YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1973 | ----- | z | ----- | z | 43.97 | 49.35 | 55.32 | 59.50 | 64.08 | 60.97 | 59.95 | 51.16 | 43.70 | 44.24 | 53.22 | b | ||||||||||
1974 | 36.03 | 40.30 | 45.06 | 48.20 | 52.05 | 59.27 | 63.02 | 64.34 | 62.88 | 51.84 | 45.93 | a | 42.48 | 50.95 | ||||||||||||
1975 | 43.03 | a | 41.77 | 42.56 | 44.00 | 53.02 | a | 57.75 | 64.21 | 60.63 | 60.87 | 52.31 | 43.77 | 42.37 | 50.52 | |||||||||||
1976 | 40.50 | 40.45 | 42.92 | a | 46.98 | a | 54.27 | a | 56.48 | 63.32 | 63.08 | 61.11 | c | 52.32 | 46.00 | 37.29 | 50.39 | |||||||||
1977 | 37.60 | 43.93 | 42.81 | 50.88 | b | 50.61 | 60.40 | 62.31 | 68.27 | 58.20 | 52.60 | 44.38 | 43.13 | 51.26 | ||||||||||||
1978 | 41.82 | 45.32 | 48.42 | 48.28 | 52.85 | 61.97 | 64.66 | 64.02 | 58.22 | 52.90 | a | 39.86 | a | ----- | z | 52.57 | a | |||||||||
1979 | 30.19 | 41.68 | 47.37 | 49.26 | a | 55.56 | 61.05 | a | 65.57 | a | 63.73 | a | 62.04 | b | 55.87 | 42.87 | 43.39 | 51.55 | ||||||||
1980 | 36.80 | a | 44.00 | a | 44.50 | a | 50.98 | a | 53.34 | b | 57.17 | a | 64.47 | a | 61.15 | 59.88 | 53.31 | 46.93 | 42.83 | a | 51.28 | |||||
1981 | 40.90 | b | 42.83 | a | 46.19 | 49.91 | a | 54.64 | b | 58.67 | 63.66 | 67.65 | 61.67 | 50.77 | 46.42 | 42.18 | a | 52.12 | ||||||||
1982 | 37.20 | a | 41.71 | 44.48 | a | 46.15 | 53.35 | a | 60.95 | a | 62.95 | 64.52 | 59.10 | 52.35 | 41.55 | 40.16 | 50.37 | |||||||||
1983 | 42.68 | 45.93 | 48.33 | a | 48.83 | 56.13 | a | 57.85 | 61.69 | 64.73 | a | 57.66 | a | 51.35 | 47.63 | 37.50 | b | 51.69 | ||||||||
1984 | ----- | z | 44.66 | d | 48.66 | 47.68 | 52.14 | b | 57.45 | 63.81 | 64.07 | a | 58.88 | a | 49.37 | a | 44.55 | a | ----- | z | 53.13 | b | ||||
1985 | 34.18 | a | 39.30 | 43.05 | 51.24 | a | 54.42 | a | 60.03 | a | 68.05 | 63.53 | a | 56.27 | b | 50.50 | 36.27 | 33.58 | 49.20 | |||||||
1986 | 42.73 | a | 43.48 | 50.39 | c | 47.33 | 55.16 | 62.65 | 61.28 | b | 67.69 | 56.98 | 52.84 | 45.77 | ----- | z | 53.30 | a | ||||||||
1987 | 39.32 | a | 43.86 | 47.27 | 51.73 | 57.05 | 62.50 | 62.58 | 64.84 | 60.63 | 55.34 | 45.67 | 38.15 | 52.41 | ||||||||||||
1988 | 38.34 | 42.66 | 45.58 | 49.97 | 53.34 | 58.78 | a | 65.00 | 63.76 | 60.68 | b | 55.65 | 45.30 | 39.29 | 51.53 | |||||||||||
1989 | 40.92 | a | 34.50 | 44.71 | 53.30 | 54.66 | 61.00 | 62.13 | 62.79 | 61.19 | a | 51.55 | 45.47 | a | 38.31 | 50.88 | ||||||||||
1990 | 40.97 | a | 40.07 | 47.37 | 51.83 | 53.28 | b | 60.43 | a | 66.74 | b | 65.52 | e | 63.18 | b | 49.72 | a | 45.87 | 33.12 | a | 51.51 | |||||
1991 | 37.69 | 47.04 | a | 42.94 | 47.97 | 51.34 | 55.78 | a | 65.62 | a | 65.68 | a | 62.85 | 54.08 | a | 46.46 | c | 39.97 | a | 51.45 | ||||||
1992 | 42.79 | 47.10 | 49.74 | 52.63 | 58.55 | 63.59 | a | 65.53 | 66.06 | 60.03 | 54.06 | 44.27 | 38.29 | 53.55 | ||||||||||||
1993 | 34.74 | 38.40 | b | 47.60 | 48.92 | 57.06 | 58.67 | 60.87 | 64.21 | 61.60 | 55.10 | 38.03 | 37.89 | 50.26 | ||||||||||||
1994 | 41.74 | 40.20 | 47.71 | 50.47 | 56.00 | 58.17 | 66.55 | b | 64.52 | a | 63.63 | 50.48 | c | 39.18 | 40.98 | b | 51.64 | |||||||||
1995 | 42.05 | b | 44.61 | a | 45.71 | 47.92 | 56.31 | 60.13 | c | 66.52 | c | 62.80 | a | 63.17 | 51.08 | 49.09 | a | 40.78 | b | 52.51 | ||||||
1996 | 41.34 | 41.10 | 45.58 | a | 51.00 | 52.28 | a | 59.30 | e | 68.11 | 65.38 | a | 58.52 | a | 51.47 | 44.85 | 41.73 | 51.72 | ||||||||
1997 | 40.25 | a | 41.71 | 44.72 | a | 47.88 | 58.97 | 58.93 | a | 64.63 | a | 67.12 | a | 61.92 | 50.95 | 47.37 | 38.33 | a | 51.90 | |||||||
1998 | 44.56 | 45.50 | 46.42 | 49.34 | a | 53.44 | 59.78 | 67.41 | b | 66.16 | b | 63.03 | 51.48 | 46.74 | c | 38.95 | 52.74 | |||||||||
1999 | 40.79 | 42.46 | b | 43.37 | a | 47.26 | a | 51.11 | 57.88 | a | 62.67 | b | 67.08 | a | 60.46 | b | 52.98 | b | 48.45 | b | 41.05 | 51.30 | ||||
2000 | 38.95 | a | 43.45 | a | 43.38 | a | 50.57 | 54.61 | d | 61.13 | c | 64.06 | 63.94 | 60.25 | 52.43 | a | 40.67 | 40.25 | a | 51.14 | ||||||
2001 | 39.31 | 40.77 | 45.73 | a | 46.88 | a | 55.60 | 56.43 | 63.60 | a | 64.81 | b | 60.79 | a | 51.63 | a | 47.43 | 40.15 | a | 51.09 | ||||||
2002 | 40.24 | 42.62 | d | 42.50 | 49.28 | 52.52 | a | 60.35 | 66.09 | b | 64.12 | a | 61.21 | a | 50.45 | a | 45.76 | a | 42.63 | 51.48 | ||||||
2003 | 43.95 | a | 42.13 | a | 46.58 | a | 47.50 | 53.53 | 62.20 | 67.97 | a | 66.19 | 62.34 | b | 55.77 | 41.36 | b | 42.16 | b | 52.64 | ||||||
2004 | 40.74 | b | 43.04 | b | 48.33 | a | 51.09 | a | 55.68 | 60.70 | 67.45 | c | 68.05 | 59.11 | b | 53.40 | 42.80 | b | 40.64 | b | 52.59 | |||||
2005 | 40.89 | 40.27 | 47.78 | a | 49.07 | b | 56.50 | 57.47 | a | 66.18 | 66.60 | b | 58.22 | e | 52.73 | a | 41.16 | a | 37.18 | a | 51.17 | |||||
2006 | 43.00 | a | 39.71 | b | 43.15 | 49.24 | a | 55.47 | a | 61.50 | 66.67 | b | 63.32 | a | 60.19 | a | 49.48 | b | 43.52 | e | 38.79 | c | 51.17 | |||
2007 | 35.47 | b | 42.25 | d | 48.48 | c | 49.23 | 54.84 | 59.04 | d | 67.19 | b | 64.56 | d | 58.35 | g | 50.04 | g | 42.41 | g | 39.62 | k | 52.63 | d | ||
2008 | 35.11 | i | 42.16 | d | 42.23 | e | 44.79 | d | 55.54 | e | 56.93 | c | 65.39 | c | 65.58 | e | 60.33 | d | 50.57 | a | 46.12 | 37.40 | 51.55 | a | ||
2009 | 38.47 | a | 40.59 | 42.61 | 47.92 | 55.05 | a | 61.70 | 67.89 | 65.45 | 61.62 | b | 50.98 | a | 45.22 | a | 35.02 | 51.04 | ||||||||
2010 | 45.29 | 44.54 | a | 45.34 | b | 47.63 | 52.33 | b | 57.27 | b | 64.65 | a | 63.24 | d | 60.73 | b | 51.79 | 44.12 | a | 42.97 | 51.66 | |||||
2011 | 40.76 | 39.00 | 44.92 | a | 44.93 | a | 50.14 | b | 57.32 | 61.71 | 64.95 | 63.52 | b | 52.32 | c | 43.00 | 35.74 | d | 49.86 | |||||||
2012 | 39.48 | 41.45 | a | 42.27 | a | 49.17 | a | 52.65 | d | 57.34 | a | 63.37 | a | 65.62 | a | 60.52 | b | 53.18 | a | 46.62 | 41.43 | a | 51.09 | |||
2013 | 35.44 | 41.34 | 45.85 | a | 49.53 | a | 55.52 | 60.64 | e | 66.62 | b | 66.05 | a | 61.25 | 48.23 | a | 42.62 | 33.13 | a | 50.52 | ||||||
2014 | 38.27 | a | 40.24 | a | 47.15 | 50.22 | 56.40 | 58.79 | b | 67.66 | 68.48 | b | 62.70 | b | 57.11 | 44.67 | 42.63 | a | 52.86 | |||||||
2015 | 41.11 | c | 45.85 | a | 48.76 | 47.72 | a | 55.90 | e | 65.84 | e | 68.93 | b | 67.34 | f | 59.56 | c | 56.13 | 43.77 | b | 42.37 | 52.36 | a | |||
2016 | 42.16 | 46.35 | b | 47.58 | 54.06 | c | 57.26 | 61.28 | a | 63.98 | 67.02 | a | 59.08 | 53.21 | 49.60 | a | 35.63 | a | 53.10 | |||||||
2017 | 34.43 | b | 41.89 | 46.05 | 48.97 | 56.29 | 62.03 | 65.82 | 68.20 | a | 62.88 | 51.16 | 45.57 | c | 37.13 | 51.70 | ||||||||||
2018 | 43.00 | 40.23 | 43.20 | a | 49.10 | a | 56.84 | b | 59.88 | b | 67.12 | f | 66.15 | a | 58.12 | 52.35 | a | 44.25 | 40.60 | a | 50.34 | a | ||||
2019 | 39.82 | a | 36.63 | a | 41.84 | 49.90 | a | 56.47 | b | 60.52 | 64.34 | 66.47 | a | 60.28 | 47.29 | 42.42 | 39.75 | a | 50.48 | |||||||
2020 | 43.92 | 41.17 | 42.78 | a | 49.27 | 55.55 | 59.58 | 65.18 | a | 65.71 | 62.66 | a | 52.02 | 43.17 | a | 40.43 | a | 51.79 | ||||||||
2021 | 42.19 | 41.59 | a | 42.67 | b | 49.25 | 54.82 | 64.98 | 67.50 | 67.42 | 60.20 | 50.68 | 46.23 | b | 40.14 | c | 52.31 | |||||||||
2022 | 38.97 | 40.16 | c | 46.28 | a | 44.58 | 51.77 | 59.40 | 67.61 | c | 68.68 | 63.63 | 56.45 | 39.17 | 38.65 | 51.28 | ||||||||||
2023 | 40.87 | 38.61 | 40.50 | 47.00 | 58.43 | b | 60.61 | b | 67.38 | b | 69.03 | 60.47 | 52.82 | a | 44.19 | a | 43.80 | a | 51.98 | |||||||
2024 | 40.90 | 43.71 | 45.08 | 47.86 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.23 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.93 | 42.05 | 45.36 | 48.95 | 54.63 | 59.78 | 65.09 | 65.28 | 60.68 | 52.31 | 44.32 | 39.67 | 51.48 | |||||||||||||
S.D. | 3.05 | 2.56 | 2.36 | 2.11 | 2.08 | 2.15 | 2.09 | 2.00 | 1.82 | 2.09 | 2.80 | 2.84 | 0.89 | |||||||||||||
SKEW | -0.86 | -0.23 | 0.10 | -0.08 | -0.13 | 0.49 | -0.14 | -0.19 | -0.28 | 0.27 | -0.71 | -0.58 | -0.01 | |||||||||||||
MAX | 45.29 | 47.10 | 50.39 | 54.06 | 58.97 | 65.84 | 68.93 | 69.03 | 63.63 | 57.11 | 49.60 | 44.24 | 53.55 | |||||||||||||
MIN | 30.19 | 34.50 | 40.50 | 44.00 | 50.14 | 55.78 | 60.87 | 60.63 | 56.27 | 47.29 | 36.27 | 33.12 | 49.20 | |||||||||||||
YRS | 49 | 51 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 47 | 43 |