YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.95 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.29 | a | 49.30 | c | 51.80 | j |
1956 | 47.11 | 47.74 | 53.50 | 57.05 | 62.03 | 69.78 | 70.42 | a | 70.94 | 68.82 | 62.00 | a | 58.14 | a | 50.18 | a | 59.81 | |||||||||
1957 | 44.30 | a | 51.54 | a | 53.47 | 58.48 | 60.47 | 72.52 | 72.48 | a | 71.16 | 69.68 | 60.73 | 54.10 | 46.59 | b | 59.63 | |||||||||
1958 | 48.10 | b | 52.79 | 49.95 | 58.00 | 64.53 | 68.18 | 70.02 | 73.53 | 73.45 | 66.19 | 57.20 | 54.92 | 61.41 | ||||||||||||
1959 | 49.85 | 49.81 | a | 57.98 | 62.67 | 62.37 | 72.43 | a | 74.95 | 71.77 | a | 69.18 | 67.82 | 57.87 | 50.71 | 62.29 | ||||||||||
1960 | 46.16 | 50.71 | 54.39 | 56.97 | 61.50 | 72.17 | 72.97 | 71.00 | 68.60 | a | 62.76 | 52.64 | a | 48.47 | a | 59.86 | ||||||||||
1961 | 46.73 | a | 52.52 | a | 51.75 | a | 60.12 | a | 59.47 | 72.27 | 76.22 | a | 72.40 | 68.70 | 64.15 | 53.78 | 47.10 | 60.43 | ||||||||
1962 | 48.97 | b | 48.89 | 50.53 | a | 61.48 | 61.60 | 68.40 | 69.76 | 71.13 | a | 67.67 | 61.77 | 56.60 | a | 48.96 | c | 59.65 | ||||||||
1963 | 45.94 | g | 56.62 | c | 51.39 | 51.26 | k | 60.68 | f | 65.76 | c | 69.91 | c | 71.17 | a | 70.34 | a | 60.28 | a | 51.50 | 43.60 | 60.06 | c | |||
1964 | 45.66 | 51.22 | 51.73 | 55.73 | 58.82 | 66.82 | 72.03 | 72.71 | 67.62 | 66.06 | 50.82 | 49.32 | a | 59.05 | ||||||||||||
1965 | 47.35 | 50.57 | 53.77 | 55.68 | 62.26 | 63.93 | 69.18 | 71.81 | 64.20 | 67.19 | 53.63 | 44.02 | 58.63 | |||||||||||||
1966 | 46.61 | 47.21 | 51.03 | 61.57 | 62.77 | 69.52 | 69.53 | 71.56 | 69.00 | 64.08 | 54.18 | 46.92 | 59.50 | |||||||||||||
1967 | 48.03 | 51.39 | 48.98 | 46.83 | 62.21 | 65.12 | 73.19 | 73.05 | 71.17 | 66.32 | 58.87 | 46.63 | 59.32 | |||||||||||||
1968 | 44.94 | 53.79 | 54.87 | 59.40 | 61.31 | 69.62 | 71.27 | 69.82 | 70.15 | 62.37 | 52.90 | 44.40 | 59.57 | |||||||||||||
1969 | 43.60 | 45.23 | 52.08 | 55.63 | 63.92 | 65.75 | 71.84 | 74.00 | 70.33 | 61.15 | 55.80 | 51.23 | 59.21 | |||||||||||||
1970 | 49.31 | 52.48 | 54.73 | 55.23 | 64.92 | 67.78 | 71.74 | 69.75 | a | 71.10 | 60.35 | 54.88 | 45.21 | 59.79 | ||||||||||||
1971 | 47.55 | 50.14 | 51.00 | 54.02 | ----- | z | 67.38 | 72.05 | 72.97 | 70.48 | 60.19 | 54.37 | 43.77 | 58.54 | a | |||||||||||
1972 | 44.77 | 50.22 | 56.13 | 55.50 | 62.48 | 67.13 | 72.23 | 71.63 | 65.97 | 60.00 | 51.52 | 42.31 | 58.32 | |||||||||||||
1973 | 45.23 | 50.93 | 49.66 | 59.73 | 65.73 | 71.80 | 72.18 | 69.15 | 67.57 | 62.29 | 51.68 | 47.89 | 59.49 | |||||||||||||
1974 | 46.56 | 48.11 | 51.95 | 55.15 | 62.16 | 68.55 | 71.68 | 71.03 | 69.17 | 64.97 | 52.43 | 46.68 | 59.04 | |||||||||||||
1975 | 46.71 | 47.84 | 50.37 | 51.30 | 64.97 | 68.37 | 70.79 | 70.13 | 68.38 | 58.82 | 50.85 | 48.48 | 58.08 | |||||||||||||
1976 | 47.98 | 49.12 | 50.34 | 53.28 | 65.45 | 69.64 | a | 72.42 | 68.44 | 67.97 | 64.08 | 56.95 | 48.95 | 59.55 | ||||||||||||
1977 | 44.92 | 53.38 | 50.29 | 58.63 | 56.24 | 70.27 | 72.53 | 72.37 | 66.90 | 62.52 | 53.93 | 50.44 | 59.37 | |||||||||||||
1978 | 50.23 | 51.34 | 56.89 | 54.85 | 64.73 | 68.55 | 72.06 | 72.31 | 69.40 | 65.71 | 52.52 | 44.73 | 60.28 | |||||||||||||
1979 | 45.65 | 47.55 | 53.15 | a | 56.88 | 64.77 | 69.88 | 72.15 | 70.95 | 71.10 | 62.73 | 51.38 | 49.71 | 59.66 | ||||||||||||
1980 | 49.27 | 52.89 | b | 53.73 | a | 57.65 | 62.29 | 65.70 | 72.37 | 69.50 | 68.77 | 66.41 | b | 57.93 | i | 50.28 | b | 60.81 | a | |||||||
1981 | 48.74 | 53.14 | 53.60 | a | 59.87 | 64.57 | a | 74.10 | 71.36 | b | 72.92 | 68.50 | 60.08 | 56.27 | 50.91 | c | 61.17 | |||||||||
1982 | 45.23 | c | 51.27 | f | 50.85 | d | 55.10 | a | 63.48 | f | 65.21 | b | 71.52 | a | 71.54 | c | 69.47 | 62.40 | b | 51.46 | d | 47.76 | 59.05 | b | ||
1983 | 47.94 | d | 51.50 | e | 51.57 | d | 53.60 | a | 63.73 | a | ----- | z | ----- | z | 73.66 | 72.92 | 66.13 | d | 52.74 | e | 49.57 | c | 58.34 | b | ||
1984 | 50.75 | c | 51.07 | g | 57.16 | c | 56.55 | a | 65.07 | a | 69.84 | b | 75.31 | b | 72.97 | 73.89 | k | 58.72 | b | 51.19 | a | 46.00 | a | 60.36 | b | |
1985 | 45.07 | b | 52.89 | 50.28 | a | 61.63 | 63.05 | a | 71.57 | a | 73.32 | 68.31 | b | 65.76 | a | 61.23 | a | 50.43 | c | 45.52 | d | 59.09 | ||||
1986 | 50.74 | b | 54.56 | a | 58.13 | a | 58.82 | 63.10 | a | 70.38 | a | 71.34 | 71.00 | b | 63.98 | a | 63.84 | 57.60 | 48.85 | 61.03 | ||||||
1987 | 47.02 | 51.45 | 53.29 | 63.28 | 67.84 | 70.73 | 70.77 | ----- | z | 70.40 | 66.69 | 53.82 | 47.59 | b | 60.26 | a | ||||||||||
1988 | 48.15 | 54.88 | 58.10 | 59.20 | 61.35 | a | 68.40 | 75.40 | 73.53 | 70.55 | a | 65.06 | 54.20 | 49.31 | 61.51 | |||||||||||
1989 | 47.85 | 47.77 | 53.93 | a | 62.60 | 64.27 | ----- | z | 74.03 | 72.94 | 67.17 | 61.25 | a | 56.10 | 48.40 | b | 59.66 | a | ||||||||
1990 | 48.24 | 48.59 | 55.29 | 62.67 | g | 62.98 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.37 | 43.13 | a | 52.10 | f | |||||
1991 | 49.42 | a | 55.86 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.64 | j | |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.37 | 73.88 | b | 68.13 | a | 53.75 | h | 44.67 | g | 74.13 | i | |
1993 | 46.78 | f | 48.64 | g | 58.92 | e | 59.50 | f | 65.74 | l | 76.15 | g | 77.22 | k | 78.70 | k | 74.34 | h | 67.02 | h | 53.81 | i | 46.55 | l | 58.92 | k |
1994 | 48.88 | b | 48.23 | f | 57.75 | g | 62.00 | i | 67.15 | g | 76.04 | g | 78.25 | m | 78.30 | h | 71.35 | j | 63.18 | i | 45.92 | j | 43.64 | f | 48.88 | k |
1995 | 48.91 | h | 54.59 | k | 53.46 | h | 56.61 | k | 65.21 | c | 73.88 | j | 79.18 | f | 78.94 | g | 73.21 | i | 67.02 | g | 58.98 | g | 48.88 | g | 65.21 | k |
1996 | 49.09 | i | 51.98 | e | 55.75 | g | 62.15 | j | 67.07 | i | 76.36 | e | 81.18 | i | 78.81 | d | 70.32 | e | 64.75 | e | 54.32 | h | 49.76 | f | 68.44 | g |
1997 | 49.28 | f | 52.24 | i | 58.02 | i | 61.93 | g | 72.82 | i | 75.82 | h | 77.71 | c | 75.33 | e | 73.80 | b | 63.46 | f | 55.38 | a | 46.19 | b | 65.68 | g |
1998 | 49.66 | c | 48.91 | f | 54.43 | b | ----- | z | 59.10 | a | 67.96 | d | 75.22 | d | 76.96 | e | 71.92 | d | 62.02 | f | 51.93 | c | 47.14 | c | 61.59 | c |
1999 | 48.02 | e | 48.62 | d | 50.41 | b | 58.48 | e | 63.12 | e | 71.25 | d | 73.55 | j | 74.11 | i | ----- | z | 65.52 | e | 55.50 | c | 50.17 | a | 56.79 | c |
2000 | 49.32 | a | 51.30 | b | 55.81 | d | 62.15 | d | 67.08 | e | 71.33 | c | 72.26 | b | ----- | z | 71.40 | d | 61.75 | c | ----- | z | 49.47 | b | 61.19 | b |
2001 | 46.41 | b | 49.60 | c | 58.06 | d | 57.81 | f | 73.06 | e | 74.59 | g | 72.56 | d | 74.26 | j | 70.05 | j | 66.50 | j | 55.12 | d | 48.12 | b | 57.56 | e |
2002 | 47.07 | c | 52.63 | a | 53.48 | e | 59.18 | k | 63.33 | g | 71.80 | h | 74.85 | g | 72.52 | d | 71.31 | i | 64.37 | d | 55.81 | c | 49.50 | b | 56.48 | e |
2003 | 53.79 | c | 52.33 | h | 56.04 | f | 52.10 | f | 64.94 | g | 70.83 | g | 75.62 | k | 73.26 | n | 72.80 | g | 68.09 | c | 50.22 | c | 47.70 | h | 57.37 | i |
2004 | 49.02 | c | 50.34 | a | 61.72 | b | 61.07 | a | 66.36 | c | 71.87 | c | 73.61 | h | 75.04 | f | 74.18 | e | 61.71 | e | 53.92 | d | 50.29 | e | 60.05 | b |
2005 | 47.31 | d | 53.62 | b | 57.05 | a | 56.08 | d | 63.52 | a | 66.38 | b | 75.79 | 71.35 | 68.48 | d | 65.04 | g | 55.79 | b | 50.23 | c | 60.51 | a | ||
2006 | 49.97 | b | 51.74 | c | 48.02 | b | 56.29 | d | 66.15 | h | 73.89 | g | 77.34 | f | 71.84 | f | 71.85 | m | 62.48 | g | 54.67 | c | 48.18 | f | 52.14 | g |
2007 | 47.16 | f | 51.32 | i | 60.31 | b | 60.48 | e | 64.80 | d | 70.91 | a | 74.98 | f | 75.60 | j | 68.91 | h | 60.07 | h | 55.61 | h | 47.06 | d | 60.71 | g |
2008 | 45.98 | b | 51.50 | c | 55.08 | a | 58.26 | c | 65.82 | c | 71.71 | d | 74.63 | e | 75.44 | d | 70.88 | e | 65.54 | e | 57.98 | i | 45.48 | b | 61.85 | a |
2009 | 52.12 | a | 50.02 | d | 54.28 | d | 59.16 | e | 66.12 | e | 69.32 | e | 73.46 | g | 73.91 | d | 73.52 | g | 63.06 | f | 54.76 | i | 46.17 | g | 60.70 | e |
2010 | 48.22 | m | ----- | z | 53.44 | d | 55.20 | g | 60.15 | e | 72.28 | 71.92 | e | 70.96 | f | 73.17 | g | 64.94 | g | 54.28 | e | 50.46 | f | 62.42 | g | |
2011 | 50.85 | 48.21 | d | 52.48 | b | 57.57 | c | 61.97 | 68.46 | b | 73.50 | 72.74 | d | 73.78 | e | 65.29 | e | 52.28 | g | 48.54 | f | 62.49 | b | |||
2012 | 50.35 | e | 53.28 | d | 51.88 | e | 58.48 | e | 67.02 | d | 69.64 | e | 73.83 | a | 73.78 | a | 68.93 | 65.81 | 56.31 | a | 47.97 | 61.44 | ||||
2013 | 47.81 | 51.89 | 56.76 | 62.13 | 65.71 | 72.33 | 73.38 | a | 73.37 | 70.20 | 62.98 | 56.92 | 49.60 | 61.92 | ||||||||||||
2014 | 54.80 | d | 53.73 | 58.63 | 62.16 | a | 68.60 | 72.23 | 73.84 | 73.77 | 71.09 | b | 69.82 | 57.88 | 52.34 | 64.07 | ||||||||||
2015 | 53.74 | 56.86 | 62.16 | 61.45 | 63.74 | 74.22 | 75.31 | 74.77 | 72.50 | a | 69.58 | a | 54.12 | 47.77 | 63.85 | |||||||||||
2016 | 49.26 | 56.62 | 56.37 | 62.88 | a | 65.92 | 72.82 | 74.53 | ----- | z | ----- | z | 63.39 | 56.48 | 47.55 | 60.58 | b | |||||||||
2017 | 47.32 | 51.57 | 58.08 | 58.52 | 67.29 | 74.08 | 77.39 | c | 75.78 | d | 74.59 | a | 68.50 | k | 54.77 | 49.96 | c | 62.67 | a | |||||||
2018 | 51.16 | f | 54.00 | h | 52.54 | g | 61.36 | l | 67.17 | g | 73.75 | b | 75.91 | c | 74.11 | l | 71.94 | l | 63.63 | 56.13 | d | ----- | z | 67.36 | h | |
2019 | 51.15 | e | 46.43 | 53.39 | 62.07 | 61.32 | 71.48 | d | 72.21 | 74.43 | a | 69.23 | b | 62.04 | c | 55.73 | 48.34 | 60.65 | ||||||||
2020 | 48.84 | 54.05 | 50.61 | d | 59.10 | a | 63.66 | 69.73 | 71.97 | a | 74.74 | 71.72 | 68.68 | 52.38 | 48.90 | a | 61.20 | |||||||||
2021 | 49.31 | 51.38 | 51.03 | 58.43 | 64.84 | 70.58 | 73.05 | a | 72.53 | 70.63 | 60.53 | 55.73 | 45.97 | b | 60.33 | |||||||||||
2022 | 49.39 | 51.64 | 55.97 | 55.98 | 62.47 | 70.18 | 71.60 | 73.85 | 71.92 | 62.87 | 48.53 | 45.69 | 60.01 | |||||||||||||
2023 | 48.18 | 45.82 | 47.50 | 55.80 | 61.63 | 64.93 | 74.19 | 74.45 | 67.88 | 62.97 | a | 54.93 | 50.71 | 59.08 | ||||||||||||
2024 | 50.39 | 51.12 | 52.02 | 58.72 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.17 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 48.23 | 51.20 | 53.83 | 58.10 | 63.66 | 69.84 | 72.83 | 72.69 | 69.84 | 63.77 | 54.27 | 48.00 | 60.21 | |||||||||||||
S.D. | 2.33 | 2.66 | 3.32 | 3.26 | 2.74 | 2.72 | 1.96 | 2.33 | 2.40 | 2.76 | 2.30 | 2.45 | 1.38 | |||||||||||||
SKEW | 0.49 | -0.03 | 0.46 | -0.73 | 0.35 | -0.12 | 0.47 | 0.81 | -0.15 | 0.26 | -0.22 | -0.11 | 1.12 | |||||||||||||
MAX | 54.80 | 56.86 | 62.16 | 63.28 | 73.06 | 76.36 | 77.71 | 80.37 | 74.59 | 69.82 | 58.87 | 54.92 | 64.07 | |||||||||||||
MIN | 43.60 | 45.23 | 47.50 | 46.83 | 56.24 | 63.93 | 69.18 | 68.31 | 63.98 | 58.72 | 48.53 | 42.31 | 58.08 | |||||||||||||
YRS | 60 | 57 | 61 | 53 | 55 | 55 | 53 | 52 | 52 | 54 | 57 | 57 | 35 |