YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.16 | h | 65.63 | 60.31 | 52.33 | 43.55 | 32.77 | 25.52 | 46.68 | f | ||||||
1960 | 16.56 | 20.45 | 32.50 | 40.68 | 47.61 | 58.78 | 63.16 | 61.31 | 55.37 | 40.03 | 31.05 | 22.74 | 40.85 | |||||||||||||
1961 | 22.27 | 26.88 | 28.67 | a | 37.97 | 45.69 | 58.02 | a | 61.74 | 58.85 | a | 48.98 | 41.05 | b | 29.02 | 19.98 | a | 39.93 | ||||||||
1962 | 22.06 | 26.20 | a | 23.00 | a | 42.59 | a | 45.19 | 54.57 | 60.18 | a | 60.79 | 54.09 | b | 44.31 | 35.86 | b | 26.84 | 41.31 | |||||||
1963 | 19.48 | a | 32.12 | 28.20 | a | 36.00 | b | 49.95 | 54.19 | a | 64.95 | 60.07 | b | 54.78 | 47.47 | 32.20 | 24.29 | 41.98 | ||||||||
1964 | 19.23 | 19.55 | 23.82 | 36.15 | 44.90 | 53.35 | 64.24 | 60.60 | 51.85 | 46.27 | 27.57 | a | 23.89 | 39.29 | ||||||||||||
1965 | 24.53 | 24.45 | 27.11 | 35.60 | 44.00 | a | 51.50 | 60.85 | 59.56 | 49.37 | 46.65 | 34.43 | 24.27 | 40.19 | ||||||||||||
1966 | 18.71 | 18.80 | 33.07 | a | 40.83 | 50.08 | a | 56.22 | 62.97 | 63.19 | 54.47 | a | 43.31 | 34.72 | 23.87 | 41.69 | ||||||||||
1967 | 24.02 | 27.21 | 35.62 | a | 34.60 | 45.42 | 52.68 | 63.85 | a | 62.05 | 54.13 | 46.60 | 35.90 | 18.76 | 41.74 | |||||||||||
1968 | 22.24 | 29.02 | 31.78 | a | 34.73 | 45.25 | a | 56.60 | 60.79 | 56.00 | 51.72 | 43.29 | 31.02 | 20.24 | 40.22 | |||||||||||
1969 | 27.18 | 20.96 | 24.87 | 39.40 | 50.60 | 52.87 | 62.77 | 63.10 | 54.75 | 37.84 | 31.02 | 26.35 | 40.98 | |||||||||||||
1970 | 24.50 | 30.41 | 29.48 | 33.77 | 48.42 | 56.68 | 62.24 | 62.02 | a | 50.52 | 40.31 | 33.78 | 21.26 | 41.12 | ||||||||||||
1971 | 23.36 | b | 23.96 | 31.08 | 38.92 | 44.47 | 56.70 | 64.12 | a | 62.56 | 50.50 | 39.08 | 27.43 | 18.87 | 40.09 | |||||||||||
1972 | 23.45 | 28.24 | b | 38.69 | 41.03 | 48.08 | 57.75 | 64.73 | 60.48 | 52.02 | 42.18 | 25.97 | ----- | z | 43.87 | a | ||||||||||
1973 | 17.00 | 23.67 | a | ----- | z | 34.68 | 48.77 | 56.28 | 61.97 | 61.35 | 51.63 | 43.76 | 30.73 | 26.08 | 41.45 | a | ||||||||||
1974 | 19.71 | b | 22.04 | a | 36.56 | 37.40 | d | 51.43 | a | 60.15 | 62.58 | 59.92 | 54.60 | 43.85 | 31.33 | f | 20.14 | c | 42.58 | a | ||||||
1975 | 23.77 | c | 21.93 | 27.74 | b | 30.57 | 43.16 | 53.80 | b | 62.37 | 58.84 | 53.15 | 42.19 | 31.57 | a | 27.98 | e | 39.76 | ||||||||
1976 | 24.40 | a | 28.86 | 27.15 | 37.30 | 48.56 | 55.72 | 63.93 | a | 58.55 | 52.58 | 41.15 | 34.09 | a | 26.00 | 41.52 | ||||||||||
1977 | 21.37 | a | 28.36 | 28.56 | 41.15 | 44.24 | b | 58.69 | a | 63.37 | 62.85 | 55.68 | 45.65 | a | 34.52 | a | 30.95 | a | 42.95 | |||||||
1978 | 24.52 | 24.84 | 35.00 | 39.42 | 45.47 | 57.17 | 63.27 | 60.55 | 52.38 | 47.82 | 31.68 | b | 18.63 | 41.73 | ||||||||||||
1979 | 16.71 | 21.82 | 29.23 | 36.65 | 46.89 | 55.95 | 63.19 | 59.39 | 56.37 | 47.06 | 26.50 | 27.19 | 40.58 | |||||||||||||
1980 | 27.18 | 28.26 | 27.06 | 38.34 | b | 44.26 | b | 56.22 | 63.38 | a | 60.50 | 53.82 | 42.29 | 33.90 | 33.95 | a | 42.43 | |||||||||
1981 | 30.08 | 28.85 | b | 31.16 | 43.75 | 46.94 | 62.57 | a | 64.82 | 61.15 | 54.88 | 40.60 | 34.27 | b | 29.50 | 44.05 | ||||||||||
1982 | 24.02 | a | 24.39 | 31.02 | a | 37.05 | a | 45.67 | b | 54.03 | 61.06 | 60.85 | 53.70 | 38.29 | 29.32 | e | 22.96 | c | 40.20 | |||||||
1983 | 24.97 | b | 26.66 | 30.28 | a | 31.20 | 45.60 | 54.98 | a | 62.64 | b | 60.88 | a | 56.25 | 44.33 | a | 30.31 | a | 25.10 | f | 42.55 | a | ||||
1984 | 23.15 | e | 25.04 | d | 30.04 | e | 35.98 | d | 52.27 | a | 54.53 | a | 62.47 | 60.86 | b | 55.07 | 38.16 | 32.28 | c | 23.73 | e | 41.13 | ||||
1985 | 21.45 | b | 22.33 | a | 30.78 | b | 43.44 | c | 49.38 | b | 59.54 | c | 62.67 | a | 61.10 | a | 50.13 | 43.41 | b | 28.08 | e | 25.09 | b | 41.45 | ||
1986 | 30.04 | c | 29.27 | 36.47 | a | 39.00 | 48.64 | b | 58.75 | 61.13 | a | 62.52 | a | 48.17 | f | 39.50 | d | 33.21 | d | 23.10 | b | 41.97 | a | |||
1987 | 20.17 | a | 24.52 | a | 27.33 | a | 41.60 | d | 46.48 | b | 58.22 | 60.73 | a | 59.29 | 52.55 | a | 45.50 | 29.21 | b | 20.92 | a | 40.54 | ||||
1988 | 21.16 | 27.38 | h | 29.58 | a | 39.43 | b | 44.48 | e | 58.63 | 64.38 | e | 60.87 | 51.64 | a | 47.55 | c | 31.50 | 21.22 | b | 42.77 | a | ||||
1989 | 16.68 | a | 21.38 | 37.25 | a | 45.78 | c | 46.26 | n | 55.26 | c | 64.33 | j | 60.24 | b | 53.62 | b | 41.98 | b | 34.11 | b | 25.96 | c | 39.23 | b | |
1990 | 22.07 | a | 22.38 | d | 34.10 | 41.75 | 46.48 | a | 59.62 | 63.63 | 59.83 | a | 55.98 | a | 43.28 | b | 32.17 | c | 14.88 | a | 41.35 | |||||
1991 | 20.28 | b | 28.91 | 26.44 | 35.79 | a | 45.34 | c | 53.72 | 62.40 | 61.35 | 54.14 | a | 44.80 | a | 29.14 | a | 21.85 | 40.35 | |||||||
1992 | 20.35 | a | 26.21 | a | 32.53 | a | 44.83 | a | 49.73 | 55.23 | 59.12 | a | 60.58 | a | 53.52 | 45.97 | 27.10 | 17.63 | a | 41.07 | ||||||
1993 | 22.62 | c | 23.22 | c | 32.41 | c | 37.79 | d | 48.60 | a | 53.92 | 62.45 | b | 59.62 | a | 52.74 | e | 41.67 | e | 27.60 | f | 22.94 | f | 43.50 | b | |
1994 | 24.91 | d | 19.81 | g | 34.87 | a | 40.59 | b | 48.39 | c | 61.43 | a | 65.34 | 64.10 | 54.42 | f | 40.24 | b | 25.43 | i | 23.36 | f | 47.48 | d | ||
1995 | 20.90 | e | 31.96 | e | 31.55 | c | 36.29 | b | 43.48 | a | 51.98 | a | 60.78 | b | 62.70 | a | 55.12 | a | 42.59 | b | 36.65 | 25.09 | b | 41.59 | ||
1996 | ----- | z | 30.04 | a | 32.97 | 38.35 | d | 49.82 | f | 59.92 | 65.89 | 62.75 | a | 51.32 | 41.03 | a | 31.83 | a | 24.80 | a | 43.89 | b | ||||
1997 | 23.20 | a | 23.54 | a | 34.71 | 35.30 | c | 49.32 | a | 55.93 | a | 60.98 | c | 60.54 | c | 54.54 | c | 40.82 | c | 32.19 | c | 21.00 | 41.00 | |||
1998 | 24.63 | a | 21.72 | a | 28.29 | e | 34.55 | a | 45.14 | b | 51.38 | a | 63.82 | 61.48 | b | 52.62 | 39.62 | b | 31.25 | d | 24.39 | c | 39.91 | |||
1999 | 28.56 | 28.09 | a | 36.39 | 33.96 | b | 43.57 | c | 55.71 | a | 62.36 | b | 58.59 | b | 51.55 | b | 45.29 | b | 35.62 | b | 23.98 | b | 41.97 | |||
2000 | 26.92 | 27.95 | 30.70 | a | 43.43 | 52.54 | e | 59.10 | a | 64.18 | c | 63.31 | 54.10 | a | 42.55 | a | 23.00 | a | 28.04 | f | 44.34 | a | ||||
2001 | 22.29 | 25.07 | f | 32.33 | e | 38.08 | k | 50.40 | j | 59.54 | g | 63.10 | e | 61.11 | h | 54.60 | f | 48.05 | k | 32.23 | f | 20.74 | d | 34.61 | h | |
2002 | 21.86 | f | 24.54 | d | 27.77 | i | 42.94 | e | 48.21 | 61.31 | c | 67.43 | a | 62.68 | a | 52.88 | a | 40.13 | 31.17 | c | 22.40 | f | 47.92 | c | ||
2003 | 30.60 | a | 24.85 | a | 31.40 | 36.70 | 47.84 | c | 57.43 | b | 68.09 | c | 62.45 | b | 55.57 | 48.33 | a | 27.35 | 23.09 | b | 42.81 | |||||
2004 | 20.76 | d | 18.94 | b | 35.86 | b | 39.87 | 48.69 | d | 57.15 | c | 62.93 | b | 60.93 | a | 51.69 | c | 39.91 | c | 27.91 | a | 22.90 | b | 40.63 | ||
2005 | 25.30 | c | 24.85 | e | 29.28 | a | 36.80 | c | 48.15 | a | 53.00 | d | 65.48 | c | 58.85 | 51.97 | 42.70 | c | 33.62 | b | 24.21 | b | 41.18 | |||
2006 | 21.93 | b | 24.78 | c | 26.70 | a | 38.94 | d | 50.74 | d | 60.41 | c | 64.93 | d | 61.26 | d | 48.29 | d | 39.45 | c | 32.88 | d | 23.84 | f | 42.76 | a |
2007 | 16.73 | e | 27.70 | 34.00 | i | 39.83 | d | 46.85 | h | 57.92 | e | 66.29 | b | 63.08 | l | 53.48 | b | 41.33 | b | 37.40 | o | ----- | z | 43.33 | e | |
2008 | ----- | z | ----- | z | 29.50 | e | 34.97 | 40.00 | v | ----- | z | 61.61 | l | 65.34 | 55.35 | 45.61 | 38.87 | 28.31 | 42.56 | e | ||||||
2009 | 30.37 | 29.71 | 35.47 | 39.52 | a | 54.11 | 54.42 | 66.58 | 62.37 | 57.08 | 42.16 | 36.58 | 23.89 | 44.36 | ||||||||||||
2010 | 27.10 | 28.16 | 32.44 | 39.10 | 45.19 | 59.15 | 65.29 | 61.00 | 56.77 | 45.65 | 33.29 | a | 32.65 | 43.81 | ||||||||||||
2011 | 28.30 | a | 26.73 | 34.26 | 40.40 | 46.03 | 57.38 | 63.19 | 64.23 | 55.33 | 45.42 | 33.42 | 27.10 | 43.48 | ||||||||||||
2012 | 31.37 | 28.83 | 36.60 | 43.82 | b | 52.23 | a | 62.07 | 64.19 | 63.84 | 55.87 | 46.92 | 38.33 | 28.24 | 46.03 | |||||||||||
2013 | 23.90 | 27.00 | 37.26 | 41.69 | a | 49.40 | a | 62.17 | 64.82 | 62.00 | 54.00 | 41.13 | 34.82 | 25.95 | 43.68 | |||||||||||
2014 | 31.19 | 33.04 | 36.81 | 42.70 | 49.05 | 59.63 | 65.24 | 59.97 | 56.47 | 47.05 | 37.48 | 29.81 | 45.70 | |||||||||||||
2015 | 32.52 | 35.38 | 38.48 | 40.85 | 47.16 | 61.23 | 62.32 | 61.98 | 58.22 | 47.63 | 32.48 | a | 27.00 | a | 45.44 | |||||||||||
2016 | 27.62 | a | 33.07 | a | 38.62 | a | 41.67 | 47.66 | 62.93 | 65.21 | 60.97 | 53.37 | 47.94 | 37.45 | 28.11 | 45.38 | ||||||||||
2017 | 27.05 | a | 33.71 | 38.40 | e | 42.45 | 49.10 | a | 64.38 | d | 65.95 | a | 62.77 | 53.71 | a | 45.43 | c | 41.22 | g | 33.63 | a | 46.96 | a | |||
2018 | 32.25 | a | 30.50 | a | 34.98 | 45.42 | e | 51.53 | a | 62.92 | 66.63 | 64.40 | 59.12 | 42.68 | 35.00 | 28.10 | 46.13 | |||||||||
2019 | 26.50 | b | 30.30 | w | 35.58 | s | 40.77 | 41.40 | 54.88 | 63.11 | 63.16 | 54.98 | 39.00 | e | 32.91 | a | 21.82 | a | 43.85 | b | ||||||
2020 | 21.66 | 24.87 | b | 31.13 | a | 38.57 | 50.89 | 57.82 | 63.62 | b | 66.35 | 55.07 | 46.98 | c | 32.18 | 21.45 | 42.55 | |||||||||
2021 | 21.23 | 23.98 | a | 28.69 | 40.78 | e | 48.89 | 62.77 | 65.89 | 62.05 | 55.95 | 38.40 | 36.67 | 24.81 | 42.51 | |||||||||||
2022 | 22.61 | 22.16 | 30.98 | a | 39.03 | 47.85 | 58.85 | 65.27 | 61.85 | 57.37 | 42.37 | a | 25.85 | 21.95 | 41.35 | |||||||||||
2023 | 18.61 | 19.12 | b | 22.08 | a | 34.60 | 47.45 | a | 53.14 | a | 66.86 | c | 61.33 | b | 53.19 | a | 42.29 | b | 32.78 | a | 26.36 | c | 39.82 | |||
2024 | 23.53 | a | 24.77 | a | 29.26 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.85 | i |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.74 | 26.02 | 31.62 | 38.87 | 47.56 | 57.25 | 63.64 | 61.35 | 53.78 | 43.15 | 32.17 | 24.46 | 41.91 | |||||||||||||
S.D. | 4.08 | 3.91 | 4.07 | 3.39 | 2.68 | 3.21 | 1.90 | 1.78 | 2.21 | 2.92 | 3.39 | 3.88 | 1.81 | |||||||||||||
SKEW | 0.31 | 0.19 | -0.13 | -0.14 | 0.13 | 0.20 | 0.04 | 0.10 | -0.16 | 0.05 | -0.35 | 0.24 | 0.91 | |||||||||||||
MAX | 32.52 | 35.38 | 38.69 | 45.78 | 54.11 | 64.38 | 68.09 | 66.35 | 59.12 | 48.33 | 38.87 | 33.95 | 46.13 | |||||||||||||
MIN | 16.56 | 18.80 | 22.08 | 30.57 | 41.40 | 51.38 | 59.12 | 56.00 | 48.29 | 37.84 | 23.00 | 14.88 | 39.29 | |||||||||||||
YRS | 62 | 60 | 61 | 63 | 59 | 62 | 63 | 63 | 62 | 64 | 59 | 57 | 46 |