YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.64 | t | 20.59 | a | 12.35 | e | 16.47 | j |
1952 | 13.26 | 20.00 | a | 22.03 | 28.90 | i | 35.84 | 41.07 | b | 50.78 | d | 43.73 | e | 37.71 | f | 31.27 | t | ----- | z | ----- | z | 32.39 | e | |||
1953 | 27.27 | e | 18.39 | 19.97 | a | 24.89 | c | 30.20 | a | 37.12 | f | 41.93 | a | 43.61 | 36.67 | 26.06 | 26.08 | e | 16.97 | a | 28.37 | a | ||||
1954 | 21.04 | e | 22.54 | 18.85 | e | 27.20 | 33.24 | b | 39.14 | b | 44.50 | a | 37.64 | f | 28.43 | b | 20.39 | c | 18.20 | 7.12 | g | 27.35 | b | |||
1955 | 1.32 | l | ----- | z | 22.17 | g | 24.21 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.50 | d | 27.71 | 15.38 | d | 4.56 | o | 25.86 | i | |
1960 | 15.07 | c | 20.53 | l | 27.71 | 28.38 | f | 32.63 | d | 44.00 | 45.70 | h | 36.87 | h | 32.60 | j | 23.27 | e | ----- | z | 11.71 | q | 28.54 | g | ||
1961 | 8.60 | p | 22.17 | j | 21.72 | m | 21.53 | 30.00 | 44.71 | f | 43.68 | 47.55 | 31.77 | 24.03 | a | 9.53 | 12.64 | q | 29.73 | e | ||||||
1962 | 0.67 | g | 20.35 | e | 19.87 | 26.97 | 32.39 | 37.17 | 45.33 | g | 41.86 | c | 36.93 | a | 29.17 | a | 21.75 | b | 20.59 | i | 29.60 | c | ||||
1963 | 7.10 | 27.64 | 21.13 | 23.40 | 37.80 | a | 38.87 | 41.33 | d | 40.83 | b | 37.97 | 28.03 | 21.07 | 13.24 | b | 28.20 | |||||||||
1964 | 13.06 | 13.31 | 16.52 | 20.77 | 27.35 | 37.90 | 44.74 | 40.42 | 29.27 | 25.10 | 16.83 | 20.52 | 25.48 | |||||||||||||
1965 | 18.10 | 19.68 | 15.90 | 27.00 | e | 29.00 | d | 37.93 | b | 41.84 | 41.10 | a | 27.47 | 23.42 | 21.31 | d | 8.94 | 25.97 | ||||||||
1966 | 11.82 | c | 12.20 | c | 17.54 | e | 24.67 | f | 36.97 | b | 41.89 | b | 41.69 | b | 45.00 | b | 38.68 | b | 23.63 | d | 26.15 | d | 19.65 | 28.66 | a | |
1967 | 19.35 | 21.04 | 21.33 | a | 23.82 | b | 34.37 | a | 43.32 | b | 49.52 | b | 47.71 | 39.97 | 26.47 | a | 22.97 | a | 13.71 | 30.30 | ||||||
1968 | 13.10 | 25.46 | a | 22.93 | b | 23.46 | d | 33.90 | b | 42.93 | c | 46.71 | c | 43.17 | a | 35.07 | b | 24.43 | a | 27.73 | 18.72 | b | 29.80 | |||
1969 | 20.26 | 21.93 | a | 19.93 | b | 26.57 | 37.41 | d | 44.27 | 46.96 | d | 42.67 | a | 37.90 | a | 25.03 | a | 17.57 | 20.45 | 30.08 | ||||||
1970 | 22.00 | f | 22.86 | 23.24 | b | 22.82 | b | 34.33 | a | 45.36 | h | 47.00 | d | 42.90 | b | 31.45 | a | 20.73 | a | 26.88 | m | 15.27 | e | 28.96 | c | |
1971 | 22.39 | 19.74 | a | 19.81 | ----- | z | 34.29 | c | 40.90 | a | 47.29 | q | 47.89 | c | 31.27 | 26.66 | b | 21.96 | e | 10.53 | a | 27.54 | b | |||
1972 | 12.96 | h | 20.15 | b | 26.38 | e | 25.58 | f | 34.46 | e | 45.32 | h | 46.44 | d | 44.85 | e | 33.04 | c | 27.60 | a | 22.32 | b | 7.19 | e | 29.16 | c |
1973 | 16.00 | d | 24.73 | f | 22.92 | f | 28.80 | 37.59 | b | 38.96 | e | 47.81 | d | 44.71 | c | 35.18 | h | 25.24 | b | 25.96 | c | 22.96 | f | 33.13 | d | |
1974 | 15.83 | a | 19.38 | b | 28.58 | e | 26.31 | d | 34.96 | g | 40.50 | t | 45.35 | e | 40.00 | p | ----- | z | ----- | z | ----- | z | 12.95 | l | 27.09 | g |
1975 | 13.10 | a | 19.48 | e | 24.55 | 24.64 | b | 32.11 | c | 39.00 | e | 49.03 | a | 44.15 | e | 36.00 | b | 28.06 | m | 15.20 | e | 19.27 | e | 28.78 | a | |
1976 | 15.68 | c | 17.81 | c | 17.26 | 22.54 | d | 34.55 | b | 38.97 | 50.00 | d | 41.93 | a | 38.64 | b | 25.66 | b | 18.72 | e | 7.00 | c | 27.40 | |||
1977 | 6.19 | 18.64 | f | 18.28 | b | 26.92 | f | 32.21 | b | 49.21 | b | 47.31 | e | 47.52 | d | 34.17 | a | 26.96 | e | 20.04 | e | 20.00 | j | 31.32 | c | |
1978 | 24.77 | e | 23.75 | 28.89 | c | 30.43 | 32.89 | d | 38.62 | i | 46.17 | b | 43.93 | d | 35.58 | d | 22.57 | c | 15.04 | d | 7.27 | a | 28.30 | a | ||
1979 | 9.93 | b | 22.42 | b | 26.18 | c | 28.11 | b | 36.03 | b | 38.28 | a | 48.28 | f | 47.48 | b | ----- | z | ----- | z | ----- | z | 19.50 | s | 29.78 | e |
1980 | 21.50 | g | 28.40 | i | 23.21 | q | 29.35 | m | 38.54 | g | 38.76 | i | 45.86 | q | 39.69 | o | 38.94 | n | 26.23 | i | 27.12 | v | 16.06 | m | ----- | z |
1981 | 16.68 | i | 19.00 | j | 24.11 | m | 30.25 | n | 35.17 | h | 41.53 | m | 44.48 | j | 43.32 | c | 38.50 | f | 26.09 | h | 22.36 | h | 25.58 | e | 34.45 | j |
1982 | 17.52 | b | 17.55 | f | 24.50 | a | 24.38 | a | 31.84 | 42.00 | ----- | z | 47.44 | m | ----- | z | ----- | z | ----- | z | 13.60 | f | 28.05 | g | ||
1983 | 20.26 | d | 26.22 | a | 29.48 | b | 26.07 | b | 33.81 | 41.04 | f | 42.34 | b | 47.32 | c | 37.32 | b | 28.29 | c | 28.04 | c | ----- | z | 31.92 | b | |
1984 | 13.83 | m | 18.91 | f | 26.64 | c | 27.73 | h | 36.04 | c | 37.36 | b | 49.26 | h | 45.67 | j | 32.04 | f | 26.58 | e | 23.65 | g | 7.67 | j | 31.65 | h |
1985 | 10.38 | e | 14.77 | f | 20.04 | d | 29.93 | a | 32.71 | n | 41.88 | e | 50.17 | g | 39.33 | d | 29.71 | f | 22.43 | j | 12.76 | m | 12.17 | h | 28.31 | g |
1986 | 22.00 | g | 26.27 | b | 26.64 | i | 28.96 | f | 34.38 | g | 46.57 | 44.48 | 46.65 | 32.17 | f | ----- | z | 20.82 | h | 10.15 | k | 40.99 | h | |||
1987 | 11.29 | g | 17.91 | f | 22.81 | d | 27.79 | p | 40.05 | j | 43.93 | c | 44.96 | h | 42.48 | h | 33.95 | i | 27.41 | i | 21.56 | e | ----- | z | 29.43 | i |
1988 | 11.52 | d | 16.86 | a | 21.41 | i | 31.09 | g | 32.53 | l | 45.11 | k | 48.13 | h | 41.96 | c | 32.72 | e | 27.48 | 24.40 | e | 9.19 | d | 23.45 | e | |
1989 | 7.72 | b | 10.57 | 25.93 | q | 28.70 | j | 36.69 | r | 43.75 | r | 46.82 | t | 41.44 | m | 33.52 | e | 24.52 | b | 13.09 | h | 9.39 | c | 17.15 | g | |
1990 | 17.96 | f | 11.74 | e | 21.38 | e | 32.96 | f | 33.82 | i | 40.52 | c | 46.77 | i | 45.92 | f | 37.91 | h | 23.05 | j | 16.12 | d | 1.08 | g | 22.44 | h |
1991 | 8.97 | b | 17.26 | i | 25.75 | c | 26.57 | i | 33.09 | i | 39.67 | l | 48.16 | l | 44.92 | f | 34.48 | g | 25.86 | c | 24.50 | l | 14.00 | l | 20.19 | i |
1992 | 12.00 | k | 23.24 | l | 23.73 | e | 30.59 | h | 36.26 | d | 41.79 | b | 46.04 | c | 45.04 | d | 35.30 | g | 28.63 | l | 17.91 | h | 10.28 | f | 38.57 | g |
1993 | 6.92 | f | 12.52 | e | 30.62 | g | 29.14 | i | 37.96 | e | 42.35 | g | 40.96 | h | 42.69 | b | 31.83 | g | 29.57 | h | 12.33 | i | 19.85 | e | 28.25 | h |
1994 | 16.67 | g | 14.10 | g | 21.08 | g | 30.95 | k | 38.80 | f | 39.62 | i | 49.22 | h | 42.43 | c | 34.78 | g | 24.57 | q | 13.62 | n | 9.27 | i | 42.43 | k |
1995 | 22.73 | e | 22.52 | e | 23.16 | l | 26.14 | w | 38.33 | p | 38.20 | o | 44.92 | s | 42.12 | n | 36.36 | p | 23.79 | q | 12.20 | y | 30.11 | v | 22.63 | j |
1996 | 16.77 | r | 22.46 | p | 25.80 | u | 29.00 | o | 34.71 | q | 41.88 | n | 49.53 | p | 42.00 | p | 30.60 | o | 27.94 | n | 23.00 | q | 18.50 | q | ----- | z |
1997 | 12.93 | p | 17.27 | m | 24.00 | m | 26.76 | m | 37.42 | l | 43.64 | p | 46.90 | k | 43.52 | b | 38.52 | e | 27.38 | e | ----- | z | ----- | z | 36.47 | i |
1998 | ----- | z | 24.76 | c | ----- | z | 29.00 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.00 | h | 12.08 | f | 24.76 | k |
1999 | 18.17 | b | 20.43 | e | 22.00 | i | 23.00 | g | 29.94 | o | 39.40 | t | 39.00 | u | ----- | z | 28.60 | t | 22.54 | r | 14.75 | r | ----- | z | 19.30 | j |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.68 | 20.55 | j | 20.23 | a | 25.96 | j | |
2002 | ----- | z | 20.19 | g | 23.56 | f | 30.87 | 38.54 | e | 47.53 | 55.39 | c | 45.40 | a | 38.83 | 25.71 | 19.60 | 21.52 | 35.93 | c | ||||||
2003 | 25.94 | 17.74 | a | 28.00 | 28.40 | 38.11 | d | 47.50 | 53.17 | g | 50.61 | c | 41.57 | b | 34.00 | c | 19.83 | 25.00 | 32.43 | a | ||||||
2004 | 22.58 | 24.62 | 28.61 | 30.47 | 38.55 | 46.62 | f | 53.16 | f | 50.72 | b | 39.37 | c | 30.68 | l | 22.40 | j | 19.59 | d | 31.81 | d | |||||
2005 | 13.32 | c | 21.64 | f | 25.96 | d | 28.44 | l | 42.00 | d | 43.00 | h | 52.10 | 48.67 | j | 32.96 | c | 28.74 | 22.50 | 18.81 | d | 29.55 | d | |||
2006 | 22.42 | s | 25.75 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.30 | c | 26.65 | 27.40 | o | ----- | z | 31.47 | j | |
2007 | ----- | z | ----- | z | 23.83 | y | 29.03 | 38.00 | 45.53 | 55.28 | b | 48.74 | l | 36.30 | 29.14 | b | 21.97 | 14.84 | 33.76 | d | ||||||
2008 | 16.42 | e | 20.03 | 20.90 | 26.05 | i | 36.09 | h | 45.43 | g | 51.29 | 48.74 | 36.37 | 27.97 | a | 27.00 | 14.17 | b | 29.21 | c | ||||||
2009 | 23.44 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 16.09 | 20.08 | 22.87 | 26.18 | 34.71 | 41.79 | 46.91 | 44.57 | 35.28 | 26.25 | 20.88 | 15.74 | 28.18 | |||||||||||||
S.D. | 5.65 | 4.46 | 3.95 | 2.96 | 3.22 | 3.41 | 3.93 | 2.88 | 3.52 | 2.79 | 4.36 | 5.53 | 1.98 | |||||||||||||
SKEW | 0.15 | -0.52 | 0.05 | -0.07 | -0.16 | 0.52 | 0.53 | 0.40 | -0.48 | 0.30 | -0.37 | -0.10 | -0.23 | |||||||||||||
MAX | 27.27 | 27.64 | 29.48 | 30.87 | 42.00 | 49.21 | 55.39 | 50.72 | 41.57 | 34.00 | 28.04 | 25.58 | 30.30 | |||||||||||||
MIN | 6.19 | 10.57 | 15.90 | 20.77 | 27.35 | 37.17 | 41.33 | 39.33 | 27.47 | 20.39 | 9.53 | 7.00 | 25.48 | |||||||||||||
YRS | 31 | 31 | 33 | 24 | 32 | 27 | 26 | 33 | 30 | 33 | 29 | 26 | 7 |