YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1955 | ----- | z | 38.36 | 42.42 | 44.67 | 55.97 | 61.03 | 66.00 | 70.29 | 62.90 | 54.23 | a | 39.53 | 41.48 | 52.44 | a | ||||||||||
1956 | 41.55 | 34.97 | 43.32 | 49.07 | 56.19 | 62.77 | 69.29 | 65.23 | 63.60 | 52.45 | 40.50 | 33.10 | a | 51.00 | ||||||||||||
1957 | 33.60 | a | 48.04 | b | 45.45 | 51.07 | 55.68 | 65.70 | 70.06 | 65.87 | 64.30 | 53.94 | 43.14 | a | 36.63 | a | 52.79 | |||||||||
1958 | 34.77 | a | 44.86 | 42.55 | 48.37 | 57.23 | a | 60.67 | 69.39 | 74.00 | g | 63.63 | 58.13 | a | 44.17 | 36.45 | 50.93 | a | ||||||||
1959 | 40.87 | 38.74 | a | 46.48 | 54.40 | 53.97 | a | 65.00 | 72.93 | a | 66.84 | 59.66 | a | 54.93 | b | 41.40 | 35.84 | 52.59 | ||||||||
1960 | 35.03 | 40.79 | 46.62 | b | 48.90 | 51.52 | 67.30 | 71.06 | 65.65 | 61.93 | 51.84 | 42.93 | a | 34.90 | a | 51.54 | ||||||||||
1961 | 33.83 | a | 42.82 | 43.73 | a | 49.80 | 52.29 | 65.83 | 72.27 | a | 71.43 | a | 59.43 | 54.43 | a | 39.67 | 37.77 | a | 51.94 | |||||||
1962 | 30.97 | a | 41.46 | 42.74 | 52.63 | 54.23 | 63.73 | 67.90 | 67.35 | 62.57 | 53.17 | a | 45.20 | 34.93 | d | 51.41 | ||||||||||
1963 | 29.16 | 46.39 | 43.16 | 45.90 | 55.47 | a | 60.77 | 67.10 | 66.87 | 66.14 | a | 56.53 | a | 44.60 | 33.73 | a | 51.32 | |||||||||
1964 | 34.45 | 37.66 | 41.39 | 49.30 | 53.42 | 63.20 | 69.45 | 68.29 | 58.43 | 57.23 | 40.07 | 40.55 | 51.12 | |||||||||||||
1965 | 38.13 | 38.89 | 45.03 | 49.90 | 51.83 | b | 56.10 | 64.40 | a | 66.74 | d | 56.83 | 51.90 | 46.77 | 32.23 | a | 49.90 | |||||||||
1966 | 32.77 | 34.75 | 43.17 | a | 51.63 | 57.32 | 61.23 | 64.39 | 67.61 | 60.07 | 51.20 | a | 43.71 | b | 39.41 | b | 50.61 | |||||||||
1967 | 33.39 | ----- | z | ----- | z | 41.10 | 53.10 | a | 58.77 | 68.48 | 69.84 | 64.10 | 50.26 | 47.30 | 30.26 | 51.66 | b | |||||||||
1968 | 31.57 | a | 45.31 | 42.74 | 46.59 | a | 53.26 | 61.13 | 67.39 | 62.71 | 59.07 | 51.19 | 42.33 | 31.39 | 49.56 | |||||||||||
1969 | 39.03 | 37.68 | 41.13 | 46.37 | 56.52 | 59.40 | 65.52 | 64.65 | 58.20 | 47.35 | 39.47 | 34.39 | 49.14 | |||||||||||||
1970 | 39.06 | 40.54 | 42.61 | 42.61 | b | 53.10 | a | 62.07 | 68.35 | 64.90 | 57.10 | 47.94 | 39.93 | 37.26 | 49.62 | |||||||||||
1971 | 33.35 | 35.25 | 40.23 | 44.10 | 49.62 | b | 58.60 | 67.13 | a | 67.52 | 60.21 | a | 45.90 | a | 37.11 | b | 32.87 | a | 47.66 | |||||||
1972 | 32.13 | 40.55 | 46.41 | b | 48.13 | 55.97 | 64.34 | a | 67.80 | a | 66.19 | 59.23 | 51.45 | 40.83 | a | 32.69 | b | 50.48 | ||||||||
1973 | 35.16 | 42.54 | 40.52 | 45.27 | 57.10 | 61.57 | 63.48 | 63.77 | a | 57.38 | a | 48.11 | c | 41.00 | a | 35.55 | b | 49.29 | ||||||||
1974 | 38.00 | c | 33.65 | b | 43.21 | b | 43.68 | b | 52.37 | a | 61.07 | 66.20 | a | 66.59 | b | ----- | z | 50.29 | x | 37.21 | b | 35.60 | a | 47.76 | b | |
1975 | 30.69 | b | 38.36 | 40.03 | a | 40.77 | d | 52.68 | 59.21 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.62 | f | ||
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 | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.50 | g | 45.38 | f | 37.18 | c | 37.18 | k |
2002 | 34.06 | m | 37.77 | f | 43.32 | c | 48.48 | i | 55.53 | a | 64.12 | d | 66.26 | d | 64.50 | k | 61.76 | e | 51.20 | f | 41.45 | a | 39.33 | g | 55.41 | f |
2003 | 39.97 | b | 38.67 | g | 44.59 | b | 46.77 | 55.52 | 61.65 | d | 72.36 | f | 66.23 | 65.04 | f | 53.25 | c | 41.70 | c | 39.44 | d | 49.90 | c | |||
2004 | 40.65 | k | 40.00 | y | 48.35 | e | 49.48 | g | 55.34 | b | 61.89 | b | 68.48 | 65.45 | 58.86 | a | 53.27 | a | 40.23 | d | 35.76 | b | 54.18 | c | ||
2005 | 39.90 | a | 43.31 | b | 45.70 | a | 45.69 | a | 56.16 | 57.62 | a | 69.90 | b | 66.97 | 56.70 | 50.81 | d | 41.59 | c | 39.27 | a | 51.13 | ||||
2006 | 35.87 | 36.27 | b | 37.97 | a | 47.46 | b | 56.25 | c | 65.69 | a | 70.97 | 63.79 | c | 57.69 | d | 48.11 | c | 42.45 | a | 31.77 | a | 49.52 | |||
2007 | 27.03 | 40.56 | a | 46.24 | b | 48.38 | d | 55.61 | 62.21 | b | 67.60 | a | 67.68 | 59.47 | 49.77 | a | 43.59 | c | 34.53 | a | 50.22 | |||||
2008 | 36.65 | 38.86 | a | 41.83 | b | 46.37 | 55.33 | a | 62.43 | 69.71 | c | 68.36 | c | 61.43 | 51.70 | d | 44.80 | 35.16 | 51.05 | |||||||
2009 | 35.07 | d | 38.12 | b | 41.86 | c | 45.59 | a | 60.15 | d | 61.71 | b | 69.37 | a | 65.60 | a | 63.33 | c | 49.93 | c | 38.36 | b | 36.93 | b | 50.50 | |
2010 | 38.68 | 42.33 | a | 40.94 | 44.73 | d | 50.00 | a | 60.72 | a | 67.40 | a | 62.96 | c | 58.31 | a | 54.41 | b | 38.60 | 42.10 | 50.10 | |||||
2011 | 36.50 | a | 35.56 | a | 42.58 | 46.53 | 50.03 | 58.13 | 65.87 | 64.52 | 62.93 | 52.03 | a | 39.03 | 28.13 | 48.49 | ||||||||||
2012 | 32.42 | 38.41 | 41.68 | 48.80 | 54.23 | 60.20 | 65.10 | 69.45 | 64.27 | 53.03 | 42.57 | 36.77 | a | 50.58 | ||||||||||||
2013 | 31.45 | 34.50 | 45.81 | 52.57 | 57.10 | a | 61.83 | 69.94 | 66.32 | 59.57 | 48.29 | 42.10 | 29.94 | 49.95 | ||||||||||||
2014 | 34.90 | 42.07 | 47.32 | 50.60 | 57.60 | a | 63.60 | 70.90 | a | 68.48 | 64.63 | 54.52 | 44.90 | 42.03 | 53.46 | |||||||||||
2015 | 35.97 | 41.75 | 46.42 | 48.93 | a | 54.47 | a | 66.00 | a | 69.26 | 67.38 | b | 63.23 | 56.84 | 38.83 | 33.84 | 51.91 | |||||||||
2016 | 41.57 | a | 40.31 | 45.27 | a | 50.97 | a | 56.16 | 66.28 | a | 67.65 | 67.29 | 59.60 | 52.35 | 43.48 | a | 36.03 | a | 52.25 | |||||||
2017 | 36.10 | 41.32 | 43.74 | 46.59 | a | 55.90 | 64.61 | b | 69.30 | a | 69.07 | d | 61.92 | d | 47.21 | c | 44.25 | f | 29.90 | j | 53.58 | b | ||||
2018 | 39.13 | h | 34.87 | e | 40.30 | h | 49.95 | i | 54.46 | e | 58.50 | h | 70.85 | e | 65.06 | m | 58.36 | e | 51.00 | c | 41.96 | e | 37.09 | h | 51.92 | f |
2019 | 37.81 | e | 36.29 | d | 41.96 | g | 49.60 | o | 52.59 | i | 63.18 | b | 66.57 | a | 67.92 | g | 56.68 | k | 47.68 | f | 41.56 | c | 39.95 | i | 49.08 | g |
2020 | 36.12 | e | 34.71 | o | 41.82 | n | 48.61 | g | 55.81 | e | 62.37 | 65.34 | b | 67.89 | c | 65.57 | p | 53.12 | f | 37.28 | e | 31.21 | c | 50.86 | e | |
2021 | 34.71 | c | 38.61 | 39.14 | j | 46.89 | c | 55.31 | e | 64.62 | d | 71.33 | d | 65.00 | h | 63.04 | b | 50.25 | g | 42.50 | 39.45 | 50.72 | c | |||
2022 | 34.93 | c | 34.30 | a | 45.77 | e | 49.07 | b | 55.00 | h | 64.46 | f | 68.36 | c | 67.09 | h | 63.30 | j | 57.00 | i | 37.85 | q | 39.94 | o | 46.48 | g |
2023 | 38.08 | r | 34.36 | f | 40.21 | g | 45.62 | f | 52.04 | g | 58.35 | g | 65.58 | e | 64.63 | l | 60.90 | t | 57.00 | n | 41.94 | l | 44.00 | o | 65.58 | k |
2024 | 42.85 | k | 44.52 | h | 45.13 | h | 41.80 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 35.35 | 39.43 | 43.58 | 47.57 | 54.74 | 62.21 | 68.15 | 66.74 | 60.83 | 51.96 | 41.64 | 35.58 | 50.68 | |||||||||||||
S.D. | 3.42 | 3.61 | 2.36 | 3.12 | 2.26 | 2.59 | 2.27 | 2.02 | 2.61 | 3.01 | 2.52 | 3.45 | 1.33 | |||||||||||||
SKEW | -0.12 | 0.35 | -0.06 | -0.10 | -0.43 | -0.14 | -0.02 | 0.08 | 0.14 | 0.01 | 0.16 | 0.03 | -0.05 | |||||||||||||
MAX | 41.57 | 48.04 | 48.35 | 54.40 | 60.15 | 67.30 | 72.93 | 71.43 | 66.14 | 58.13 | 47.30 | 42.10 | 53.46 | |||||||||||||
MIN | 27.03 | 33.65 | 37.97 | 40.77 | 49.62 | 56.10 | 63.48 | 62.71 | 56.70 | 45.90 | 37.11 | 28.13 | 47.66 | |||||||||||||
YRS | 38 | 37 | 37 | 37 | 40 | 40 | 41 | 35 | 36 | 35 | 39 | 37 | 28 |