YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.50 | t | 57.65 | 60.52 | 55.45 | h | 45.74 | h | 33.52 | a | 18.43 | a | 42.53 | h | ||
1964 | 17.00 | 15.34 | 24.14 | c | 34.97 | 40.50 | a | 49.97 | a | 59.06 | 57.19 | 46.80 | 39.23 | 24.96 | b | 23.52 | b | 36.06 | ||||||||
1965 | 24.65 | 21.96 | a | 27.55 | 34.37 | 39.76 | b | 46.93 | 56.84 | 55.13 | a | 43.83 | 38.13 | a | 34.20 | 25.30 | a | 37.39 | ||||||||
1966 | 19.52 | 19.74 | a | 31.26 | 35.10 | 45.13 | 52.39 | b | 58.90 | 58.84 | 51.03 | 39.32 | 31.70 | 23.29 | 38.85 | |||||||||||
1967 | 20.16 | 22.50 | 31.74 | 30.24 | a | 40.19 | 49.13 | 60.23 | a | 58.42 | 51.30 | 36.32 | 31.57 | 15.42 | 37.27 | |||||||||||
1968 | 19.19 | 32.00 | 29.03 | 32.47 | 40.00 | 49.37 | 56.10 | 54.03 | 44.13 | 37.29 | 28.30 | 13.19 | j | 38.36 | a | |||||||||||
1969 | 27.56 | o | 29.33 | m | 26.53 | l | 33.17 | f | 43.65 | 48.58 | d | 57.14 | b | ----- | z | 49.90 | 34.50 | c | 27.78 | c | 21.25 | c | 40.40 | e | ||
1970 | 17.80 | f | 25.80 | h | 28.31 | e | 26.52 | e | 41.38 | g | 49.24 | e | 57.34 | b | 57.71 | 43.60 | e | 31.48 | f | 25.54 | d | 21.33 | a | 38.70 | d | |
1971 | 18.44 | d | 21.16 | c | 25.27 | a | 33.52 | a | 38.77 | 49.44 | c | 58.61 | c | 58.48 | 47.79 | a | 35.48 | 27.79 | b | 19.77 | a | 36.21 | ||||
1972 | 18.83 | b | 22.43 | a | 30.10 | 34.93 | 40.26 | 51.86 | a | 59.71 | 55.19 | 48.00 | 42.06 | 27.50 | 18.42 | 37.44 | ||||||||||
1973 | 11.90 | 27.26 | a | 28.68 | 31.93 | 44.55 | 51.45 | a | 57.42 | 56.59 | b | 46.68 | b | 35.79 | c | 29.97 | 23.34 | b | 37.13 | |||||||
1974 | 21.19 | 22.89 | 34.19 | 33.67 | 46.62 | e | 53.90 | 59.43 | a | 54.50 | c | 49.93 | a | 43.65 | 30.33 | 21.13 | 39.29 | |||||||||
1975 | 20.03 | 23.93 | 28.97 | 31.07 | 38.85 | e | 49.04 | d | 59.61 | 53.93 | b | 51.58 | f | 37.57 | c | 25.57 | 23.43 | a | 35.64 | a | ||||||
1976 | 21.58 | 29.10 | 26.50 | a | 32.75 | f | 46.52 | b | 49.26 | c | 60.60 | a | 57.03 | a | ----- | z | 36.94 | 25.87 | 18.87 | 37.23 | b | |||||
1977 | 21.10 | 22.68 | 24.00 | 36.11 | b | 41.82 | c | 54.87 | 60.74 | 58.94 | 51.38 | d | 40.17 | a | 27.90 | a | 26.55 | 38.85 | ||||||||
1978 | 26.77 | 27.54 | 35.03 | 35.86 | b | 40.43 | a | 49.93 | a | 56.45 | 53.90 | 47.43 | 40.65 | 31.37 | 18.65 | 38.67 | ||||||||||
1979 | 17.90 | a | 19.50 | 30.65 | 33.90 | 41.71 | c | 49.00 | b | 56.42 | 54.42 | 51.00 | 41.68 | 28.90 | 24.13 | 37.43 | ||||||||||
1980 | 29.35 | 28.90 | 28.94 | 37.07 | 42.03 | 49.27 | ----- | z | 57.19 | 50.33 | 38.29 | 29.30 | 28.16 | 38.08 | a | |||||||||||
1981 | 26.52 | 26.04 | 31.84 | 40.07 | a | 45.17 | b | 56.00 | 62.26 | 58.66 | b | 53.00 | e | 39.04 | e | 33.66 | a | 26.93 | b | 41.60 | ||||||
1982 | 20.84 | 25.68 | c | 30.32 | 33.60 | 43.26 | 48.45 | a | 55.94 | 56.81 | 50.87 | 35.36 | c | 28.50 | h | 22.74 | 38.53 | a | ||||||||
1983 | 23.58 | 28.68 | 32.52 | 32.93 | 38.00 | 49.77 | 58.23 | 58.35 | 52.40 | 39.97 | 28.67 | 26.34 | b | 39.12 | ||||||||||||
1984 | 20.67 | a | 19.10 | 24.61 | 32.13 | 46.19 | 50.80 | 60.55 | 58.97 | 50.87 | 33.45 | 29.77 | 25.81 | 37.74 | ||||||||||||
1985 | 23.10 | 21.82 | 29.71 | 37.37 | 44.58 | 51.87 | 59.90 | a | 56.16 | 47.57 | 40.42 | 26.43 | 23.26 | 38.52 | ||||||||||||
1986 | 27.67 | a | 30.25 | 34.58 | 35.87 | 43.48 | b | 52.57 | 57.23 | 59.29 | 46.17 | a | 38.94 | 29.62 | a | 23.17 | a | 39.90 | ||||||||
1987 | 17.87 | ----- | z | 25.38 | b | 36.52 | a | 44.20 | a | 50.86 | a | 52.87 | a | 56.13 | 48.46 | d | 42.07 | a | 31.57 | 19.77 | 38.70 | a | ||||
1988 | 21.41 | b | 25.62 | 26.20 | a | 36.93 | 41.23 | a | 54.59 | c | 61.46 | c | 55.79 | l | 46.47 | 41.43 | a | 28.21 | b | 18.68 | 36.57 | a | ||||
1989 | 15.76 | b | 23.89 | a | 32.07 | a | 39.86 | a | 44.30 | a | 51.07 | b | 59.54 | c | 54.21 | b | 48.65 | d | 37.87 | 26.79 | a | 17.90 | 37.66 | |||
1990 | 21.16 | 23.18 | 34.55 | 38.39 | b | 45.10 | b | 55.64 | b | 60.00 | c | 57.97 | b | 55.39 | b | 38.14 | b | 28.86 | b | 16.54 | c | 39.58 | ||||
1991 | 20.64 | c | 28.89 | a | 28.46 | c | 33.39 | b | 40.86 | c | 49.20 | 59.13 | 59.60 | a | 51.50 | 39.97 | 29.10 | a | 24.55 | 38.77 | ||||||
1992 | 20.55 | 31.14 | 34.74 | 40.33 | 47.83 | a | 50.80 | 57.39 | 58.35 | 50.86 | a | 42.23 | 24.36 | b | 20.52 | b | 39.92 | |||||||||
1993 | 27.28 | b | 30.25 | 31.87 | 36.00 | 44.97 | 49.67 | 56.13 | 57.13 | 45.60 | 38.58 | 24.59 | c | 20.69 | b | 38.56 | ||||||||||
1994 | 20.93 | b | 24.68 | 31.68 | 36.57 | 44.30 | a | 54.07 | a | 59.74 | 60.31 | b | 51.64 | b | 36.10 | 23.04 | b | 25.17 | b | 39.02 | ||||||
1995 | 27.38 | b | 29.70 | a | 31.79 | c | 33.81 | c | 41.38 | b | 47.21 | a | 54.58 | e | 58.00 | a | 50.86 | a | 35.77 | a | 31.52 | a | 25.72 | f | 40.18 | a |
1996 | 22.69 | e | 29.93 | 29.33 | a | 35.07 | 45.19 | 53.70 | 63.67 | a | 60.16 | 48.83 | 36.48 | 29.89 | b | 25.03 | b | 40.00 | ||||||||
1997 | 24.24 | b | 24.93 | 29.48 | 33.76 | a | 45.52 | 51.97 | a | 54.31 | b | 59.97 | 53.76 | a | 37.87 | a | 30.40 | 21.57 | a | 38.98 | ||||||
1998 | 23.00 | a | 27.48 | a | 28.52 | b | 30.28 | a | 39.46 | e | 49.52 | a | 59.94 | 59.48 | 52.60 | 36.71 | 26.71 | b | 21.20 | a | 37.91 | |||||
1999 | 19.61 | 25.18 | 29.13 | 32.00 | a | 42.27 | a | 50.17 | a | 59.94 | 58.77 | 48.76 | a | 38.47 | a | 30.59 | a | 18.45 | 37.78 | |||||||
2000 | 25.30 | a | 29.24 | 30.77 | 37.67 | 47.84 | 53.46 | b | 58.84 | 60.43 | a | 50.54 | b | 41.43 | c | 23.19 | d | 23.21 | b | 40.16 | ||||||
2001 | 23.41 | b | 27.15 | a | 31.57 | a | 36.60 | e | 44.00 | a | 50.90 | a | 57.55 | b | 58.45 | 49.69 | a | 40.52 | 29.04 | b | 20.52 | f | 40.81 | a | ||
2002 | 18.90 | 20.40 | c | 23.07 | b | 36.56 | c | 41.00 | a | 52.03 | a | 62.59 | b | 57.26 | 51.23 | d | 38.08 | f | 29.04 | f | 21.79 | g | 40.34 | c | ||
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.24 | e | 61.93 | d | 62.85 | d | 53.68 | b | 45.26 | d | 29.12 | e | 23.53 | a | 47.23 | e |
2004 | 22.29 | c | 23.96 | c | 35.60 | a | 38.00 | a | 44.86 | b | 54.24 | e | 60.09 | t | 60.72 | m | 46.20 | o | 43.03 | a | 32.11 | b | 24.48 | b | 35.40 | c |
2005 | 29.43 | a | 29.79 | 30.89 | c | 34.00 | a | 44.68 | c | 51.40 | 60.52 | b | 58.19 | 49.29 | b | 41.35 | 30.55 | a | 20.18 | c | 40.02 | |||||
2006 | 22.35 | 23.00 | c | 30.13 | a | 37.50 | 42.73 | a | 47.63 | 63.55 | 58.67 | a | 46.87 | 37.29 | 28.40 | 20.27 | a | 38.20 | ||||||||
2007 | 17.24 | b | 26.07 | 31.42 | 37.20 | 45.10 | b | 51.31 | a | 63.63 | a | 60.65 | 53.07 | a | 39.33 | a | 31.00 | a | 22.33 | a | 39.86 | |||||
2008 | 20.47 | a | 23.96 | a | 26.00 | 32.67 | 41.52 | 49.68 | b | 62.58 | 60.97 | 50.59 | a | 39.29 | 32.93 | b | 21.10 | a | 38.48 | |||||||
2009 | 24.33 | a | 27.43 | 29.13 | 35.40 | 48.97 | 53.63 | 62.42 | 56.45 | 52.50 | 37.32 | 31.48 | a | 17.90 | a | 39.75 | ||||||||||
2010 | 24.14 | b | 24.21 | 29.65 | 34.53 | 40.16 | 54.10 | 62.39 | 60.39 | 49.69 | a | 43.19 | 27.69 | a | 28.03 | a | 39.85 | |||||||||
2011 | 20.53 | a | 21.25 | 31.71 | 36.40 | 40.71 | 50.90 | 60.39 | 60.81 | 52.83 | 38.87 | 28.72 | a | 20.26 | 38.62 | |||||||||||
2012 | 21.48 | 25.28 | 30.38 | b | 39.20 | 46.52 | 54.37 | 62.23 | 61.03 | 52.33 | 41.03 | 30.69 | a | 23.86 | b | 40.70 | ||||||||||
2013 | 17.17 | a | 21.75 | 32.45 | 36.00 | 45.06 | 56.63 | 64.10 | 59.97 | a | 52.97 | 35.79 | q | 31.48 | a | 17.83 | a | 39.58 | a | |||||||
2014 | 21.63 | a | 26.11 | 31.52 | 37.37 | 46.32 | 55.03 | 63.61 | 58.39 | 54.66 | a | 42.61 | 30.24 | a | 28.17 | a | 41.30 | |||||||||
2015 | 25.40 | a | 28.46 | 34.00 | 35.90 | 44.29 | 56.80 | 58.93 | b | 60.90 | 53.83 | 45.10 | 28.69 | a | 19.73 | a | 41.00 | |||||||||
2016 | 22.53 | a | 25.85 | b | 32.35 | 36.80 | 45.39 | 56.23 | 61.16 | 58.77 | 49.63 | 45.97 | a | 33.86 | a | 24.33 | a | 41.07 | ||||||||
2017 | 23.93 | a | 32.11 | a | 34.74 | 35.83 | 43.90 | 55.40 | 62.19 | 58.39 | 51.90 | 37.71 | 35.17 | 20.68 | 41.00 | |||||||||||
2018 | 26.07 | d | 23.07 | 31.68 | 41.17 | 45.55 | 56.06 | l | ----- | z | ----- | z | ----- | z | 39.56 | m | 27.22 | l | 25.47 | l | 33.51 | g | ||||
2019 | ----- | z | 20.65 | b | 32.57 | a | 39.21 | b | 40.62 | b | 52.07 | 59.36 | c | 60.19 | 54.07 | a | ----- | z | ----- | z | ----- | z | 44.84 | d | ||
2020 | 24.22 | v | 23.41 | 33.13 | a | 38.25 | b | 46.73 | a | ----- | z | ----- | z | ----- | z | 48.71 | w | 37.25 | c | 30.64 | b | 17.10 | a | 32.36 | e | |
2021 | 20.97 | a | 22.82 | 26.62 | b | 39.20 | 42.80 | a | 58.37 | 65.12 | e | 60.90 | a | 53.63 | 38.06 | 31.46 | d | 24.07 | a | 40.33 | ||||||
2022 | 19.78 | d | 19.84 | c | 28.61 | 36.13 | 43.32 | 52.59 | a | 63.04 | f | 62.41 | b | 56.58 | d | 40.31 | e | 24.78 | l | 23.00 | u | 39.95 | c | |||
2023 | 28.00 | 28.93 | a | 30.67 | s | 33.72 | e | 44.23 | 47.50 | 61.13 | 61.04 | g | 49.60 | 39.56 | m | 31.73 | 27.45 | b | 39.14 | c | ||||||
2024 | 23.14 | b | 26.03 | 29.22 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.59 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.98 | 25.16 | 30.16 | 35.47 | 43.35 | 51.73 | 59.63 | 58.30 | 50.30 | 39.27 | 29.36 | 22.11 | 39.00 | |||||||||||||
S.D. | 3.51 | 3.68 | 3.03 | 2.80 | 2.58 | 2.73 | 2.67 | 2.20 | 2.92 | 2.78 | 2.75 | 3.21 | 1.38 | |||||||||||||
SKEW | -0.00 | -0.13 | -0.39 | -0.47 | -0.11 | 0.36 | -0.21 | -0.35 | -0.34 | 0.36 | -0.28 | 0.08 | -0.10 | |||||||||||||
MAX | 29.43 | 32.11 | 35.60 | 41.17 | 48.97 | 58.37 | 65.12 | 62.85 | 56.58 | 45.97 | 35.17 | 28.17 | 41.60 | |||||||||||||
MIN | 11.90 | 15.34 | 23.07 | 26.52 | 38.00 | 46.93 | 52.87 | 53.90 | 43.60 | 33.45 | 23.04 | 15.42 | 36.06 | |||||||||||||
YRS | 56 | 57 | 57 | 57 | 58 | 58 | 56 | 55 | 55 | 54 | 56 | 54 | 40 |