YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 28.58 | 26.52 | 30.60 | 37.85 | 45.50 | 56.92 | 59.18 | 59.52 | 53.80 | 46.06 | 31.72 | 22.47 | 41.56 | |||||||||||||
1949 | 12.39 | 27.52 | 34.77 | 44.58 | 51.92 | 54.97 | 62.13 | 62.42 | 57.37 | 40.55 | 44.33 | 28.42 | 43.45 | |||||||||||||
1950 | 14.90 | 29.95 | 32.50 | 38.03 | 45.37 | 53.53 | 63.24 | 64.55 | 56.92 | 46.10 | 36.15 | 35.37 | 43.05 | |||||||||||||
1951 | 23.94 | 29.64 | 29.77 | 42.87 | 48.44 | 54.72 | 65.02 | 62.35 | 58.27 | 43.11 | 33.92 | 24.27 | 43.03 | |||||||||||||
1952 | 24.71 | 28.76 | 30.78 | a | 43.58 | 48.27 | 52.70 | 64.31 | 62.87 | 60.47 | 54.37 | 32.35 | 29.42 | 44.38 | ||||||||||||
1953 | 36.73 | 30.91 | 34.21 | 38.53 | 44.42 | a | 48.83 | 63.15 | 61.27 | 59.37 | 48.95 | 39.55 | 31.19 | 44.76 | ||||||||||||
1954 | 28.63 | 36.45 | 31.00 | 40.20 | 49.65 | 50.45 | 61.63 | 57.35 | 52.70 | 44.45 | 40.67 | 28.58 | 43.48 | |||||||||||||
1955 | 26.10 | 25.96 | 27.16 | 34.18 | 42.32 | 55.82 | 59.13 | 63.44 | 55.28 | 46.08 | 28.40 | 27.65 | 40.96 | |||||||||||||
1956 | 28.15 | 23.84 | 33.08 | 43.03 | 50.26 | 51.60 | 65.79 | 62.00 | 57.37 | 43.13 | 34.72 | 31.82 | 43.73 | |||||||||||||
1957 | 17.35 | 30.39 | 34.74 | 41.55 | 51.02 | 56.90 | 61.50 | 59.65 | 59.13 | 42.73 | 32.58 | 31.71 | 43.27 | |||||||||||||
1958 | 30.76 | 36.36 | 32.97 | 38.72 | 54.39 | 57.68 | 66.92 | 67.68 | 54.52 | 50.65 | 34.60 | 35.31 | 46.71 | |||||||||||||
1959 | 29.48 | 29.52 | 33.69 | 41.43 | 43.81 | 55.60 | 65.97 | 59.98 | 51.27 | 45.32 | 35.67 | 31.08 | 43.57 | |||||||||||||
1960 | 24.00 | 26.67 | 36.44 | 41.37 | 44.63 | 56.72 | 70.34 | 58.60 | 56.40 | 45.53 | 33.23 | 29.86 | b | 43.65 | ||||||||||||
1961 | 32.13 | 34.38 | 34.89 | 39.33 | 46.68 | 61.37 | 66.71 | 69.23 | 49.88 | 43.26 | 32.63 | 27.08 | 44.80 | |||||||||||||
1962 | 24.63 | 28.77 | 31.68 | 43.18 | 42.52 | 53.27 | 61.16 | 58.63 | 57.05 | 46.35 | 36.02 | 32.27 | 42.96 | |||||||||||||
1963 | 21.52 | 39.07 | 34.34 | 37.50 | 49.85 | 53.63 | 58.60 | 62.92 | 62.10 | 48.11 | 35.75 | 29.77 | 44.43 | |||||||||||||
1964 | 26.89 | 29.16 | 31.03 | 35.95 | 45.16 | 52.68 | 62.00 | 58.27 | 52.22 | 49.32 | 32.47 | 25.98 | 41.76 | |||||||||||||
1965 | 29.87 | 31.73 | 31.94 | 41.95 | 45.63 | 54.78 | 64.02 | 61.10 | 49.97 | 52.55 | 38.78 | 28.08 | 44.20 | |||||||||||||
1966 | 29.10 | 29.43 | 34.73 | 41.12 | 49.61 | 52.57 | 59.61 | 62.39 | 57.47 | 44.60 | 35.53 | 29.39 | 43.79 | |||||||||||||
1967 | 30.05 | 32.14 | 30.77 | 33.25 | 46.69 | 57.62 | 66.06 | 71.23 | 61.63 | 46.45 | 35.18 | 26.45 | 44.79 | |||||||||||||
1968 | 26.56 | 35.07 | 38.81 | 37.80 | 46.85 | 54.73 | 66.69 | 58.85 | 55.02 | 43.08 | 33.60 | 24.60 | 43.47 | |||||||||||||
1969 | 22.56 | 27.20 | 34.23 | 39.87 | 51.47 | 57.77 | 62.13 | 60.97 | 56.08 | 40.77 | 38.55 | 31.10 | 43.56 | |||||||||||||
1970 | 28.68 | 35.20 | 32.18 | 33.70 | 47.44 | 59.20 | 65.76 | 65.89 | 49.52 | 42.56 | 34.28 | 25.56 | 43.33 | |||||||||||||
1971 | 30.53 | 30.80 | 29.63 | 37.88 | 48.27 | 50.62 | 65.37 | 68.53 | 49.48 | 41.11 | 33.10 | 24.82 | 42.51 | |||||||||||||
1972 | 24.19 | 31.16 | 37.87 | 35.73 | 50.08 | 56.08 | 63.32 | 65.19 | 50.25 | 42.89 | 34.98 | 21.16 | 42.74 | |||||||||||||
1973 | 23.94 | 32.80 | 33.95 | 39.27 | 50.65 | 55.58 | 65.40 | 62.23 | 54.68 | 44.81 | 30.85 | 29.97 | 43.68 | |||||||||||||
1974 | 23.40 | 31.12 | 33.19 | 38.63 | 43.32 | 59.27 | 61.69 | 63.87 | 59.57 | 48.21 | 35.82 | 28.84 | 43.91 | |||||||||||||
1975 | 27.03 | 28.00 | 29.56 | 32.95 | 45.76 | 51.75 | 65.34 | 57.77 | 57.27 | 42.73 | 32.35 | 32.08 | 41.88 | |||||||||||||
1976 | 27.66 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | 43.20 | f | 51.43 | 63.40 | 59.85 | 55.88 | a | 41.69 | 34.90 | 24.35 | 47.36 | e | ||||||
1999 | 29.50 | a | 27.54 | b | 29.60 | 34.70 | 43.95 | 51.67 | 56.13 | 59.92 | 49.05 | 43.61 | 41.18 | 28.65 | 41.29 | |||||||||||
2000 | 28.50 | 32.86 | 33.30 | c | 43.93 | 46.61 | 53.23 | 57.82 | 56.13 | 50.33 | 42.32 | 27.03 | 26.44 | 41.54 | ||||||||||||
2001 | 27.13 | 28.16 | 36.03 | 39.88 | a | 49.06 | 50.60 | 58.13 | 60.32 | 54.62 | 42.94 | 37.68 | 27.79 | 42.70 | ||||||||||||
2002 | 28.19 | 26.95 | 30.35 | 41.53 | 46.10 | 55.02 | a | 61.27 | 54.08 | 49.03 | 37.98 | 38.04 | c | 30.87 | 41.62 | |||||||||||
2003 | 34.18 | 27.04 | 37.74 | 39.62 | 46.92 | 55.10 | 62.47 | 60.26 | 53.68 | 45.84 | 30.93 | 30.53 | 43.69 | |||||||||||||
2004 | 28.69 | 30.48 | 38.00 | 42.52 | 46.58 | 54.20 | 60.89 | 61.24 | 49.95 | 43.47 | 34.32 | 32.15 | 43.54 | |||||||||||||
2005 | 31.39 | 30.55 | 37.21 | 41.65 | 49.34 | 51.28 | 60.35 | 58.55 | 48.67 | 44.24 | 33.37 | 25.77 | 42.70 | |||||||||||||
2006 | 32.15 | 27.46 | a | 33.35 | 41.27 | 48.65 | 55.08 | 62.71 | 57.13 | 52.60 | 40.45 | 35.23 | 28.73 | 42.90 | ||||||||||||
2007 | 24.52 | 32.70 | 39.05 | 40.82 | 47.42 | 53.83 | 63.53 | 57.11 | 49.48 | 43.15 | 32.17 | 25.77 | 42.46 | |||||||||||||
2008 | 24.34 | 32.12 | 31.06 | 35.30 | 48.15 | 51.22 | 58.69 | 58.53 | 51.72 | 43.23 | 39.12 | 25.02 | 41.54 | |||||||||||||
2009 | 26.26 | 30.12 | 29.03 | 37.68 | 48.02 | 54.18 | 61.39 | 60.06 | 54.20 | 38.85 | 34.52 | 21.53 | 41.32 | |||||||||||||
2010 | 33.44 | 32.96 | 34.79 | 39.43 | 43.45 | 51.87 | 58.90 | 57.13 | 52.90 | 44.48 | 32.21 | a | 28.47 | 42.50 | ||||||||||||
2011 | 27.42 | 25.38 | 34.08 | 34.90 | 43.66 | 50.53 | 56.32 | 58.98 | 55.98 | 43.95 | 32.33 | 26.94 | 40.87 | |||||||||||||
2012 | 29.97 | 29.60 | 34.60 | 42.58 | 46.19 | 51.83 | 60.82 | 59.95 | 53.60 | 42.84 | 37.40 | 27.16 | 43.05 | |||||||||||||
2013 | 23.71 | c | 30.59 | e | 36.24 | 40.38 | 48.16 | 54.90 | 62.42 | 61.98 | 55.33 | 40.61 | 34.57 | 25.75 | a | 42.89 | ||||||||||
2014 | 32.77 | 28.75 | 37.39 | 41.67 | 48.65 | 53.50 | 65.53 | 61.52 | 54.75 | 49.48 | 32.85 | 31.98 | 44.90 | |||||||||||||
2015 | 32.92 | 37.73 | 40.98 | 40.90 | 50.52 | 60.73 | 62.82 | 60.98 | 51.17 | 49.11 | 30.83 | 28.08 | 45.57 | |||||||||||||
2016 | 30.18 | 36.83 | 38.60 | 47.08 | 49.42 | 55.50 | 59.31 | 59.31 | 50.87 | 45.52 | 41.82 | 21.31 | 44.64 | |||||||||||||
2017 | 19.48 | 31.39 | 38.05 | 41.18 | 49.15 | 55.98 | 63.02 | 62.97 | 54.13 | 42.44 | 36.27 | 24.40 | 43.20 | |||||||||||||
2018 | 33.71 | 27.75 | 34.55 | 41.75 | 52.68 | 54.82 | 62.80 | a | 60.40 | 49.43 | 43.55 | 35.68 | 28.16 | 43.77 | ||||||||||||
2019 | 30.81 | 23.36 | 29.85 | 41.77 | 49.77 | 54.55 | 59.76 | 62.05 | 52.43 | 38.74 | 34.98 | 31.56 | 42.47 | |||||||||||||
2020 | 31.87 | 29.40 | 33.90 | 41.48 | 50.00 | 55.32 | 61.32 | 61.21 | 57.48 | 44.98 | 35.03 | 31.10 | 44.43 | |||||||||||||
2021 | 32.27 | 27.68 | 35.36 | j | 42.37 | 47.92 | 60.37 | 65.50 | 60.58 | 53.30 | 43.90 | 38.00 | 27.34 | 45.38 | a | |||||||||||
2022 | 28.48 | 27.43 | 35.48 | 35.42 | 44.27 | a | 54.63 | 63.81 | 65.32 | 55.67 | 47.44 | 28.93 | 25.73 | a | 42.72 | |||||||||||
2023 | 26.66 | 27.12 | 28.84 | 37.45 | 51.92 | 55.30 | 62.39 | 62.60 | 53.00 | 45.31 | 36.23 | 33.87 | 43.39 | |||||||||||||
2024 | 28.23 | 32.24 | 34.06 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.51 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.47 | 30.24 | 33.71 | 39.65 | 47.67 | 54.52 | 62.48 | 61.24 | 54.15 | 44.52 | 34.88 | 28.22 | 43.21 | |||||||||||||
S.D. | 4.70 | 3.43 | 3.10 | 3.15 | 2.77 | 2.76 | 2.92 | 3.30 | 3.50 | 3.29 | 3.33 | 3.34 | 1.20 | |||||||||||||
SKEW | -0.95 | 0.53 | 0.14 | -0.33 | 0.03 | 0.41 | 0.03 | 0.81 | 0.27 | 0.67 | 0.35 | -0.08 | 0.21 | |||||||||||||
MAX | 36.73 | 39.07 | 40.98 | 47.08 | 54.39 | 61.37 | 70.34 | 71.23 | 62.10 | 54.37 | 44.33 | 35.37 | 46.71 | |||||||||||||
MIN | 12.39 | 23.36 | 27.16 | 32.95 | 42.32 | 48.83 | 56.13 | 54.08 | 48.67 | 37.98 | 27.03 | 21.16 | 40.87 | |||||||||||||
YRS | 54 | 54 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 52 |