YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 23.37 | 25.46 | b | 29.69 | 50.53 | 56.98 | 65.02 | 72.08 | 71.05 | 64.32 | 46.37 | 31.45 | 24.82 | 46.76 | ||||||||||||
1949 | 9.63 | 25.43 | 34.77 | 47.15 | 57.61 | 64.10 | 72.84 | 70.47 | 58.35 | 45.94 | 41.47 | 26.76 | f | 47.98 | a | |||||||||||
1950 | 21.65 | a | 33.14 | 31.63 | 41.97 | 50.85 | 66.37 | 69.27 | 67.81 | 58.68 | 54.23 | 35.03 | a | 32.31 | 46.91 | |||||||||||
1951 | 23.71 | 31.11 | 30.95 | 40.12 | 55.42 | 58.53 | 70.66 | 70.03 | 57.42 | 46.63 | 34.28 | 22.56 | 45.12 | |||||||||||||
1952 | 28.71 | 30.78 | 29.61 | 46.55 | 54.52 | 70.23 | 71.98 | 71.81 | 63.52 | 47.84 | 29.08 | 24.77 | 47.45 | |||||||||||||
1953 | 34.31 | 28.02 | 39.95 | 38.62 | 51.84 | 67.92 | 73.13 | 70.16 | 64.03 | 52.15 | 38.47 | 28.10 | 48.89 | |||||||||||||
1954 | 29.40 | a | 39.32 | 30.00 | 48.80 | 53.02 | 67.37 | 76.60 | 72.26 | 64.30 | 47.55 | 39.33 | 31.53 | 49.96 | ||||||||||||
1955 | 23.06 | 23.14 | 32.39 | 47.93 | 57.08 | 60.60 | 75.24 | 73.68 | 62.33 | 50.90 | 30.62 | 27.66 | 47.05 | |||||||||||||
1956 | 28.24 | 24.62 | 35.90 | 41.08 | 58.05 | 71.95 | 71.50 | 69.39 | 63.48 | 52.50 | 32.77 | 32.77 | 48.52 | |||||||||||||
1957 | 18.77 | 34.41 | 33.21 | 40.08 | 52.50 | 63.38 | 72.87 | 71.63 | 58.70 | 48.45 | 32.82 | 33.89 | 46.73 | |||||||||||||
1958 | 30.31 | 29.45 | 26.76 | 41.42 | 59.69 | 65.10 | 67.94 | 72.16 | 61.73 | 49.97 | 36.93 | 26.65 | 47.34 | |||||||||||||
1959 | 24.71 | 25.09 | 33.97 | 43.92 | 54.02 | 69.60 | 71.56 | 72.94 | 58.98 | 44.84 | 33.33 | a | 33.08 | 47.17 | ||||||||||||
1960 | 23.90 | 21.21 | 33.05 | 48.13 | 55.12 | a | 64.85 | 72.45 | 71.24 | 62.05 | 50.24 | 35.92 | 27.61 | 47.15 | ||||||||||||
1961 | 29.60 | 32.73 | 35.76 | 41.22 | 52.90 | 65.78 | 71.23 | 71.29 | 54.70 | 48.15 | 32.87 | 25.13 | 46.78 | |||||||||||||
1962 | 20.84 | 28.45 | 32.40 | 48.02 | 58.60 | 63.97 | 69.66 | 70.10 | 60.37 | 51.39 | 39.75 | 31.27 | 47.90 | |||||||||||||
1963 | 15.89 | 35.07 | 37.26 | 47.57 | 58.47 | 69.35 | 75.47 | 71.81 | 65.67 | 56.77 | 39.02 | 25.03 | 49.78 | |||||||||||||
1964 | 28.81 | 24.97 | 29.81 | 44.15 | 57.31 | 64.48 | 76.23 | 68.79 | 59.48 | 49.58 | 36.38 | 26.56 | 47.21 | |||||||||||||
1965 | 30.66 | 26.45 | 23.55 | 48.65 | 55.52 | 63.25 | 71.03 | 67.90 | 51.35 | 52.81 | 40.38 | 30.71 | 46.85 | |||||||||||||
1966 | 19.42 | a | 23.96 | 38.48 | 41.00 | 56.84 | 65.00 | 75.26 | 66.35 | 60.25 | 47.68 | 36.72 | 26.24 | 46.43 | ||||||||||||
1967 | 30.90 | 30.95 | 39.85 | a | 46.42 | 49.97 | 61.33 | 70.89 | 68.77 | 60.25 | 49.69 | 33.55 | 21.00 | 46.96 | ||||||||||||
1968 | 26.27 | 31.17 | 38.27 | 42.48 | 50.39 | 66.35 | 71.02 | 67.52 | 58.95 | 49.29 | 33.23 | 22.81 | 46.48 | |||||||||||||
1969 | 24.60 | 30.46 | 28.95 | 48.55 | 57.08 | 59.45 | 72.52 | 72.34 | 64.50 | 39.02 | 36.42 | 29.79 | 46.97 | |||||||||||||
1970 | 25.32 | 33.76 | a | 29.35 | 40.93 | 57.31 | 64.15 | 71.81 | 73.61 | 57.58 | 43.37 | 35.67 | 25.63 | 46.54 | ||||||||||||
1971 | 25.58 | 26.45 | 32.05 | 44.72 | 51.53 | 66.85 | 68.90 | 71.58 | 56.32 | 45.68 | 36.45 | 26.77 | 46.07 | |||||||||||||
1972 | 22.68 | 32.52 | 40.47 | a | 45.41 | a | 54.77 | 66.63 | 68.38 | a | 69.00 | a | 59.57 | 47.02 | 29.15 | 20.47 | 46.34 | |||||||||
1973 | 23.87 | 30.88 | 36.89 | 40.83 | 53.71 | 65.53 | 69.81 | 72.66 | 56.10 | 49.47 | 34.78 | 26.89 | 46.78 | |||||||||||||
1974 | 19.95 | 31.38 | 37.13 | 45.07 | 55.55 | 65.17 | 73.24 | 66.05 | 57.42 | 51.10 | 36.25 | 27.10 | 47.12 | |||||||||||||
1975 | 24.81 | 25.16 | 31.97 | b | 41.72 | 52.66 | 61.75 | 73.31 | 70.50 | 58.28 | 49.40 | 33.40 | 31.16 | 46.18 | ||||||||||||
1976 | 24.73 | 35.20 | a | 32.97 | 45.92 | 53.45 | 64.23 | 72.63 | 70.35 | 59.87 | 44.63 | 32.45 | 30.13 | 47.21 | ||||||||||||
1977 | 17.39 | 33.29 | 32.62 | a | 48.07 | 58.65 | 68.87 | 73.06 | 67.63 | 63.33 | 49.44 | 34.95 | 28.00 | 47.94 | ||||||||||||
1978 | 16.71 | 19.61 | 35.73 | 45.48 | 52.16 | 65.10 | 72.73 | 68.84 | 63.05 | 48.10 | 31.38 | 18.39 | 44.77 | |||||||||||||
1979 | 13.26 | 26.16 | 35.70 | a | 44.90 | 51.45 | 62.65 | 71.00 | 67.55 | 63.67 | 51.15 | 28.73 | 30.32 | 45.54 | ||||||||||||
1980 | 21.23 | 26.97 | 30.65 | 43.42 | 53.11 | 67.47 | 75.52 | 70.16 | 62.77 | 47.15 | 36.83 | 34.60 | 47.49 | |||||||||||||
1981 | 30.81 | 29.57 | 37.23 | 51.70 | 51.61 | 67.25 | 72.74 | 69.32 | 64.52 | 48.82 | 41.38 | 31.35 | 49.69 | |||||||||||||
1982 | 23.40 | b | 28.66 | 36.38 | a | 43.30 | 53.84 | 60.97 | 71.77 | 72.62 | b | 61.05 | 49.24 | d | 31.73 | 30.05 | 46.92 | |||||||||
1983 | 32.66 | 35.93 | 35.60 | 39.92 | 51.26 | b | 61.61 | b | 72.42 | a | 75.29 | 62.85 | 49.52 | 34.63 | 14.22 | b | 47.16 | |||||||||
1984 | 27.22 | b | 32.64 | 34.65 | 39.27 | 57.32 | a | 64.85 | 73.39 | 74.18 | 57.23 | 44.60 | 36.80 | 24.65 | 47.23 | |||||||||||
1985 | 21.12 | b | 25.21 | 38.94 | 49.12 | 59.15 | 63.88 | 72.95 | 70.61 | 56.53 | 46.90 | 22.55 | 20.71 | 45.64 | ||||||||||||
1986 | 29.48 | 28.82 | 43.06 | 46.48 | 53.77 | 67.80 | 72.47 | 69.82 | 58.47 | 47.37 | 33.55 | j | ----- | z | 51.76 | b | ||||||||||
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 | 71.29 | b | 70.03 | 59.75 | 48.38 | a | 32.33 | 28.53 | 51.72 | f | ||||
1997 | 24.63 | 28.86 | 39.26 | 39.12 | 53.68 | 67.12 | 73.48 | 70.53 | 64.18 | 48.65 | 34.12 | 29.10 | 47.73 | |||||||||||||
1998 | 29.94 | 34.27 | 33.89 | 44.13 | 58.08 | 61.37 | 73.89 | 71.95 | 68.14 | b | 47.77 | 39.57 | 25.65 | 49.05 | ||||||||||||
1999 | 31.74 | 36.04 | b | 39.63 | 42.48 | 54.19 | 65.50 | 74.93 | a | 71.53 | 58.03 | a | 50.09 | b | 43.32 | 32.39 | 49.99 | |||||||||
2000 | 30.40 | 35.91 | 38.35 | 46.18 | 58.05 | 65.37 | 75.90 | 76.07 | b | 62.58 | 49.55 | 26.53 | a | 24.67 | a | 49.13 | ||||||||||
2001 | 28.45 | 25.55 | 37.74 | 47.45 | 54.82 | f | 66.43 | 76.53 | 72.47 | 63.70 | 48.77 | 42.34 | e | 28.23 | 48.88 | a | ||||||||||
2002 | 27.63 | 30.34 | 29.79 | 46.50 | a | 54.43 | a | 70.83 | a | 76.20 | a | 70.90 | 61.18 | 41.79 | 35.80 | 32.10 | a | 48.12 | ||||||||
2003 | 32.55 | 24.88 | 38.89 | 47.87 | 55.74 | 62.78 | 77.00 | a | 73.63 | 59.02 | 53.05 | b | 33.80 | 29.98 | 49.10 | |||||||||||
2004 | 29.16 | 28.84 | 41.73 | 46.87 | 57.98 | 63.08 | 70.48 | 67.26 | 63.15 | 50.83 | a | 34.47 | 31.69 | 48.80 | ||||||||||||
2005 | 28.39 | 32.62 | 37.47 | 44.80 | 53.95 | 66.13 | 75.05 | b | 69.60 | 64.30 | 48.95 | 40.73 | 28.35 | 49.20 | ||||||||||||
2006 | 35.90 | 27.39 | 34.55 | 48.72 | 57.73 | 70.98 | a | 76.26 | 72.31 | 56.28 | 46.48 | 37.22 | 28.63 | 49.37 | ||||||||||||
2007 | 18.74 | f | 26.46 | 44.53 | 44.55 | 58.32 | 67.48 | 75.76 | 75.23 | 64.23 | 51.21 | 37.50 | 20.40 | 51.43 | a | |||||||||||
2008 | 20.90 | 29.31 | 37.27 | 43.92 | 53.05 | 63.88 | 74.66 | 70.00 | 60.00 | 48.16 | 39.50 | 22.32 | 46.92 | |||||||||||||
2009 | 29.72 | a | 32.66 | 37.50 | 44.14 | a | 56.84 | 65.43 | 72.29 | 70.45 | 62.67 | 41.10 | 41.40 | 20.28 | d | 47.87 | ||||||||||
2010 | 29.53 | 26.30 | 41.08 | a | 48.57 | 54.94 | 69.17 | 76.02 | a | 75.53 | 65.27 | 53.95 | 36.08 | 31.69 | 50.68 | |||||||||||
2011 | 26.71 | 26.12 | 39.89 | 46.38 | 52.50 | 67.43 | 77.84 | 76.76 | 62.88 | 50.66 | 38.57 | 29.18 | 49.58 | |||||||||||||
2012 | 31.48 | 28.96 | a | 47.15 | 53.20 | 60.19 | 75.73 | 78.65 | 73.08 | 63.75 | 46.77 | 40.15 | 28.17 | a | 52.27 | |||||||||||
2013 | 27.55 | a | 28.14 | 36.39 | 40.03 | 56.45 | 69.15 | 73.23 | 74.10 | 66.67 | 46.68 | 37.12 | 27.84 | 48.61 | ||||||||||||
2014 | 29.11 | 20.20 | 38.58 | 47.83 | 56.73 | 65.23 | 72.87 | 71.65 | 63.88 | 52.19 | 31.98 | 25.95 | 48.02 | |||||||||||||
2015 | 28.69 | 31.77 | 43.65 | 47.32 | 52.15 | 70.12 | j | 72.24 | 70.77 | 66.37 | 52.53 | 35.43 | 25.87 | 47.89 | a | |||||||||||
2016 | 27.56 | 35.17 | 40.65 | 46.25 | 53.85 | 71.42 | 74.73 | 69.66 | 63.15 | 54.97 | 41.13 | 22.98 | f | 52.59 | a | |||||||||||
2017 | 25.53 | 35.43 | 43.45 | 47.32 | 54.12 | a | 66.62 | 75.18 | 68.66 | 62.48 | 47.13 | 40.68 | 26.05 | 49.39 | ||||||||||||
2018 | 28.47 | 25.27 | 38.20 | a | 42.66 | a | 60.40 | 69.88 | 73.63 | a | 70.02 | b | 64.47 | 45.87 | 34.05 | 29.34 | 48.52 | |||||||||
2019 | 29.89 | 20.57 | 31.72 | a | 46.57 | 49.16 | 62.73 | b | 72.87 | 71.35 | 66.02 | a | 40.13 | 34.52 | 30.79 | 46.36 | ||||||||||
2020 | 30.00 | 27.55 | 38.50 | 42.63 | 55.69 | 70.09 | a | 74.08 | l | 75.88 | o | 61.46 | e | 42.55 | c | 40.05 | 30.16 | 43.87 | b | |||||||
2021 | 29.48 | 18.43 | 37.98 | 43.02 | 53.55 | 69.45 | k | 74.75 | i | 72.39 | 66.60 | a | 50.61 | 42.07 | 33.58 | 44.77 | b | |||||||||
2022 | 26.98 | 25.12 | 36.15 | 42.97 | 54.82 | 69.60 | 76.66 | 75.15 | 66.88 | 49.81 | 30.78 | 23.89 | 48.23 | |||||||||||||
2023 | 22.94 | 24.73 | 31.63 | 44.78 | 57.85 | 64.45 | 71.84 | 72.10 | 64.82 | 47.61 | 39.40 | 33.37 | 47.96 | |||||||||||||
2024 | 23.87 | 35.07 | 40.03 | b | 47.25 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.99 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.97 | 28.95 | 35.87 | 44.95 | 55.07 | 65.88 | 73.18 | 71.10 | 61.55 | 48.52 | 35.72 | 27.55 | 47.72 | |||||||||||||
S.D. | 5.02 | 4.55 | 4.55 | 3.26 | 2.71 | 3.25 | 2.35 | 2.35 | 3.38 | 3.39 | 4.09 | 4.19 | 1.44 | |||||||||||||
SKEW | -0.84 | -0.09 | -0.11 | 0.02 | -0.03 | 0.29 | 0.07 | 0.19 | -0.47 | -0.43 | -0.49 | -0.70 | 0.60 | |||||||||||||
MAX | 35.90 | 39.32 | 47.15 | 53.20 | 60.40 | 75.73 | 78.65 | 76.76 | 68.14 | 56.77 | 43.32 | 34.60 | 52.27 | |||||||||||||
MIN | 9.63 | 18.43 | 23.55 | 38.62 | 49.16 | 58.53 | 67.94 | 66.05 | 51.35 | 39.02 | 22.55 | 14.22 | 44.77 | |||||||||||||
YRS | 66 | 67 | 67 | 66 | 65 | 64 | 65 | 66 | 67 | 67 | 66 | 64 | 58 |