YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.82 | a | 56.82 | 55.61 | 41.83 | 36.85 | 50.99 | g | ||||
1951 | 31.42 | 34.05 | 39.21 | 45.52 | 53.45 | 60.52 | 70.82 | 65.55 | a | 60.22 | 54.68 | 38.22 | 30.73 | 48.70 | ||||||||||||
1952 | 33.21 | 32.20 | f | 34.21 | e | 46.88 | 56.11 | 65.28 | 66.60 | a | 64.90 | a | 60.97 | 52.81 | b | 34.02 | a | 28.92 | 49.45 | a | ||||||
1953 | 35.94 | g | 33.00 | a | 40.22 | a | 47.47 | 51.12 | c | 62.31 | d | 68.71 | 65.15 | 61.00 | 51.84 | 42.92 | 30.05 | 50.34 | a | |||||||
1954 | 34.42 | 40.52 | 39.84 | c | 49.85 | 56.05 | 63.47 | 68.95 | a | 66.63 | 62.00 | 52.03 | 42.21 | a | 31.90 | a | 50.65 | |||||||||
1955 | 26.50 | e | 25.75 | b | 37.36 | c | 41.12 | d | 50.15 | g | 58.43 | a | 63.62 | a | 63.80 | a | 58.44 | c | 52.15 | d | 37.62 | f | 36.88 | b | 46.40 | b |
1956 | 35.46 | e | 27.66 | 38.54 | c | 41.95 | b | 54.14 | c | 65.57 | c | 65.93 | d | 62.98 | b | 63.92 | d | 50.44 | f | 32.42 | k | 30.74 | d | 48.69 | b | |
1957 | 34.07 | a | 40.32 | c | 40.09 | o | 44.06 | d | 48.70 | a | 63.30 | 67.55 | a | 64.77 | a | 61.11 | c | 48.07 | b | 34.13 | c | 34.83 | b | 49.17 | a | |
1958 | 29.17 | b | 37.92 | b | 34.56 | 45.05 | a | 56.76 | 65.02 | 68.61 | 67.65 | 58.73 | 50.50 | 37.87 | 37.17 | d | 49.08 | |||||||||
1959 | 33.56 | 35.44 | a | 42.10 | 49.65 | 53.18 | 65.30 | 71.06 | 65.39 | 59.17 | 48.42 | a | 38.08 | 32.53 | a | 49.49 | ||||||||||
1960 | 25.65 | 30.03 | 42.73 | 47.75 | 52.13 | 65.18 | 71.37 | 68.00 | 61.02 | 47.65 | 39.30 | 27.74 | 48.21 | |||||||||||||
1961 | 30.81 | 35.45 | 39.05 | 45.98 | f | 52.78 | a | 66.43 | 69.52 | 65.66 | 58.31 | a | 48.61 | c | 38.77 | b | 29.80 | a | 48.65 | a | ||||||
1962 | 29.16 | 34.79 | 33.87 | 48.75 | 51.87 | a | 60.57 | 68.10 | 65.89 | 60.60 | 49.60 | 42.73 | 33.23 | 48.26 | ||||||||||||
1963 | 27.07 | a | 39.30 | 37.03 | 43.16 | a | 55.56 | 59.35 | 69.20 | a | 65.02 | 62.35 | 53.18 | 40.70 | 30.39 | 48.53 | ||||||||||
1964 | 28.03 | 29.05 | 34.44 | 42.37 | 52.40 | 59.97 | 66.77 | 65.19 | 58.12 | 51.19 | 34.20 | 33.30 | a | 46.25 | ||||||||||||
1965 | 33.44 | 31.62 | 35.00 | 43.73 | 50.32 | 57.96 | b | 67.11 | 65.05 | 56.37 | 48.30 | a | 40.17 | 32.77 | 46.82 | |||||||||||
1966 | 26.00 | 29.55 | 38.88 | a | 46.53 | 55.84 | 62.13 | 69.68 | 67.00 | 60.60 | 48.82 | 42.70 | 29.79 | b | 48.13 | |||||||||||
1967 | 27.58 | 35.34 | 43.65 | 43.45 | 51.79 | 59.82 | 68.24 | 66.15 | 61.43 | 51.97 | 43.30 | 25.90 | 48.22 | |||||||||||||
1968 | 28.55 | 38.26 | 39.61 | 44.94 | d | 52.37 | 62.12 | 65.48 | 63.10 | 59.92 | 51.02 | 39.22 | a | 29.40 | a | 47.83 | ||||||||||
1969 | 36.65 | 33.04 | 34.63 | 46.78 | a | 53.65 | 61.67 | a | 69.52 | 70.66 | 62.47 | 48.08 | a | 37.70 | 36.44 | 49.27 | ||||||||||
1970 | 30.24 | 38.61 | 37.31 | 40.73 | 55.27 | 63.18 | 70.34 | 68.68 | 58.67 | 46.44 | 41.90 | 34.16 | 48.79 | |||||||||||||
1971 | 32.48 | 34.55 | 41.32 | 45.47 | 51.83 | a | 62.58 | 69.18 | 65.18 | 58.62 | 45.66 | 38.32 | 30.10 | 47.94 | ||||||||||||
1972 | 33.89 | 37.17 | 45.15 | 48.16 | a | 52.95 | 62.40 | 69.61 | 66.95 | 60.85 | 50.45 | 35.70 | 29.85 | 49.43 | ||||||||||||
1973 | 28.18 | 33.39 | 34.61 | 41.72 | 54.05 | 62.18 | 67.90 | 67.32 | 59.09 | a | 50.95 | 40.83 | 35.85 | 48.01 | ||||||||||||
1974 | 31.18 | 33.61 | 42.32 | 44.65 | 56.50 | a | 69.07 | a | 67.98 | b | 66.13 | a | 59.75 | 50.98 | 38.32 | e | 29.96 | c | 49.21 | |||||||
1975 | 30.15 | 32.70 | 37.05 | 41.33 | a | 50.08 | a | 60.57 | 68.90 | 66.29 | 59.38 | 50.02 | a | 37.97 | a | 30.18 | 47.05 | |||||||||
1976 | 31.19 | 38.50 | b | 37.32 | 45.34 | a | 54.35 | 61.75 | 67.39 | 65.52 | 59.45 | 46.95 | 38.09 | a | 30.93 | a | 48.07 | |||||||||
1977 | 28.72 | a | 35.02 | a | 36.61 | 46.45 | 50.87 | 63.83 | 69.61 | 68.32 | 63.03 | 52.50 | 41.87 | 39.09 | c | 49.66 | ||||||||||
1978 | 34.13 | d | 32.32 | c | 42.82 | a | 47.00 | 52.42 | 64.08 | 68.48 | 65.76 | 61.40 | 52.97 | a | 40.21 | a | 27.97 | 49.13 | ||||||||
1979 | 28.35 | 33.24 | a | 37.82 | 46.45 | 52.18 | 62.07 | 68.13 | 65.00 | 63.50 | 53.47 | a | 35.74 | a | 33.88 | c | 48.32 | |||||||||
1980 | 34.52 | a | 37.81 | b | 38.41 | d | 45.57 | 50.29 | 63.85 | 69.94 | 65.97 | b | 60.98 | 49.45 | 40.16 | b | 37.90 | b | 49.57 | |||||||
1981 | 35.93 | b | 37.24 | a | 38.92 | 50.23 | b | 54.77 | 67.22 | 69.68 | 68.00 | 60.78 | 48.74 | 43.67 | l | 36.92 | k | 53.15 | b | |||||||
1982 | 31.92 | l | 36.05 | i | 42.10 | k | 47.78 | g | 53.12 | f | 60.54 | d | 67.33 | d | 67.48 | e | 62.66 | e | 46.90 | e | 39.50 | f | 33.83 | e | 56.46 | f |
1983 | 33.75 | m | 35.95 | i | 40.91 | h | 39.35 | j | 53.54 | f | 60.60 | d | 69.33 | d | 67.20 | f | 65.46 | e | 50.98 | g | 37.91 | g | 36.40 | f | 65.13 | i |
1984 | 32.48 | j | 34.95 | j | 40.77 | i | 44.24 | i | 59.35 | 61.77 | d | 68.66 | f | 67.28 | d | 63.08 | f | 45.20 | h | 39.67 | f | 33.87 | l | 62.80 | i | |
1985 | 31.26 | j | 30.88 | l | 41.33 | m | 49.20 | h | 56.25 | g | 64.70 | g | 69.35 | h | 67.28 | h | 56.91 | h | 49.80 | i | 38.67 | f | 32.20 | a | 32.20 | k |
1986 | 38.10 | b | 38.52 | b | 43.14 | b | 47.52 | c | 54.71 | g | 63.72 | g | 66.69 | e | 67.69 | g | 57.15 | g | 47.59 | h | 40.95 | h | 34.22 | m | 46.79 | g |
1987 | 30.24 | l | 33.85 | k | 37.18 | i | 48.80 | j | 51.83 | k | 63.22 | g | 65.18 | i | 64.83 | h | 58.92 | e | 53.02 | e | 38.11 | g | 32.35 | e | 48.10 | i |
1988 | 29.53 | l | 37.03 | m | 39.64 | i | 47.74 | i | 53.60 | a | 64.53 | a | 69.44 | d | 66.20 | c | 57.26 | c | 54.56 | f | 40.90 | i | 31.30 | i | 62.21 | g |
1989 | 29.75 | m | 33.61 | j | 45.82 | i | 51.64 | i | 57.54 | c | 62.76 | a | 70.62 | b | 65.30 | c | 62.19 | c | 50.28 | f | 40.40 | f | 33.57 | j | 63.68 | g |
1990 | 31.67 | m | 32.62 | l | 41.39 | m | 49.23 | f | 56.11 | c | 66.94 | e | 69.12 | a | 64.83 | a | 62.07 | b | 50.28 | d | 40.30 | e | 30.93 | i | 58.52 | e |
1991 | 30.50 | k | 39.08 | i | 35.24 | l | 45.32 | k | 53.69 | d | 58.94 | f | 67.86 | i | 66.64 | f | 60.04 | g | 52.10 | e | 39.23 | f | 31.73 | g | 52.89 | j |
1992 | 25.15 | n | 35.28 | k | 39.98 | i | 49.83 | j | 53.78 | f | 63.80 | t | 66.85 | 65.65 | 60.00 | a | 52.14 | b | 34.94 | e | 28.78 | d | 51.39 | f | ||
1993 | 34.41 | o | 35.36 | j | 41.73 | i | 46.39 | h | 55.32 | c | 61.19 | f | 66.93 | c | 66.29 | g | 59.40 | f | 49.27 | k | 38.70 | j | 33.59 | h | 61.12 | j |
1994 | 32.33 | m | 33.03 | j | 42.83 | h | 46.67 | l | 52.94 | f | 68.10 | e | 68.20 | f | 69.02 | d | 61.48 | g | 48.33 | g | 36.42 | k | 34.13 | h | 68.56 | j |
1995 | 31.37 | l | 40.08 | j | 42.41 | h | 44.70 | j | 51.17 | g | 60.52 | g | 68.30 | f | 68.83 | e | 61.29 | f | 51.46 | f | 44.15 | j | 34.96 | e | 51.89 | j |
1996 | 36.06 | m | 39.39 | j | 40.47 | l | 48.07 | i | 59.15 | k | 66.05 | i | 69.40 | k | 66.95 | k | 58.36 | l | 50.10 | k | 39.06 | l | 36.35 | k | ----- | z |
1997 | 29.58 | m | 33.00 | j | 42.40 | j | 45.71 | i | 57.45 | l | 61.89 | g | 68.38 | f | 67.48 | j | 63.77 | j | 51.17 | h | 43.17 | i | 29.36 | f | ----- | z |
1998 | 35.00 | k | ----- | z | 41.40 | j | 42.26 | i | 52.13 | l | 60.91 | h | 69.57 | i | 68.24 | j | 63.36 | h | 50.40 | j | 41.78 | l | 33.59 | i | ----- | z |
1999 | 37.02 | j | 38.74 | i | 44.23 | i | 44.88 | i | 54.62 | k | 63.00 | h | 67.62 | k | 65.57 | j | 60.83 | j | 51.42 | m | 44.20 | j | 31.06 | g | ----- | z |
2000 | 37.68 | l | 39.71 | j | 40.10 | j | 52.12 | j | 59.57 | i | 67.61 | k | 70.83 | k | 68.45 | j | 65.00 | j | 51.10 | j | 34.95 | j | 34.83 | k | ----- | z |
2001 | 30.30 | k | 36.19 | j | 42.48 | j | 49.42 | k | 60.60 | k | 64.82 | k | 67.95 | l | 66.40 | j | 64.27 | o | 54.07 | i | 39.95 | k | 31.39 | m | ----- | z |
2002 | 32.50 | k | 34.71 | i | 41.22 | m | 50.60 | j | 54.59 | i | 64.43 | p | 70.96 | f | 68.70 | h | 62.23 | j | 49.34 | i | 39.75 | l | 30.77 | i | ----- | z |
2003 | 38.40 | k | 35.42 | j | 40.86 | m | 45.21 | m | 57.95 | l | 65.33 | i | 71.95 | i | 68.70 | i | 62.78 | g | 55.70 | i | 40.95 | j | 33.34 | i | ----- | z |
2004 | 31.50 | m | 32.79 | o | 47.09 | h | 47.81 | i | 56.47 | l | 63.74 | k | 68.39 | l | 65.52 | i | 59.73 | j | 48.27 | k | 37.60 | a | 33.89 | c | 35.75 | j |
2005 | 35.45 | c | 39.98 | b | 41.04 | f | 47.33 | j | 57.50 | m | 64.03 | j | 71.13 | l | 65.89 | h | 62.56 | m | 52.39 | l | 41.58 | l | 33.54 | h | 37.71 | j |
2006 | 33.03 | m | 37.63 | i | 38.39 | h | 48.20 | j | 58.05 | j | 67.73 | h | 70.90 | j | 64.95 | 57.33 | d | 49.79 | g | 43.52 | b | 32.69 | g | 55.27 | i | |
2007 | 26.94 | e | 36.21 | d | 40.00 | l | 49.07 | i | 56.77 | k | 66.32 | e | 70.80 | a | 68.50 | a | 62.56 | c | 51.80 | c | 46.28 | c | 29.90 | f | 53.68 | d |
2008 | 30.30 | d | 35.08 | d | 40.79 | c | 47.17 | g | 52.96 | f | 65.98 | d | 69.32 | c | 67.90 | b | 61.22 | 50.62 | c | 42.71 | d | 34.15 | a | 49.81 | b | |
2009 | 34.13 | h | 37.63 | b | 41.85 | 46.98 | d | 58.81 | b | 60.69 | c | 70.75 | a | 68.30 | a | 60.23 | d | 48.97 | b | 41.89 | b | 27.48 | e | 51.24 | a | |
2010 | 30.36 | c | 31.96 | c | 38.22 | f | 46.98 | d | 52.61 | 64.87 | 70.39 | d | 68.07 | c | 63.12 | d | 53.05 | c | 37.35 | 38.68 | 50.68 | a | ||||
2011 | 19.33 | v | 35.27 | h | 45.89 | 47.48 | 52.18 | 63.50 | b | 68.47 | 69.89 | 62.20 | 50.63 | 39.27 | 27.47 | 52.70 | b | |||||||||
2012 | 35.27 | c | 34.93 | 42.64 | c | 49.53 | 58.47 | 67.03 | a | 69.85 | 68.66 | 61.00 | 52.73 | 42.47 | 33.15 | 51.31 | ||||||||||
2013 | 25.31 | 30.48 | 43.73 | a | 48.37 | 56.00 | 68.10 | 68.97 | 66.21 | 61.35 | 47.81 | 41.40 | 32.19 | 49.16 | ||||||||||||
2014 | 36.40 | 40.96 | 42.68 | c | 47.87 | 54.19 | 65.80 | 69.35 | 63.89 | 63.22 | 53.71 | 40.89 | c | 37.30 | f | 52.63 | a | |||||||||
2015 | 33.93 | c | 42.02 | 44.79 | 47.73 | 52.18 | a | 67.17 | 66.63 | 68.79 | 62.80 | 52.89 | 37.72 | 31.58 | 50.69 | |||||||||||
2016 | 32.28 | a | 37.86 | 44.65 | 47.02 | 53.18 | 68.32 | 69.63 | 66.08 | g | 60.75 | 55.61 | 40.88 | 36.19 | 49.67 | a | ||||||||||
2017 | 32.34 | b | 40.54 | 45.20 | a | 48.70 | 54.94 | 68.59 | a | 69.09 | d | 66.32 | 61.03 | 53.05 | 49.45 | 36.15 | 52.12 | |||||||||
2018 | 35.55 | 36.80 | a | 42.00 | a | 52.03 | 56.08 | 67.75 | 70.72 | b | 67.50 | 63.22 | 48.02 | 38.00 | a | ----- | z | 52.52 | a | |||||||
2019 | ----- | z | 30.71 | g | 42.48 | a | 49.50 | 49.48 | 62.67 | 70.48 | 69.91 | b | 62.91 | b | 48.65 | a | 41.48 | a | 32.88 | a | 53.05 | b | ||||
2020 | 34.42 | 36.74 | 42.02 | 48.77 | 58.47 | 65.82 | 69.95 | 71.81 | 63.73 | d | 54.08 | 44.20 | 30.82 | a | 51.73 | |||||||||||
2021 | 31.57 | b | 41.22 | s | 40.83 | e | 50.47 | k | 56.92 | 68.60 | 73.12 | r | 67.28 | b | 61.58 | 50.00 | 42.88 | j | 37.35 | 51.77 | d | |||||
2022 | 33.23 | 33.30 | a | 40.92 | f | 50.94 | c | 57.55 | 67.02 | 69.88 | a | 65.91 | b | 63.16 | b | 47.57 | c | 36.00 | f | 34.85 | 52.34 | b | ||||
2023 | 30.81 | b | 31.52 | d | 36.94 | d | 46.38 | 53.69 | e | 59.52 | 72.21 | 68.12 | b | 62.28 | e | 51.85 | 40.90 | 34.58 | 49.07 | |||||||
2024 | 32.68 | c | 35.95 | a | 39.22 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.31 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.59 | 35.23 | 39.87 | 46.40 | 54.00 | 63.82 | 68.85 | 66.63 | 60.90 | 50.73 | 39.97 | 32.60 | 48.96 | |||||||||||||
S.D. | 3.28 | 3.70 | 3.43 | 2.74 | 2.54 | 2.94 | 1.63 | 1.88 | 1.96 | 2.42 | 3.11 | 3.22 | 1.35 | |||||||||||||
SKEW | -0.16 | -0.36 | -0.13 | -0.33 | 0.15 | 0.01 | -0.69 | 0.39 | -0.26 | -0.05 | 0.30 | 0.09 | 0.49 | |||||||||||||
MAX | 38.10 | 42.02 | 45.89 | 52.03 | 59.35 | 69.07 | 72.21 | 71.81 | 65.46 | 55.61 | 49.45 | 39.09 | 52.12 | |||||||||||||
MIN | 25.31 | 25.75 | 33.87 | 40.73 | 48.70 | 57.96 | 63.62 | 62.98 | 56.37 | 45.66 | 34.02 | 25.90 | 46.25 | |||||||||||||
YRS | 47 | 47 | 45 | 45 | 51 | 55 | 55 | 57 | 57 | 53 | 48 | 51 | 30 |