YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.71 | 43.70 | 35.35 | 26.47 | 15.55 | 33.76 | g | |||||
1949 | 9.35 | 20.96 | 27.69 | b | 36.36 | b | 38.11 | c | 45.38 | a | 50.07 | d | 47.86 | b | 45.24 | a | 34.00 | d | 34.61 | b | 21.00 | 34.22 | ||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | 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 | ----- | z | 37.88 | g | 28.27 | 23.06 | 25.67 | j | ||
1960 | 20.59 | b | 21.86 | g | 29.70 | h | 28.00 | f | 34.35 | 47.38 | a | 55.76 | b | 50.23 | 47.50 | 38.84 | 27.93 | a | 25.68 | f | 40.32 | d | ||||
1961 | 27.68 | 28.50 | f | 27.40 | a | 31.33 | 37.41 | b | 49.93 | 53.48 | 55.48 | 42.68 | b | 37.29 | 28.20 | 23.48 | 37.67 | a | ||||||||
1962 | 18.97 | 25.33 | a | 26.39 | 35.97 | 36.42 | 43.03 | a | 50.39 | 49.26 | 48.27 | 37.16 | 33.37 | 28.17 | a | 36.06 | ||||||||||
1963 | 21.97 | 33.18 | 27.07 | a | 28.00 | 40.84 | 42.40 | 47.19 | 49.26 | 48.07 | 39.45 | 31.00 | 27.35 | 36.31 | ||||||||||||
1964 | ----- | z | ----- | z | 24.32 | 28.97 | a | 35.90 | 43.37 | 51.54 | c | 48.53 | a | 41.27 | 39.97 | 26.03 | a | 25.55 | 36.54 | b | ||||||
1965 | 24.84 | 26.15 | b | 28.43 | a | 34.80 | 36.65 | 43.87 | 46.03 | 47.97 | 40.67 | 41.58 | 30.62 | a | 21.97 | a | 35.30 | |||||||||
1966 | 21.90 | 22.79 | 25.84 | 30.83 | 39.48 | 41.83 | a | 46.16 | 49.38 | b | 44.31 | a | 35.61 | 29.50 | 24.77 | 34.37 | ||||||||||
1967 | 23.38 | b | 26.46 | 25.03 | 24.50 | 37.90 | 44.77 | 52.58 | 55.23 | 46.60 | 34.41 | b | 30.34 | a | 17.50 | a | 34.89 | |||||||||
1968 | 17.30 | a | 28.62 | 28.16 | 28.73 | 36.03 | 44.80 | 53.71 | 47.81 | 44.03 | 34.42 | 28.23 | 19.68 | 34.29 | ||||||||||||
1969 | 19.32 | 21.32 | 24.77 | 30.60 | 40.97 | 46.03 | 50.19 | 48.68 | 45.62 | a | 31.00 | 28.20 | 25.07 | a | 34.31 | |||||||||||
1970 | 24.32 | 27.61 | 26.68 | 25.60 | 37.84 | 47.21 | a | 51.61 | 49.74 | 39.21 | a | 33.71 | c | 31.00 | 17.52 | b | 34.34 | |||||||||
1971 | 22.65 | 23.82 | 23.65 | 29.23 | 36.29 | 41.63 | 51.74 | 52.39 | 38.43 | 30.81 | 27.00 | a | 17.19 | 32.90 | ||||||||||||
1972 | 17.16 | 25.17 | 30.63 | a | 28.47 | 39.29 | 44.70 | 50.68 | 50.55 | 40.83 | 34.55 | 25.90 | 15.97 | 33.66 | ||||||||||||
1973 | 17.52 | 25.86 | 25.29 | 30.97 | 40.58 | 44.60 | 50.90 | b | 49.16 | 43.17 | a | 35.21 | c | ----- | z | ----- | z | 36.33 | b | |||||||
1974 | 15.77 | a | 19.57 | 25.23 | 28.33 | ----- | z | ----- | z | 49.13 | 50.61 | 46.17 | 34.85 | d | 27.50 | b | 22.17 | b | 31.93 | b | ||||||
1975 | 20.29 | c | 20.88 | b | 23.74 | d | 24.31 | d | 37.64 | c | 42.77 | d | 50.96 | c | 47.13 | 49.00 | 35.55 | 25.43 | b | 25.93 | a | 33.64 | ||||
1976 | 24.77 | 23.81 | b | 23.47 | a | 27.04 | d | 38.55 | 41.31 | a | 52.32 | 46.68 | 46.97 | a | 37.66 | b | 32.70 | 24.84 | 35.01 | |||||||
1977 | 16.39 | 26.89 | 23.64 | c | 34.57 | 32.70 | a | 49.87 | ----- | z | 56.03 | a | 43.60 | 37.50 | a | 28.67 | 26.19 | 34.19 | a | |||||||
1978 | 27.71 | 27.71 | 33.48 | 31.10 | a | ----- | z | ----- | z | ----- | z | ----- | z | 42.00 | h | ----- | z | ----- | z | ----- | z | 30.00 | h | |||
1979 | ----- | z | ----- | z | 30.06 | 31.22 | g | ----- | z | ----- | z | ----- | z | ----- | z | 48.41 | c | ----- | z | 27.63 | 25.97 | a | 33.02 | h | ||
1980 | ----- | z | 29.58 | e | 25.58 | 32.52 | c | 38.10 | 40.00 | d | 52.21 | c | 49.21 | l | 45.19 | d | 37.72 | b | 29.61 | g | 26.11 | c | 36.34 | c | ||
1981 | 28.32 | c | 26.41 | a | 28.36 | f | 33.00 | e | 38.47 | a | 44.50 | 49.81 | 52.65 | 45.77 | 35.26 | 30.79 | b | 27.54 | c | 37.50 | a | |||||
1982 | 19.94 | 22.76 | c | 26.19 | d | 27.86 | a | 37.52 | b | 45.30 | 50.31 | b | ----- | z | 40.90 | a | 33.80 | k | 25.00 | j | 20.88 | f | 33.85 | d | ||
1983 | 25.52 | d | 27.50 | b | 29.32 | 28.57 | i | 38.61 | 38.89 | k | 46.48 | h | 50.46 | c | 41.43 | i | 38.03 | a | 28.90 | a | 24.32 | 32.83 | d | |||
1984 | 24.58 | 25.80 | d | 30.25 | c | 30.48 | c | 37.67 | a | 43.65 | d | 52.96 | h | 50.48 | 46.10 | a | 33.44 | d | 26.82 | b | 19.33 | a | 33.51 | a | ||
1985 | 20.16 | 22.11 | a | 24.84 | 36.15 | c | 36.73 | a | 47.41 | a | 54.03 | a | 48.42 | 39.26 | c | 34.33 | d | 20.90 | 23.29 | 33.97 | ||||||
1986 | 29.30 | a | 30.07 | 33.03 | a | 31.26 | c | 39.14 | b | 49.79 | a | 49.87 | 54.39 | 40.45 | a | ----- | z | 29.76 | e | 22.30 | d | 37.21 | a | |||
1987 | 18.97 | b | 25.50 | b | 28.45 | b | 36.93 | a | 42.00 | c | ----- | z | 47.10 | 52.06 | 47.83 | 43.03 | 29.52 | c | 22.42 | e | 35.80 | a | ||||
1988 | 20.50 | c | 27.21 | 26.90 | 35.62 | d | 35.70 | d | 46.79 | b | 54.10 | 52.58 | 44.90 | ----- | z | 29.93 | c | 22.14 | b | 36.03 | a | |||||
1989 | 16.76 | b | 16.76 | c | 28.58 | 36.87 | 35.81 | 47.27 | 49.84 | 47.97 | 43.77 | 35.82 | c | 29.45 | a | 25.65 | 34.54 | |||||||||
1990 | 23.37 | d | 20.72 | c | 29.26 | d | 36.97 | 35.90 | 43.53 | 52.63 | a | 50.00 | e | 45.42 | f | 34.42 | e | 25.48 | c | 13.00 | e | 33.21 | a | |||
1991 | 22.78 | d | 31.61 | 24.00 | d | 31.13 | g | 36.72 | m | 39.52 | g | 53.04 | e | 51.36 | f | 49.23 | 39.88 | g | 32.62 | d | 24.19 | e | 33.92 | e | ||
1992 | 24.40 | a | 29.45 | 31.90 | 38.15 | c | 45.19 | 49.00 | 52.06 | 54.74 | 45.81 | c | 40.34 | b | 26.96 | b | 19.71 | j | 39.82 | a | ||||||
1993 | 16.67 | a | 19.77 | b | 33.31 | b | 31.97 | 41.00 | 38.11 | c | 45.20 | a | 47.84 | 45.43 | b | 37.11 | m | 24.41 | a | 22.42 | e | 33.28 | a | |||
1994 | 25.56 | d | 22.33 | a | 29.80 | a | 34.97 | a | 41.63 | a | 44.50 | 55.97 | a | 51.08 | e | 46.37 | c | 35.19 | 22.00 | a | 21.93 | b | 35.94 | |||
1995 | 27.52 | 31.79 | 27.33 | a | 30.90 | 39.10 | 43.03 | a | 50.39 | 47.97 | 46.87 | 34.76 | b | 32.72 | a | 27.24 | b | 36.63 | ||||||||
1996 | 25.77 | 26.28 | 28.06 | 31.07 | 35.19 | 43.63 | 53.13 | 50.52 | 40.50 | 35.00 | 28.50 | b | 24.68 | c | 35.19 | |||||||||||
1997 | 19.80 | a | 23.22 | a | 28.65 | 30.07 | 40.35 | 41.59 | a | 48.61 | 48.97 | 41.83 | 32.74 | 28.66 | a | 19.86 | b | 33.70 | ||||||||
1998 | 26.79 | b | 24.92 | c | 28.13 | a | 32.10 | 34.76 | b | 44.72 | a | 54.45 | b | 53.54 | c | 48.50 | 34.68 | f | 28.26 | c | 17.62 | e | 35.80 | a | ||
1999 | 24.25 | c | 21.88 | c | 26.07 | d | 28.81 | d | 35.89 | c | 42.42 | d | 48.38 | b | 49.06 | 43.00 | 35.30 | a | 29.40 | e | 23.24 | f | 34.95 | a | ||
2000 | 23.62 | e | 27.52 | b | 27.37 | a | 33.87 | 38.60 | a | 47.07 | a | 49.32 | 50.68 | 42.73 | 35.53 | a | 24.87 | 24.67 | a | 35.49 | ||||||
2001 | 22.93 | b | 22.50 | 30.32 | 29.50 | 42.00 | 41.82 | b | 51.23 | 52.77 | 46.40 | 38.40 | a | 28.80 | 22.55 | 35.77 | ||||||||||
2002 | 20.35 | 24.96 | 25.19 | 33.10 | a | 36.74 | 45.69 | a | 54.48 | b | 48.90 | 44.27 | 33.06 | 28.03 | a | 24.91 | h | 35.89 | a | |||||||
2003 | 29.86 | c | 22.96 | a | 28.97 | 28.10 | a | 38.97 | a | 47.40 | 56.40 | a | 52.06 | 47.90 | 40.53 | a | 25.77 | 25.86 | c | 37.06 | ||||||
2004 | 24.45 | b | 25.00 | a | 34.06 | 34.10 | 39.26 | 45.50 | 52.84 | 53.32 | 42.73 | 35.90 | 27.40 | 25.64 | c | 36.68 | ||||||||||
2005 | 22.55 | 26.39 | 29.77 | 30.66 | a | 40.55 | 40.90 | 54.48 | b | 52.23 | a | 42.23 | 34.97 | a | 27.38 | a | 24.26 | 35.53 | ||||||||
2006 | 23.81 | 22.21 | 22.48 | 31.27 | 39.48 | 45.68 | b | 50.07 | a | 46.17 | a | 42.90 | 32.60 | a | 27.40 | 21.29 | 33.78 | |||||||||
2007 | 16.90 | b | 24.15 | b | 29.81 | d | 31.21 | b | 37.90 | 43.50 | 51.65 | 48.19 | 40.53 | 30.41 | i | 26.11 | b | 18.75 | k | 35.00 | b | |||||
2008 | 15.96 | f | 23.75 | a | 26.32 | c | 27.41 | a | 39.81 | 43.50 | 52.71 | 51.90 | 46.40 | 35.14 | b | 31.00 | s | 20.58 | 36.75 | b | ||||||
2009 | 21.91 | h | 25.20 | c | 23.62 | e | 29.26 | g | 39.14 | j | 45.04 | g | 53.26 | l | 52.15 | r | 47.17 | 32.44 | o | 26.33 | 17.74 | 28.01 | g | |||
2010 | 26.95 | l | 25.56 | a | 24.80 | k | 27.90 | 31.75 | c | 44.33 | 50.36 | t | 50.14 | c | 44.28 | a | 39.45 | 24.20 | o | 26.03 | 36.18 | d | ||||
2011 | 21.97 | 21.04 | 25.81 | 28.61 | b | 33.26 | 42.03 | 50.35 | 52.16 | 48.97 | 36.10 | 25.70 | 17.36 | q | 35.09 | a | ||||||||||
2012 | 21.86 | c | 22.34 | 23.94 | n | 30.24 | m | 36.50 | m | 41.62 | i | 49.55 | k | 53.20 | k | 47.27 | o | 34.44 | o | 29.93 | o | 17.71 | n | 22.10 | j | |
2013 | 16.56 | m | 21.62 | o | 28.35 | n | 29.59 | m | 35.92 | r | 42.60 | o | 55.15 | r | 49.81 | o | 42.87 | o | 32.71 | x | 28.80 | e | 16.84 | f | 28.80 | k |
2014 | 25.13 | 27.25 | 29.10 | 31.90 | 39.87 | 45.13 | 57.65 | 53.16 | 48.77 | 37.37 | l | 28.60 | t | 28.77 | 38.67 | b | ||||||||||
2015 | 26.54 | e | 30.23 | b | 30.64 | c | 29.83 | 41.19 | 51.21 | b | 54.13 | 53.03 | 45.20 | 40.25 | o | 24.50 | l | 22.39 | 38.44 | b | ||||||
2016 | 23.30 | u | 26.08 | p | 28.44 | o | 34.07 | o | 36.22 | m | 45.18 | h | 51.22 | v | 50.47 | n | 42.58 | r | 34.38 | o | 29.19 | n | 16.81 | o | ----- | z |
2017 | 17.00 | k | 27.82 | k | 30.57 | j | 31.67 | o | 39.71 | n | 44.26 | k | 54.15 | r | 55.25 | g | 48.40 | 33.57 | j | 31.48 | g | 22.90 | b | 35.65 | j | |
2018 | 29.00 | 21.68 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.50 | u | 29.23 | 24.48 | j | 26.64 | i | |||
2019 | 27.33 | a | 16.50 | r | 28.06 | 37.56 | c | 39.65 | 46.13 | 51.94 | 53.15 | d | 43.93 | 30.97 | 31.62 | i | 26.10 | 38.48 | b | |||||||
2020 | 27.56 | d | ----- | z | ----- | z | ----- | z | ----- | z | 41.50 | x | 49.30 | u | ----- | z | 50.83 | a | 38.93 | d | 28.57 | ----- | z | 36.47 | h | |
2021 | ----- | z | 26.16 | c | 25.50 | g | 34.41 | a | 42.24 | b | 52.10 | j | 60.00 | b | 54.83 | a | 47.15 | d | 38.12 | e | 32.19 | c | 25.55 | 40.07 | c | |
2022 | 27.26 | d | 25.69 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.50 | x | ----- | z | 22.66 | a | 22.52 | 24.53 | h | |
2023 | 22.45 | 22.96 | 23.74 | 32.64 | h | 42.72 | b | 49.33 | x | ----- | z | ----- | z | ----- | z | 39.20 | a | ----- | z | ----- | z | 30.22 | g | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.66 | 24.99 | 27.52 | 31.44 | 38.30 | 44.69 | 51.66 | 50.68 | 44.85 | 36.11 | 28.20 | 22.88 | 34.94 | |||||||||||||
S.D. | 4.17 | 3.32 | 2.84 | 3.43 | 2.66 | 2.72 | 2.94 | 2.51 | 2.97 | 2.75 | 2.73 | 3.54 | 1.11 | |||||||||||||
SKEW | -0.56 | 0.19 | 0.37 | 0.11 | -0.09 | 0.25 | 0.21 | 0.32 | -0.24 | 0.31 | -0.16 | -0.73 | 0.21 | |||||||||||||
MAX | 29.86 | 33.18 | 34.06 | 38.15 | 45.19 | 51.21 | 60.00 | 56.03 | 50.83 | 43.03 | 34.61 | 28.77 | 37.06 | |||||||||||||
MIN | 9.35 | 16.76 | 22.48 | 24.31 | 31.75 | 38.11 | 45.20 | 46.17 | 38.43 | 30.81 | 20.90 | 13.00 | 32.90 | |||||||||||||
YRS | 55 | 56 | 54 | 52 | 53 | 49 | 50 | 52 | 57 | 48 | 54 | 52 | 25 |