YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.18 | 64.79 | c | 60.06 | 55.36 | a | 44.79 | b | ----- | z | ----- | z | 56.44 | g | ||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.24 | a | ----- | z | ----- | z | ----- | z | 57.24 | k |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | 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 | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | 33.00 | e | 35.00 | e | 37.62 | e | 43.40 | 53.30 | a | 58.96 | b | 66.26 | b | 66.15 | g | 53.94 | f | 42.58 | r | 30.92 | r | 26.60 | a | 44.27 | d | |
2001 | 26.83 | b | 26.87 | b | 33.58 | e | 39.40 | d | 52.17 | y | 59.90 | d | 67.08 | g | 64.44 | e | 57.93 | 46.73 | c | 38.06 | d | 30.38 | f | 43.75 | c | |
2002 | 26.85 | g | 26.45 | h | 28.69 | e | 43.38 | a | 48.10 | b | 62.03 | a | 67.95 | b | 62.82 | a | 55.61 | c | 39.83 | d | 33.80 | c | 31.67 | a | 47.39 | b |
2003 | 33.95 | c | 25.32 | c | 34.23 | 42.52 | a | 49.48 | b | 55.25 | b | 67.85 | a | 64.69 | b | 52.29 | a | 50.12 | a | 32.95 | b | 32.11 | 45.06 | |||
2004 | 30.69 | 26.40 | 40.37 | 41.13 | 51.15 | a | 55.83 | 62.32 | a | 58.65 | a | 54.95 | a | 44.90 | 34.89 | b | 31.58 | 44.41 | ||||||||
2005 | 33.24 | 29.94 | a | 33.61 | 40.14 | a | 49.32 | a | 57.63 | 67.84 | 62.08 | 56.42 | 45.58 | 38.48 | a | 28.06 | 45.20 | |||||||||
2006 | 32.55 | 27.20 | 32.16 | 44.48 | a | 52.35 | 62.52 | a | 65.63 | 63.34 | 50.93 | 44.87 | a | 37.13 | 28.90 | 45.17 | ||||||||||
2007 | 20.50 | 30.82 | 39.00 | 38.85 | 50.58 | 59.92 | 66.18 | 65.81 | 56.83 | 47.47 | 38.13 | 24.19 | 44.86 | |||||||||||||
2008 | 23.89 | 28.83 | 31.40 | 38.32 | 47.98 | 57.38 | 66.24 | 62.53 | 53.23 | 45.79 | 40.42 | 26.40 | 43.53 | |||||||||||||
2009 | 30.37 | 33.32 | 36.40 | a | 38.47 | 50.60 | a | 55.68 | 62.60 | 60.77 | 53.05 | 37.29 | 37.78 | 21.90 | 43.19 | |||||||||||
2010 | 28.69 | 23.30 | 33.79 | 40.68 | 45.71 | 59.68 | 65.71 | 64.52 | 58.48 | 47.97 | 34.32 | 32.15 | 44.58 | |||||||||||||
2011 | 28.71 | 23.62 | 37.29 | 40.95 | 44.97 | 59.05 | 66.82 | 67.35 | 55.68 | 46.29 | 35.47 | 26.10 | 44.36 | |||||||||||||
2012 | 33.10 | 25.66 | 41.02 | 45.87 | 51.18 | 65.32 | 67.52 | 64.56 | 57.02 | 43.97 | 40.18 | 28.52 | 46.99 | |||||||||||||
2013 | 26.85 | 26.12 | 32.24 | 35.43 | 49.31 | 60.65 | 65.27 | 64.58 | 58.22 | 41.94 | 36.98 | 26.84 | 43.70 | |||||||||||||
2014 | 29.68 | 27.55 | 34.15 | 41.02 | 48.65 | 58.42 | 65.45 | 61.92 | 57.55 | 49.08 | 33.32 | 29.65 | 44.70 | |||||||||||||
2015 | 31.50 | 30.04 | 37.47 | 41.10 | 45.18 | 60.69 | a | 63.45 | 65.02 | 60.60 | 49.87 | 34.22 | 28.32 | 45.62 | ||||||||||||
2016 | 29.85 | 35.20 | a | 35.31 | 41.07 | 46.15 | 62.95 | 67.42 | 61.98 | 56.35 | 50.40 | 40.28 | 27.73 | 46.22 | ||||||||||||
2017 | 25.60 | 34.12 | 40.35 | a | 40.20 | 46.55 | 59.70 | 65.19 | 60.71 | 54.63 | 43.35 | 40.48 | 32.95 | 45.32 | ||||||||||||
2018 | 31.48 | 25.70 | 34.13 | 40.45 | 51.34 | 61.34 | a | 64.37 | 61.95 | 58.30 | b | 41.90 | a | 33.53 | 28.24 | 44.40 | ||||||||||
2019 | 28.23 | a | 28.62 | 33.71 | 43.60 | 42.47 | b | 53.35 | t | 65.81 | r | 64.22 | b | 58.93 | 36.97 | b | 34.88 | 31.82 | 40.35 | b | ||||||
2020 | 30.77 | 24.48 | 35.52 | 39.17 | a | 50.44 | 60.28 | 65.71 | 65.61 | 55.32 | 44.00 | 38.58 | 29.66 | 44.96 | ||||||||||||
2021 | 28.65 | 23.16 | 33.90 | 40.12 | 49.34 | 61.60 | 66.00 | 64.18 | 58.55 | 45.89 | 40.23 | 34.74 | 45.53 | |||||||||||||
2022 | 28.81 | 24.57 | 35.24 | 41.77 | 49.63 | 60.30 | 67.77 | 65.52 | 56.94 | e | 45.10 | 30.42 | 28.73 | 44.57 | ||||||||||||
2023 | 25.34 | 27.54 | 28.21 | 38.17 | 49.15 | 54.77 | 63.56 | 64.13 | 56.55 | 45.31 | 36.35 | g | 31.81 | 44.05 | a | |||||||||||
2024 | 25.63 | a | 30.32 | a | 33.37 | 40.52 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.78 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.08 | 28.07 | 34.91 | 40.82 | 48.82 | 59.46 | 65.73 | 63.39 | 56.28 | 44.98 | 36.57 | 29.07 | 44.86 | |||||||||||||
S.D. | 3.32 | 3.64 | 3.28 | 2.30 | 2.63 | 2.61 | 1.66 | 2.07 | 2.25 | 3.56 | 2.93 | 3.03 | 0.90 | |||||||||||||
SKEW | -0.65 | 0.59 | 0.04 | 0.07 | -0.59 | 0.01 | -0.47 | -0.41 | -0.53 | -0.62 | -0.21 | -0.32 | 0.32 | |||||||||||||
MAX | 33.95 | 35.20 | 41.02 | 45.87 | 53.30 | 65.32 | 67.95 | 67.35 | 60.60 | 50.40 | 40.48 | 34.74 | 46.99 | |||||||||||||
MIN | 20.50 | 23.16 | 28.21 | 35.43 | 42.47 | 54.77 | 62.32 | 58.65 | 50.93 | 36.97 | 30.42 | 21.90 | 43.19 | |||||||||||||
YRS | 24 | 24 | 25 | 24 | 23 | 24 | 23 | 24 | 25 | 24 | 22 | 23 | 19 |