YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.63 | 63.06 | 61.48 | 55.73 | 45.94 | 31.20 | 19.26 | 47.19 | e | |||||||
1964 | 12.35 | 14.45 | 23.65 | 33.67 | 45.83 | a | 53.30 | 62.48 | 58.65 | 52.60 | 40.52 | 28.40 | 19.13 | a | 37.09 | |||||||||||
1965 | 22.94 | 21.00 | 26.57 | a | 35.90 | 43.39 | 49.90 | 61.45 | 58.48 | 49.43 | 39.97 | b | 33.30 | 24.65 | 38.91 | |||||||||||
1966 | 13.48 | 14.96 | 27.74 | 36.60 | 47.52 | 54.50 | 63.55 | 59.55 | 51.50 | 39.06 | 30.77 | 19.42 | 38.22 | |||||||||||||
1967 | 11.43 | a | 23.29 | 30.42 | 34.00 | 42.00 | 51.90 | 61.84 | 56.87 | 50.67 | 38.06 | 28.13 | 14.77 | 36.95 | ||||||||||||
1968 | 12.83 | a | 26.07 | 28.65 | 32.27 | 42.35 | 53.27 | 59.16 | 55.48 | 47.90 | 38.00 | 27.40 | 14.07 | a | 36.45 | |||||||||||
1969 | 22.55 | 22.29 | 23.74 | 36.38 | a | 46.10 | 51.20 | 61.45 | 61.29 | 51.63 | 36.87 | 26.57 | 23.19 | 38.60 | ||||||||||||
1970 | 17.45 | 24.43 | 25.77 | 29.33 | 42.84 | 52.37 | 60.16 | 60.55 | 46.93 | 34.19 | 27.93 | 19.87 | 36.82 | |||||||||||||
1971 | 12.81 | 20.43 | 23.71 | 32.87 | 40.48 | 52.77 | 58.93 | b | 57.39 | 47.29 | i | 36.79 | l | 26.91 | h | 18.52 | j | 37.42 | d | |||||||
1972 | 16.19 | j | 20.30 | i | 29.17 | h | 35.20 | j | 43.48 | f | 52.73 | 61.58 | 58.48 | 50.87 | 44.00 | 27.03 | 16.19 | 44.41 | e | |||||||
1973 | 13.35 | 22.44 | a | 29.29 | 32.97 | 43.23 | 51.43 | 59.00 | a | 57.74 | 48.07 | 38.11 | c | 29.27 | 20.50 | a | 37.12 | |||||||||
1974 | 15.35 | 13.93 | 30.74 | 32.86 | b | 44.58 | 54.17 | 59.63 | d | 57.61 | 50.17 | 42.71 | 28.67 | 17.07 | a | 37.29 | ||||||||||
1975 | 12.16 | 17.18 | 26.26 | 30.63 | 39.65 | 48.00 | 59.29 | 55.84 | 49.07 | 37.65 | 24.57 | 19.61 | 34.99 | |||||||||||||
1976 | 15.52 | 27.24 | 26.10 | 35.40 | 46.74 | h | 52.42 | f | 59.21 | c | 56.67 | d | 51.15 | d | 33.54 | g | 25.43 | i | 14.45 | i | 38.76 | e | ||||
1977 | 12.38 | j | 22.37 | i | 24.09 | h | 37.80 | j | 42.10 | j | 57.14 | i | 59.70 | a | 59.23 | a | 52.77 | 39.32 | 29.83 | 21.55 | 43.73 | f | ||||
1978 | 23.81 | 23.33 | a | 32.80 | a | 37.90 | 42.29 | 54.10 | 60.84 | 53.97 | a | 50.03 | a | 41.24 | j | 32.57 | 12.19 | 38.53 | a | |||||||
1979 | 11.77 | 14.79 | 27.65 | 35.60 | 43.09 | h | 51.67 | 57.87 | 56.58 | ----- | z | 39.74 | h | 22.96 | b | 21.16 | 33.34 | c | ||||||||
1980 | 26.16 | 26.14 | 27.42 | 33.73 | 40.71 | 52.90 | 58.57 | a | 59.10 | 50.17 | a | 37.03 | a | 29.39 | b | 27.00 | 39.03 | |||||||||
1981 | 22.69 | b | 23.07 | 28.87 | 38.80 | 44.10 | a | 54.93 | b | 60.47 | a | 58.87 | 52.97 | a | 40.10 | a | 30.40 | 21.97 | 39.77 | |||||||
1982 | 15.38 | b | 20.79 | 29.93 | b | 34.32 | b | 42.55 | 51.07 | 59.57 | a | 59.16 | 51.71 | b | 35.45 | 28.33 | f | 23.57 | c | 38.50 | a | |||||
1983 | 22.87 | 25.43 | 30.97 | a | 31.57 | 39.10 | b | 49.70 | 58.71 | 61.43 | a | 47.86 | b | 40.32 | c | 28.39 | b | 23.29 | c | 38.30 | ||||||
1984 | 16.80 | a | 21.93 | b | 28.13 | a | 31.30 | 46.74 | 52.45 | a | 62.26 | 59.57 | c | 52.21 | b | 37.53 | a | 27.50 | 25.79 | b | 38.52 | |||||
1985 | 23.53 | a | 18.23 | b | 30.86 | b | 36.07 | 44.83 | a | 54.60 | 59.35 | 57.74 | 47.73 | 40.90 | 27.27 | 21.93 | b | 38.59 | ||||||||
1986 | 23.77 | 26.50 | 32.19 | 35.60 | 42.63 | a | 54.60 | 57.74 | 60.16 | ----- | z | 37.68 | 30.34 | a | 24.26 | 38.68 | a | |||||||||
1987 | 19.16 | 26.43 | 26.19 | 35.83 | 45.06 | 52.77 | 56.48 | 55.68 | 49.07 | 40.81 | 29.53 | 19.47 | a | 38.04 | ||||||||||||
1988 | 11.26 | 21.17 | 25.81 | 35.17 | 42.58 | 55.57 | 60.61 | 59.26 | 47.27 | 42.55 | 27.90 | 18.57 | c | 37.31 | ||||||||||||
1989 | 12.74 | 21.32 | 32.10 | 40.03 | 45.16 | 51.57 | 61.10 | 58.45 | 50.77 | 38.19 | 24.23 | 16.97 | 37.72 | |||||||||||||
1990 | 15.94 | 22.14 | 31.45 | 37.17 | 42.13 | 53.70 | 59.50 | a | 56.90 | 56.00 | 38.16 | 30.47 | 13.13 | a | 38.06 | |||||||||||
1991 | 16.26 | 23.61 | 28.81 | 32.23 | 45.29 | 51.53 | 60.87 | 60.06 | 51.87 | 41.13 | 27.83 | 23.10 | 38.55 | |||||||||||||
1992 | 16.90 | 27.10 | 32.16 | 40.30 | 48.13 | 53.77 | 58.06 | 58.55 | 50.80 | 42.52 | 24.67 | 17.13 | 39.17 | |||||||||||||
1993 | 23.48 | 27.14 | 31.16 | 34.50 | 45.67 | j | 51.82 | h | 59.35 | 58.65 | 49.62 | i | 40.19 | 26.17 | 21.68 | 35.81 | c | |||||||||
1994 | 20.65 | 20.86 | 32.77 | 37.53 | 47.55 | 55.93 | 61.71 | 62.16 | 52.70 | 39.55 | 29.03 | 26.55 | 40.58 | |||||||||||||
1995 | 24.81 | 30.07 | 32.48 | 35.17 | 42.81 | 52.57 | 60.52 | 61.84 | 53.00 | 35.68 | 30.23 | 25.39 | 40.38 | |||||||||||||
1996 | 18.13 | 27.52 | 28.52 | 35.17 | 46.16 | 56.50 | 62.87 | 60.13 | 48.37 | 40.43 | a | 30.23 | 21.90 | 39.66 | ||||||||||||
1997 | 20.65 | 25.43 | 30.16 | 34.00 | 46.62 | j | 54.67 | 56.33 | g | 59.24 | j | 54.29 | i | 37.68 | i | 29.83 | g | 20.96 | h | 32.98 | g | |||||
1998 | 23.37 | a | 25.36 | f | 27.80 | a | 33.80 | e | 43.57 | j | 49.77 | h | 62.04 | g | 60.24 | f | 54.43 | i | 39.96 | f | 30.13 | 21.45 | i | 28.77 | h | |
1999 | 22.32 | l | 24.63 | a | 31.43 | h | 34.63 | k | 42.19 | o | 52.95 | i | 62.60 | k | 59.23 | i | 50.48 | i | 39.89 | m | 30.11 | k | 19.47 | l | 24.63 | k |
2000 | 24.53 | n | 30.80 | n | 31.63 | d | 38.70 | g | 47.29 | g | 56.72 | l | 62.12 | n | 63.10 | k | 54.00 | j | 42.17 | b | 22.79 | k | 23.44 | m | 36.90 | j |
2001 | 18.95 | k | 24.00 | i | 30.96 | e | 37.13 | g | 46.85 | k | 55.37 | k | 61.65 | k | 60.23 | a | 52.50 | l | 41.48 | 33.35 | g | 19.66 | b | 38.08 | h | |
2002 | 20.57 | c | 18.53 | k | 28.40 | p | 39.75 | f | 44.41 | n | 54.47 | k | 62.32 | 58.90 | j | 52.00 | k | 39.41 | i | 28.03 | 21.77 | 33.18 | h | |||
2003 | 25.52 | b | 24.79 | i | 29.84 | 35.89 | l | 47.17 | g | 54.29 | m | 64.45 | k | 61.93 | b | 50.79 | b | 43.25 | k | 28.16 | k | 21.52 | j | 42.02 | h | |
2004 | 21.53 | a | 19.36 | a | 34.10 | 36.96 | f | 44.45 | i | 52.83 | a | 60.05 | j | 57.07 | b | 49.80 | 40.14 | c | 29.33 | 22.17 | a | 36.26 | c | |||
2005 | 28.63 | a | 29.22 | a | 30.34 | b | 35.05 | i | 45.05 | j | 52.00 | 61.85 | k | 59.35 | h | 53.61 | g | 43.19 | 29.48 | i | 18.19 | j | 36.68 | g | ||
2006 | 20.77 | 21.32 | i | 29.17 | h | 36.95 | j | 45.27 | i | 56.10 | i | 63.00 | k | 60.00 | h | 46.65 | j | 37.86 | j | 30.29 | i | 21.00 | k | 20.77 | k | |
2007 | 17.25 | k | 24.53 | i | 30.64 | i | 36.05 | i | 46.36 | i | 54.14 | i | 63.00 | j | 61.35 | h | 52.10 | j | 38.68 | i | 31.40 | j | 22.16 | l | ----- | z |
2008 | 13.95 | j | 20.96 | f | 26.71 | j | 32.24 | i | 41.50 | i | 51.95 | i | 60.36 | i | 60.38 | j | 51.05 | i | 38.76 | j | 29.39 | l | 22.90 | j | ----- | z |
2009 | 17.68 | l | 26.00 | i | 30.24 | j | 33.18 | h | 48.33 | j | 53.36 | h | 61.00 | i | 57.85 | k | 52.15 | j | 36.47 | n | 29.37 | k | 16.09 | i | ----- | z |
2010 | 17.89 | l | 21.63 | i | 27.74 | h | 35.23 | h | 38.50 | o | 55.20 | j | 63.43 | j | 59.45 | i | 52.30 | j | 43.45 | k | 26.55 | j | 28.10 | j | ----- | z |
2011 | 14.45 | k | 17.80 | h | 30.86 | i | 34.94 | m | 40.52 | j | 52.65 | j | 61.90 | k | 62.10 | k | 53.24 | i | 41.35 | k | 27.89 | l | 20.90 | j | ----- | z |
2012 | 21.25 | k | 24.90 | i | 29.73 | i | 37.60 | j | 46.68 | i | 58.33 | i | 62.71 | g | 62.64 | i | 53.06 | l | 40.14 | j | 30.00 | j | 19.56 | o | ----- | z |
2013 | 12.40 | k | 18.61 | j | 27.25 | k | 34.85 | j | 45.52 | h | 56.63 | k | 63.83 | a | 59.82 | i | 54.88 | m | 38.00 | i | 28.95 | k | 17.35 | k | 63.83 | k |
2014 | 18.35 | k | 25.06 | j | 29.33 | j | 33.27 | h | 40.90 | k | 54.30 | j | 62.95 | j | 58.90 | k | 55.18 | h | 41.25 | g | 27.05 | k | 26.25 | k | ----- | z |
2015 | 25.63 | l | 27.15 | h | 33.05 | i | 36.18 | h | 44.11 | l | 57.33 | i | 59.91 | i | 60.11 | l | 56.63 | k | 46.33 | j | 29.53 | k | 18.57 | j | ----- | z |
2016 | 16.56 | o | 23.29 | h | 29.65 | h | 35.05 | i | 43.58 | e | 58.88 | d | 61.50 | g | 59.30 | k | 52.05 | i | 40.55 | k | 35.32 | h | 23.00 | h | 51.23 | j |
2017 | 23.90 | j | 30.59 | f | 33.08 | f | 35.70 | g | 42.86 | i | 56.91 | h | 64.89 | l | 60.00 | h | 52.65 | j | 38.95 | l | 32.60 | j | 21.30 | k | ----- | z |
2018 | 20.81 | j | 24.74 | i | 27.77 | i | 36.15 | j | 46.68 | i | 56.62 | i | 63.05 | j | 59.18 | t | 52.58 | k | 41.42 | l | 23.85 | j | 22.69 | r | ----- | z |
2019 | 17.35 | k | 19.07 | m | 32.27 | i | 38.00 | g | 40.90 | j | 53.26 | k | 61.86 | j | 60.32 | i | 52.00 | l | 35.37 | l | 28.67 | l | 21.47 | l | ----- | z |
2020 | 21.19 | j | 19.58 | j | 31.81 | j | 34.75 | r | 46.39 | m | 54.73 | h | 60.62 | j | 61.71 | j | 50.29 | i | 38.57 | j | 30.20 | j | 17.43 | j | ----- | z |
2021 | 17.42 | l | 22.47 | i | 27.61 | h | 36.05 | h | 43.37 | l | 56.62 | i | 62.86 | j | 58.76 | j | 52.40 | j | 38.90 | k | 30.45 | j | 24.29 | j | ----- | z |
2022 | 20.95 | l | 20.00 | j | 25.96 | h | 34.05 | i | 43.35 | k | 55.24 | i | 63.20 | k | 61.48 | h | 56.33 | i | 39.04 | g | 25.85 | c | 21.45 | i | 25.85 | k |
2023 | 21.13 | a | 18.63 | a | 28.13 | 33.00 | a | 46.19 | 51.07 | 63.81 | 61.30 | a | 53.69 | a | 42.26 | 30.63 | 25.27 | a | 39.59 | |||||||
2024 | 20.68 | 26.52 | 32.00 | 35.70 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.40 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.78 | 22.68 | 29.20 | 34.75 | 43.85 | 53.01 | 60.46 | 58.79 | 50.77 | 39.77 | 28.51 | 20.64 | 38.23 | |||||||||||||
S.D. | 4.83 | 4.20 | 2.71 | 2.52 | 2.35 | 2.06 | 1.82 | 2.00 | 2.26 | 2.56 | 2.29 | 3.75 | 1.30 | |||||||||||||
SKEW | -0.02 | -0.46 | -0.38 | 0.20 | -0.06 | 0.28 | 0.11 | -0.23 | 0.33 | 0.07 | -0.37 | -0.42 | -0.29 | |||||||||||||
MAX | 28.63 | 30.07 | 34.10 | 40.30 | 48.13 | 58.88 | 63.83 | 62.16 | 56.00 | 45.94 | 33.30 | 27.00 | 40.58 | |||||||||||||
MIN | 11.26 | 13.93 | 23.65 | 29.33 | 39.10 | 48.00 | 56.48 | 53.97 | 46.93 | 34.19 | 22.96 | 12.19 | 34.99 | |||||||||||||
YRS | 40 | 37 | 40 | 34 | 30 | 36 | 37 | 38 | 33 | 35 | 36 | 36 | 25 |