YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.55 | i | 72.21 | g | 69.06 | e | 62.15 | c | 51.03 | b | 35.79 | b | 33.98 | c | 50.40 | g |
1958 | 29.26 | d | 37.36 | c | 36.23 | e | 46.18 | e | 60.88 | g | 69.03 | m | 73.63 | l | 73.21 | j | 65.08 | j | 52.19 | j | 39.72 | n | 37.24 | j | 37.26 | h |
1959 | 30.55 | j | 31.79 | k | 39.50 | k | 47.83 | l | 58.71 | j | 69.64 | h | 72.79 | s | 70.91 | n | 64.48 | g | 52.64 | f | 40.19 | f | 34.11 | i | ----- | z |
1960 | 26.00 | k | 29.21 | c | 41.59 | b | 51.81 | f | 56.24 | n | 67.27 | f | 71.66 | l | 71.63 | h | 65.76 | k | 51.18 | l | 40.41 | m | 28.83 | m | 35.40 | j |
1961 | 28.07 | j | 33.67 | j | 39.93 | h | 47.74 | m | 59.73 | k | 69.71 | i | 72.83 | k | 69.17 | h | 59.37 | k | 50.23 | i | 35.97 | k | 24.92 | l | ----- | z |
1962 | 24.20 | i | 36.26 | i | 35.66 | i | 53.17 | i | 56.70 | i | 66.98 | i | 71.52 | j | 70.85 | h | 63.23 | j | 53.48 | h | 41.98 | i | 35.66 | l | ----- | z |
1963 | 25.82 | i | 34.78 | j | 35.93 | j | 47.93 | a | 60.60 | 65.47 | 74.71 | 70.36 | c | 66.69 | l | 56.41 | i | 41.82 | m | 30.91 | n | 63.81 | g | |||
1964 | 25.83 | m | 24.24 | l | 34.34 | i | 46.25 | b | 58.02 | 66.02 | b | 73.44 | f | 69.37 | h | 62.98 | e | 53.77 | i | 39.31 | l | 30.73 | i | 58.32 | h | |
1965 | 27.65 | k | 32.47 | i | 37.17 | h | 49.52 | i | 56.31 | e | 64.02 | 70.84 | 69.26 | 60.08 | 53.63 | 43.43 | a | 33.58 | e | 56.39 | d | |||||
1966 | 25.67 | j | 27.89 | i | 41.17 | h | 50.07 | c | 60.52 | 66.17 | 73.73 | 70.61 | 62.95 | 52.02 | 42.90 | 32.21 | e | 56.80 | c | |||||||
1967 | 29.66 | o | 35.55 | i | 45.25 | i | 49.62 | b | 56.34 | 65.25 | 73.08 | 67.55 | 62.22 | a | 53.45 | 42.28 | 27.50 | m | 58.73 | d | ||||||
1968 | 28.70 | i | 35.25 | i | 38.93 | j | 44.08 | 55.61 | 68.23 | 70.18 | 66.53 | 60.70 | 52.11 | 38.86 | b | 27.14 | i | 57.04 | d | |||||||
1969 | 33.31 | j | 33.76 | i | 33.94 | m | 49.12 | a | 58.81 | 62.50 | 71.37 | 70.92 | 60.17 | 46.38 | c | 36.46 | b | 30.02 | g | 56.97 | d | |||||
1970 | 26.74 | l | 33.37 | i | 35.27 | c | 42.10 | 56.40 | e | 62.83 | 69.18 | 68.55 | 57.73 | 44.58 | 38.08 | 27.98 | g | 52.75 | c | |||||||
1971 | 24.00 | n | 33.50 | j | 37.14 | j | 47.21 | d | 54.66 | b | 67.38 | 71.78 | d | 68.86 | c | 61.56 | c | 49.39 | 37.76 | e | 24.50 | j | 57.32 | d | ||
1972 | 28.04 | f | 35.75 | c | 45.81 | 49.17 | a | 57.47 | 66.63 | 72.63 | 69.42 | a | 62.63 | 53.02 | d | 33.15 | d | 27.74 | d | 52.13 | a | |||||
1973 | 24.46 | e | 31.46 | d | 37.84 | 42.83 | 55.16 | 66.52 | 71.76 | 71.15 | 61.15 | 53.27 | 40.90 | f | 32.16 | l | 51.56 | b | ||||||||
1974 | 26.95 | k | 29.86 | j | 43.95 | j | 48.86 | h | 62.03 | b | 70.30 | 71.48 | 68.20 | a | 62.57 | 52.87 | 40.22 | a | 27.70 | h | 61.10 | e | ||||
1975 | 26.39 | l | 32.42 | j | 39.30 | c | 44.83 | a | 55.23 | a | 65.65 | 70.87 | 69.11 | 61.00 | 51.86 | b | 39.62 | b | 32.24 | f | 55.28 | c | ||||
1976 | 29.97 | l | 39.53 | k | 41.07 | i | 49.40 | d | 58.48 | 67.76 | a | 71.98 | 68.95 | 63.34 | b | 49.15 | k | 38.22 | e | 22.47 | a | 55.08 | d | |||
1977 | 22.58 | a | 31.73 | 38.27 | 50.58 | 58.08 | 69.95 | 72.26 | 71.79 | 64.40 | 53.84 | 42.33 | a | 37.00 | e | 51.07 | ||||||||||
1978 | 32.83 | m | 33.53 | k | 44.54 | h | 51.81 | c | 56.31 | 69.33 | 74.27 | 69.76 | 64.12 | a | 54.10 | a | 41.87 | 27.52 | 56.57 | c | ||||||
1979 | 23.53 | 31.39 | a | 40.43 | a | 48.52 | 56.81 | 67.19 | a | 72.63 | 69.47 | 66.23 | 56.33 | b | 34.71 | b | 33.79 | 50.09 | ||||||||
1980 | 34.32 | 37.76 | 38.90 | 47.05 | 56.27 | a | 70.26 | a | 74.73 | 71.87 | 65.10 | 51.12 | a | 39.90 | 37.22 | h | 53.39 | a | ||||||||
1981 | 33.75 | g | 36.93 | e | 38.69 | d | 52.10 | 56.77 | a | 69.60 | 72.76 | 69.05 | 62.23 | 50.65 | 42.79 | b | 33.10 | k | 55.16 | b | ||||||
1982 | 28.55 | i | 29.70 | h | 39.83 | j | 47.85 | f | 55.39 | c | 65.47 | a | 71.95 | b | 70.87 | 63.33 | f | 48.50 | l | 38.62 | m | 30.11 | l | 65.92 | h | |
1983 | 31.44 | o | 34.78 | l | 40.26 | l | 43.84 | k | 54.52 | c | 62.73 | b | 70.31 | 69.32 | 63.90 | e | 49.84 | l | 39.11 | k | 27.82 | f | 64.16 | g | ||
1984 | 25.64 | f | 31.18 | d | 37.57 | d | 44.14 | a | 60.60 | a | 64.77 | 71.66 | 68.66 | b | 64.17 | 45.13 | 39.02 | c | 30.27 | e | 50.65 | a | ||||
1985 | 26.76 | d | 29.39 | e | 38.78 | d | 49.28 | 56.69 | 67.80 | 72.48 | 70.15 | 60.64 | a | 51.32 | 40.60 | 33.84 | 49.81 | |||||||||
1986 | 36.77 | 34.75 | 44.52 | 50.40 | 57.84 | 65.93 | 69.58 | 71.03 | 60.52 | a | 48.52 | a | 37.48 | b | 30.53 | 50.66 | ||||||||||
1987 | 27.03 | 33.48 | 37.84 | 47.47 | 55.32 | 68.08 | 72.12 | a | 69.24 | 62.82 | 54.21 | 37.74 | a | 29.90 | 49.60 | |||||||||||
1988 | 22.03 | 34.47 | 38.08 | a | 47.45 | 56.02 | 68.71 | a | 72.66 | 70.21 | 61.40 | 56.40 | a | 41.97 | 33.19 | 50.22 | ||||||||||
1989 | 26.00 | 32.65 | b | 47.23 | 53.66 | a | 59.45 | 65.02 | 69.79 | 65.61 | 60.98 | 49.60 | 42.03 | 32.45 | a | 50.37 | ||||||||||
1990 | 27.74 | 32.66 | 42.75 | a | 50.55 | 57.34 | 70.88 | a | 70.27 | 69.08 | 65.48 | 53.55 | 42.17 | 24.38 | g | 52.95 | a | |||||||||
1991 | 23.38 | a | 35.02 | 39.82 | a | 47.47 | 57.23 | 65.70 | 71.02 | a | 70.53 | a | 62.57 | 56.10 | 39.07 | 30.84 | 49.89 | |||||||||
1992 | 27.54 | d | 35.47 | 42.42 | a | 53.58 | 59.71 | 66.88 | 69.84 | 69.27 | 64.33 | 55.82 | 36.15 | 24.74 | f | 52.82 | a | |||||||||
1993 | 30.57 | c | 35.40 | b | 43.17 | b | 49.74 | a | 57.62 | a | 65.89 | b | 71.14 | c | 68.74 | 62.87 | 51.90 | a | 37.83 | d | 31.75 | e | 50.55 | |||
1994 | 32.54 | d | 31.68 | c | 44.73 | e | 50.26 | c | 59.19 | b | 72.26 | a | 74.52 | b | 73.26 | 63.93 | a | 51.28 | b | 38.25 | d | 34.02 | b | 52.16 | ||
1995 | 31.71 | c | 41.10 | b | 43.43 | b | 45.96 | c | 55.63 | 65.81 | a | 71.68 | a | 73.85 | a | 64.03 | a | 52.92 | a | 44.68 | b | 36.19 | b | 52.25 | ||
1996 | 32.14 | f | 39.14 | d | 42.55 | c | 50.46 | g | 64.55 | a | 70.93 | 74.69 | 73.09 | b | 61.76 | a | 52.08 | f | 43.25 | d | 32.52 | b | 55.83 | c | ||
1997 | 27.48 | e | 34.66 | f | 45.98 | d | 47.12 | d | 59.20 | d | 68.02 | 72.16 | b | 71.41 | b | 67.05 | 52.38 | b | 40.96 | c | 29.24 | f | 55.18 | b | ||
1998 | 33.86 | f | 32.86 | g | 41.76 | d | 46.08 | d | 60.11 | c | 68.48 | b | 73.74 | 73.03 | a | 68.22 | c | 52.16 | c | 44.13 | d | 34.31 | b | 56.20 | b | |
1999 | 36.70 | i | 39.50 | e | 45.85 | d | 46.69 | c | 55.95 | b | 66.71 | b | 72.67 | a | 69.40 | a | 62.96 | b | 54.66 | b | 46.79 | d | 30.80 | d | 53.82 | a |
2000 | 33.82 | i | 39.86 | g | 43.33 | d | 52.10 | d | 63.75 | c | 71.16 | a | 74.44 | d | 74.81 | b | 71.44 | v | 51.66 | b | 34.07 | a | 33.87 | e | 55.46 | c |
2001 | 28.28 | a | 35.32 | 43.53 | a | 52.82 | b | 62.88 | a | 70.82 | b | 74.84 | 71.82 | a | 67.21 | a | 55.67 | e | 46.60 | d | 31.75 | c | 53.46 | |||
2002 | 32.81 | e | 33.11 | f | 41.61 | h | 55.60 | j | 61.46 | e | 73.69 | a | 75.68 | a | 72.74 | 64.24 | a | 51.23 | a | 40.70 | b | 31.59 | c | 56.02 | c | |
2003 | 37.83 | a | 36.93 | 42.27 | 50.44 | d | 60.38 | e | 69.44 | d | 78.33 | b | 74.05 | b | 65.03 | 57.50 | 40.25 | b | 33.63 | 53.84 | ||||||
2004 | 31.09 | b | 31.17 | 48.83 | a | 49.80 | b | 61.38 | a | 70.09 | a | 72.63 | 71.87 | 63.83 | a | 50.63 | a | 40.09 | a | 31.72 | b | 51.93 | ||||
2005 | 36.84 | 36.59 | a | 40.92 | a | 49.67 | 60.43 | a | 67.59 | m | 76.60 | b | 71.44 | 66.14 | a | 55.02 | b | 42.70 | 32.28 | b | 51.69 | a | ||||
2006 | 33.31 | b | 35.34 | c | 41.02 | b | 52.33 | 63.33 | h | 70.73 | b | 74.61 | c | 70.58 | 60.72 | a | 51.78 | a | 42.78 | a | 31.05 | a | 51.30 | a | ||
2007 | 24.53 | b | 32.65 | b | 43.68 | f | 48.77 | d | 57.97 | a | 68.07 | c | 75.43 | b | 74.39 | c | 66.15 | 53.06 | d | 44.55 | a | 31.34 | c | 52.45 | a | |
2008 | 25.15 | 33.31 | c | 40.52 | d | 46.98 | f | 57.83 | a | 68.96 | c | 73.56 | 72.93 | a | 64.20 | 53.43 | c | 43.36 | a | 32.89 | 51.47 | a | ||||
2009 | 32.21 | b | 37.04 | b | 42.95 | b | 48.06 | d | 61.60 | 65.33 | 75.05 | 71.69 | 63.95 | 49.45 | 44.07 | 27.82 | 51.60 | |||||||||
2010 | 28.84 | 32.39 | 40.40 | 50.77 | 57.48 | 71.82 | 74.95 | 71.89 | 67.98 | 56.44 | 40.38 | 38.60 | 52.66 | |||||||||||||
2011 | 28.89 | 31.32 | 45.21 | 50.67 | 54.52 | 72.08 | 76.19 | 75.00 | 64.98 | 54.05 | 41.10 | 29.89 | 51.99 | |||||||||||||
2012 | 36.92 | 34.84 | 44.92 | 54.25 | 62.11 | 72.40 | 73.35 | 73.74 | 66.70 | 54.69 | 44.02 | 31.34 | 54.11 | |||||||||||||
2013 | 21.21 | 31.50 | 41.87 | 47.52 | 59.15 | 71.48 | 73.78 | a | 71.47 | 65.62 | 50.73 | a | 39.75 | 29.85 | a | 50.33 | ||||||||||
2014 | 31.45 | b | 37.92 | b | 44.03 | 50.80 | 57.60 | 69.95 | 74.35 | 70.23 | 68.78 | 55.40 | 40.38 | b | 35.71 | c | 53.05 | |||||||||
2015 | 32.50 | b | 38.11 | 45.32 | 51.30 | 55.69 | 71.80 | 71.97 | 72.34 | 67.70 | 56.00 | 40.69 | a | 31.31 | 52.89 | |||||||||||
2016 | 28.42 | 37.90 | 43.71 | 49.15 | 57.50 | 72.98 | 75.61 | 67.31 | 64.13 | 55.35 | 43.91 | a | 31.63 | 52.30 | ||||||||||||
2017 | 32.39 | 40.38 | 47.68 | 50.38 | 56.94 | 71.23 | 74.34 | 70.40 | 64.93 | 53.08 | 45.88 | 35.76 | 53.62 | |||||||||||||
2018 | 34.21 | 35.98 | 42.17 | a | 52.37 | 62.00 | 71.37 | 74.39 | 71.42 | 65.72 | 51.87 | 37.10 | d | 31.00 | b | 52.47 | ||||||||||
2019 | 27.63 | d | 31.22 | a | 41.25 | c | 50.72 | c | 53.15 | a | 65.89 | c | 73.00 | b | 71.68 | a | 66.02 | a | 48.93 | a | 39.80 | 31.21 | c | 50.04 | ||
2020 | 28.44 | 32.89 | b | 41.79 | c | 50.38 | b | 61.61 | 69.27 | 71.68 | 74.21 | 64.44 | c | 52.85 | 42.62 | 28.30 | a | 51.54 | ||||||||
2021 | 29.37 | 31.70 | 36.00 | 42.70 | 55.98 | 68.43 | a | 73.08 | a | 72.06 | n | 68.16 | a | 51.95 | a | 44.17 | 35.64 | b | 48.83 | a | ||||||
2022 | 31.16 | 29.86 | 41.31 | 50.09 | c | 60.47 | a | 67.91 | c | ----- | z | ----- | z | 66.27 | b | 51.61 | 39.62 | f | 31.85 | d | 47.84 | c | ||||
2023 | 29.11 | c | 32.06 | a | 38.27 | c | 48.16 | b | 58.40 | 66.12 | a | 77.70 | a | 73.85 | a | 66.50 | a | 56.50 | 40.42 | 32.45 | b | 51.63 | ||||
2024 | 30.74 | b | 36.14 | a | 40.68 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.85 | i |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.44 | 34.45 | 41.77 | 48.94 | 58.21 | 68.20 | 73.02 | 70.80 | 63.90 | 52.58 | 40.71 | 32.03 | 51.63 | |||||||||||||
S.D. | 4.22 | 3.04 | 3.15 | 2.80 | 2.56 | 2.74 | 2.01 | 2.11 | 2.41 | 2.74 | 3.08 | 2.80 | 1.36 | |||||||||||||
SKEW | 0.04 | 0.25 | 0.03 | -0.50 | 0.43 | -0.05 | 0.32 | 0.02 | -0.05 | -0.73 | -0.29 | -0.56 | 0.16 | |||||||||||||
MAX | 37.83 | 41.10 | 48.83 | 54.25 | 64.55 | 73.69 | 78.33 | 75.00 | 68.78 | 57.50 | 46.79 | 38.60 | 54.11 | |||||||||||||
MIN | 21.21 | 29.21 | 35.27 | 42.10 | 53.15 | 62.50 | 69.18 | 65.61 | 57.73 | 44.58 | 33.15 | 22.47 | 49.60 | |||||||||||||
YRS | 41 | 45 | 49 | 55 | 60 | 60 | 59 | 59 | 59 | 56 | 56 | 45 | 27 |