YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1969 | ----- | z | ----- | z | ----- | z | ----- | z | 34.35 | 39.43 | 50.97 | 51.81 | 42.87 | 30.00 | 24.04 | e | 19.52 | h | 39.07 | e | ||||||
1970 | 13.00 | i | 22.95 | i | 19.13 | 22.17 | 33.90 | 40.21 | a | 49.74 | 50.68 | 39.63 | 28.68 | 24.13 | 17.45 | k | 34.25 | c | ||||||||
1971 | 17.48 | d | 15.04 | e | 19.68 | 25.67 | 30.00 | 37.90 | 48.32 | 49.26 | 40.67 | 28.77 | 21.67 | 15.32 | 29.15 | |||||||||||
1972 | 16.63 | a | 17.12 | e | 24.87 | 25.87 | 29.61 | 42.67 | 49.58 | 45.77 | 39.77 | 34.39 | 17.07 | 11.29 | 29.55 | |||||||||||
1973 | 7.97 | 14.41 | a | 13.07 | a | 22.73 | d | 35.48 | d | 42.68 | b | 48.42 | 46.81 | 38.63 | 30.97 | 22.80 | e | 14.47 | l | 29.45 | a | |||||
1974 | 13.58 | 14.55 | h | 24.33 | a | 25.69 | a | 34.17 | a | 45.13 | 48.39 | 45.70 | a | 42.13 | 33.97 | a | 24.71 | b | 15.36 | i | 33.78 | b | ||||
1975 | 13.89 | c | 11.36 | c | 18.59 | b | 20.39 | g | 30.13 | 38.37 | 49.23 | 44.61 | 42.33 | 30.42 | 21.93 | b | ----- | z | 30.09 | b | ||||||
1976 | 14.09 | i | 19.19 | c | 18.84 | f | 24.80 | e | 34.84 | ----- | z | 50.13 | 44.27 | a | 40.57 | 30.61 | 21.59 | c | 14.19 | j | 33.25 | d | ||||
1977 | 9.00 | f | 17.26 | a | 16.55 | k | 26.29 | b | 27.39 | 39.73 | 49.48 | 47.84 | 41.67 | 33.27 | a | 23.00 | j | 20.68 | i | 35.37 | d | |||||
1978 | 16.37 | d | 16.96 | b | 25.83 | a | 27.21 | a | 32.13 | 41.47 | 48.06 | 46.28 | b | 40.70 | ----- | z | 22.67 | 8.78 | h | 31.77 | b | |||||
1979 | 7.54 | e | 7.60 | h | 20.17 | h | 23.42 | k | 34.17 | b | 40.13 | 46.48 | 44.48 | 42.27 | 30.45 | 20.47 | 19.04 | h | 33.25 | d | ||||||
1980 | 19.91 | h | 20.19 | b | 20.27 | i | 22.59 | h | 30.57 | a | 40.10 | 49.00 | 47.90 | a | 40.00 | ----- | z | 22.07 | a | 23.26 | 34.13 | d | ||||
1981 | 19.71 | 18.89 | 18.17 | b | 30.13 | 34.10 | 45.67 | 50.90 | 48.06 | 41.93 | 31.19 | 25.18 | b | 17.33 | g | 33.09 | a | |||||||||
1982 | 15.48 | f | 16.72 | c | 22.41 | b | 26.43 | i | 33.06 | 36.87 | 45.67 | a | 49.97 | 43.00 | a | 27.19 | 24.38 | a | 10.08 | e | 30.93 | b | ||||
1983 | 16.29 | j | 14.58 | i | 24.00 | i | 21.57 | i | 32.86 | b | 38.67 | 49.52 | 48.07 | a | 45.60 | 33.23 | a | 22.75 | b | 17.46 | g | 38.67 | e | |||
1984 | 17.17 | h | 17.65 | i | 20.64 | i | 24.72 | a | 36.74 | 40.23 | 50.29 | 47.90 | 43.50 | 28.03 | b | 18.21 | b | 15.39 | c | 33.89 | c | |||||
1985 | 14.41 | i | 10.44 | j | 20.45 | i | 29.96 | g | 34.10 | 43.60 | 50.60 | a | 47.65 | 37.07 | 32.43 | a | 20.93 | a | 18.80 | k | 38.05 | e | ||||
1986 | 22.59 | i | 17.53 | i | 23.35 | k | 28.91 | h | 34.55 | 42.45 | a | 48.42 | 49.59 | b | 39.33 | 29.42 | e | 24.81 | c | 17.14 | j | 38.37 | e | |||
1987 | 11.35 | n | 18.07 | m | 15.95 | i | 29.14 | h | 33.40 | a | 40.22 | c | 44.17 | a | 46.58 | 38.96 | b | 34.43 | a | 22.19 | d | 13.27 | i | 37.14 | e | |
1988 | 14.95 | l | 17.91 | f | 21.17 | h | 29.19 | i | 32.29 | c | 43.00 | b | 49.83 | b | 48.77 | e | 37.74 | c | 35.39 | c | 21.12 | f | 12.12 | n | 41.17 | f |
1989 | 13.33 | m | 15.19 | l | 24.57 | j | 30.79 | k | 34.55 | k | 38.97 | 49.43 | c | 45.62 | b | 40.68 | b | 30.58 | g | 20.05 | k | 15.00 | l | 43.67 | h | |
1990 | 11.67 | m | 13.80 | w | 20.78 | m | 28.33 | i | 31.35 | h | 44.04 | e | 50.42 | l | 45.73 | e | 43.57 | b | 30.81 | d | 23.57 | i | 12.80 | k | 41.04 | h |
1991 | 13.63 | l | 35.25 | 16.84 | f | 23.97 | a | 30.76 | f | 36.64 | b | 47.48 | d | 48.59 | d | 41.85 | c | 33.20 | f | 20.29 | m | 12.57 | j | 38.96 | f | |
1992 | 7.62 | j | 12.47 | j | 18.41 | i | 26.73 | h | 33.50 | m | 37.92 | d | 46.04 | d | 47.92 | f | 39.27 | d | 30.85 | d | 17.31 | n | 12.08 | f | 38.52 | h |
1993 | 18.15 | e | 36.48 | a | 22.30 | d | 29.19 | c | 35.07 | b | 40.21 | a | 47.11 | c | 47.33 | d | 39.79 | a | 31.70 | a | 20.21 | a | 16.19 | e | 31.98 | |
1994 | 18.52 | 11.73 | f | 24.60 | a | 28.59 | a | 33.84 | 46.46 | b | 48.07 | a | 52.00 | c | 42.44 | e | 29.58 | e | 20.30 | c | 20.50 | e | 33.17 | a | ||
1995 | 16.97 | b | 23.54 | b | 26.04 | c | 26.89 | b | 31.23 | e | 38.17 | a | 46.79 | b | 52.15 | d | 43.38 | d | 32.27 | i | 27.93 | b | 19.62 | g | 33.31 | b |
1996 | 18.00 | 23.62 | 23.28 | b | 28.36 | b | 35.78 | h | 43.69 | q | ----- | z | 48.96 | e | 42.46 | b | 31.21 | c | 24.46 | d | ----- | z | 30.04 | d | ||
1997 | 17.50 | c | 16.69 | b | 24.04 | c | 27.62 | d | 38.43 | a | 39.92 | f | 46.97 | b | 49.65 | 45.47 | 28.59 | b | 22.41 | h | 14.30 | d | 30.92 | b | ||
1998 | 15.50 | g | 13.81 | b | 18.74 | d | 22.00 | a | 32.10 | 37.00 | e | 49.95 | j | 49.70 | a | 42.19 | d | 29.74 | d | 20.76 | i | 13.56 | o | 30.66 | d | |
1999 | 17.35 | e | 18.52 | a | 21.55 | b | 20.64 | h | 31.68 | 38.56 | e | 49.25 | g | 45.44 | o | 39.29 | m | 27.82 | n | 20.22 | l | 13.42 | l | 25.53 | g | |
2000 | 14.79 | l | 17.65 | i | 16.30 | k | 27.95 | k | 33.71 | j | 44.04 | d | 47.32 | f | 48.53 | a | 44.63 | c | 33.29 | c | 15.89 | k | 20.00 | l | 42.62 | h |
2001 | 17.50 | i | 18.33 | g | 24.00 | g | 31.76 | e | 40.46 | c | 44.23 | 51.03 | 50.00 | b | 41.70 | 30.55 | k | 24.86 | i | 9.00 | p | 43.20 | f | |||
2002 | 10.76 | n | 13.80 | m | 13.80 | p | 23.25 | j | 23.36 | f | 33.89 | l | 45.84 | f | 41.38 | e | 36.04 | f | 22.57 | h | 16.75 | f | 7.61 | h | 41.38 | k |
2003 | 15.28 | m | 12.12 | k | 12.52 | j | 16.90 | i | 28.73 | i | 35.69 | d | 45.41 | b | 43.42 | 36.50 | 29.19 | 15.90 | 9.62 | b | 30.82 | e | ||||
2004 | 10.73 | i | 8.07 | n | 18.14 | j | 28.33 | r | 34.18 | n | 39.14 | p | 47.57 | q | 48.48 | j | 42.08 | q | 32.70 | k | 22.00 | m | 17.56 | o | ----- | z |
2005 | 19.22 | m | 21.44 | l | 21.76 | n | 29.10 | i | 36.87 | h | 40.74 | g | 50.19 | j | 47.04 | g | 42.96 | g | 34.11 | l | 26.90 | j | 18.17 | m | ----- | z |
2006 | 15.22 | m | 20.88 | k | 20.23 | i | 29.00 | f | 37.26 | 44.57 | g | 53.06 | 49.64 | c | 40.79 | a | 32.42 | 25.37 | 17.33 | a | 36.55 | e | ||||
2007 | 13.13 | 15.92 | b | 27.17 | g | 28.13 | 36.77 | a | 44.00 | a | 52.32 | 51.80 | f | 42.43 | b | 32.20 | a | 27.48 | a | 14.17 | b | 30.66 | b | |||
2008 | 10.74 | l | 16.88 | m | 24.48 | 29.32 | b | 32.77 | a | 43.63 | 53.35 | 52.00 | 41.93 | 32.71 | q | 27.05 | i | 18.07 | b | 36.95 | d | |||||
2009 | 22.10 | 19.18 | 25.19 | d | 27.36 | h | 38.58 | e | 45.62 | q | 52.03 | 47.32 | 43.50 | 29.84 | 28.53 | k | 13.29 | 32.34 | c | |||||||
2010 | 17.23 | a | 17.54 | 20.20 | a | 26.87 | 32.06 | 42.70 | 53.35 | 50.03 | 42.83 | a | 35.48 | 26.19 | i | 24.55 | 32.99 | a | ||||||||
2011 | 14.50 | a | 15.71 | d | 25.61 | 31.07 | p | 32.97 | 40.30 | 50.55 | 51.94 | 44.07 | 32.77 | 25.60 | 15.37 | a | 31.76 | a | ||||||||
2012 | 21.32 | 18.93 | 23.13 | 30.63 | 35.77 | 44.27 | 52.03 | 51.87 | 43.50 | 33.68 | c | 24.70 | 18.03 | b | 33.16 | |||||||||||
2013 | 11.68 | 14.86 | 26.16 | 29.93 | 31.84 | 44.56 | c | 52.61 | 49.71 | 42.70 | 30.00 | 25.80 | 16.71 | 31.38 | ||||||||||||
2014 | 21.61 | 23.00 | 25.87 | 27.60 | 35.23 | 43.27 | 52.16 | 48.42 | 45.70 | 36.61 | 25.83 | 21.42 | 33.89 | |||||||||||||
2015 | 22.61 | 25.07 | 28.16 | 28.40 | 33.81 | 46.07 | 49.13 | 50.42 | 45.17 | 37.97 | a | 22.07 | 15.84 | 33.73 | ||||||||||||
2016 | 16.23 | 22.00 | 23.82 | i | 27.91 | g | 33.83 | a | 46.69 | a | 51.26 | 47.14 | j | 44.50 | 37.90 | 26.43 | 22.90 | a | 33.53 | c | ||||||
2017 | 21.67 | d | 26.32 | 27.32 | 30.80 | 36.70 | a | 47.10 | 52.81 | 49.42 | e | 41.83 | 36.39 | 31.67 | 23.48 | 35.46 | ||||||||||
2018 | 21.92 | e | 16.95 | h | 26.03 | 33.33 | 35.65 | 45.93 | 53.81 | 51.39 | 44.38 | n | 33.32 | f | 24.62 | q | 21.59 | n | 38.29 | e | ||||||
2019 | 22.10 | b | 18.57 | e | 26.00 | 31.87 | 31.52 | 41.87 | 50.65 | 51.67 | g | 45.57 | 31.23 | 25.87 | 20.42 | 31.42 | a | |||||||||
2020 | 20.77 | 21.76 | 27.38 | b | 31.73 | 38.91 | t | 44.15 | c | 51.88 | g | 52.39 | 43.14 | h | 34.55 | 27.00 | ----- | z | 32.47 | d | ||||||
2021 | 21.74 | 19.64 | c | 27.12 | w | 32.03 | 33.83 | h | 48.35 | d | 53.15 | r | 53.10 | u | ----- | z | ----- | z | 27.31 | q | ----- | z | 30.44 | h | ||
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.24 | a | 33.45 | 20.77 | 18.11 | d | 29.64 | h | ||
2023 | 15.58 | 14.79 | 20.90 | 27.87 | 34.71 | 38.03 | a | 50.00 | y | 51.23 | 41.80 | 36.11 | v | 28.36 | b | 21.10 | b | 29.44 | b | |||||||
2024 | 16.94 | 21.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.02 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.36 | 19.67 | 23.21 | 27.81 | 33.81 | 41.77 | 49.64 | 48.50 | 41.98 | 32.01 | 23.54 | 17.36 | 32.29 | |||||||||||||
S.D. | 3.98 | 5.47 | 3.49 | 3.00 | 2.59 | 3.22 | 2.38 | 2.58 | 2.30 | 2.69 | 3.25 | 4.21 | 2.19 | |||||||||||||
SKEW | -0.75 | 1.54 | -0.93 | -0.18 | 0.14 | 0.04 | -0.21 | -0.54 | -0.27 | 0.46 | -0.09 | -0.05 | -0.18 | |||||||||||||
MAX | 22.61 | 36.48 | 28.16 | 33.33 | 40.46 | 48.35 | 53.81 | 52.39 | 46.24 | 37.97 | 31.67 | 24.55 | 35.46 | |||||||||||||
MIN | 7.54 | 11.36 | 13.07 | 22.00 | 27.39 | 35.69 | 44.17 | 41.38 | 36.50 | 27.19 | 15.90 | 9.62 | 29.15 | |||||||||||||
YRS | 30 | 32 | 29 | 31 | 42 | 46 | 43 | 46 | 48 | 41 | 36 | 24 | 8 |