YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1956 | ----- | z | ----- | z | 26.60 | f | 34.37 | 42.26 | 44.90 | 53.06 | 49.48 | 43.83 | 35.10 | 25.38 | a | 23.67 | j | 41.05 | d | |||||||
1957 | ----- | z | ----- | z | 28.09 | i | 32.17 | f | 39.24 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | 33.21 | a | 42.80 | a | 46.13 | 51.19 | 50.39 | 38.17 | 32.81 | 28.43 | 30.39 | 39.28 | c | |||||||
1959 | 25.96 | c | 22.18 | 28.03 | 32.53 | 35.45 | 46.23 | 51.16 | 45.23 | 39.00 | 31.55 | 19.93 | 16.96 | g | 34.30 | a | ||||||||||
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | 40.04 | g | 42.53 | 43.87 | 43.35 | 41.23 | 34.90 | k | 26.77 | 20.39 | 36.36 | f | ||||||
1964 | 20.39 | 15.21 | 18.48 | 24.67 | 32.55 | 43.97 | 49.32 | 46.74 | 38.63 | 33.16 | 24.73 | 26.29 | 31.18 | |||||||||||||
1965 | 24.32 | 25.14 | 23.87 | 33.37 | 36.45 | 44.40 | 48.35 | 47.74 | 34.57 | 33.16 | 29.67 | 19.13 | 33.35 | |||||||||||||
1966 | 21.52 | 19.64 | 24.32 | 30.70 | 39.39 | 42.77 | 45.68 | 46.74 | 40.10 | 27.94 | 29.40 | 25.32 | 32.79 | |||||||||||||
1967 | 23.94 | 25.29 | 25.55 | 26.40 | 38.23 | 44.93 | 52.00 | 51.16 | 43.80 | 33.55 | 31.37 | 18.19 | 34.53 | |||||||||||||
1968 | 21.81 | 31.52 | 29.81 | 30.43 | 37.81 | 47.90 | 55.74 | 49.48 | 43.73 | 35.55 | 28.50 | 22.29 | 36.21 | |||||||||||||
1969 | 22.87 | a | 22.70 | a | 23.48 | 31.70 | 41.71 | 49.30 | 52.97 | 50.58 | 46.70 | 32.06 | 28.40 | 27.03 | 35.79 | |||||||||||
1970 | 26.45 | 28.71 | 29.41 | i | 28.30 | 40.39 | 49.50 | 54.65 | 51.58 | 37.67 | c | 33.35 | 32.07 | 19.29 | 36.54 | a | ||||||||||
1971 | 25.12 | e | 25.50 | 21.83 | h | 32.13 | 38.58 | 45.67 | 55.56 | d | 57.10 | 39.30 | 32.81 | 28.53 | 19.90 | 36.38 | a | |||||||||
1972 | 20.23 | 25.76 | 34.20 | f | 31.10 | 41.48 | 48.93 | c | 53.74 | 53.67 | d | 41.80 | 34.68 | 28.47 | 17.68 | 36.14 | a | |||||||||
1973 | 19.55 | 26.79 | 26.87 | 32.57 | 44.29 | 48.03 | 54.03 | 54.91 | i | 45.00 | 35.04 | h | 31.03 | 28.74 | 35.69 | b | ||||||||||
1974 | 20.61 | 24.54 | 28.97 | 31.87 | 39.42 | 50.33 | 52.39 | c | 51.94 | 46.20 | 34.55 | 30.21 | b | 23.22 | d | 36.19 | ||||||||||
1975 | 22.43 | a | 22.72 | c | 27.10 | 27.53 | 38.19 | 45.80 | 55.77 | 50.35 | 46.34 | a | 36.03 | 26.93 | 26.97 | 35.52 | ||||||||||
1976 | 24.55 | 24.52 | 23.03 | 30.00 | 40.74 | 43.90 | 55.10 | 49.48 | 47.60 | 36.65 | 30.43 | 21.39 | 35.62 | |||||||||||||
1977 | 15.65 | 26.75 | 25.10 | 34.63 | 36.00 | 52.50 | 53.84 | 55.94 | 44.90 | ----- | z | ----- | z | ----- | z | 38.37 | c | |||||||||
1978 | 26.17 | y | 28.00 | l | 34.45 | 33.90 | 37.24 | f | 43.00 | h | 52.19 | 49.30 | d | 38.44 | c | 34.31 | e | 23.33 | 18.06 | 35.50 | d | |||||
1979 | 16.74 | 26.75 | 30.52 | 33.10 | 41.10 | 45.73 | 54.23 | 51.97 | 47.37 | 41.16 | 25.37 | 25.87 | 36.66 | |||||||||||||
1980 | 24.60 | a | 31.76 | 28.32 | 35.03 | 40.81 | 42.60 | 54.87 | 49.74 | 45.40 | 37.00 | 30.97 | 27.55 | 37.39 | ||||||||||||
1981 | 25.16 | 24.18 | 28.90 | 34.53 | 39.48 | 46.83 | 51.06 | 54.23 | 45.60 | 34.32 | 30.27 | 28.74 | 36.94 | |||||||||||||
1982 | 20.77 | a | 23.63 | a | 27.84 | 28.23 | 36.97 | 46.43 | 50.27 | a | 49.81 | 38.10 | 31.38 | w | 23.30 | 21.26 | h | 34.53 | b | |||||||
1983 | 26.27 | a | 28.39 | 32.06 | 30.23 | 40.13 | 45.33 | 50.10 | 51.39 | m | 41.87 | 35.06 | 30.53 | 30.50 | y | 36.00 | b | |||||||||
1984 | 20.68 | ----- | z | ----- | z | 31.53 | 39.71 | 44.63 | 54.77 | 52.06 | 41.97 | 29.68 | f | ----- | z | ----- | z | 40.77 | e | |||||||
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.56 | e | 54.86 | b | 46.73 | e | 37.21 | a | 28.07 | a | ----- | z | 19.19 | 38.77 | f | |
1986 | 28.94 | 29.54 | ----- | z | ----- | z | 45.53 | n | 51.03 | 48.35 | ----- | z | ----- | z | 33.94 | o | 28.53 | 23.58 | 35.00 | f | ||||||
1987 | 18.71 | 25.54 | 28.94 | 36.47 | 43.00 | 47.23 | 48.39 | 49.23 | 45.47 | 39.61 | 29.41 | a | 22.90 | a | 36.24 | |||||||||||
1988 | 20.43 | a | 25.14 | 28.61 | 35.80 | 38.74 | 47.23 | 53.10 | 48.84 | 40.27 | 38.90 | 28.79 | a | 18.90 | 35.40 | |||||||||||
1989 | 14.13 | a | 9.11 | 31.67 | a | 35.60 | 38.24 | f | 48.10 | 52.52 | 47.35 | 40.07 | 33.37 | a | 24.20 | 20.23 | 32.39 | a | ||||||||
1990 | 23.35 | 17.04 | 37.60 | a | 38.23 | 36.45 | 43.00 | 50.90 | 50.48 | 41.87 | 30.94 | 16.57 | 5.94 | 32.70 | ||||||||||||
1991 | 20.26 | ----- | z | ----- | z | 31.20 | 35.70 | a | ----- | z | ----- | z | ----- | z | ----- | z | 35.61 | 30.57 | b | 23.81 | 29.52 | f | ||||
1992 | 23.97 | ----- | z | 29.37 | a | 33.83 | a | ----- | z | 42.95 | i | 47.68 | l | 52.11 | m | 41.90 | j | 37.40 | f | 25.53 | k | 16.44 | m | 29.05 | i | |
1993 | ----- | z | 13.31 | l | 31.68 | i | 29.79 | p | 39.07 | p | 41.00 | o | 45.00 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | 23.48 | j | 18.00 | l | 30.35 | k | 33.07 | p | 40.07 | q | 43.00 | l | 52.85 | r | 49.86 | q | 44.77 | q | 30.38 | r | 11.89 | u | 16.47 | l | ----- | z |
1995 | 27.26 | d | 32.67 | m | 28.00 | q | 31.00 | r | 41.33 | v | 41.00 | t | 50.20 | u | 49.29 | q | 44.38 | q | 32.39 | m | 30.00 | p | 25.79 | l | 27.26 | k |
1996 | 20.20 | u | 23.41 | l | 25.38 | o | 30.53 | o | 33.75 | w | ----- | z | ----- | z | ----- | z | ----- | z | 34.38 | r | 27.75 | r | 24.31 | r | ----- | z |
1997 | 20.45 | i | 22.88 | k | 27.95 | l | 29.72 | l | 45.50 | q | ----- | z | 52.86 | q | 53.73 | p | 43.93 | p | 34.27 | p | 33.14 | p | 22.88 | o | ----- | z |
1998 | 25.29 | q | 19.19 | a | 26.53 | a | 33.05 | i | 36.00 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.00 | m | 20.30 | h | 22.86 | j |
1999 | 23.52 | f | 19.40 | m | 27.14 | i | 28.45 | j | ----- | z | 42.53 | o | 49.69 | o | 49.12 | o | 39.33 | o | 33.50 | o | 31.41 | a | 20.65 | 26.03 | j | |
2000 | 24.87 | 28.93 | 26.84 | 33.67 | o | 38.83 | a | 46.35 | g | ----- | z | 48.76 | n | 43.19 | i | 34.96 | d | 23.26 | g | 23.71 | n | 30.89 | g | |||
2001 | 21.10 | a | 21.61 | 28.96 | c | 29.00 | d | 41.43 | j | 43.40 | j | 51.45 | i | ----- | z | 43.29 | p | 38.64 | q | 27.20 | j | 25.00 | i | 25.17 | h | |
2002 | 21.39 | c | 23.46 | d | 25.27 | i | 33.70 | t | 35.17 | m | 43.48 | g | ----- | z | ----- | z | 43.27 | o | 31.42 | l | 27.91 | h | 28.23 | e | 24.36 | i |
2003 | 29.67 | g | 24.64 | 29.83 | b | 31.04 | b | 36.64 | i | 46.60 | e | ----- | z | ----- | z | 41.95 | j | 37.92 | f | 22.75 | f | 26.32 | f | 33.03 | h | |
2004 | 22.81 | 24.94 | k | 31.62 | e | 33.80 | o | 39.07 | d | 45.17 | g | 53.04 | g | 51.72 | f | 40.22 | g | 34.57 | h | 25.19 | i | 23.81 | e | 29.33 | h | |
2005 | 23.11 | d | 22.75 | d | 28.89 | d | 30.88 | e | 39.07 | d | 41.96 | c | 55.24 | b | ----- | z | 37.36 | p | 34.17 | m | 27.71 | b | 22.77 | a | 32.49 | c |
2006 | 24.78 | d | 19.36 | f | 23.36 | c | 30.53 | k | 40.13 | p | 48.62 | d | 56.24 | f | ----- | z | 44.40 | y | 33.29 | g | 27.39 | l | 19.46 | g | 32.25 | i |
2007 | 16.58 | g | 24.85 | b | 29.77 | e | 31.08 | d | 37.87 | h | 42.92 | e | ----- | z | 52.92 | r | 37.87 | o | 33.24 | j | 27.33 | c | 17.62 | e | 28.93 | f |
2008 | 16.84 | 22.24 | 24.61 | 29.54 | f | 39.84 | f | 44.42 | d | 53.87 | 50.86 | q | 42.55 | s | 36.38 | g | 31.54 | d | 18.57 | c | 30.30 | e | ||||
2009 | 21.16 | 23.35 | b | 24.97 | b | 28.11 | k | 39.93 | p | 45.43 | p | 51.93 | p | ----- | z | 45.20 | o | 32.35 | n | 24.42 | k | 16.87 | h | 23.16 | i | |
2010 | 29.08 | e | 25.24 | c | 23.67 | j | 27.12 | m | 30.86 | q | 42.93 | p | 49.89 | v | 49.94 | n | 42.50 | n | 34.73 | p | 22.05 | k | 28.13 | h | 27.16 | j |
2011 | 21.07 | d | 20.57 | 28.23 | 27.25 | j | 32.47 | p | ----- | z | 51.07 | p | 51.25 | w | 45.93 | o | 33.67 | m | 25.65 | d | 16.39 | c | 22.38 | g | ||
2012 | 22.07 | b | 19.86 | a | 25.10 | a | 33.89 | l | 38.12 | o | 40.27 | s | 54.86 | q | 52.41 | n | ----- | z | 34.60 | k | 28.05 | h | 21.71 | 22.18 | h | |
2013 | 15.14 | b | 21.37 | a | 26.46 | g | 29.76 | m | 38.18 | n | 44.00 | x | ----- | z | ----- | z | 42.92 | q | 29.06 | n | 21.89 | k | 14.57 | a | 17.02 | i |
2014 | 23.86 | b | 26.74 | a | 27.85 | k | 31.88 | m | 37.73 | p | 44.20 | o | 55.83 | m | 51.46 | r | ----- | z | ----- | z | ----- | z | 28.32 | 26.31 | i | |
2015 | 27.00 | a | 28.70 | e | 28.12 | n | 28.67 | o | 37.50 | q | 51.93 | o | 52.88 | o | 52.09 | t | 43.00 | m | 38.81 | o | 22.18 | h | 23.19 | d | 26.29 | i |
2016 | 22.26 | 28.00 | 29.94 | 33.36 | s | 38.39 | m | 46.18 | m | ----- | z | 50.62 | r | 40.80 | y | 36.56 | v | 26.95 | h | 15.13 | h | 26.73 | i | |||
2017 | 16.26 | 25.85 | b | 31.57 | a | 31.78 | l | 36.68 | l | ----- | z | 55.88 | w | 55.29 | n | 44.86 | p | 29.29 | n | 30.65 | j | 17.52 | b | 22.80 | h | |
2018 | 28.29 | c | 18.18 | 23.55 | b | 30.81 | n | 41.21 | q | 45.31 | q | 50.67 | y | 48.17 | y | 39.21 | p | 34.00 | k | 25.85 | j | 22.35 | 23.09 | h | ||
2019 | 23.30 | a | 18.40 | c | 24.73 | a | 35.18 | s | 44.57 | q | 48.83 | x | ----- | z | ----- | z | ----- | z | 26.28 | m | 21.64 | p | 24.82 | i | 22.14 | i |
2020 | 25.21 | g | 21.04 | e | 32.92 | g | 39.00 | h | 45.75 | o | 52.93 | o | 65.14 | q | 65.67 | y | ----- | z | ----- | z | ----- | z | ----- | z | 21.04 | k |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.27 | s | 56.55 | i | 57.94 | o | 46.71 | p | 36.15 | r | 19.54 | q | 13.73 | i | ----- | z |
2023 | 20.08 | e | 18.47 | i | 19.00 | h | 27.71 | m | 41.69 | o | 43.73 | s | 55.53 | p | 55.73 | t | 43.12 | v | 34.41 | n | 24.08 | r | 29.41 | i | 20.08 | k |
2024 | 29.75 | k | 27.32 | g | 28.86 | j | 31.08 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.31 | 23.84 | 27.73 | 31.92 | 39.16 | 46.20 | 52.22 | 50.02 | 42.07 | 34.31 | 27.82 | 21.97 | 35.10 | |||||||||||||
S.D. | 3.54 | 4.31 | 3.56 | 2.94 | 2.57 | 2.59 | 2.94 | 3.03 | 3.53 | 2.97 | 3.45 | 4.78 | 1.81 | |||||||||||||
SKEW | -0.27 | -0.87 | 0.15 | -0.26 | -0.31 | 0.40 | -1.01 | 0.22 | -0.13 | 0.04 | -1.36 | -0.70 | -0.82 | |||||||||||||
MAX | 29.08 | 31.76 | 37.60 | 38.23 | 44.29 | 52.50 | 55.77 | 57.10 | 47.60 | 41.16 | 32.07 | 30.39 | 37.39 | |||||||||||||
MIN | 14.13 | 9.11 | 18.48 | 24.67 | 32.55 | 41.96 | 43.87 | 43.35 | 34.57 | 27.94 | 16.57 | 5.94 | 31.18 | |||||||||||||
YRS | 48 | 45 | 39 | 34 | 30 | 35 | 33 | 28 | 30 | 27 | 34 | 39 | 15 |