YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.55 | c | 46.63 | 39.91 | b | 46.70 | i | |
1990 | 42.58 | 40.95 | 48.87 | 54.38 | 55.71 | 61.88 | 70.19 | 69.48 | 64.76 | a | 52.39 | 45.30 | 35.55 | c | 53.50 | |||||||||||
1991 | 37.15 | a | 48.64 | 44.29 | 49.17 | 52.50 | a | 59.07 | 69.56 | 68.66 | 65.33 | 55.31 | 48.19 | a | 41.21 | 53.26 | ||||||||||
1992 | 43.06 | 47.83 | 50.60 | a | 53.62 | b | ----- | z | 65.93 | 68.50 | 67.46 | h | 62.27 | 55.69 | 46.19 | a | 39.40 | a | 53.31 | b | ||||||
1993 | 36.38 | a | 37.65 | b | 50.89 | h | 51.17 | 58.85 | 61.08 | 64.02 | 66.85 | 64.67 | 57.13 | a | 40.71 | a | 40.42 | 52.63 | a | |||||||
1994 | 43.37 | 42.22 | c | 48.83 | b | 52.84 | a | 59.00 | a | 60.75 | 70.50 | 67.35 | 65.70 | 53.56 | 42.07 | a | 43.29 | 54.12 | ||||||||
1995 | 43.63 | a | 49.39 | 47.60 | a | 50.32 | 58.10 | 62.03 | 69.43 | a | 66.13 | a | 66.55 | a | 54.45 | 51.02 | 45.53 | 55.35 | ||||||||
1996 | 43.42 | 45.26 | 48.53 | a | 52.35 | 55.08 | 62.74 | a | 72.58 | a | 70.16 | 61.28 | a | 55.15 | a | 48.12 | 43.37 | a | 54.84 | |||||||
1997 | 42.32 | 44.73 | 48.68 | 51.58 | 62.43 | c | 62.98 | b | 68.43 | b | 69.84 | c | 63.65 | 53.30 | a | 48.58 | 40.22 | a | 54.73 | |||||||
1998 | 44.97 | a | 45.67 | b | 47.42 | 49.83 | c | 54.36 | b | 62.27 | 70.45 | 69.66 | 65.37 | 53.97 | a | 47.50 | a | 38.84 | 54.19 | |||||||
1999 | 42.47 | 43.59 | a | 45.14 | c | 49.66 | a | 53.36 | c | 60.40 | e | 66.82 | f | 68.00 | a | 62.17 | g | 55.43 | b | 51.33 | f | 41.52 | c | 51.06 | c | |
2000 | 41.65 | 46.69 | 45.58 | 53.23 | 57.37 | a | 65.45 | 67.28 | a | 67.88 | a | 63.48 | a | 55.46 | c | 42.54 | b | 42.16 | b | 54.06 | ||||||
2001 | 41.35 | 41.72 | a | 47.42 | a | 49.00 | c | 57.67 | j | 60.48 | f | 67.09 | h | 68.33 | e | 63.59 | h | 52.89 | h | 48.59 | c | 42.32 | c | 48.39 | e | |
2002 | 42.86 | c | 44.92 | c | 44.48 | b | 51.43 | c | 54.90 | a | 63.50 | b | 70.66 | i | 68.15 | d | 64.12 | b | 51.88 | b | 45.84 | b | 44.31 | 52.40 | a | |
2003 | 45.59 | b | 43.96 | a | 49.17 | b | 48.98 | a | 56.32 | a | 65.42 | 71.63 | 70.53 | a | 65.92 | 58.10 | a | 44.85 | d | 43.88 | a | 55.36 | ||||
2004 | 43.82 | 44.61 | b | 51.00 | a | 53.55 | 58.82 | c | 63.83 | 70.87 | 70.92 | a | 62.67 | 55.31 | b | 45.98 | c | 43.48 | a | 55.41 | ||||||
2005 | 42.00 | 44.37 | a | 50.87 | a | 50.91 | b | 58.84 | b | 61.73 | b | 70.20 | c | 71.57 | c | 62.07 | 56.10 | b | 45.21 | b | 41.79 | 54.64 | ||||
2006 | 44.00 | a | 42.57 | e | 44.88 | c | 52.17 | a | 58.81 | e | 65.20 | c | 71.81 | b | 68.92 | e | 64.62 | a | 54.18 | a | 47.30 | 41.44 | g | 55.86 | a | |
2007 | 38.11 | 44.30 | 50.55 | b | 51.78 | a | 58.22 | b | 63.04 | c | 70.83 | b | 68.05 | c | 62.38 | 52.89 | 44.13 | 41.84 | 53.84 | |||||||
2008 | 37.72 | a | 43.17 | 44.66 | b | 47.68 | 58.00 | 61.07 | a | 70.85 | a | 70.02 | 64.02 | 54.10 | 49.42 | 39.40 | 53.34 | |||||||||
2009 | 40.05 | 43.45 | 44.65 | 49.95 | 59.05 | 65.35 | 73.06 | 70.19 | 65.22 | 52.98 | 45.28 | 37.32 | 53.88 | |||||||||||||
2010 | 47.40 | 47.16 | 46.95 | 49.37 | 54.45 | 61.57 | 70.03 | 69.10 | 64.35 | 55.55 | 46.87 | 43.79 | 54.72 | |||||||||||||
2011 | 43.05 | 41.21 | 47.03 | 47.92 | 53.89 | 61.52 | 66.16 | 69.48 | 67.38 | 55.13 | 45.93 | 38.48 | 53.10 | |||||||||||||
2012 | 41.71 | 43.28 | 45.03 | 52.90 | 56.45 | 60.53 | 67.69 | 70.76 | 65.30 | 55.52 | 49.12 | 42.18 | 54.21 | |||||||||||||
2013 | 38.31 | 43.68 | 48.65 | 53.33 | 59.53 | 65.57 | 73.00 | 69.73 | 63.98 | 52.37 | 45.35 | 35.37 | a | 54.07 | ||||||||||||
2014 | 41.32 | 45.88 | 49.98 | 52.70 | 60.68 | 64.45 | 72.45 | 72.26 | 66.93 | 59.85 | 47.75 | 45.95 | 56.68 | |||||||||||||
2015 | 43.88 | a | 48.23 | 52.07 | b | 51.87 | 59.97 | 69.64 | a | 74.38 | a | 71.55 | 63.37 | 60.18 | 45.58 | 43.94 | 57.05 | |||||||||
2016 | 42.32 | 47.17 | 49.45 | 56.70 | 60.61 | 65.15 | 69.58 | 72.65 | a | 63.15 | 56.18 | 51.53 | 39.03 | 56.13 | ||||||||||||
2017 | 38.24 | 45.19 | b | 48.06 | 50.23 | 59.19 | 64.97 | 71.84 | 74.19 | 65.62 | a | 53.58 | 47.45 | a | 39.27 | a | 54.82 | |||||||||
2018 | 44.85 | 42.79 | 46.44 | 53.03 | 62.40 | 65.83 | c | 73.90 | a | 70.85 | d | 62.62 | 56.93 | a | 47.38 | a | 42.52 | b | 55.80 | |||||||
2019 | 42.65 | a | 39.83 | a | 45.71 | 54.62 | a | 59.27 | 66.30 | b | 70.12 | a | 71.82 | 64.95 | 50.84 | 45.90 | 43.31 | 54.61 | ||||||||
2020 | 45.53 | 44.73 | a | 47.27 | 54.65 | 59.18 | a | 65.20 | 71.00 | a | 73.66 | b | 66.66 | a | 57.29 | 46.10 | 42.73 | 56.17 | ||||||||
2021 | 44.21 | 43.88 | 46.48 | 53.05 | 59.50 | 69.18 | 74.56 | 72.85 | 65.62 | 54.06 | 49.09 | b | 43.27 | 56.31 | ||||||||||||
2022 | 43.08 | 42.71 | b | 50.18 | a | 47.75 | 54.87 | 64.05 | 72.39 | 73.66 | b | 68.50 | b | 60.00 | a | 42.80 | 41.48 | 55.12 | ||||||||
2023 | 42.05 | 39.59 | 42.37 | 49.30 | 61.22 | a | 65.88 | 73.08 | a | 74.50 | 64.21 | a | 56.19 | 46.95 | 46.31 | 55.14 | ||||||||||
2024 | 46.08 | 46.62 | a | 47.34 | 51.59 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.68 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 42.32 | 44.22 | 47.54 | 51.50 | 57.84 | 63.74 | 70.66 | 70.24 | 64.58 | 55.14 | 46.51 | 41.57 | 54.80 | |||||||||||||
S.D. | 2.62 | 2.64 | 2.34 | 2.22 | 2.63 | 2.47 | 2.38 | 2.15 | 1.67 | 2.24 | 2.38 | 2.68 | 1.05 | |||||||||||||
SKEW | -0.59 | -0.22 | -0.08 | 0.09 | -0.30 | 0.33 | -0.67 | 0.25 | 0.15 | 0.55 | -0.26 | -0.48 | 0.35 | |||||||||||||
MAX | 47.40 | 49.39 | 52.07 | 56.70 | 62.43 | 69.64 | 74.56 | 74.50 | 68.50 | 60.18 | 51.53 | 46.31 | 57.05 | |||||||||||||
MIN | 36.38 | 37.65 | 42.37 | 47.68 | 52.50 | 59.07 | 64.02 | 66.13 | 61.28 | 50.84 | 40.71 | 35.37 | 53.10 | |||||||||||||
YRS | 35 | 35 | 34 | 34 | 32 | 33 | 31 | 33 | 32 | 34 | 34 | 34 | 28 |