YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.43 | w | 47.82 | 33.52 | 22.35 | 34.56 | i | |||
1964 | 18.23 | 17.64 | 22.87 | 34.12 | 45.95 | 52.27 | 60.95 | 55.45 | 50.45 | 42.56 | 29.69 | a | 21.35 | 37.63 | ||||||||||||
1965 | 23.89 | 22.98 | 20.55 | 36.91 | a | 43.89 | 51.25 | 58.21 | 54.37 | 45.87 | 45.11 | 34.07 | a | 26.30 | a | 38.62 | ||||||||||
1966 | 18.68 | 19.30 | 31.29 | 36.12 | a | 47.60 | 53.07 | 61.40 | 57.37 | 51.62 | 41.60 | 31.78 | 21.87 | a | 39.31 | |||||||||||
1967 | 24.16 | 23.16 | 33.19 | 37.82 | 43.47 | 51.08 | 58.98 | 54.69 | 50.27 | 43.34 | 30.85 | 18.55 | 39.13 | |||||||||||||
1968 | 23.44 | 26.00 | 30.08 | 33.55 | 43.58 | 54.88 | 58.03 | 55.26 | 48.42 | 42.56 | 26.65 | 20.34 | 38.57 | |||||||||||||
1969 | 25.27 | 23.61 | 23.53 | 40.23 | 48.65 | a | 50.19 | a | 60.56 | 59.77 | 51.23 | 33.87 | 28.48 | 23.94 | 39.11 | |||||||||||
1970 | 21.06 | 27.20 | 24.79 | 31.17 | 46.69 | 52.92 | 59.05 | 59.10 | 48.63 | 35.58 | 30.00 | 23.10 | 38.27 | |||||||||||||
1971 | 23.68 | 22.30 | 29.31 | 37.08 | 44.69 | 54.76 | a | 57.30 | a | 56.87 | 47.55 | 40.71 | 28.48 | 20.50 | 38.60 | |||||||||||
1972 | 22.34 | 25.95 | 34.50 | a | 38.97 | 45.31 | 55.08 | 58.40 | 56.71 | 50.10 | a | 41.98 | a | 22.73 | 18.48 | 39.21 | ||||||||||
1973 | 19.27 | 23.00 | 27.87 | a | 31.72 | 44.42 | 53.60 | 56.34 | 57.47 | a | 49.72 | 43.27 | 30.18 | 22.48 | 38.28 | |||||||||||
1974 | 20.13 | 23.80 | 33.65 | 35.62 | 48.89 | 55.18 | 58.44 | 55.06 | 48.33 | 42.89 | 29.13 | 19.00 | 39.18 | |||||||||||||
1975 | 21.37 | 21.23 | 28.87 | 33.22 | 43.06 | 51.41 | b | 58.24 | 56.82 | 49.18 | 42.02 | 27.55 | 25.47 | 38.20 | ||||||||||||
1976 | 21.56 | 28.41 | 27.60 | 38.16 | a | 45.37 | 53.47 | 58.85 | 55.58 | a | 49.82 | 38.03 | 29.03 | 22.68 | 39.05 | |||||||||||
1977 | 18.92 | 24.67 | a | 25.89 | 37.65 | 45.47 | 57.27 | 59.11 | 58.05 | 51.52 | 41.92 | 30.87 | 24.82 | 39.68 | ||||||||||||
1978 | 20.94 | 23.66 | 32.29 | 39.18 | 42.61 | 53.77 | 60.53 | 56.05 | 50.68 | 40.84 | 28.40 | 15.71 | 38.72 | |||||||||||||
1979 | 12.82 | 22.61 | 29.77 | 36.97 | 43.53 | 52.32 | 58.87 | 55.69 | 51.97 | 42.95 | 20.83 | 24.47 | 37.73 | |||||||||||||
1980 | 21.66 | 26.76 | 26.72 | b | 32.90 | 42.82 | a | 55.00 | 60.73 | 56.97 | 51.27 | 39.18 | 27.95 | 30.81 | 39.40 | |||||||||||
1981 | 24.35 | 25.70 | 28.80 | c | 42.20 | 44.77 | 57.00 | 59.48 | 56.63 | 51.50 | a | 39.89 | 32.37 | 23.10 | 40.48 | |||||||||||
1982 | 19.00 | a | 23.81 | b | 29.42 | 35.25 | 42.94 | 50.48 | a | 57.90 | a | 58.19 | 48.93 | a | 37.70 | a | 27.08 | 21.16 | b | 37.65 | ||||||
1983 | 24.82 | 24.13 | b | 28.00 | a | 29.10 | 40.98 | 50.84 | a | 59.23 | 58.80 | a | 51.71 | a | 41.89 | 28.39 | b | 16.88 | a | 37.90 | ||||||
1984 | 16.77 | c | 23.35 | b | 26.45 | b | 32.45 | a | 48.37 | 52.38 | 59.53 | 57.00 | a | 49.27 | ----- | z | 28.33 | c | 20.92 | 37.71 | a | |||||
1985 | 17.29 | 19.54 | a | 28.53 | 38.80 | 46.32 | 54.29 | b | 59.29 | s | 57.30 | a | 46.91 | a | 39.55 | 25.87 | 23.02 | a | 36.13 | a | ||||||
1986 | 27.30 | a | 25.50 | 34.77 | 38.40 | 44.82 | a | 55.35 | 57.39 | 57.75 | a | 47.84 | a | 38.02 | 27.88 | b | 20.07 | a | 39.59 | |||||||
1987 | 18.34 | 23.61 | 26.28 | a | 37.62 | b | 46.32 | 54.73 | 58.15 | 56.06 | ----- | z | 42.75 | a | 27.77 | b | 18.35 | 37.27 | a | |||||||
1988 | 18.50 | c | 25.38 | c | 26.55 | c | 36.78 | 45.81 | 56.43 | 57.79 | b | 57.87 | a | 48.95 | 44.53 | b | 28.36 | a | 18.48 | a | 38.79 | |||||
1989 | 19.50 | 18.36 | 33.77 | 38.42 | 46.68 | 50.75 | 59.34 | 55.73 | a | 49.73 | 39.73 | 31.05 | 19.53 | b | 38.55 | |||||||||||
1990 | 21.45 | 22.91 | 30.14 | b | 38.45 | 44.10 | 56.93 | 57.29 | 55.31 | 52.98 | 40.69 | 31.12 | 15.81 | 38.93 | ||||||||||||
1991 | 18.39 | 26.59 | a | 28.27 | 36.16 | a | 45.87 | 54.23 | 57.71 | 56.47 | a | 50.15 | c | 41.13 | 26.03 | 22.08 | a | 38.59 | ||||||||
1992 | 21.30 | a | 24.17 | b | 31.06 | 42.10 | 48.69 | 52.02 | 57.29 | 55.31 | 51.05 | 43.98 | 23.43 | a | 19.90 | a | 39.19 | |||||||||
1993 | 22.23 | a | 21.41 | a | 31.02 | a | 36.10 | 46.09 | b | 53.31 | a | 58.22 | a | 56.26 | 48.78 | a | 38.74 | 24.16 | b | 22.00 | 38.19 | |||||
1994 | 20.21 | b | 22.04 | 33.76 | d | 37.86 | b | 48.40 | a | 58.26 | a | 59.58 | 59.74 | 50.45 | a | 39.45 | a | 25.90 | d | 23.84 | 39.96 | |||||
1995 | 21.25 | a | 30.02 | 30.27 | 33.33 | c | 42.06 | 51.40 | a | 58.35 | d | 59.94 | 49.62 | a | 39.38 | c | 33.68 | 22.76 | 39.34 | |||||||
1996 | 20.85 | 25.46 | b | 29.84 | b | 37.66 | b | 50.40 | 56.79 | a | 60.66 | 57.60 | 47.50 | a | 39.84 | 31.27 | 23.29 | b | 40.10 | |||||||
1997 | 21.95 | 21.55 | 34.83 | a | 32.28 | 46.61 | 54.83 | a | 60.12 | a | 57.29 | 53.98 | 40.63 | a | 26.66 | a | 21.23 | a | 39.33 | |||||||
1998 | 24.43 | b | 23.76 | a | 28.52 | a | 33.77 | b | 47.22 | a | 52.63 | 61.23 | 58.30 | a | 55.42 | 41.13 | a | 32.84 | a | 23.55 | 40.23 | |||||
1999 | 25.79 | b | 27.86 | c | 34.25 | a | ----- | z | 43.77 | a | 53.80 | 61.47 | 58.24 | 48.59 | a | 43.28 | a | 38.02 | 23.74 | b | 41.71 | a | ||||
2000 | 24.70 | a | 28.25 | c | 31.40 | b | 41.29 | a | 49.08 | 56.73 | 61.77 | 60.97 | a | 52.40 | 41.95 | a | 22.66 | a | 23.31 | b | 41.21 | |||||
2001 | 20.63 | 24.13 | a | 30.67 | a | 39.62 | a | 47.73 | c | 57.31 | a | 62.02 | b | 58.11 | 51.76 | c | 42.50 | a | 32.37 | 22.32 | a | 40.76 | ||||
2002 | 21.62 | a | 21.06 | a | 26.90 | a | 40.72 | c | 46.05 | 58.75 | d | 62.44 | 58.59 | b | 50.04 | c | 38.11 | 28.22 | a | 23.89 | 39.70 | |||||
2003 | 29.44 | 21.06 | a | 29.55 | a | 38.23 | 46.84 | 52.47 | 63.47 | 60.52 | 49.00 | 45.30 | a | 28.31 | c | 24.66 | 40.74 | |||||||||
2004 | 23.02 | 20.69 | 36.24 | 37.35 | 46.90 | 52.98 | 57.32 | 54.48 | a | 49.55 | 40.68 | 29.50 | a | 23.97 | a | 39.39 | ||||||||||
2005 | 26.53 | 24.59 | a | 28.02 | 36.62 | 47.56 | 53.30 | 62.39 | 57.02 | 53.35 | 43.61 | 32.35 | 21.79 | 40.59 | ||||||||||||
2006 | 25.00 | 23.12 | 28.89 | 40.07 | 47.60 | 57.93 | 61.13 | 57.19 | 47.02 | 38.89 | 31.98 | 23.27 | a | 40.17 | ||||||||||||
2007 | 18.77 | 25.46 | 34.10 | 36.05 | 45.47 | 55.10 | 61.03 | 59.65 | 52.05 | 42.94 | 33.12 | 18.92 | 40.22 | |||||||||||||
2008 | 17.37 | 22.19 | 26.85 | 34.02 | 43.55 | 53.85 | 60.48 | 57.68 | 49.97 | 41.50 | 34.31 | a | 21.65 | 38.62 | ||||||||||||
2009 | 25.71 | 26.73 | 31.73 | 34.98 | 47.84 | 51.75 | 58.65 | 56.31 | 49.50 | 35.53 | a | 32.25 | 14.98 | 38.83 | ||||||||||||
2010 | 21.90 | 18.45 | 28.39 | 38.23 | 42.65 | 55.58 | 60.92 | 58.39 | 54.30 | 43.52 | 28.80 | 28.76 | 39.99 | |||||||||||||
2011 | 20.74 | 17.88 | 31.48 | 35.78 | c | 41.31 | 54.63 | 61.39 | 60.48 | 50.85 | 40.57 | a | 29.48 | 21.08 | 38.81 | |||||||||||
2012 | 25.76 | 21.14 | 35.29 | 41.56 | d | 46.76 | 58.58 | 61.50 | 58.89 | 51.04 | b | 40.35 | 35.07 | 22.03 | 41.50 | |||||||||||
2013 | 18.81 | 19.80 | a | 28.52 | 31.67 | 43.45 | 56.43 | 59.74 | 58.63 | 53.07 | 39.00 | 30.77 | 19.53 | 38.28 | ||||||||||||
2014 | 24.05 | 23.04 | 30.10 | 35.79 | a | 43.76 | 54.13 | 60.00 | 56.10 | 53.08 | 43.55 | 28.60 | 23.95 | 39.68 | ||||||||||||
2015 | 26.74 | 26.59 | 34.44 | 37.48 | 42.53 | 57.05 | 57.66 | 58.52 | 54.50 | 46.65 | 29.32 | 20.97 | 41.04 | |||||||||||||
2016 | 21.33 | a | 28.03 | 30.10 | 36.55 | a | 42.73 | 59.05 | 60.88 | a | 56.23 | 51.62 | 43.77 | 33.77 | 21.40 | a | 40.45 | |||||||||
2017 | 19.84 | 29.61 | a | 35.72 | a | 36.40 | 43.63 | a | 56.00 | 59.57 | a | 55.55 | 50.50 | 40.40 | a | 36.52 | 25.55 | b | 40.77 | |||||||
2018 | 24.90 | a | 22.91 | a | 29.95 | 36.83 | 47.75 | a | 57.21 | a | 60.48 | 57.52 | a | 53.30 | c | 38.18 | 25.59 | a | 21.03 | 39.64 | ||||||
2019 | 20.98 | 20.75 | b | 27.06 | 37.32 | 38.79 | 51.25 | 59.76 | 58.65 | 54.53 | 33.45 | a | 30.53 | 21.40 | 37.87 | |||||||||||
2020 | 22.87 | 18.67 | 31.16 | 34.13 | 47.44 | 53.85 | 59.95 | b | 60.37 | 50.25 | 41.05 | 30.57 | 19.94 | 39.19 | ||||||||||||
2021 | 21.27 | 20.54 | 26.06 | 33.50 | 44.52 | 56.35 | 60.13 | 57.45 | 54.00 | 40.65 | 35.25 | 27.66 | 39.78 | |||||||||||||
2022 | 22.18 | 17.93 | 27.13 | 36.07 | 44.40 | 54.72 | 60.65 | 58.02 | 53.35 | 40.37 | 24.82 | 21.48 | 38.43 | |||||||||||||
2023 | 19.03 | 20.34 | 23.15 | 33.52 | 46.05 | 51.18 | 60.60 | a | 58.45 | 51.82 | 41.29 | 29.12 | b | 25.92 | 38.37 | |||||||||||
2024 | 20.16 | 24.60 | 28.56 | 36.35 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.44 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.71 | 23.36 | 29.65 | 36.47 | 45.34 | 54.34 | 59.64 | 57.41 | 50.69 | 41.04 | 29.57 | 21.99 | 39.28 | |||||||||||||
S.D. | 3.01 | 3.02 | 3.40 | 2.85 | 2.32 | 2.34 | 1.57 | 1.62 | 2.13 | 2.75 | 3.46 | 2.96 | 0.96 | |||||||||||||
SKEW | 0.00 | 0.06 | -0.15 | -0.19 | -0.23 | 0.14 | 0.09 | 0.18 | 0.12 | -0.40 | -0.09 | 0.17 | 0.33 | |||||||||||||
MAX | 29.44 | 30.02 | 36.24 | 42.20 | 50.40 | 59.05 | 63.47 | 60.97 | 55.42 | 47.82 | 38.02 | 30.81 | 41.50 | |||||||||||||
MIN | 12.82 | 17.64 | 20.55 | 29.10 | 38.79 | 50.19 | 56.34 | 54.37 | 45.87 | 33.45 | 20.83 | 14.98 | 37.63 | |||||||||||||
YRS | 61 | 61 | 61 | 59 | 60 | 60 | 59 | 60 | 59 | 60 | 61 | 61 | 56 |