.12 | 71.66 | 73.98 | 71.17 | 61.95 | 51.27 | 45.26 | 58.07 | |||||||||||||
2012 | 50.27 | 48.00 | 50.63 | a | 55.92 | 60.85 | a | 64.92 | 72.15 | 77.68 | 73.47 | 62.03 | 54.73 | 46.84 | 59.79 | |||||||||||
2013 | 46.35 | 45.57 | 53.94 | 55.48 | 61.02 | 67.28 | 75.23 | 73.63 | 70.23 | 57.69 | 53.37 | 49.47 | 59.11 | |||||||||||||
2014 | 54.37 | 52.25 | 54.13 | 57.65 | 63.08 | 66.43 | 74.47 | 72.66 | 72.10 | 63.98 | 55.23 | 49.82 | 61.35 | |||||||||||||
2015 | 51.10 | 54.55 | 55.76 | 56.20 | 58.05 | 70.27 | 70.65 | 74.76 | 72.17 | 65.53 | 52.60 | 47.48 | 60.76 | |||||||||||||
2016 | 48.08 | 54.95 | a | 53.48 | 56.47 | 59.50 | 71.85 | 75.29 | 74.74 | 67.52 | 63.00 | 55.92 | 50.85 | 60.97 | ||||||||||||
2017 | 47.69 | 50.27 | 56.16 | 56.87 | 61.18 | a | 69.80 | 77.61 | 75.11 | 67.28 | 64.02 | 58.30 | 53.60 | 61.49 | ||||||||||||
2018 | 54.90 | 49.04 | 52.90 | 57.42 | 60.73 | 67.43 | 78.26 | 75.97 | 71.13 | 61.52 | 54.60 | 49.08 | 61.08 | |||||||||||||
2019 | 49.47 | 44.20 | 50.65 | 56.92 | 56.16 | 66.52 | 72.40 | 74.10 | 68.68 | 60.10 | 54.72 | 48.55 | 58.54 | |||||||||||||
2020 | 48.68 | 50.45 | 50.11 | 56.45 | 63.48 | 65.00 | 71.73 | 77.19 | 73.15 | 64.55 | 54.32 | 49.55 | 60.39 | |||||||||||||
2021 | 49.18 | a | 50.79 | 49.38 | a | 57.03 | a | 60.85 | 72.35 | 78.44 | 76.40 | a | 72.18 | 58.33 | a | 59.38 | 49.31 | 61.14 | ||||||||
2022 | 51.56 | 48.71 | 53.13 | 57.18 | 61.48 | 71.17 | 74.98 | 78.85 | 73.42 | 62.58 | 50.15 | 48.05 | 60.94 | |||||||||||||
2023 | 47.44 | 45.29 | 47.84 | 55.12 | 59.65 | 62.05 | 76.47 | 74.87 | 68.45 | 64.13 | 53.02 | 51.11 | 58.78 | |||||||||||||
2024 | 47.74 | 48.90 | 49.26 | 54.22 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.63 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 48.24 | 48.83 | 50.84 | 54.55 | 59.50 | 65.99 | 73.40 | 73.68 | 69.35 | 61.02 | 53.15 | 47.98 | 58.89 | |||||||||||||
S.D. | 2.67 | 2.79 | 2.67 | 2.78 | 2.77 | 3.01 | 2.42 | 2.53 | 2.63 | 2.59 | 2.66 | 2.23 | 1.22 | |||||||||||||
SKEW | 0.32 | 0.29 | 0.07 | -0.43 | 0.28 | 0.06 | -0.01 | -0.20 | -0.39 | 0.18 | -0.05 | 0.13 | 0.36 | |||||||||||||
MAX | 54.90 | 55.09 | 57.70 | 59.98 | 66.74 | 72.35 | 79.55 | 78.85 | 73.47 | 67.02 | 59.38 | 53.60 | 61.49 | |||||||||||||
MIN | 42.94 | 42.50 | 45.16 | 47.00 | 53.25 | 59.55 | 66.47 | 67.89 | 62.03 | 56.39 | 47.50 | 43.12 | 56.64 | |||||||||||||
YRS | 68 | 72 | 71 | 70 | 71 | 70 | 72 | 71 | 71 | 73 | 73 | 70 | 58 |