YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.03 | 63.74 | 60.84 | 56.90 | 45.26 | 35.13 | 27.23 | 49.59 | e | |||||||
1963 | 14.29 | 26.86 | 33.16 | 44.00 | 52.90 | 59.07 | 63.87 | 61.10 | 56.40 | 48.06 | 33.97 | 21.32 | 42.92 | |||||||||||||
1964 | 21.10 | a | 20.66 | 28.45 | 39.53 | 52.06 | 57.13 | 63.19 | 60.26 | 54.93 | 41.00 | 31.77 | 24.00 | 41.17 | ||||||||||||
1965 | 24.58 | 20.50 | 22.19 | 40.83 | 50.39 | 59.03 | 62.60 | a | 59.71 | 51.30 | 40.13 | 34.03 | 26.03 | 40.94 | ||||||||||||
1966 | 15.06 | 19.21 | 30.61 | 37.93 | 48.71 | 59.37 | 65.45 | 60.42 | 54.00 | 37.74 | 32.63 | 19.55 | 40.06 | |||||||||||||
1967 | 20.87 | 21.00 | 33.94 | 43.30 | 44.87 | 58.77 | 61.47 | a | 58.84 | 52.40 | 40.27 | a | 29.50 | 19.94 | 40.43 | |||||||||||
1968 | 23.19 | 21.52 | 30.10 | 36.10 | a | 47.26 | 58.30 | 61.32 | 60.45 | 50.97 | 42.55 | 30.53 | 20.10 | 40.20 | ||||||||||||
1969 | 24.13 | 26.21 | 25.55 | 40.70 | 50.94 | 55.83 | 64.39 | 62.45 | 55.70 | 40.26 | 28.50 | 24.45 | 41.59 | |||||||||||||
1970 | 18.06 | 24.75 | 27.10 | 36.00 | 48.48 | 55.53 | 62.61 | 60.94 | 52.87 | 36.52 | 28.07 | 23.58 | 39.54 | |||||||||||||
1971 | ----- | z | 21.52 | a | 25.61 | 37.07 | 45.06 | 57.27 | 59.81 | 58.65 | 52.40 | 42.45 | 31.30 | 26.06 | 41.56 | a | ||||||||||
1972 | 17.94 | 21.34 | 31.81 | 41.43 | 49.06 | 58.43 | 60.42 | 57.94 | 53.67 | 41.03 | 24.43 | 18.48 | 39.67 | |||||||||||||
1973 | 19.16 | 23.11 | ----- | z | 33.30 | 46.03 | 55.40 | 61.06 | 59.06 | 52.63 | 42.84 | 30.87 | 20.90 | 40.40 | a | |||||||||||
1974 | 20.74 | 22.25 | 34.71 | 39.60 | 51.71 | 56.57 | 62.23 | 58.13 | 49.20 | 44.32 | 30.77 | 22.13 | 41.03 | |||||||||||||
1975 | ----- | z | 21.93 | 26.58 | 35.70 | 45.16 | 55.73 | 59.71 | 58.35 | 47.93 | 38.35 | 26.33 | 21.60 | a | 39.76 | a | ||||||||||
1976 | 16.68 | 27.69 | 29.52 | 42.57 | 44.55 | 55.47 | 59.23 | 57.06 | 52.50 | 34.52 | 24.47 | 18.03 | 38.52 | |||||||||||||
1977 | 15.32 | 25.00 | 28.48 | 41.70 | 52.39 | 59.07 | 62.45 | 62.74 | 53.47 | 42.74 | 28.33 | 22.32 | 41.17 | |||||||||||||
1978 | 15.71 | 20.00 | 29.35 | 40.43 | 48.13 | 59.70 | 61.65 | 58.90 | 54.37 | 41.71 | 34.70 | 19.27 | a | 40.33 | ||||||||||||
1979 | 14.97 | 21.89 | 30.39 | 39.93 | 47.33 | a | 55.67 | 61.00 | 57.77 | 52.43 | 40.35 | 25.52 | a | 23.30 | a | 39.21 | ||||||||||
1980 | 22.48 | 23.69 | 26.06 | 34.07 | 46.10 | 60.37 | 63.16 | 60.93 | c | 55.47 | 38.80 | a | 26.77 | 26.83 | a | 40.39 | ||||||||||
1981 | 23.29 | 23.62 | b | 33.48 | 42.83 | 47.30 | a | 59.07 | b | 63.68 | 60.61 | 53.80 | 44.76 | b | 34.27 | 24.45 | 42.60 | |||||||||
1982 | 19.26 | h | 21.33 | g | 30.67 | m | 38.89 | k | 48.85 | k | 56.04 | f | 62.37 | d | 62.22 | d | 55.30 | g | 39.91 | i | 28.14 | h | 22.55 | b | 49.05 | i |
1983 | 18.77 | 24.85 | b | 30.78 | d | 32.12 | d | 42.55 | 53.41 | h | 58.00 | b | 60.37 | a | 54.31 | d | 44.48 | f | 32.20 | e | 15.00 | g | 39.33 | c | ||
1984 | 18.26 | h | 20.68 | j | 27.32 | i | 35.79 | f | 49.04 | g | 59.33 | f | 60.13 | 61.32 | c | 48.59 | c | 42.24 | b | 31.60 | 24.35 | e | 44.71 | f | ||
1985 | 20.20 | a | 22.42 | d | 32.83 | g | 42.07 | 49.77 | e | 59.23 | d | 60.04 | c | ----- | z | 54.00 | a | 42.87 | 28.63 | 18.45 | 39.77 | b | ||||
1986 | 24.77 | 25.79 | 33.39 | 42.00 | 48.03 | 58.50 | 63.06 | 60.32 | 55.33 | 43.71 | 29.60 | 25.68 | 42.52 | |||||||||||||
1987 | 20.68 | 29.32 | 27.39 | 34.60 | 50.13 | 59.00 | 61.97 | 61.06 | 53.03 | 39.84 | 28.93 | 20.45 | 40.53 | |||||||||||||
1988 | 17.35 | 20.66 | 25.90 | 36.47 | 47.26 | 58.07 | 61.03 | a | 62.29 | 52.63 | 42.68 | 29.20 | 20.55 | 39.51 | ||||||||||||
1989 | 22.13 | 21.36 | 29.42 | 40.10 | 50.61 | 56.19 | d | 59.45 | 60.58 | 49.30 | 38.71 | 25.90 | 14.81 | 39.05 | ||||||||||||
1990 | 21.84 | 23.82 | 31.74 | 39.70 | 45.48 | 60.48 | a | 60.17 | a | 58.77 | 56.37 | 38.81 | 31.57 | 16.45 | 40.43 | |||||||||||
1991 | 19.48 | 24.30 | a | 30.16 | 38.03 | a | 50.84 | 58.86 | a | 61.29 | 60.87 | 52.54 | b | 39.16 | 26.60 | 25.39 | 40.63 | |||||||||
1992 | 24.42 | 27.44 | b | 31.37 | a | 40.97 | 48.50 | a | 55.17 | 60.68 | 58.94 | 52.60 | 40.60 | a | 25.17 | 21.58 | 40.62 | |||||||||
1993 | 22.06 | 21.93 | 28.55 | 36.57 | 47.35 | 57.90 | 64.19 | 60.84 | 49.57 | 39.77 | 24.60 | 21.83 | a | 39.60 | ||||||||||||
1994 | 18.10 | b | 19.78 | e | 31.52 | 38.27 | 50.68 | ----- | z | 60.90 | 59.74 | 52.34 | a | 41.48 | 30.47 | 25.10 | a | 38.94 | a | |||||||
1995 | 24.39 | 26.54 | 29.61 | 35.78 | c | 46.90 | 56.63 | 60.58 | 62.06 | 54.07 | 38.97 | a | 30.53 | 23.71 | 40.81 | |||||||||||
1996 | 17.83 | b | 25.00 | 25.45 | 36.45 | a | 53.42 | 59.61 | b | 63.57 | a | 61.10 | 52.30 | 40.71 | 30.48 | c | 21.73 | a | 40.64 | |||||||
1997 | 20.73 | a | 23.92 | b | 29.94 | 33.77 | 47.67 | a | 56.07 | 61.80 | a | 60.84 | 56.24 | a | 41.90 | 28.73 | 22.19 | 40.32 | ||||||||
1998 | 25.29 | 28.29 | 27.81 | 34.57 | 48.83 | b | 56.30 | 63.97 | 59.57 | a | 56.33 | 46.61 | 34.83 | a | 24.77 | 42.26 | ||||||||||
1999 | 25.23 | 27.39 | 30.80 | a | 37.07 | 47.16 | 58.30 | 63.32 | 62.23 | 52.70 | 39.81 | 31.33 | 23.45 | 41.57 | ||||||||||||
2000 | 22.39 | 27.00 | 30.84 | 38.57 | 49.23 | a | 59.90 | 62.48 | 60.39 | 51.57 | 46.70 | a | 25.07 | a | 18.06 | 41.02 | ||||||||||
2001 | 21.90 | 26.79 | 30.52 | 39.63 | 48.87 | 58.14 | a | 63.30 | a | 60.84 | 52.17 | 39.27 | a | 35.76 | a | 23.90 | 41.76 | |||||||||
2002 | 22.26 | 20.37 | a | 24.10 | 40.43 | 47.29 | 60.97 | 62.48 | 62.16 | 52.80 | 42.68 | 29.10 | 22.27 | a | 40.58 | |||||||||||
2003 | 23.03 | 22.11 | 30.10 | 37.00 | 48.45 | 56.27 | 61.61 | 62.00 | 50.93 | 43.65 | 31.47 | 21.29 | 40.66 | |||||||||||||
2004 | 23.06 | 21.00 | 37.26 | 40.23 | 49.35 | 57.93 | a | 60.35 | 58.58 | 52.47 | 44.23 | 32.43 | 21.94 | 41.57 | ||||||||||||
2005 | 26.52 | 28.96 | 27.90 | 37.30 | 48.16 | 58.28 | a | 59.16 | 60.16 | 55.33 | 42.00 | 27.50 | 19.84 | 40.93 | ||||||||||||
2006 | 22.06 | 19.29 | 30.87 | a | 41.30 | 50.97 | 59.37 | 62.35 | 62.19 | 50.93 | 42.17 | a | 29.21 | a | 21.23 | 40.99 | ||||||||||
2007 | 18.06 | 22.81 | a | 34.55 | 34.80 | 47.94 | 55.33 | 59.87 | 62.10 | 55.97 | 41.58 | 27.63 | 22.57 | a | 40.27 | |||||||||||
2008 | 18.71 | 21.90 | 28.58 | 35.00 | 46.90 | 58.50 | 62.06 | 60.23 | 50.53 | 40.48 | 29.10 | 21.19 | 39.43 | |||||||||||||
2009 | 17.48 | 25.14 | 31.23 | 37.07 | 48.55 | 58.87 | 61.55 | 59.84 | 50.53 | 37.65 | 30.00 | 17.32 | 39.60 | |||||||||||||
2010 | 19.20 | a | 20.93 | a | 29.33 | a | 39.20 | 47.06 | 61.30 | 62.52 | 60.68 | 55.77 | 41.58 | 26.83 | 24.39 | 40.73 | ||||||||||
2011 | 16.19 | 16.32 | 31.23 | 38.17 | 43.06 | 61.33 | 65.52 | 65.87 | 51.73 | 40.16 | 29.03 | 22.52 | 40.09 | |||||||||||||
2012 | 22.06 | 23.59 | 34.23 | 41.73 | 50.13 | 60.63 | 63.06 | 60.71 | 51.63 | 38.26 | 30.10 | 21.97 | 41.51 | |||||||||||||
2013 | 19.68 | 21.43 | 27.84 | 30.73 | 46.81 | 60.17 | 61.23 | 61.48 | 56.03 | 38.45 | 27.83 | 20.42 | 39.34 | |||||||||||||
2014 | 16.65 | 21.04 | 26.19 | 35.77 | 47.19 | 60.57 | 62.19 | 59.97 | 57.53 | 43.29 | 25.97 | 24.81 | 40.10 | |||||||||||||
2015 | 21.61 | 23.57 | 29.77 | 37.83 | 47.32 | 59.70 | 63.90 | 60.81 | 58.43 | 47.13 | 30.50 | 26.13 | 42.23 | |||||||||||||
2016 | 22.84 | 25.69 | 32.48 | 38.17 | 47.00 | 59.80 | 65.55 | 60.77 | 56.47 | 45.39 | 35.73 | 21.48 | 42.61 | |||||||||||||
2017 | 23.39 | 28.81 | a | 33.84 | 41.23 | 46.74 | 59.40 | 63.23 | 60.55 | 53.83 | 43.48 | 35.43 | 21.94 | 42.66 | ||||||||||||
2018 | 17.71 | 23.23 | b | 32.55 | 35.73 | 54.71 | 61.07 | 63.65 | 61.68 | 55.97 | 44.65 | 28.97 | 24.06 | 42.00 | ||||||||||||
2019 | 22.97 | 23.61 | 29.35 | 39.97 | 48.06 | 57.33 | 63.42 | 65.71 | 61.40 | 38.06 | 28.07 | 28.23 | 42.18 | |||||||||||||
2020 | 26.16 | 23.48 | 38.26 | 38.73 | 51.71 | 62.70 | 67.26 | 65.13 | 52.23 | 40.35 | 36.00 | 24.16 | 43.85 | |||||||||||||
2021 | 24.19 | 18.36 | 32.74 | 38.33 | 51.84 | 62.17 | 63.94 | 63.52 | 58.10 | 46.71 | 35.23 | 32.16 | 43.94 | |||||||||||||
2022 | 21.48 | 18.96 | 31.77 | 41.27 | 52.65 | 63.80 | 68.74 | 65.39 | 59.03 | 47.16 | 31.83 | 25.58 | 43.97 | |||||||||||||
2023 | 27.61 | 27.00 | 32.48 | 38.70 | 53.52 | 60.77 | 66.77 | 66.48 | 60.03 | 45.26 | 36.80 | 29.61 | 45.42 | |||||||||||||
2024 | 22.77 | 31.38 | 35.32 | 41.35 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.83 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.88 | 23.47 | 30.25 | 38.35 | 48.60 | 58.59 | 62.35 | 60.91 | 53.72 | 41.70 | 30.13 | 22.62 | 41.05 | |||||||||||||
S.D. | 3.23 | 3.10 | 3.16 | 2.92 | 2.60 | 2.01 | 2.04 | 1.96 | 2.79 | 2.90 | 3.26 | 3.13 | 1.40 | |||||||||||||
SKEW | -0.18 | 0.30 | 0.01 | -0.32 | 0.16 | 0.14 | 0.60 | 0.86 | 0.39 | 0.17 | 0.20 | 0.26 | 0.86 | |||||||||||||
MAX | 27.61 | 31.38 | 38.26 | 44.00 | 54.71 | 63.80 | 68.74 | 66.48 | 61.40 | 48.06 | 36.80 | 32.16 | 45.42 | |||||||||||||
MIN | 14.29 | 16.32 | 22.19 | 30.73 | 42.55 | 55.17 | 58.00 | 57.06 | 47.93 | 34.52 | 24.43 | 14.81 | 38.52 | |||||||||||||
YRS | 58 | 60 | 58 | 59 | 59 | 58 | 62 | 61 | 61 | 60 | 61 | 61 | 53 |