YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1961 | ----- | z | 32.05 | h | 30.56 | d | 34.69 | a | 40.74 | 48.87 | 50.16 | 52.45 | 38.40 | 31.55 | 21.28 | a | 23.35 | 37.20 | b | |||||||
1962 | 14.63 | a | 25.36 | 27.62 | b | 34.37 | 39.52 | 42.20 | 46.68 | 46.23 | 39.53 | 33.06 | 28.93 | b | 22.90 | a | 33.42 | |||||||||
1963 | 13.68 | c | 29.52 | a | 27.71 | 32.93 | 40.87 | 46.47 | k | 44.81 | 46.59 | d | 45.34 | a | 36.07 | a | 29.70 | 22.39 | 33.60 | a | ||||||
1964 | 24.17 | a | 22.52 | 25.23 | 29.73 | 35.77 | ----- | z | 49.35 | ----- | z | 36.97 | 33.23 | 27.77 | 24.75 | c | 30.95 | b | ||||||||
1965 | 26.42 | 27.81 | a | 23.32 | 36.10 | 36.61 | ----- | z | 49.03 | 49.87 | 36.20 | 33.00 | 30.87 | 19.74 | 33.54 | a | ||||||||||
1966 | 23.61 | 25.32 | 27.32 | 32.13 | 38.58 | 44.83 | 48.70 | a | 46.84 | 44.10 | 31.93 | a | 32.90 | 27.77 | 35.34 | |||||||||||
1967 | 29.06 | 26.61 | 28.46 | c | 30.59 | a | 38.97 | 47.03 | 49.42 | 49.03 | b | 44.37 | 34.31 | b | 31.50 | 22.13 | 35.96 | |||||||||
1968 | 23.71 | 32.31 | 32.35 | 31.33 | 40.40 | a | 47.97 | 50.97 | b | 49.59 | b | 41.93 | 31.87 | 30.63 | 26.63 | a | 36.64 | |||||||||
1969 | 18.68 | 24.00 | 27.81 | 33.30 | 42.06 | 51.30 | 48.29 | 45.00 | 42.80 | 31.10 | 25.13 | 26.00 | b | 34.62 | ||||||||||||
1970 | 27.38 | b | 27.96 | 28.90 | a | 29.93 | a | 38.84 | 51.13 | 51.26 | 46.81 | 39.14 | a | 30.84 | 30.37 | 22.16 | 35.39 | |||||||||
1971 | 25.06 | 25.43 | 27.17 | a | 33.38 | a | 39.55 | 43.53 | 49.39 | 51.87 | 37.23 | 29.87 | 28.03 | a | 22.55 | 34.42 | ||||||||||
1972 | 21.87 | 25.41 | 32.52 | 31.13 | 40.06 | 47.10 | 48.42 | 48.13 | 38.03 | 31.10 | 29.77 | 16.03 | 34.13 | |||||||||||||
1973 | 19.27 | a | 28.00 | 29.61 | 32.13 | 41.00 | 44.73 | 48.13 | 45.74 | 43.47 | 33.42 | 34.30 | 30.16 | 35.83 | ||||||||||||
1974 | 20.43 | a | 27.71 | 30.06 | 34.30 | 39.06 | 47.27 | 49.81 | 47.87 | 39.17 | 30.74 | 30.33 | 24.39 | 35.10 | ||||||||||||
1975 | 25.39 | 25.86 | 27.55 | 30.20 | 38.19 | 45.07 | 55.16 | 46.65 | 38.97 | 36.23 | 26.70 | 24.71 | 35.06 | |||||||||||||
1976 | 23.42 | 23.31 | 28.00 | 33.90 | 37.23 | e | 41.96 | f | 47.81 | j | 49.94 | 43.60 | 29.87 | 28.13 | 18.87 | 31.63 | b | |||||||||
1977 | 13.87 | 25.04 | 28.45 | 32.90 | 39.61 | 46.30 | 48.19 | 52.42 | 40.69 | a | 33.84 | 25.63 | 28.97 | 34.66 | ||||||||||||
1978 | 27.13 | 29.29 | 32.97 | 35.03 | 38.32 | 46.23 | 51.61 | 48.58 | 41.70 | 29.94 | 20.43 | 15.30 | a | 34.71 | ||||||||||||
1979 | 6.20 | a | 24.29 | 30.32 | 36.03 | 41.32 | 43.57 | 50.48 | 51.23 | 43.87 | 37.71 | 25.87 | 24.78 | m | 35.53 | a | ||||||||||
1980 | 20.23 | 29.34 | 30.13 | a | 34.57 | 41.45 | 45.33 | 49.61 | 44.97 | 42.63 | 30.17 | a | 30.27 | d | 24.61 | 35.28 | ||||||||||
1981 | 26.13 | 26.50 | 29.81 | 35.47 | 41.61 | 47.43 | 46.71 | 47.58 | 41.63 | 32.28 | b | 30.17 | 27.07 | a | 36.03 | |||||||||||
1982 | 18.00 | e | 22.52 | a | 29.10 | 29.23 | 36.87 | 49.17 | 51.30 | a | 50.10 | a | 41.57 | 33.13 | a | 24.48 | c | 25.76 | b | 34.27 | ||||||
1983 | 25.29 | c | 30.15 | b | 33.89 | c | 32.83 | a | 40.16 | 46.53 | 50.17 | a | 52.45 | 37.97 | 31.45 | b | 31.71 | b | 17.70 | a | 35.86 | |||||
1984 | 20.80 | a | 27.62 | 32.42 | 33.53 | 40.35 | 44.90 | a | 48.90 | 49.84 | 42.57 | 32.70 | a | 31.07 | 18.03 | a | 35.23 | |||||||||
1985 | 16.16 | 18.41 | a | 24.94 | 35.45 | a | 41.39 | 44.87 | 52.29 | 46.18 | i | 38.83 | a | 30.62 | b | 19.89 | b | 10.23 | 30.28 | a | ||||||
1986 | 26.23 | a | 30.88 | b | 34.32 | 33.80 | 40.52 | 49.07 | 47.45 | 50.45 | 40.40 | 33.20 | k | 30.59 | a | 23.30 | a | 37.00 | a | |||||||
1987 | 17.13 | a | 26.57 | 33.13 | 35.67 | 42.10 | 46.80 | 51.65 | 44.32 | 40.60 | e | 29.42 | 28.60 | e | 24.88 | e | 35.07 | |||||||||
1988 | 22.63 | a | 23.81 | c | 26.67 | d | 35.13 | 39.81 | 47.63 | 48.65 | 43.85 | e | 40.23 | d | 37.00 | j | 31.76 | m | 21.55 | i | 36.49 | c | ||||
1989 | 18.85 | k | 11.64 | f | 31.97 | a | 37.20 | 40.04 | h | 45.37 | k | 49.57 | j | 48.91 | h | 37.30 | j | 31.48 | j | 25.63 | k | 19.00 | m | 34.58 | j | |
1990 | 27.24 | j | 22.00 | k | 26.50 | i | 34.62 | i | 37.59 | i | 45.90 | i | 50.81 | j | 51.13 | h | 43.16 | k | 31.26 | h | 26.83 | l | 12.52 | j | ----- | z |
1991 | 16.53 | l | 27.72 | j | 27.65 | n | 33.95 | i | 38.05 | j | 45.11 | l | 49.80 | k | 51.55 | i | 39.73 | h | 29.17 | h | 34.00 | l | 24.25 | k | ----- | z |
1992 | 26.26 | h | 29.00 | l | 29.61 | m | 36.83 | g | 39.42 | l | 49.48 | i | 48.95 | i | 46.76 | j | 40.73 | h | 32.05 | i | 29.39 | l | 21.09 | i | ----- | z |
1993 | 9.00 | r | 18.17 | j | 31.59 | i | 34.45 | h | 45.90 | k | 46.27 | h | 47.14 | j | 46.09 | i | 36.38 | i | 34.60 | k | 18.59 | m | 23.10 | j | ----- | z |
1994 | 25.63 | l | 21.16 | i | 29.18 | i | 36.16 | k | 43.43 | j | 44.23 | h | 48.60 | k | 46.87 | h | 42.95 | h | 30.14 | j | 24.53 | k | 19.52 | j | ----- | z |
1995 | 25.82 | i | 27.00 | l | 30.00 | h | 34.00 | i | 41.05 | j | 46.59 | h | 51.50 | k | 45.96 | h | 41.24 | i | 31.73 | i | 31.26 | k | 28.24 | j | ----- | z |
1996 | 23.74 | l | 21.18 | l | 29.91 | i | 35.29 | i | 38.43 | j | 43.74 | k | 50.09 | i | 48.18 | i | 40.18 | m | 33.43 | h | 29.78 | l | 25.57 | j | ----- | z |
1997 | 22.77 | i | 25.32 | i | 32.73 | i | 34.90 | i | 42.71 | j | 45.86 | i | 49.71 | j | 52.24 | j | 45.38 | i | 31.89 | l | 29.83 | l | 21.86 | j | ----- | z |
1998 | 23.09 | i | 27.30 | h | 28.62 | j | 34.86 | h | 41.19 | j | 45.05 | h | 53.86 | i | 48.33 | j | 45.14 | i | 31.00 | k | 31.88 | m | 21.33 | j | ----- | z |
1999 | 25.60 | k | 24.79 | i | 28.86 | i | 29.10 | i | 37.24 | j | 44.57 | i | 47.19 | j | 51.31 | e | 35.83 | f | 29.58 | e | 31.70 | g | 24.67 | j | 40.44 | j |
2000 | 23.41 | i | 29.52 | h | 28.14 | i | 34.95 | i | 40.23 | i | 45.43 | g | 49.14 | j | 45.64 | i | 42.04 | g | 33.45 | i | 24.00 | k | 25.28 | m | ----- | z |
2001 | 24.78 | h | 23.79 | i | 29.19 | j | 34.14 | h | 38.88 | f | 44.59 | h | 50.00 | j | 49.39 | h | 42.11 | k | 32.43 | h | 30.31 | n | 26.09 | i | ----- | z |
2002 | 24.64 | i | 23.28 | j | 28.05 | i | 31.24 | i | 39.45 | i | 48.62 | i | 51.68 | i | 45.22 | h | 38.90 | j | 25.74 | h | 22.44 | l | 25.33 | m | ----- | z |
2003 | 28.18 | i | 24.24 | g | 34.53 | l | 34.82 | h | 40.90 | k | 45.00 | j | 52.96 | f | 49.90 | j | 43.17 | g | 35.48 | h | 23.12 | m | 26.14 | j | ----- | z |
2004 | 21.14 | j | 27.10 | h | 31.25 | g | 34.00 | f | 42.62 | j | 48.04 | g | 51.77 | i | 54.09 | i | 41.00 | g | 34.43 | j | 26.40 | j | 23.90 | k | ----- | z |
2005 | 25.00 | j | 20.50 | h | 29.27 | i | 34.64 | h | 44.43 | j | 44.00 | h | 50.52 | h | 47.33 | g | 37.65 | g | 35.86 | j | 26.24 | i | 21.71 | j | ----- | z |
2006 | 29.00 | i | 23.40 | h | 30.12 | g | 34.05 | k | 40.26 | h | 49.05 | j | 52.00 | k | 47.09 | h | 40.64 | h | 29.48 | j | 27.65 | j | 22.70 | k | ----- | z |
2007 | 17.09 | i | 25.95 | h | 29.91 | h | 31.85 | j | 40.68 | f | 45.80 | j | 53.68 | i | 47.64 | f | 38.15 | j | 33.79 | g | 23.79 | k | 26.47 | l | ----- | z |
2008 | 16.48 | j | 26.11 | j | 26.00 | h | 28.16 | k | 40.75 | o | 41.32 | k | 48.96 | h | 49.45 | 38.25 | j | 30.33 | j | 30.18 | m | 17.45 | i | 49.45 | k | |
2009 | 20.53 | l | 23.47 | k | 26.23 | i | 32.29 | i | 38.79 | l | 49.15 | j | 49.85 | k | 52.35 | h | 42.38 | i | 31.26 | l | 24.21 | k | 15.29 | j | ----- | z |
2010 | 27.65 | n | 27.42 | i | 25.59 | i | 33.58 | k | 36.41 | n | 45.81 | i | 47.72 | m | 46.23 | i | 45.10 | j | 33.79 | l | 25.44 | l | 24.79 | l | ----- | z |
2011 | 21.05 | k | 23.88 | l | 29.35 | n | 31.55 | s | 37.14 | j | 44.72 | l | 47.00 | m | 46.56 | o | 42.26 | k | 33.82 | n | 24.00 | t | 14.68 | l | ----- | z |
2012 | 23.89 | v | 22.74 | j | 28.60 | p | 34.47 | k | 37.12 | n | 43.56 | l | 50.68 | l | 46.52 | h | 37.39 | l | 28.94 | n | 27.90 | t | 22.21 | q | ----- | z |
2013 | 14.14 | i | 22.88 | k | 28.90 | k | 29.52 | i | 38.52 | j | 46.15 | j | 50.50 | k | 50.68 | i | 43.55 | j | 28.88 | n | 21.00 | t | 9.00 | l | ----- | z |
2014 | 20.91 | i | 22.12 | k | 28.57 | j | 34.15 | j | 39.35 | n | 44.94 | l | 54.19 | o | 51.25 | s | 41.21 | k | 39.06 | o | 28.50 | v | 27.88 | w | ----- | z |
2015 | 27.39 | m | 34.92 | o | 31.33 | v | 31.95 | i | 42.17 | m | 50.82 | m | 53.20 | k | 48.50 | m | 40.38 | n | 37.33 | s | 30.27 | s | 28.39 | m | ----- | z |
2016 | 26.12 | o | 27.25 | m | 31.70 | k | 34.11 | u | 39.67 | v | 48.37 | 51.84 | 49.23 | 43.40 | 41.61 | 35.80 | 15.87 | 40.87 | e | |||||||
2017 | 20.94 | m | 30.25 | 35.68 | 37.03 | 42.81 | 46.84 | e | 53.29 | 52.19 | 45.30 | 34.15 | e | 30.53 | ----- | z | 40.81 | b | ||||||||
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.43 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.43 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.36 | 26.49 | 29.60 | 33.47 | 39.79 | 46.69 | 49.70 | 48.69 | 41.02 | 32.58 | 28.67 | 22.45 | 35.11 | |||||||||||||
S.D. | 5.30 | 3.03 | 2.96 | 2.20 | 1.75 | 2.21 | 2.10 | 2.57 | 2.58 | 2.72 | 3.80 | 4.67 | 0.77 | |||||||||||||
SKEW | -0.91 | -0.37 | 0.07 | -0.29 | -0.50 | 0.17 | 0.23 | -0.18 | -0.07 | 1.48 | -0.72 | -0.70 | -0.13 | |||||||||||||
MAX | 29.06 | 32.31 | 35.68 | 37.20 | 42.81 | 51.30 | 55.16 | 52.45 | 45.34 | 41.61 | 35.80 | 30.16 | 36.64 | |||||||||||||
MIN | 6.20 | 18.41 | 23.32 | 29.23 | 35.77 | 42.20 | 44.81 | 43.85 | 36.20 | 29.42 | 19.89 | 10.23 | 33.42 | |||||||||||||
YRS | 27 | 28 | 30 | 30 | 29 | 26 | 30 | 30 | 30 | 29 | 29 | 27 | 19 |