YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.60 | 76.26 | 72.43 | a | 63.47 | b | 54.52 | ----- | z | 69.65 | g | |||
1982 | 43.63 | a | 48.06 | a | 55.40 | a | 62.05 | b | 67.85 | a | 78.50 | a | 82.47 | 80.55 | 75.41 | b | 61.74 | b | 50.16 | b | 42.03 | 62.32 | ||||
1983 | 41.80 | a | 48.23 | 53.32 | f | 56.00 | b | 67.00 | b | 76.25 | b | 81.04 | c | 79.27 | a | 76.77 | d | 65.48 | 53.16 | a | 44.98 | c | 62.72 | a | ||
1984 | 42.48 | b | 45.27 | c | 54.62 | c | 60.97 | a | 73.45 | a | 79.15 | c | 81.02 | b | 79.36 | b | 72.83 | c | 60.17 | b | 50.16 | b | 44.90 | f | 63.59 | a |
1985 | 40.43 | b | 44.26 | e | 54.29 | c | 62.97 | a | 71.92 | e | 78.57 | b | 80.40 | 79.29 | 72.35 | 62.93 | a | 52.66 | a | 42.66 | 61.89 | |||||
1986 | 45.45 | 51.41 | 56.85 | a | 66.55 | 70.69 | b | 77.82 | 78.58 | a | 78.85 | a | 73.28 | 62.10 | 50.10 | e | 42.58 | a | 62.86 | |||||||
1987 | 41.44 | 47.66 | 51.73 | 60.80 | 69.45 | 77.72 | a | 80.37 | a | 78.29 | 71.25 | 65.71 | 50.55 | a | 41.35 | 61.36 | ||||||||||
1988 | 42.48 | 48.62 | a | 53.68 | 61.53 | 70.77 | 78.35 | 79.16 | 77.63 | 71.40 | 65.26 | 52.32 | 41.66 | 61.91 | ||||||||||||
1989 | 42.52 | 51.62 | 57.97 | 67.27 | b | 72.87 | 79.27 | 79.83 | a | 77.37 | 72.87 | 62.42 | 52.22 | 40.87 | 63.09 | |||||||||||
1990 | 42.67 | a | 47.17 | a | 55.75 | a | 64.77 | 70.31 | b | 83.32 | 78.02 | a | 75.21 | l | 72.76 | a | 62.18 | a | 52.70 | 44.12 | b | 61.25 | a | |||
1991 | 43.25 | a | 50.46 | a | 53.83 | b | 62.59 | a | 71.35 | 77.83 | 77.57 | a | 77.52 | a | 69.28 | a | 63.05 | 49.04 | b | 44.37 | 61.68 | |||||
1992 | 40.69 | b | 48.13 | b | 55.15 | a | 64.81 | a | 69.47 | b | 77.33 | a | 80.52 | 77.68 | 73.83 | 63.32 | 46.61 | b | 43.63 | a | 61.76 | |||||
1993 | 47.31 | b | 49.32 | 55.78 | a | 64.20 | 72.00 | a | 79.04 | b | 81.50 | d | 79.13 | 72.45 | a | 61.65 | a | 49.97 | a | 43.95 | a | 63.02 | ||||
1994 | 43.50 | a | 48.46 | c | 56.38 | a | 63.12 | a | 72.88 | a | 83.62 | 82.20 | a | 81.39 | 74.29 | a | 63.16 | c | 52.43 | a | 46.35 | 63.98 | ||||
1995 | 44.03 | b | 53.69 | a | 58.72 | b | 61.74 | e | 70.59 | c | 77.81 | a | 80.47 | a | 79.71 | 73.64 | a | 63.37 | 52.98 | 46.19 | b | 63.58 | ||||
1996 | 43.71 | 53.56 | b | 53.37 | a | 64.83 | c | 75.84 | 80.92 | 82.13 | a | 78.38 | a | 72.45 | 64.57 | a | 51.93 | 44.02 | a | 63.81 | ||||||
1997 | 43.10 | a | 48.52 | 58.55 | 61.82 | 73.29 | 78.33 | 80.66 | 79.32 | 77.12 | 62.06 | 50.58 | 40.52 | 62.82 | ||||||||||||
1998 | 45.29 | 47.54 | 53.95 | 59.45 | 70.97 | 78.78 | 82.23 | 78.50 | 76.47 | 65.39 | 54.45 | 44.39 | 63.12 | |||||||||||||
1999 | 46.65 | 51.59 | 57.45 | 62.82 | 70.52 | 77.68 | 79.29 | 78.76 | 74.58 | 61.15 | 54.13 | 41.97 | 63.05 | |||||||||||||
2000 | 47.65 | 52.66 | 56.69 | 66.92 | 75.40 | 79.05 | 81.68 | a | 78.90 | 75.30 | 63.16 | 46.75 | 43.21 | 63.95 | ||||||||||||
2001 | 42.14 | b | 50.46 | a | 55.94 | 64.55 | 73.02 | 79.43 | 81.19 | 78.10 | 74.03 | a | 64.63 | 53.73 | 42.45 | 63.31 | ||||||||||
2002 | 45.15 | 46.88 | 55.32 | 68.83 | 72.11 | 81.65 | 79.79 | 80.76 | 74.02 | 62.98 | 50.38 | 43.21 | 63.42 | |||||||||||||
2003 | 46.92 | 50.16 | 54.71 | 63.22 | 72.60 | 79.22 | 81.63 | 80.84 | 74.55 | 65.84 | 53.45 | 42.61 | 63.81 | |||||||||||||
2004 | 46.40 | 45.22 | 58.66 | 63.10 | 72.66 | 78.23 | 80.56 | 77.65 | 71.33 | 64.48 | 49.92 | 42.44 | 62.56 | |||||||||||||
2005 | 47.82 | 50.27 | 53.55 | 62.43 | 71.71 | 79.02 | 82.18 | 77.95 | 75.23 | 63.55 | a | 52.97 | 44.68 | 63.45 | ||||||||||||
2006 | 46.52 | 51.28 | a | 57.77 | 66.55 | 73.58 | 79.47 | 80.61 | 77.76 | 70.43 | a | 63.11 | 54.31 | a | 41.89 | 63.61 | ||||||||||
2007 | 41.55 | 49.43 | 56.85 | 62.77 | 70.63 | 78.02 | 79.29 | 79.95 | 74.15 | 63.98 | 53.12 | 43.24 | 62.75 | |||||||||||||
2008 | 43.53 | 50.41 | 55.84 | 62.21 | b | 70.11 | 81.14 | a | 78.03 | 77.13 | 69.63 | 63.10 | 51.02 | 46.03 | 62.35 | |||||||||||
2009 | 45.33 | a | 51.00 | 57.23 | 62.17 | 72.97 | 77.78 | 82.61 | 79.31 | 72.02 | 62.63 | 51.63 | 42.44 | 63.09 | ||||||||||||
2010 | 41.58 | 46.77 | 53.42 | 63.62 | 71.21 | 81.42 | 78.15 | n | 79.56 | 74.14 | a | 63.45 | 49.70 | c | 46.77 | a | 61.06 | a | ||||||||
2011 | 42.02 | 43.76 | a | 59.38 | a | 67.29 | b | 69.30 | a | 78.64 | a | 80.31 | 80.18 | 71.22 | a | 60.55 | 48.12 | 37.81 | 61.55 | |||||||
2012 | 43.29 | b | 46.17 | 53.26 | 63.88 | 68.26 | 75.43 | 74.48 | 75.29 | 67.42 | 59.18 | 48.98 | ----- | z | 61.42 | a | ||||||||||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.73 | s | ----- | z | 45.05 | 41.24 | 43.15 | j | ||
2015 | 36.74 | 45.79 | 51.26 | 57.23 | 63.55 | 74.48 | 74.63 | 75.18 | 70.28 | 59.65 | 46.87 | 38.35 | 57.83 | |||||||||||||
2016 | 38.18 | 44.66 | 53.18 | 57.72 | 64.08 | a | 73.60 | 76.21 | 70.24 | 67.35 | 60.65 | a | 49.43 | 42.69 | 58.17 | |||||||||||
2017 | 46.98 | 53.71 | 62.94 | 66.60 | 71.71 | 81.07 | 80.23 | 78.68 | 74.40 | 66.94 | 57.57 | 46.23 | 65.59 | |||||||||||||
2018 | 44.03 | 53.45 | 58.55 | 67.32 | 74.23 | 82.30 | 80.66 | 79.98 | 74.72 | 63.40 | 50.40 | 45.45 | 64.54 | |||||||||||||
2019 | 45.45 | 49.79 | 58.29 | 65.23 | 69.05 | 78.52 | 81.55 | 83.08 | 76.27 | 62.74 | 52.78 | 44.82 | 63.96 | |||||||||||||
2020 | 46.10 | 48.88 | 59.40 | 66.30 | 74.06 | 80.35 | 82.95 | 81.73 | 71.63 | 63.13 | 55.88 | 41.50 | 64.33 | |||||||||||||
2021 | 42.89 | 48.70 | 56.60 | 65.28 | 72.98 | 80.75 | 79.82 | 78.71 | 74.35 | 64.63 | 54.10 | 50.63 | 64.12 | |||||||||||||
2022 | 44.16 | 45.41 | 55.10 | 67.05 | 74.08 | 81.27 | 82.37 | 78.94 | 74.12 | 62.63 | 49.40 | 46.52 | 63.42 | |||||||||||||
2023 | 46.23 | 47.66 | 57.26 | 64.05 | 72.37 | 78.63 | 83.85 | 80.68 | 76.88 | 65.52 | 54.58 | 44.74 | 64.37 | |||||||||||||
2024 | 45.97 | 51.22 | 57.53 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.57 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 43.83 | 48.96 | 56.05 | 63.56 | 71.27 | 78.99 | 80.34 | 78.70 | 73.14 | 63.15 | 51.45 | 43.45 | 62.87 | |||||||||||||
S.D. | 2.50 | 2.70 | 2.37 | 2.88 | 2.62 | 2.10 | 2.07 | 2.11 | 2.36 | 1.74 | 2.66 | 2.40 | 1.54 | |||||||||||||
SKEW | -0.55 | -0.01 | 0.32 | -0.57 | -1.03 | -0.11 | -1.14 | -1.49 | -0.54 | -0.16 | -0.22 | 0.26 | -1.65 | |||||||||||||
MAX | 47.82 | 53.71 | 62.94 | 68.83 | 75.84 | 83.62 | 83.85 | 83.08 | 77.12 | 66.94 | 57.57 | 50.63 | 65.59 | |||||||||||||
MIN | 36.74 | 43.76 | 51.26 | 56.00 | 63.55 | 73.60 | 74.48 | 70.24 | 67.35 | 59.18 | 45.05 | 37.81 | 57.83 | |||||||||||||
YRS | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 40 | 41 | 41 | 42 | 39 | 35 |