YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1961 | ----- | z | ----- | z | ----- | z | 27.42 | r | 35.35 | 46.50 | 46.39 | 48.48 | 34.17 | 29.77 | 20.13 | 21.42 | 35.28 | d | ||||||||
1962 | 10.26 | 23.75 | 26.26 | 31.17 | 34.39 | 38.93 | 44.06 | 43.58 | 38.37 | 31.13 | 28.93 | 25.06 | 31.32 | |||||||||||||
1963 | 10.32 | 32.86 | 26.77 | 30.00 | 39.13 | 41.80 | 43.48 | 43.19 | 44.63 | 34.84 | 28.80 | 19.97 | 32.98 | |||||||||||||
1964 | 20.16 | 18.28 | 22.55 | 24.73 | 30.61 | 42.77 | 47.52 | 43.23 | 31.93 | 29.35 | 24.10 | 23.40 | a | 29.89 | ||||||||||||
1965 | 25.32 | 23.43 | 20.48 | 33.10 | 31.45 | 41.23 | 46.29 | 46.42 | 31.87 | 29.23 | 30.00 | 17.97 | 31.40 | |||||||||||||
1966 | 20.52 | 19.61 | 24.23 | 25.03 | 33.81 | 41.00 | 42.97 | 43.52 | 40.34 | a | 28.00 | 31.10 | 26.32 | 31.37 | ||||||||||||
1967 | 26.77 | 24.89 | 24.90 | 25.77 | 34.23 | 42.53 | 48.58 | 46.23 | 38.93 | 28.67 | a | 24.77 | 13.83 | a | 31.68 | |||||||||||
1968 | 20.16 | 27.10 | 25.48 | 25.63 | 34.00 | 41.73 | 47.84 | 46.42 | 38.13 | 30.84 | 30.07 | 22.81 | 32.52 | |||||||||||||
1969 | 21.77 | 24.29 | 22.74 | 28.73 | 37.00 | 45.93 | 45.84 | 43.48 | 39.83 | 27.29 | 20.93 | 22.81 | 31.72 | |||||||||||||
1970 | 25.32 | 25.11 | 25.27 | a | 23.64 | b | 34.90 | 45.27 | 47.57 | a | 43.55 | 33.31 | a | 27.48 | 28.33 | 17.71 | 31.46 | |||||||||
1971 | 22.77 | 20.86 | 22.23 | 27.04 | c | 35.19 | 40.45 | a | 48.32 | 49.65 | 33.03 | 28.32 | 25.10 | 17.71 | 30.89 | |||||||||||
1972 | 15.97 | a | 25.52 | 29.45 | 25.45 | a | 34.70 | a | 41.60 | e | 45.96 | d | 45.46 | e | 31.12 | f | 27.47 | a | 27.93 | b | 13.34 | b | 30.26 | a | ||
1973 | 19.83 | a | 26.46 | 24.39 | 26.47 | 37.84 | 41.70 | 45.74 | 44.58 | 37.73 | 30.81 | 29.80 | 28.74 | 32.84 | ||||||||||||
1974 | 17.55 | 23.43 | 27.00 | 28.27 | 32.26 | 44.60 | 46.03 | 44.77 | 35.80 | 25.73 | a | 25.67 | 20.19 | 30.94 | ||||||||||||
1975 | 19.65 | 25.11 | 24.55 | 25.07 | 32.52 | 39.73 | 51.55 | 43.00 | 36.87 | 34.47 | a | 24.13 | 25.65 | 31.86 | ||||||||||||
1976 | 24.00 | 24.52 | 21.13 | 27.53 | 34.90 | 37.53 | 48.03 | 45.52 | 41.87 | 28.74 | 23.43 | 14.71 | c | 30.99 | ||||||||||||
1977 | 11.79 | g | 22.04 | 20.77 | 29.63 | 35.13 | 46.77 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.87 | g | ||||
1978 | ----- | z | ----- | z | 28.82 | c | 31.07 | 31.05 | j | 41.73 | 46.74 | 44.90 | 35.25 | j | 24.17 | g | 15.87 | 13.39 | 31.79 | e | ||||||
1979 | 11.06 | 26.14 | 27.68 | i | 30.07 | 36.68 | 41.50 | 48.13 | a | 46.61 | 41.38 | a | 36.37 | a | 20.47 | 23.57 | a | 32.91 | a | |||||||
1980 | 19.13 | a | 29.93 | a | 24.03 | b | 32.30 | 36.00 | 40.87 | 48.90 | 42.06 | 37.69 | a | 30.17 | a | 26.87 | 20.71 | 32.39 | ||||||||
1981 | 21.40 | a | 18.79 | 24.58 | 29.75 | b | 34.94 | 40.66 | a | 43.87 | a | 47.53 | a | 37.67 | 29.13 | 26.31 | a | 26.77 | a | 31.78 | ||||||
1982 | 17.67 | d | 24.20 | c | 25.96 | c | 24.38 | d | 31.85 | e | 43.90 | a | 46.93 | b | 46.17 | b | 35.18 | b | 30.41 | b | 19.69 | d | 20.44 | f | 31.49 | a |
1983 | 27.48 | f | 30.13 | e | 32.67 | d | 27.96 | c | 36.13 | a | 40.63 | 44.67 | a | 49.35 | 35.31 | a | 30.76 | f | 30.96 | g | 20.57 | c | 35.27 | c | ||
1984 | 17.68 | f | 22.09 | f | 28.90 | b | 29.46 | b | 36.21 | b | 38.81 | c | 48.53 | a | 45.67 | d | 36.04 | f | 29.46 | g | 28.12 | d | 11.82 | c | 33.44 | d |
1985 | 10.24 | b | 14.87 | e | 22.32 | 31.70 | 34.10 | a | 41.90 | 50.84 | 43.55 | 33.97 | 26.39 | 15.37 | c | 13.03 | b | 28.19 | ||||||||
1986 | 26.40 | a | 28.26 | a | 30.38 | b | 28.83 | a | 36.97 | a | 47.76 | a | 45.63 | a | 48.97 | b | 34.93 | 28.67 | a | 26.89 | b | 16.16 | f | 34.88 | a | |
1987 | 16.68 | i | 21.57 | e | 28.88 | g | 31.91 | g | 39.19 | d | 45.62 | d | 45.22 | d | 44.84 | f | 37.85 | c | 28.37 | d | 24.14 | h | 20.84 | f | 36.30 | f |
1988 | 16.27 | i | 21.52 | b | 23.42 | e | 31.75 | b | 34.17 | b | 44.21 | b | 48.52 | d | 43.54 | c | 34.42 | d | 32.00 | a | 29.70 | c | 16.33 | g | 34.33 | b |
1989 | 13.52 | h | 13.45 | f | 30.67 | g | 30.89 | c | 33.77 | 42.66 | a | 45.59 | b | 43.64 | c | 36.97 | a | 31.04 | e | 18.65 | d | 14.32 | f | 35.40 | d | |
1990 | 21.37 | a | 16.39 | 21.80 | a | 31.75 | b | 32.90 | a | 40.79 | b | 48.68 | 47.80 | a | 39.24 | a | 25.90 | 22.04 | b | 7.48 | b | 29.68 | ||||
1991 | 13.71 | 23.36 | 22.87 | a | 27.21 | a | 32.77 | a | 38.23 | 50.06 | 49.57 | c | 38.79 | b | 30.13 | a | 28.12 | d | 17.39 | 31.02 | ||||||
1992 | 19.93 | b | 26.31 | 24.07 | b | 30.26 | c | 36.04 | c | 45.85 | c | 46.81 | 46.43 | a | 35.18 | b | 33.21 | c | 21.40 | 14.63 | a | 31.68 | ||||
1993 | 14.31 | b | 15.21 | 29.81 | 29.10 | 38.74 | 39.12 | d | 40.55 | 45.77 | 38.07 | a | 31.87 | a | 13.68 | b | 20.19 | 29.70 | ||||||||
1994 | 19.74 | 18.11 | a | 24.87 | a | 31.27 | 38.43 | c | 41.97 | a | 48.20 | f | 44.26 | 39.52 | c | 25.41 | b | 19.57 | b | 18.81 | d | 29.27 | a | |||
1995 | 27.48 | b | 24.76 | c | 24.58 | 26.33 | 36.06 | ----- | z | ----- | z | 41.55 | 40.00 | 25.65 | 24.79 | b | 24.03 | 29.52 | b | |||||||
1996 | 24.55 | 23.34 | 24.48 | 27.57 | i | 31.84 | ----- | z | ----- | z | ----- | z | ----- | z | 25.69 | o | 24.44 | l | 26.81 | 26.20 | g | |||||
1997 | 21.26 | 22.18 | 27.23 | 27.18 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.46 | h | |||
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.59 | m | 16.70 | a | 16.70 | k |
1999 | 20.77 | 19.44 | c | 26.85 | d | 25.06 | m | 29.60 | p | 36.22 | l | 42.00 | q | ----- | z | 30.67 | o | 28.20 | p | 26.12 | m | 14.71 | g | 22.36 | i | |
2000 | 19.07 | c | 23.33 | e | 20.04 | d | 26.38 | q | 36.07 | q | 40.00 | q | ----- | z | 40.08 | s | 35.65 | m | 27.93 | p | 17.52 | i | 20.79 | c | 20.81 | h |
2001 | 14.64 | i | 18.33 | a | 24.05 | j | 23.69 | n | 33.56 | m | 36.71 | p | ----- | z | 42.56 | v | 39.29 | w | 27.53 | l | 20.84 | k | 22.48 | d | 20.41 | j |
2002 | 21.64 | f | 19.27 | b | 19.75 | k | 23.31 | n | 27.44 | o | 36.47 | o | 47.71 | q | 39.07 | p | 35.43 | i | 21.00 | j | 19.40 | e | 21.82 | c | 20.16 | i |
2003 | 29.23 | a | 18.05 | f | 24.92 | g | 28.50 | l | 33.40 | k | 39.82 | h | 49.56 | o | 46.43 | q | 39.29 | i | 30.17 | h | 21.83 | f | ----- | z | 29.23 | k |
2004 | 21.28 | f | 22.81 | c | 24.94 | m | 28.75 | n | 33.95 | k | 40.87 | o | 49.67 | m | 49.29 | j | 36.12 | d | 30.95 | l | 20.84 | e | 22.73 | a | 25.62 | h |
2005 | 20.86 | b | 18.12 | b | 24.09 | i | 28.79 | k | 36.35 | h | 39.23 | h | 48.67 | s | 47.83 | m | 32.69 | n | 30.00 | j | 23.16 | k | 18.91 | h | 19.49 | j |
2006 | 27.23 | a | 18.21 | i | 25.56 | f | 28.18 | m | 35.30 | k | 44.44 | l | 50.18 | t | 42.25 | o | 34.44 | n | 25.17 | h | 29.56 | e | 17.27 | a | 24.69 | i |
2007 | 9.83 | b | 19.62 | d | 25.96 | f | 23.89 | l | ----- | z | 39.12 | m | 51.04 | g | 42.94 | o | 35.18 | m | 29.00 | l | 17.29 | i | 15.53 | a | 15.00 | i |
2008 | 11.63 | d | 23.62 | c | 20.22 | d | 20.48 | g | 31.13 | p | 36.00 | t | 47.42 | l | 45.33 | p | 33.94 | n | 25.43 | x | 22.52 | g | 15.26 | d | 17.68 | h |
2009 | 16.58 | e | 19.73 | b | 23.17 | m | 24.39 | l | 27.73 | t | 42.41 | m | 45.22 | v | 46.12 | o | 37.29 | w | 27.71 | n | 19.85 | j | 10.85 | e | 15.72 | i |
2010 | 28.36 | i | 23.57 | e | 20.19 | o | 24.13 | o | 25.50 | w | 37.75 | r | 42.67 | s | 45.25 | o | 34.08 | q | ----- | z | 21.55 | h | 27.12 | f | 23.57 | k |
2011 | 17.44 | d | 18.85 | b | 28.32 | c | 23.53 | k | 25.11 | m | 35.17 | l | 40.57 | q | ----- | z | ----- | z | 31.29 | x | 22.69 | d | 9.30 | a | 19.32 | g |
2012 | 15.67 | a | 12.48 | f | 20.37 | d | 30.47 | o | 32.00 | q | 37.20 | e | 45.43 | a | 43.75 | s | 32.43 | w | 26.84 | f | 23.84 | e | 21.03 | 27.26 | f | |
2013 | 8.57 | a | 20.32 | 22.00 | a | ----- | z | ----- | z | 43.87 | 52.07 | a | ----- | z | 41.63 | ----- | z | ----- | z | 7.79 | c | 28.03 | e | |||
2014 | 14.83 | b | 21.85 | b | 24.68 | 27.28 | l | 32.13 | p | ----- | z | 50.55 | 45.96 | c | 39.33 | 33.74 | 24.70 | 27.42 | 31.45 | c | ||||||
2015 | 24.87 | a | 27.70 | a | 27.59 | d | 23.00 | 37.03 | a | 44.91 | s | 46.70 | u | 48.97 | 38.00 | c | 36.35 | 17.50 | 26.56 | f | 31.22 | c | ||||
2016 | 25.82 | c | 26.00 | b | 26.42 | 29.80 | 36.32 | 44.43 | 46.87 | 45.45 | 33.75 | b | 34.39 | 29.57 | 10.87 | 32.47 | ||||||||||
2017 | 18.56 | o | 27.58 | d | ----- | z | 29.14 | w | 30.14 | j | ----- | z | ----- | z | 50.23 | a | 40.67 | 26.23 | 28.50 | 10.22 | m | 34.64 | g | |||
2018 | 26.48 | h | 24.58 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | 29.25 | v | 36.16 | ----- | z | ----- | z | 48.58 | e | 40.93 | 19.00 | b | 17.80 | 21.45 | 30.65 | f | ||||
2020 | 25.45 | 15.46 | e | 21.23 | 24.87 | 36.77 | 42.03 | 46.61 | 47.16 | 37.50 | 25.87 | 22.27 | 19.65 | 30.41 | ||||||||||||
2021 | 20.43 | a | 23.07 | 22.39 | 25.17 | a | 36.45 | 49.87 | 52.68 | l | ----- | z | ----- | z | 31.26 | 27.50 | 21.42 | 28.62 | c | |||||||
2022 | 19.29 | 16.21 | 26.13 | 25.61 | b | 32.68 | 43.87 | 51.06 | 53.13 | 43.80 | 31.26 | 16.00 | 20.39 | 31.62 | ||||||||||||
2023 | 23.84 | 19.82 | 23.90 | 32.60 | 41.42 | 45.87 | 52.00 | 51.50 | c | 41.03 | 34.39 | 25.37 | 28.97 | 35.06 | ||||||||||||
2024 | 28.77 | 28.72 | 26.97 | 28.33 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.16 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.77 | 22.70 | 24.81 | 28.24 | 35.26 | 42.52 | 47.19 | 46.08 | 37.70 | 29.73 | 24.05 | 19.24 | 31.43 | |||||||||||||
S.D. | 5.46 | 4.06 | 2.96 | 2.79 | 2.33 | 2.86 | 2.57 | 2.67 | 3.10 | 3.49 | 4.64 | 5.45 | 1.33 | |||||||||||||
SKEW | -0.34 | 0.09 | 0.41 | -0.05 | 0.25 | 0.34 | -0.06 | 0.57 | 0.04 | -0.32 | -0.41 | -0.30 | 0.14 | |||||||||||||
MAX | 29.23 | 32.86 | 32.67 | 33.10 | 41.42 | 49.87 | 52.07 | 53.13 | 44.63 | 36.37 | 31.10 | 28.97 | 35.06 | |||||||||||||
MIN | 8.57 | 14.87 | 20.04 | 23.00 | 30.61 | 37.20 | 40.55 | 41.55 | 31.87 | 19.00 | 13.68 | 7.48 | 28.19 | |||||||||||||
YRS | 48 | 54 | 47 | 40 | 42 | 41 | 39 | 41 | 41 | 40 | 46 | 49 | 25 |