YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1971 | ----- | z | ----- | z | ----- | z | ----- | z | 51.23 | t | 55.25 | 57.13 | 61.66 | b | 59.57 | 52.50 | 47.80 | 41.38 | a | 53.61 | e | |||||
1972 | 40.52 | b | 45.95 | 47.80 | a | 46.59 | b | 53.03 | 57.35 | 60.77 | a | 60.87 | 57.80 | 52.95 | 49.09 | a | 39.79 | b | 51.04 | |||||||
1973 | 41.77 | c | 48.62 | 46.05 | 50.28 | 53.39 | 57.48 | 59.10 | 58.34 | 60.39 | b | 53.76 | 46.48 | b | 46.71 | 51.86 | ||||||||||
1974 | 40.90 | 44.32 | 47.35 | 49.45 | 52.42 | 55.93 | 59.79 | 60.60 | 60.62 | 54.58 | 49.37 | 45.15 | 51.71 | |||||||||||||
1975 | 44.85 | 44.68 | 45.94 | 45.97 | 53.39 | 55.97 | a | 59.97 | 58.97 | 59.95 | 53.40 | b | 46.52 | 45.05 | a | 51.22 | ||||||||||
1976 | 44.55 | 43.21 | 45.39 | 47.71 | a | 53.23 | 55.44 | c | 60.87 | 61.02 | 61.43 | 56.24 | 51.33 | 44.24 | 52.05 | |||||||||||
1977 | 44.63 | 49.89 | a | 45.85 | 51.23 | 51.84 | 57.73 | 59.77 | 62.23 | 58.78 | 55.69 | 47.35 | 46.87 | 52.66 | ||||||||||||
1978 | 46.65 | a | 47.02 | 49.47 | 49.72 | 53.63 | a | 58.74 | a | 59.58 | 60.18 | 58.78 | 55.08 | a | 43.33 | 38.19 | 51.70 | |||||||||
1979 | 37.84 | 43.80 | 48.10 | 49.58 | 53.85 | 55.75 | 61.19 | 61.29 | 62.53 | 56.15 | a | 47.32 | 47.48 | d | 52.07 | |||||||||||
1980 | 41.29 | 47.71 | 45.81 | 49.62 | b | 52.68 | 56.32 | 59.34 | 56.79 | 57.98 | 54.97 | 49.82 | 47.02 | 51.61 | ||||||||||||
1981 | 48.29 | 46.96 | 47.53 | a | 50.18 | 53.53 | a | 58.02 | 58.74 | 60.15 | 58.15 | 52.37 | a | 48.07 | a | 46.16 | 52.35 | |||||||||
1982 | 40.69 | 43.93 | 44.63 | 46.40 | a | 51.48 | a | 55.36 | a | 58.53 | 59.00 | 58.80 | 55.40 | a | 46.78 | a | 44.33 | a | 50.44 | |||||||
1983 | 47.06 | 48.63 | a | 50.52 | 50.28 | a | 54.70 | a | 57.56 | c | 61.15 | a | 61.18 | 59.50 | a | 54.73 | 49.12 | b | 42.98 | b | 53.12 | |||||
1984 | 45.53 | 47.40 | 49.90 | 48.98 | 53.18 | 55.10 | 57.45 | 60.89 | 59.43 | a | 52.65 | 47.36 | b | 41.19 | 51.59 | |||||||||||
1985 | 43.18 | 42.94 | b | 43.95 | 49.55 | 53.37 | 56.96 | b | 59.81 | 59.53 | 56.86 | a | 52.27 | 41.74 | a | 42.55 | 50.23 | |||||||||
1986 | 47.79 | 47.44 | a | 51.33 | a | 48.53 | a | 52.83 | a | 58.05 | a | 58.78 | d | 58.29 | 55.72 | 53.88 | a | 49.17 | 44.65 | 52.21 | ||||||
1987 | 44.60 | 46.62 | 49.00 | 51.57 | 55.62 | a | 56.58 | 58.55 | 58.82 | 57.57 | c | 56.00 | 49.97 | 42.62 | c | 52.29 | ||||||||||
1988 | 43.20 | a | 47.00 | 46.77 | a | 50.25 | 53.45 | a | 56.33 | 59.33 | a | 57.94 | 58.30 | b | 56.68 | 48.61 | b | 44.60 | 51.87 | |||||||
1989 | 43.74 | b | 40.14 | 47.36 | c | 54.00 | 54.19 | b | 58.26 | c | 60.35 | 60.91 | c | 59.09 | b | 53.52 | a | 49.04 | b | 45.42 | a | 52.17 | ||||
1990 | 45.60 | b | 44.28 | a | 49.27 | a | 51.91 | a | 53.30 | d | 58.07 | b | 60.66 | b | 62.06 | 61.98 | a | 53.16 | 48.73 | b | 38.30 | c | 52.28 | |||
1991 | 42.91 | b | 50.85 | d | 46.28 | d | 49.08 | d | 52.04 | g | 55.98 | f | 60.19 | b | 61.60 | b | 63.06 | e | 56.34 | i | 49.45 | h | 45.14 | c | 52.39 | d |
1992 | 46.52 | f | 51.32 | a | 51.64 | b | 54.58 | d | 56.50 | j | 59.70 | j | 62.12 | a | 62.02 | c | 58.91 | g | 55.76 | b | 48.66 | a | 42.86 | f | 55.15 | e |
1993 | 41.52 | d | 45.08 | b | 50.44 | e | 51.63 | c | 57.24 | 59.24 | e | 59.87 | d | 61.75 | g | 58.22 | a | 55.70 | d | 44.52 | d | 44.46 | d | 51.63 | a | |
1994 | 46.73 | c | 44.41 | 49.28 | b | 52.07 | h | 55.69 | e | 56.96 | e | 59.56 | e | 63.62 | c | 61.71 | f | 53.31 | d | 43.38 | i | 43.02 | h | 53.70 | d | |
1995 | 47.73 | a | 48.83 | d | 48.61 | c | 51.36 | e | 55.19 | m | 57.26 | k | 62.39 | h | 61.75 | q | 62.47 | m | 53.90 | g | 51.14 | e | 48.62 | r | 49.53 | g |
1996 | 44.67 | g | 48.19 | h | 49.35 | g | 51.14 | s | 54.33 | y | 58.05 | i | 60.89 | h | 60.63 | p | 59.93 | h | 53.89 | c | 49.24 | g | 45.60 | f | 53.89 | k |
1997 | 44.42 | g | 47.23 | f | 48.52 | f | 51.23 | f | 60.76 | j | 65.23 | s | 64.61 | l | 64.97 | n | 63.76 | i | 55.00 | d | 51.83 | l | 45.72 | m | 55.00 | k |
1998 | 47.73 | p | 47.07 | f | 48.14 | i | 49.80 | g | 54.59 | n | 60.83 | j | 65.61 | q | 64.77 | t | ----- | z | 53.98 | d | 47.85 | d | 41.87 | h | 50.91 | j |
1999 | 42.58 | g | 43.93 | n | 45.83 | e | 48.79 | p | 51.23 | p | 57.54 | f | 57.38 | c | 61.45 | k | 57.53 | k | 50.80 | f | 50.17 | i | 45.14 | m | 51.60 | j |
2000 | 41.23 | k | 47.45 | j | 44.61 | h | 48.95 | i | 53.70 | c | 56.95 | i | 56.72 | o | 56.75 | o | 58.62 | j | 52.90 | g | 45.58 | q | 44.41 | h | 53.70 | k |
2001 | 44.56 | d | 42.60 | g | 45.39 | c | 45.84 | e | 54.12 | j | 50.58 | j | 55.85 | h | 57.67 | j | 57.08 | l | 51.76 | f | 49.34 | e | 44.40 | e | 45.91 | g |
2002 | 41.80 | h | 38.42 | i | 44.32 | c | 49.37 | d | 52.30 | f | 56.84 | k | 61.28 | h | 59.67 | j | 58.55 | k | 52.19 | g | 50.85 | f | 47.58 | g | 46.84 | j |
2003 | 49.16 | i | 45.52 | f | 50.45 | j | 49.89 | h | 53.21 | e | 58.20 | h | 61.66 | i | 62.26 | j | 60.04 | f | 56.25 | k | 46.04 | f | 45.09 | d | 49.15 | j |
2004 | 46.46 | e | 46.62 | c | 49.48 | h | 53.44 | f | 56.23 | i | 59.32 | m | 64.03 | m | 64.46 | f | 60.20 | j | 54.92 | a | 47.46 | d | 46.00 | g | 48.86 | h |
2005 | 45.25 | g | 46.86 | g | 50.36 | j | 50.43 | h | 57.25 | g | 59.22 | l | 61.67 | h | 57.79 | b | 54.52 | 52.88 | k | 45.54 | b | 44.11 | c | 50.49 | h | |
2006 | 45.31 | 43.63 | a | 43.94 | d | 48.66 | k | ----- | z | 58.57 | a | ----- | z | 55.90 | e | 56.00 | c | 50.85 | a | 47.52 | f | 42.98 | g | 50.60 | e | |
2007 | 39.22 | h | 43.88 | c | 46.80 | f | 48.07 | g | 51.23 | e | 55.12 | f | 60.33 | g | 59.80 | h | 56.40 | a | 51.18 | f | 45.44 | c | 44.78 | d | 48.35 | g |
2008 | 39.38 | e | 42.15 | i | 42.61 | d | 46.06 | m | 52.96 | g | 52.57 | c | 56.47 | a | 58.18 | 54.67 | d | 51.45 | 49.77 | 40.00 | 49.46 | c | ||||
2009 | 42.95 | 43.77 | 43.55 | 46.53 | 50.97 | 57.03 | 57.42 | 58.92 | 58.32 | 52.44 | 47.18 | 40.06 | 49.93 | |||||||||||||
2010 | 47.65 | 46.36 | 45.81 | 46.77 | 49.87 | 54.30 | 55.24 | 56.55 | 58.15 | 52.63 | 45.38 | 44.50 | 50.27 | |||||||||||||
2011 | 43.60 | 41.18 | 45.56 | 45.38 | 49.96 | d | 56.03 | 58.39 | 58.89 | 58.85 | 53.81 | 45.18 | 40.45 | 49.77 | ||||||||||||
2012 | 42.88 | b | 43.90 | 42.97 | 48.66 | b | 50.89 | 54.87 | 57.45 | 57.65 | 55.00 | 52.71 | 48.80 | 42.68 | a | 49.87 | ||||||||||
2013 | 40.52 | 43.20 | 45.97 | 49.35 | 53.70 | a | 57.07 | 56.65 | 59.94 | 59.12 | 50.52 | 46.98 | 38.95 | 50.16 | ||||||||||||
2014 | 45.37 | 45.32 | 48.55 | 50.75 | 56.11 | 56.60 | 60.06 | 59.92 | 60.77 | 57.84 | 49.02 | 46.88 | a | 53.10 | ||||||||||||
2015 | 47.77 | 49.50 | 49.83 | a | 48.68 | 52.65 | 56.17 | 61.66 | 60.97 | 57.38 | 56.74 | 45.38 | 44.27 | 52.58 | ||||||||||||
2016 | 44.92 | 47.81 | 47.82 | 52.33 | a | 55.24 | 57.65 | 59.58 | 58.50 | 57.23 | 54.40 | 50.73 | 39.27 | 52.12 | ||||||||||||
2017 | 40.03 | 44.48 | 47.33 | b | 48.67 | 53.59 | d | 57.52 | c | 58.03 | 60.21 | 59.43 | 53.21 | 48.10 | 42.87 | 51.12 | ||||||||||
2018 | 46.76 | 41.96 | 44.15 | 49.80 | 53.52 | 56.52 | c | 58.72 | a | 59.55 | 57.00 | 53.71 | 48.42 | 44.48 | 51.21 | |||||||||||
2019 | 44.61 | 39.43 | 44.30 | a | 53.04 | b | 53.40 | a | 56.74 | a | 61.31 | 62.65 | 59.12 | 50.40 | 45.35 | 44.02 | 51.20 | |||||||||
2020 | 45.69 | 42.72 | 43.08 | 49.33 | 54.55 | 57.25 | 58.56 | 60.23 | 60.73 | 53.18 | 45.98 | b | 44.11 | 51.29 | ||||||||||||
2021 | 44.40 | 43.46 | 43.06 | 48.10 | 52.40 | 58.52 | 58.24 | 58.98 | 58.30 | 51.45 | 49.58 | f | 39.38 | c | 50.57 | a | ||||||||||
2022 | 43.25 | a | 41.46 | a | 46.11 | 45.17 | 49.32 | 56.83 | 59.55 | 60.44 | d | 57.57 | 53.32 | 42.59 | b | 42.16 | 49.82 | |||||||||
2023 | 42.35 | a | 40.65 | a | 41.27 | 46.85 | 52.83 | b | 55.88 | 58.63 | 61.55 | 57.28 | 53.32 | 47.10 | 47.06 | 50.40 | ||||||||||
2024 | 46.26 | 45.83 | 45.31 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.80 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 44.10 | 45.26 | 46.56 | 49.33 | 53.16 | 56.73 | 59.17 | 59.87 | 58.55 | 53.88 | 47.51 | 43.42 | 51.43 | |||||||||||||
S.D. | 2.57 | 2.86 | 2.52 | 2.28 | 1.67 | 1.34 | 1.51 | 1.74 | 1.98 | 1.72 | 2.17 | 2.60 | 0.98 | |||||||||||||
SKEW | -0.37 | 0.11 | 0.12 | 0.15 | -0.11 | -0.65 | -0.33 | -0.20 | 0.10 | 0.07 | -0.61 | -0.48 | -0.24 | |||||||||||||
MAX | 48.29 | 51.32 | 51.64 | 54.58 | 57.24 | 59.24 | 62.12 | 63.62 | 63.06 | 57.84 | 51.33 | 47.48 | 53.12 | |||||||||||||
MIN | 37.84 | 39.43 | 41.27 | 45.17 | 49.32 | 52.57 | 55.24 | 55.90 | 54.52 | 50.40 | 41.74 | 38.19 | 49.77 | |||||||||||||
YRS | 43 | 43 | 45 | 40 | 39 | 39 | 41 | 41 | 41 | 44 | 43 | 42 | 33 |