YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | 15.52 | h | 22.36 | 30.56 | 42.18 | 47.92 | 58.78 | 65.42 | 62.11 | 59.95 | 43.82 | 39.95 | 27.74 | 45.53 | a | |||||||||||
1950 | 24.24 | 33.12 | 36.05 | 45.02 | 48.66 | 57.52 | a | 66.47 | 61.50 | 54.35 | 52.24 | 40.73 | 31.10 | 45.92 | ||||||||||||
1951 | 26.39 | ----- | z | ----- | z | 39.17 | 55.72 | o | 61.98 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.51 | i | |||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | 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 | 45.04 | c | 59.68 | b | 65.84 | ----- | z | 58.12 | a | 48.08 | 41.57 | 38.60 | a | 50.99 | e | |||
1981 | 34.24 | 34.54 | a | 33.53 | 46.98 | 50.95 | 64.97 | 69.81 | 65.65 | a | 58.28 | e | 42.60 | 41.40 | a | 37.79 | b | 48.39 | ||||||||
1982 | 31.19 | e | 32.77 | 33.76 | b | 40.91 | b | 50.09 | d | 58.08 | 63.52 | b | 63.78 | a | 55.68 | b | 43.77 | c | 35.37 | 29.36 | b | 44.86 | ||||
1983 | 31.90 | 33.06 | a | 34.79 | 35.81 | c | 49.29 | 58.60 | 65.66 | b | 61.15 | 60.48 | 46.27 | a | 37.82 | 35.90 | 45.89 | |||||||||
1984 | 32.69 | 33.77 | a | 39.02 | 41.62 | 57.97 | 59.42 | 64.07 | a | 62.05 | 58.02 | d | 42.02 | b | 35.63 | 25.24 | 45.96 | |||||||||
1985 | 27.34 | 30.94 | a | 35.08 | 48.23 | 53.97 | 62.59 | a | 67.15 | 66.60 | 53.77 | 46.68 | a | 34.97 | 32.67 | b | 46.67 | |||||||||
1986 | 37.59 | b | 34.40 | b | 39.63 | a | 43.78 | 53.62 | b | 63.21 | a | 65.31 | b | 67.61 | 53.33 | 44.05 | 39.38 | 31.59 | b | 47.79 | ||||||
1987 | 29.70 | c | 30.54 | 33.44 | 46.95 | a | 48.42 | 61.00 | 63.12 | a | 64.85 | a | 58.64 | a | 50.55 | a | 37.22 | 27.45 | b | 45.99 | ||||||
1988 | 31.07 | a | 37.04 | b | 38.27 | a | 43.02 | 51.97 | 61.83 | 69.38 | a | 64.11 | 56.80 | 55.08 | 39.98 | 29.62 | b | 48.18 | ||||||||
1989 | 27.18 | c | 32.52 | c | 42.67 | b | 51.00 | 51.70 | a | 60.57 | a | 69.94 | 63.60 | 58.75 | 47.31 | 41.37 | 37.34 | 48.66 | ||||||||
1990 | 32.33 | a | 29.50 | 43.43 | h | 46.85 | 51.29 | e | 61.77 | 64.47 | a | 61.89 | 57.40 | 48.53 | 38.85 | 25.73 | 47.15 | a | ||||||||
1991 | 29.76 | 36.64 | 28.37 | 39.81 | a | 44.06 | 54.77 | 62.71 | 61.06 | 54.77 | 49.17 | a | 37.22 | 29.98 | 44.03 | |||||||||||
1992 | 29.10 | 31.12 | a | 33.97 | 44.57 | 50.58 | 54.38 | 59.06 | 61.87 | 57.22 | 47.56 | 32.83 | a | 24.04 | c | 43.86 | ||||||||||
1993 | 26.19 | 26.11 | 34.26 | 40.32 | 48.58 | 52.50 | a | 59.61 | 59.56 | 53.27 | 44.10 | 33.13 | 29.44 | 42.26 | ||||||||||||
1994 | 31.77 | 24.93 | 35.92 | a | 38.95 | 45.71 | 60.32 | 62.76 | 62.81 | 54.35 | 41.18 | 26.82 | ----- | z | 44.14 | a | ||||||||||
1995 | 25.19 | b | 34.64 | 29.78 | a | 36.13 | 40.31 | 48.28 | c | 58.41 | b | 60.52 | b | 55.31 | a | 44.60 | 40.09 | a | 28.71 | 41.83 | ||||||
1996 | 30.75 | c | 31.24 | 32.52 | 39.72 | a | 47.25 | c | 55.47 | a | 62.45 | 60.00 | b | 51.73 | 43.39 | 39.85 | 35.15 | 44.13 | ||||||||
1997 | 31.59 | d | 33.85 | a | 42.58 | 41.45 | b | 55.76 | b | 58.59 | b | 63.16 | b | 65.66 | 57.00 | c | 46.10 | b | 39.40 | 30.56 | 47.14 | |||||
1998 | 34.41 | b | 30.38 | b | 35.73 | 36.78 | a | 45.52 | 54.02 | 66.20 | a | 66.74 | 55.02 | 44.34 | 38.82 | 32.88 | a | 45.07 | ||||||||
1999 | 36.62 | a | 35.09 | a | 38.66 | b | 36.07 | 48.55 | a | 57.42 | 63.98 | 62.30 | a | 57.05 | 51.02 | d | 43.57 | a | 34.54 | f | 48.21 | a | ||||
2000 | 34.70 | c | 33.93 | 33.97 | b | 42.86 | a | 53.55 | a | 59.93 | 64.57 | a | 65.52 | c | 57.67 | 44.91 | b | 33.10 | a | 36.43 | d | 46.76 | ||||
2001 | 28.60 | b | 30.71 | b | 38.84 | b | 40.45 | 56.91 | b | 62.17 | 62.83 | a | 65.53 | a | 60.41 | a | 52.65 | 38.74 | a | 32.70 | c | 47.55 | ||||
2002 | 32.11 | d | 35.54 | b | 34.97 | b | 46.65 | c | 51.46 | f | 62.48 | a | 67.54 | c | 66.81 | b | 58.17 | a | 42.73 | a | 35.16 | b | 27.26 | b | 46.31 | a |
2003 | 36.53 | a | 29.04 | 35.13 | 36.15 | c | 44.73 | 56.71 | b | 67.28 | a | 63.83 | a | 60.45 | 59.55 | a | 37.62 | a | 31.26 | j | 47.91 | a | ||||
2004 | 31.34 | c | 29.04 | a | 44.33 | b | 43.75 | 52.93 | a | 60.37 | 64.45 | 63.36 | b | 56.84 | a | 45.00 | a | 34.12 | 32.62 | b | 46.51 | |||||
2005 | 30.88 | c | 30.73 | 37.03 | a | 40.72 | a | 51.00 | 57.37 | 66.63 | 61.60 | 55.52 | 47.48 | 42.68 | 35.03 | 46.39 | ||||||||||
2006 | 33.29 | 34.32 | 30.92 | 41.59 | a | 53.16 | 62.20 | 66.15 | 63.53 | 54.83 | 45.24 | 40.92 | 33.89 | 46.67 | ||||||||||||
2007 | 29.26 | 34.96 | a | 40.10 | 44.25 | 53.11 | 60.89 | c | 68.45 | a | 65.45 | a | 56.42 | 47.40 | 43.10 | 29.95 | 47.78 | |||||||||
2008 | 27.81 | b | 32.05 | 37.80 | a | 42.45 | 47.69 | 60.08 | 65.34 | 65.89 | 57.45 | 48.24 | 42.18 | 31.13 | 46.51 | |||||||||||
2009 | 35.33 | a | 30.18 | 35.79 | 41.08 | 55.32 | 54.30 | 66.50 | 63.37 | 60.20 | 45.07 | a | 40.52 | 28.69 | 46.36 | |||||||||||
2010 | 31.73 | 30.30 | 35.47 | 38.15 | 45.02 | 60.42 | 67.31 | 64.18 | 59.85 | 47.61 | 37.57 | 36.61 | 46.18 | |||||||||||||
2011 | 32.97 | 30.96 | 37.44 | 42.75 | 46.87 | 57.40 | 63.98 | 65.89 | 57.68 | 48.79 | 37.40 | 30.24 | 46.03 | |||||||||||||
2012 | 37.37 | 33.21 | 39.66 | 44.52 | 54.27 | 61.42 | 64.15 | 64.94 | 58.50 | 50.68 | 41.03 | 31.76 | 48.46 | |||||||||||||
2013 | 28.95 | 31.80 | 41.53 | 44.47 | 51.73 | 63.48 | 66.56 | 64.39 | 55.17 | 43.65 | 38.10 | 31.08 | 46.74 | |||||||||||||
2014 | 38.35 | 36.88 | 38.73 | 43.90 | 52.65 | 61.47 | 67.53 | 64.06 | 62.53 | 54.08 | 41.77 | 33.69 | 49.64 | |||||||||||||
2015 | 36.13 | 41.09 | 41.87 | 43.02 | 47.71 | 63.27 | 63.18 | 66.27 | 61.37 | 49.73 | 35.43 | 31.73 | 48.40 | |||||||||||||
2016 | 30.39 | 38.78 | 40.83 | a | 43.82 | 47.23 | 65.45 | 67.53 | 64.74 | 57.47 | 51.31 | 41.19 | a | 32.39 | 48.43 | |||||||||||
2017 | 27.32 | a | 35.43 | 41.27 | a | 44.88 | 51.11 | 64.18 | 68.58 | 63.31 | 54.92 | 48.85 | 45.30 | 38.23 | 48.61 | |||||||||||
2018 | 37.21 | 32.63 | a | 36.63 | 47.52 | 51.21 | 63.15 | 66.48 | 66.50 | a | 60.77 | 45.56 | 40.00 | 32.33 | a | 48.33 | ||||||||||
2019 | 32.58 | 25.38 | 34.50 | 44.92 | 44.05 | 58.42 | 66.00 | 66.40 | 57.77 | 45.70 | a | 39.53 | 31.93 | a | 45.60 | |||||||||||
2020 | 35.06 | 35.19 | 35.13 | 42.55 | 54.10 | 59.75 | 67.35 | 69.07 | a | 61.62 | 53.60 | 39.08 | 33.52 | 48.83 | ||||||||||||
2021 | 31.77 | 34.96 | 34.21 | 45.80 | 51.98 | a | 64.39 | b | 66.93 | c | 64.82 | 60.17 | a | 44.80 | a | 44.00 | a | 31.97 | a | 47.98 | ||||||
2022 | 31.90 | 33.70 | c | 39.80 | a | 44.42 | 51.22 | a | 60.63 | c | 66.81 | b | 62.95 | 59.77 | 48.91 | b | 32.85 | f | 31.89 | 48.36 | a | |||||
2023 | 27.53 | 25.83 | a | 26.98 | g | 39.27 | 48.46 | d | 53.97 | 69.94 | 63.15 | e | 54.91 | b | 44.81 | d | 37.50 | 35.39 | 45.52 | a | ||||||
2024 | 32.21 | 31.22 | 31.14 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.72 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.58 | 32.31 | 36.62 | 42.51 | 50.07 | 59.57 | 65.45 | 64.02 | 57.39 | 47.37 | 38.71 | 31.89 | 46.61 | |||||||||||||
S.D. | 3.50 | 3.65 | 3.66 | 3.49 | 3.81 | 3.59 | 2.65 | 2.14 | 2.52 | 3.83 | 3.49 | 3.48 | 1.81 | |||||||||||||
SKEW | 0.01 | -0.44 | -0.01 | -0.09 | -0.22 | -0.83 | -0.60 | -0.03 | -0.05 | 0.91 | -0.89 | -0.05 | -0.76 | |||||||||||||
MAX | 38.35 | 41.09 | 44.33 | 51.00 | 57.97 | 65.45 | 69.94 | 69.07 | 62.53 | 59.55 | 45.30 | 38.60 | 49.64 | |||||||||||||
MIN | 24.24 | 22.36 | 28.37 | 35.81 | 40.31 | 48.28 | 58.41 | 59.56 | 51.73 | 41.18 | 26.82 | 24.04 | 41.83 | |||||||||||||
YRS | 46 | 46 | 43 | 46 | 45 | 47 | 46 | 45 | 46 | 46 | 45 | 43 | 37 |