YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.48 | g | 40.19 | 29.59 | a | 18.17 | a | 29.32 | i | |
1954 | 24.77 | a | 29.00 | a | 25.38 | b | 38.90 | 42.87 | 52.39 | b | 59.13 | 55.84 | 51.87 | 40.94 | 31.30 | 23.27 | a | 39.64 | ||||||||
1955 | 18.97 | a | 15.68 | 24.20 | a | 33.96 | b | 42.00 | 49.17 | 55.53 | a | 56.19 | 50.83 | 41.47 | a | 26.23 | 24.68 | c | 36.58 | |||||||
1956 | 24.37 | a | 18.25 | a | 25.57 | a | 31.43 | 45.87 | 54.40 | 54.80 | a | 53.52 | 50.20 | 40.03 | 22.43 | 22.13 | a | 36.92 | ||||||||
1957 | 18.35 | 28.29 | 25.00 | 29.17 | 37.77 | 48.80 | 55.65 | 53.30 | a | 45.03 | 37.35 | 20.86 | b | 21.93 | b | 35.13 | ||||||||||
1958 | 18.60 | a | 23.04 | 19.13 | a | 28.73 | 43.10 | a | 51.43 | 52.68 | 53.81 | 46.90 | 36.97 | 25.36 | b | 22.55 | 35.19 | |||||||||
1959 | 17.23 | 19.21 | 21.87 | 30.60 | 42.03 | 50.83 | 52.06 | 53.84 | 48.40 | 36.16 | 22.33 | 24.68 | 34.94 | |||||||||||||
1960 | 17.00 | 13.72 | 25.65 | 35.93 | 43.30 | a | 53.60 | 56.19 | 55.16 | 50.17 | 39.13 | 28.53 | 20.07 | a | 36.54 | |||||||||||
1961 | 19.50 | a | 22.57 | 27.13 | 31.40 | 43.10 | 52.40 | 54.68 | 54.84 | 43.33 | 37.93 | a | 24.90 | 18.40 | a | 35.85 | ||||||||||
1962 | 14.61 | 24.92 | b | 21.97 | 35.80 | 45.48 | 49.27 | 54.81 | 56.13 | 49.37 | 41.61 | 30.00 | 22.96 | c | 37.24 | |||||||||||
1963 | 10.68 | c | 23.61 | 25.32 | 36.40 | 45.65 | 51.83 | 57.77 | 55.13 | 51.00 | 44.71 | 29.20 | 16.80 | a | 37.34 | |||||||||||
1964 | 15.80 | a | 12.17 | 19.90 | 32.03 | 42.71 | ----- | z | 57.10 | 52.87 | 47.00 | 38.37 | a | 26.21 | a | 19.10 | 33.02 | a | ||||||||
1965 | 20.84 | 15.54 | 16.93 | a | 34.57 | 39.97 | 47.37 | 54.29 | 52.06 | 44.20 | 39.52 | 32.67 | 25.26 | 35.27 | ||||||||||||
1966 | 15.41 | d | 16.56 | a | 27.55 | 32.10 | 43.81 | 50.47 | 58.42 | 53.29 | 48.77 | 36.73 | a | 30.15 | d | 20.73 | a | 36.17 | ||||||||
1967 | 18.36 | c | 17.89 | 29.42 | 35.27 | 39.39 | 48.93 | a | 55.42 | 52.03 | 45.87 | 37.42 | 27.33 | 14.77 | 35.17 | |||||||||||
1968 | 19.90 | a | 21.63 | b | 25.76 | b | 29.31 | a | 39.03 | 50.70 | 53.61 | 51.94 | 44.23 | 38.13 | 26.37 | 19.42 | 35.00 | |||||||||
1969 | 24.19 | 21.96 | 18.71 | 36.53 | 43.39 | 48.00 | 55.77 | a | 56.65 | 49.27 | 32.10 | 26.73 | 23.94 | 36.44 | ||||||||||||
1970 | 18.60 | a | 23.46 | 21.71 | 29.63 | 43.10 | 49.40 | 55.42 | 56.48 | 44.67 | 32.68 | 26.60 | ----- | z | 36.52 | a | ||||||||||
1971 | 20.42 | 18.07 | 24.06 | 32.03 | 38.87 | 52.33 | 55.29 | 53.55 | 44.83 | 36.68 | 28.83 | 21.06 | 35.50 | |||||||||||||
1972 | 19.58 | 23.14 | a | 30.13 | 35.67 | 42.19 | 52.97 | 54.35 | 53.81 | 48.83 | 39.23 | 21.53 | 18.77 | 36.68 | ||||||||||||
1973 | 18.77 | 21.93 | 26.32 | 27.87 | 41.26 | 49.83 | 54.87 | 54.94 | 45.67 | 38.67 | a | 30.90 | 20.10 | 35.93 | ||||||||||||
1974 | 18.58 | 20.07 | 30.13 | 31.70 | 45.13 | 52.20 | 55.84 | 52.10 | 44.45 | a | 40.58 | 27.13 | 18.42 | 36.36 | ||||||||||||
1975 | 17.71 | 19.04 | a | 23.32 | 30.43 | 39.10 | a | 49.17 | 54.42 | 54.48 | 45.90 | 36.52 | b | 24.97 | 23.45 | 34.88 | ||||||||||
1976 | 17.23 | a | 26.04 | a | 26.19 | 33.70 | 39.58 | 49.90 | a | 54.23 | a | 53.10 | 47.50 | 32.23 | 24.67 | 20.61 | 35.41 | |||||||||
1977 | 15.39 | 21.54 | 23.10 | 34.77 | 44.23 | 53.31 | d | 54.77 | 55.16 | 50.13 | 39.27 | a | 28.07 | 24.74 | 37.04 | |||||||||||
1978 | 17.29 | 18.93 | 27.39 | 36.50 | 40.55 | 52.33 | 56.71 | 52.32 | 47.63 | 38.39 | 29.47 | 15.26 | 36.06 | |||||||||||||
1979 | 10.03 | 20.04 | 25.68 | 33.30 | 40.52 | 49.40 | 54.84 | 51.94 | 48.47 | 38.87 | 22.63 | 22.16 | 34.82 | |||||||||||||
1980 | 19.07 | a | 22.97 | 22.71 | 30.90 | 40.42 | 54.37 | 57.70 | a | 54.52 | 48.67 | 35.94 | 28.00 | 27.97 | 36.93 | |||||||||||
1981 | 23.48 | 21.50 | 27.00 | 37.77 | 40.65 | 53.43 | 55.84 | 52.81 | 48.90 | 38.35 | 32.43 | 22.55 | 37.89 | |||||||||||||
1982 | 17.23 | 20.33 | a | 26.77 | 31.33 | 40.81 | 47.87 | 56.58 | 55.90 | 48.31 | a | 36.27 | a | 26.03 | 21.33 | a | 35.73 | |||||||||
1983 | 22.00 | 23.07 | 25.87 | 28.20 | 38.50 | a | 46.87 | 55.41 | b | 55.87 | 47.90 | 38.42 | 27.77 | 12.93 | a | 35.23 | ||||||||||
1984 | 17.13 | 19.85 | b | 23.27 | a | 29.73 | 43.68 | 50.97 | a | 55.55 | 54.94 | 46.43 | 33.19 | 28.10 | 23.16 | 35.50 | ||||||||||
1985 | 16.42 | 17.30 | a | 28.87 | a | 35.87 | 43.94 | 49.80 | 55.35 | 54.29 | 45.30 | 37.40 | a | 27.50 | 17.77 | 35.82 | ||||||||||
1986 | 24.45 | 24.18 | 30.97 | 35.73 | 41.29 | 50.37 | 53.71 | 52.71 | 45.17 | 34.59 | b | 25.40 | 21.06 | 36.64 | ||||||||||||
1987 | 17.81 | 21.85 | a | 22.23 | 29.37 | 40.53 | a | 50.47 | 52.77 | 52.46 | c | 43.83 | 36.16 | 25.00 | 17.32 | c | 34.15 | |||||||||
1988 | 12.61 | 20.17 | 20.87 | 31.60 | 38.13 | 49.37 | 51.71 | 51.74 | 41.45 | a | 35.97 | b | 26.13 | 16.83 | a | 33.05 | ||||||||||
1989 | 17.39 | 15.29 | 28.27 | a | 33.27 | 43.07 | a | 47.77 | 55.23 | 52.67 | a | 46.07 | 35.55 | 27.37 | 14.00 | 34.66 | ||||||||||
1990 | 17.39 | 18.86 | 26.03 | a | 31.37 | 39.33 | a | 53.03 | 52.37 | a | 52.32 | 49.43 | 35.77 | 29.50 | 16.42 | e | 35.15 | |||||||||
1991 | 17.35 | 24.79 | 23.97 | a | 31.37 | 41.90 | 51.03 | 52.81 | 54.23 | 45.47 | 37.29 | 23.03 | 22.48 | 35.48 | ||||||||||||
1992 | 20.27 | a | 25.36 | a | 29.43 | a | 37.33 | 43.39 | 48.27 | 53.42 | 51.71 | 47.07 | 39.55 | 24.17 | 19.27 | a | 36.60 | |||||||||
1993 | 19.90 | 21.43 | 27.68 | 32.37 | 41.77 | 49.53 | 54.87 | 53.61 | 44.30 | 33.84 | 25.00 | 20.70 | a | 35.42 | ||||||||||||
1994 | 21.39 | 19.60 | c | 27.77 | 33.31 | a | 44.39 | 54.66 | a | 54.48 | 55.45 | 48.03 | 36.13 | 26.80 | 25.06 | 37.26 | ||||||||||
1995 | 20.74 | 26.54 | 27.13 | 29.10 | 38.45 | 48.87 | 54.35 | 56.42 | 47.33 | 36.84 | 30.31 | a | 23.06 | 36.60 | ||||||||||||
1996 | 18.00 | 23.30 | b | 23.39 | 33.55 | a | 46.87 | 52.72 | a | 55.48 | 55.03 | 45.07 | a | 37.28 | b | 29.79 | b | 22.08 | g | 38.23 | a | |||||
1997 | 18.42 | g | 20.57 | g | 28.08 | e | 28.65 | g | 41.89 | c | 51.82 | b | 56.23 | a | 54.45 | 51.60 | e | 37.10 | a | 23.63 | 16.83 | a | 40.18 | c | ||
1998 | 16.93 | a | 20.36 | 20.65 | 30.07 | 45.29 | 50.38 | a | 56.29 | 54.40 | a | 51.47 | 38.76 | b | 32.23 | 21.65 | 36.54 | |||||||||
1999 | 24.57 | c | 24.64 | 28.58 | 29.97 | a | ----- | z | 51.13 | 56.84 | 55.52 | 46.77 | 38.58 | 33.53 | 21.19 | 37.39 | a | |||||||||
2000 | 23.47 | a | 26.41 | 27.67 | a | 35.93 | b | 45.71 | 51.97 | 56.90 | 57.47 | a | 49.73 | 38.67 | a | 22.41 | a | 19.40 | a | 37.98 | ||||||
2001 | 19.43 | a | 23.39 | 27.93 | a | 36.29 | b | 43.65 | 51.73 | 58.48 | 55.45 | 49.60 | 38.50 | a | 32.50 | 21.23 | 38.18 | |||||||||
2002 | 19.77 | a | 18.48 | a | 22.87 | a | 37.10 | a | 43.39 | 54.83 | 56.97 | 55.65 | 47.47 | 35.48 | 27.77 | 21.97 | 36.81 | |||||||||
2003 | 24.90 | 20.61 | 28.13 | 35.73 | 43.94 | 49.13 | 59.35 | 56.52 | 45.00 | 43.03 | 28.43 | 21.48 | 38.02 | |||||||||||||
2004 | 22.17 | a | 19.25 | a | 31.61 | 33.97 | 44.71 | 50.80 | 54.35 | 51.45 | b | 47.23 | 37.67 | a | 27.57 | 22.16 | f | 38.25 | a | |||||||
2005 | 25.87 | 24.26 | a | 25.61 | 32.70 | 43.26 | 50.21 | a | 56.07 | a | 54.16 | 49.93 | 37.63 | a | 30.32 | b | 19.50 | a | 37.46 | |||||||
2006 | 22.50 | a | 19.28 | c | 27.13 | 36.11 | b | 45.94 | 54.14 | a | 57.16 | 54.26 | 42.52 | a | 36.47 | a | 29.90 | 20.07 | d | 37.12 | ||||||
2007 | 16.23 | a | 23.18 | 30.23 | a | 32.57 | b | 42.47 | a | 49.77 | 55.94 | 57.55 | 49.53 | 38.35 | 28.57 | b | 19.32 | 36.98 | ||||||||
2008 | 15.87 | 21.50 | a | 25.80 | a | 30.17 | 39.94 | 51.30 | c | 55.07 | a | 54.45 | 47.60 | 38.61 | 31.41 | a | 20.00 | a | 35.98 | |||||||
2009 | 23.03 | b | 25.48 | a | 27.63 | a | 32.03 | 43.79 | c | 51.55 | a | 56.42 | 54.57 | a | 45.40 | 32.81 | 32.97 | a | 16.87 | 36.88 | ||||||
2010 | 21.52 | b | 18.96 | 26.65 | 35.60 | 40.03 | 54.27 | 56.48 | 55.16 | 51.18 | b | 40.93 | b | 27.79 | a | 24.96 | c | 37.79 | ||||||||
2011 | 19.10 | ----- | z | ----- | z | 33.80 | 38.97 | 53.97 | 58.43 | a | 58.13 | 49.20 | 37.83 | a | 27.48 | a | 18.80 | a | 39.57 | b | ||||||
2012 | 24.23 | a | 20.79 | a | 32.69 | b | 38.43 | 45.23 | 56.17 | 58.84 | 56.26 | 49.79 | a | 35.90 | 32.27 | 20.61 | 39.27 | |||||||||
2013 | 18.29 | ----- | z | 25.57 | a | ----- | z | 42.29 | 54.73 | 56.32 | 55.87 | 50.72 | a | 36.19 | 28.17 | 21.68 | 38.98 | b | ||||||||
2014 | 20.23 | 21.39 | 26.97 | 32.53 | 42.61 | 52.70 | 56.81 | 55.10 | 51.70 | 38.87 | 22.53 | 19.74 | 36.77 | |||||||||||||
2015 | 21.03 | 21.00 | 27.81 | 33.27 | 41.19 | 53.90 | 56.06 | 55.48 | 53.33 | 42.68 | 27.90 | 22.74 | 38.03 | |||||||||||||
2016 | 21.84 | 25.14 | 29.26 | 30.50 | x | 41.00 | g | 52.50 | 56.74 | 54.21 | g | 50.72 | a | 43.19 | 41.33 | x | ----- | z | 39.91 | e | ||||||
2017 | 21.58 | 28.68 | 33.20 | a | 37.10 | j | 40.48 | 49.03 | a | 48.29 | 52.81 | 49.97 | 37.13 | 33.83 | 23.42 | 38.04 | a | |||||||||
2018 | 21.48 | 22.29 | 29.10 | 32.53 | 47.19 | 54.80 | 57.10 | 54.81 | 49.80 | 38.19 | 26.57 | 21.16 | 37.92 | |||||||||||||
2019 | 22.26 | 21.96 | 25.58 | 35.33 | 39.84 | 48.97 | 56.94 | 57.03 | 52.93 | 32.71 | 27.17 | 24.52 | 37.10 | |||||||||||||
2020 | 23.19 | 19.79 | 29.71 | 32.70 | 44.74 | 53.53 | 57.19 | 57.61 | 46.90 | 37.90 | 32.60 | 22.39 | 38.19 | |||||||||||||
2021 | 21.23 | 18.18 | k | 28.74 | 29.67 | 43.13 | 53.70 | 56.81 | 55.58 | e | 52.10 | 39.97 | 34.43 | 26.45 | 40.16 | a | ||||||||||
2022 | 22.23 | 16.11 | 26.32 | 33.57 | 44.61 | 54.43 | 58.10 | 55.71 | 52.83 | 38.87 | 24.00 | c | 21.61 | 37.37 | ||||||||||||
2023 | 21.61 | 21.25 | 26.42 | 32.03 | 45.48 | 51.07 | 57.65 | 57.03 | 51.50 | 40.10 | 30.57 | 24.81 | 38.29 | |||||||||||||
2024 | 19.74 | 25.45 | 29.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.73 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.56 | 21.38 | 26.12 | 33.06 | 42.37 | 51.34 | 55.63 | 54.54 | 48.00 | 37.78 | 27.77 | 20.86 | 36.46 | |||||||||||||
S.D. | 3.26 | 3.46 | 3.28 | 2.73 | 2.35 | 2.19 | 1.91 | 1.67 | 2.74 | 2.57 | 3.25 | 3.03 | 1.27 | |||||||||||||
SKEW | -0.43 | -0.15 | -0.47 | 0.11 | -0.06 | 0.07 | -0.81 | -0.02 | -0.14 | 0.01 | -0.02 | -0.31 | 0.04 | |||||||||||||
MAX | 25.87 | 29.00 | 33.20 | 38.90 | 47.19 | 56.17 | 59.35 | 58.13 | 53.33 | 44.71 | 34.43 | 27.97 | 39.64 | |||||||||||||
MIN | 10.03 | 12.17 | 16.93 | 27.87 | 37.77 | 46.87 | 48.29 | 51.45 | 41.45 | 32.10 | 20.86 | 12.93 | 33.05 | |||||||||||||
YRS | 70 | 67 | 70 | 66 | 68 | 69 | 70 | 69 | 70 | 71 | 70 | 67 | 59 |