YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.95 | s | 56.84 | 58.26 | 55.08 | 44.95 | 35.65 | 28.72 | b | 46.58 | f | |||||
1975 | 29.29 | 26.39 | a | 29.55 | 31.12 | a | 41.95 | 49.18 | 58.66 | 52.63 | 54.03 | 41.00 | 29.68 | 28.62 | a | 39.34 | ||||||||||
1976 | 27.57 | a | 27.89 | a | 30.42 | 34.98 | 44.18 | a | 47.67 | a | 58.27 | a | 55.18 | 53.23 | 43.03 | 37.73 | 29.18 | a | 40.78 | |||||||
1977 | 24.61 | 33.48 | 29.65 | 39.70 | 38.68 | 53.42 | 55.77 | 61.73 | a | 49.08 | d | ----- | z | ----- | z | ----- | z | 42.90 | c | |||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.11 | ----- | z | ----- | z | 45.11 | k | |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.15 | m | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.39 | 51.35 | 50.47 | 44.27 | 34.79 | b | 31.14 | b | 44.90 | f | ||||
1981 | 31.05 | a | 30.73 | b | 35.13 | a | 39.05 | 40.47 | 51.44 | e | 56.46 | f | 61.44 | e | 53.44 | c | 40.00 | k | 35.65 | d | 30.22 | b | 40.86 | b | ||
1982 | 23.55 | i | 24.92 | c | 31.61 | i | 32.48 | b | 43.07 | a | 50.45 | 56.78 | a | 58.15 | d | 47.11 | g | ----- | z | 28.68 | e | 24.67 | g | 42.08 | e | |
1983 | 29.40 | f | ----- | z | 31.78 | v | 34.93 | 45.15 | a | 48.53 | k | ----- | z | ----- | z | 46.28 | u | 44.67 | d | ----- | z | ----- | z | 41.58 | i | |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | 44.61 | m | 48.16 | e | 59.15 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.16 | k |
1985 | 26.12 | n | 26.17 | g | 31.44 | g | 43.46 | q | ----- | 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 | 34.33 | f | 27.63 | h | ----- | z |
1988 | 26.38 | g | 32.44 | k | 34.23 | k | 41.30 | o | 43.98 | k | 51.63 | o | 58.05 | k | 57.91 | i | 54.61 | h | 52.65 | k | 32.40 | f | 28.67 | h | ----- | z |
1989 | 27.11 | m | 22.28 | j | 32.80 | k | 39.46 | r | 43.20 | i | 49.61 | l | 56.11 | m | 56.61 | h | 53.77 | o | 47.59 | t | 35.58 | l | 31.16 | f | ----- | z |
1990 | 30.81 | g | 28.02 | d | ----- | z | 44.18 | s | 48.21 | x | ----- | z | 63.65 | k | ----- | z | 61.50 | t | ----- | z | 35.78 | g | 21.73 | i | 28.02 | k |
1991 | 28.81 | g | 37.60 | d | 32.71 | e | 36.54 | r | 43.82 | n | ----- | z | 60.67 | s | 63.00 | l | 56.95 | k | 48.98 | e | 36.64 | e | 30.07 | j | 38.98 | h |
1992 | 30.60 | f | 35.50 | d | ----- | z | 44.48 | j | 54.50 | p | 56.93 | p | 58.82 | i | 59.25 | g | 54.56 | f | 47.31 | j | 34.05 | j | 25.63 | 30.56 | j | |
1993 | 22.70 | h | 24.67 | a | 35.56 | g | 38.58 | r | 45.64 | f | 50.84 | b | 53.22 | b | 57.93 | c | 54.74 | a | 48.21 | 30.63 | 28.00 | b | 43.53 | d | ||
1994 | 30.66 | c | 29.00 | e | 34.69 | e | 39.65 | f | 48.00 | e | 53.91 | a | 64.06 | 57.44 | f | 57.12 | i | 43.59 | h | 24.97 | k | 26.72 | h | 43.39 | f | |
1995 | 30.17 | e | 35.48 | c | 31.79 | 36.86 | l | 43.27 | r | 48.19 | f | 58.53 | o | ----- | z | 52.97 | n | 42.74 | f | 37.79 | b | 29.09 | h | 33.81 | h | |
1996 | 29.50 | b | 27.89 | f | 33.93 | b | 37.27 | s | 40.30 | p | 52.92 | x | 61.17 | g | 60.90 | e | ----- | z | ----- | z | 34.03 | o | 28.43 | d | 38.19 | h |
1997 | 25.89 | i | 29.62 | g | 33.09 | n | ----- | z | 51.75 | o | 49.75 | d | 57.80 | k | 61.52 | 51.52 | d | 41.11 | c | 35.79 | d | 26.52 | 44.37 | f | ||
1998 | 31.95 | 30.59 | a | 32.46 | c | 37.37 | c | 41.32 | 51.77 | 63.13 | 61.18 | a | 54.69 | a | 40.84 | b | 33.63 | 25.73 | 42.06 | |||||||
1999 | 28.74 | 27.59 | a | 30.65 | 35.19 | a | 41.18 | 50.78 | 57.07 | a | 57.90 | b | 51.12 | 44.62 | b | 38.82 | 29.23 | 41.07 | ||||||||
2000 | 27.24 | b | 30.35 | e | 32.02 | b | 40.57 | a | 43.32 | a | 53.00 | 55.74 | b | 58.93 | a | 52.15 | c | 42.52 | 29.78 | a | 28.93 | b | 41.21 | |||
2001 | 26.35 | a | 28.13 | a | 34.82 | 34.96 | e | 48.98 | b | 48.45 | b | 56.19 | 59.52 | 53.19 | a | 43.31 | d | 35.13 | c | 27.89 | c | 41.41 | ||||
2002 | 25.54 | d | 28.42 | c | 30.63 | a | 37.78 | a | 43.07 | a | 52.90 | 60.69 | 55.15 | a | 53.11 | b | 40.12 | c | 35.62 | a | 31.17 | a | 41.18 | |||
2003 | 32.63 | a | 29.28 | a | 34.78 | a | 35.62 | 43.98 | b | 54.67 | a | 61.45 | 58.74 | 54.13 | 45.58 | 28.72 | a | 29.59 | b | 42.43 | ||||||
2004 | 29.02 | a | 29.36 | 36.84 | 39.73 | 44.03 | b | 52.38 | 59.58 | 59.90 | 49.55 | 42.86 | b | 34.17 | 31.05 | a | 42.37 | |||||||||
2005 | 29.05 | b | 31.09 | 36.60 | b | 37.31 | c | 45.33 | a | 47.53 | a | 60.69 | b | 59.48 | e | 50.54 | c | 43.75 | e | 32.81 | c | 26.31 | e | 41.71 | ||
2006 | 31.26 | h | 26.14 | c | 28.56 | 37.50 | k | 47.02 | 54.15 | g | 62.04 | c | 56.50 | b | 52.69 | c | 42.79 | e | 33.07 | a | 24.17 | s | 43.60 | d | ||
2007 | 24.85 | r | 30.50 | b | 37.45 | c | 38.24 | c | 48.06 | 50.16 | a | 62.47 | b | 58.38 | c | 50.73 | b | 39.69 | b | 35.68 | e | 24.98 | f | 45.13 | b | |
2008 | 24.42 | g | 28.07 | g | 30.30 | c | 32.55 | a | 47.45 | i | 54.30 | y | ----- | z | 58.47 | 51.18 | b | 43.69 | e | 36.28 | a | 26.73 | e | 39.89 | e | |
2009 | 27.80 | d | 29.54 | b | 29.76 | j | 35.72 | c | 46.83 | g | 52.56 | e | 61.11 | c | 58.73 | g | 55.90 | j | 41.62 | j | 32.94 | d | 25.21 | g | 39.94 | f |
2010 | 32.18 | f | 31.90 | h | 34.05 | a | 35.79 | d | 40.21 | 49.25 | b | 59.39 | 56.95 | 51.25 | 44.66 | b | 31.69 | d | 29.14 | c | 43.24 | b | ||||
2011 | 28.69 | 27.95 | 31.66 | 32.85 | 39.97 | 48.26 | a | 55.31 | 59.40 | 54.85 | 44.10 | 32.57 | 28.27 | 40.32 | ||||||||||||
2012 | 29.44 | 28.79 | 30.66 | 38.73 | 45.18 | 49.07 | a | 60.45 | 60.45 | 54.90 | 43.65 | 35.70 | 27.61 | 42.05 | ||||||||||||
2013 | 25.47 | 29.50 | 34.35 | 39.93 | a | 46.69 | 53.50 | a | 62.57 | b | 59.58 | 52.75 | 40.68 | 35.20 | 26.18 | 42.20 | ||||||||||
2014 | 33.29 | 31.00 | 36.13 | 39.14 | a | 48.44 | 51.25 | 62.95 | a | 59.81 | 56.05 | h | 45.73 | e | 32.36 | h | 33.02 | a | 44.07 | b | ||||||
2015 | 34.28 | b | 36.89 | 39.74 | 38.26 | a | 46.78 | f | 58.93 | c | 60.93 | c | 60.18 | 51.22 | 48.19 | 33.74 | e | 29.80 | i | 46.24 | b | |||||
2016 | 27.25 | e | 33.17 | c | 33.47 | 43.07 | a | 47.26 | b | 52.57 | a | 57.05 | 58.95 | i | 49.07 | h | 41.27 | a | 37.43 | 20.54 | c | 39.31 | b | |||
2017 | 21.03 | a | 29.04 | c | 33.72 | a | 35.55 | b | 47.21 | g | 54.26 | g | 61.53 | m | ----- | z | 55.25 | d | 41.10 | a | 32.62 | a | 27.42 | 34.47 | d | |
2018 | 32.91 | b | 27.43 | 31.18 | a | 38.55 | 49.77 | a | 52.31 | c | 61.10 | b | 59.63 | 49.23 | d | 43.02 | a | 34.75 | b | 27.19 | 42.26 | |||||
2019 | 30.27 | c | 22.91 | 29.67 | a | 38.30 | b | 45.77 | 52.91 | a | 56.08 | r | 59.84 | c | 51.69 | c | 38.28 | a | 35.15 | 29.17 | a | 39.45 | a | |||
2020 | 30.53 | a | 30.05 | a | 32.09 | b | 39.84 | a | 46.80 | f | 51.75 | b | 57.64 | f | 60.57 | a | 55.72 | a | 45.21 | 30.69 | c | 27.58 | a | 40.40 | b | |
2021 | 28.87 | a | 28.00 | b | 31.48 | b | 40.12 | b | 44.55 | a | 57.75 | b | 62.57 | h | 57.46 | f | 51.90 | a | 41.26 | 35.57 | c | 28.56 | e | 38.81 | b | |
2022 | 29.03 | b | 31.38 | k | 35.58 | g | 33.55 | a | 39.18 | i | 51.53 | ----- | z | 63.54 | f | 57.02 | e | 48.06 | n | 27.71 | m | 25.98 | f | 42.78 | h | |
2023 | 25.52 | 25.79 | 24.98 | 34.31 | a | 47.52 | d | 52.81 | f | 60.28 | o | 56.06 | f | 51.24 | g | 44.06 | d | 34.48 | b | 29.65 | d | 33.29 | d | |||
2024 | 28.35 | e | 30.83 | f | 31.60 | u | 39.21 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.35 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.87 | 29.56 | 32.69 | 36.95 | 44.56 | 51.55 | 59.29 | 58.65 | 52.68 | 43.40 | 34.10 | 28.25 | 41.46 | |||||||||||||
S.D. | 2.83 | 3.37 | 2.99 | 2.85 | 3.05 | 2.66 | 2.86 | 2.47 | 2.07 | 2.47 | 2.63 | 2.26 | 0.89 | |||||||||||||
SKEW | -0.44 | 0.62 | 0.01 | -0.14 | -0.15 | 0.77 | -0.22 | -1.35 | 0.09 | 0.26 | -0.49 | -0.98 | -0.94 | |||||||||||||
MAX | 34.28 | 37.60 | 39.74 | 43.07 | 49.77 | 58.93 | 64.06 | 61.73 | 57.02 | 48.98 | 38.82 | 33.02 | 42.43 | |||||||||||||
MIN | 21.03 | 22.91 | 24.98 | 31.12 | 38.68 | 47.53 | 53.22 | 51.35 | 49.08 | 38.28 | 28.68 | 20.54 | 39.34 | |||||||||||||
YRS | 30 | 34 | 32 | 31 | 27 | 31 | 27 | 30 | 30 | 33 | 34 | 30 | 14 |