YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 61.48 | 53.87 | 44.29 | 53.21 | i | |||
1965 | 46.68 | 42.27 | 47.35 | 65.90 | 70.89 | 77.47 | 81.45 | 78.39 | 74.05 | 61.27 | 57.20 | 48.77 | 62.64 | |||||||||||||
1966 | 38.52 | 41.73 | 55.97 | 62.23 | 70.24 | 78.58 | 84.50 | 78.37 | 72.77 | 60.38 | a | 56.57 | 42.40 | 61.86 | ||||||||||||
1967 | 43.16 | 46.16 | 60.55 | 68.13 | 70.29 | 79.15 | 78.50 | 77.15 | 69.55 | a | 62.71 | 53.50 | 40.76 | 62.47 | ||||||||||||
1968 | 43.29 | 43.26 | 51.85 | 59.68 | 71.23 | 77.68 | 78.55 | 80.47 | a | 71.45 | a | 65.85 | 51.02 | a | 43.94 | 61.52 | ||||||||||
1969 | 47.39 | 47.71 | 46.52 | 63.73 | 68.42 | 79.03 | 84.73 | 82.72 | a | 74.17 | 62.65 | 50.28 | a | 46.87 | 62.85 | |||||||||||
1970 | 39.88 | a | 46.54 | 47.90 | 62.58 | 68.58 | 77.28 | 81.42 | 80.85 | 73.68 | 58.87 | 49.30 | 50.35 | 61.44 | ||||||||||||
1971 | 46.27 | 46.84 | 53.87 | 62.53 | 71.73 | 78.07 | 80.21 | 74.52 | a | 71.87 | 64.03 | 53.12 | 47.63 | 62.56 | ||||||||||||
1972 | 44.55 | 47.88 | 60.32 | 69.43 | 70.34 | 78.18 | 79.37 | 76.90 | 75.70 | 63.19 | 45.78 | a | 42.35 | 62.83 | ||||||||||||
1973 | 37.56 | 43.20 | 54.73 | 57.93 | 69.52 | 76.53 | 80.32 | 78.66 | 73.23 | 64.68 | 57.45 | 45.19 | 61.58 | |||||||||||||
1974 | 42.13 | 47.20 | 62.74 | 64.72 | 74.52 | 78.85 | 81.32 | 77.32 | 66.08 | 62.26 | 51.25 | 42.56 | 62.58 | |||||||||||||
1975 | 44.23 | 44.87 | a | 51.89 | 60.85 | 69.67 | a | 77.90 | 76.81 | 78.37 | 68.13 | 62.79 | 52.25 | 44.61 | 61.03 | |||||||||||
1976 | 40.61 | 52.36 | 56.18 | 63.90 | a | 67.10 | 78.60 | 75.11 | 77.42 | 71.33 | 56.00 | b | 45.05 | 41.35 | 60.42 | |||||||||||
1977 | 36.55 | 47.33 | a | 52.18 | 60.65 | 72.56 | 78.52 | 80.55 | 82.52 | 79.32 | 64.53 | 52.02 | 46.31 | 62.75 | ||||||||||||
1978 | 36.68 | a | 39.30 | 54.00 | 68.82 | 72.60 | 77.80 | 82.55 | 78.13 | 72.43 | 61.74 | 52.85 | 41.66 | 61.55 | ||||||||||||
1979 | 33.94 | 42.71 | 53.72 | a | 64.37 | 69.45 | a | 75.28 | 81.16 | 77.58 | 73.18 | 66.40 | 47.50 | 44.68 | 60.83 | |||||||||||
1980 | 43.69 | 45.33 | 52.05 | 60.23 | 70.96 | c | 82.05 | 85.13 | 81.13 | 74.55 | 60.05 | 48.03 | a | 45.87 | 62.42 | |||||||||||
1981 | 43.13 | 48.21 | 51.65 | 64.68 | 69.15 | 77.02 | 81.65 | 79.11 | 74.60 | a | 64.16 | 54.43 | 46.74 | 62.88 | ||||||||||||
1982 | 42.55 | 43.18 | ----- | z | 63.50 | 69.83 | a | 76.79 | a | 82.03 | 83.06 | 75.95 | 63.70 | a | 51.45 | a | 43.48 | 63.23 | a | |||||||
1983 | 41.30 | a | 47.12 | 54.02 | a | 59.72 | 71.60 | 75.88 | 81.76 | 82.00 | 76.37 | 66.06 | 54.23 | 34.48 | 62.05 | |||||||||||
1984 | 38.56 | 46.81 | 54.44 | 62.43 | 73.20 | a | 80.85 | c | 80.80 | c | 80.79 | c | 71.61 | c | 61.94 | 50.54 | f | 45.98 | i | 65.14 | b | |||||
1985 | 38.38 | c | 43.35 | e | 56.38 | c | 66.30 | b | 73.40 | e | 76.46 | e | 79.40 | 81.74 | 73.78 | 64.35 | a | 56.40 | a | 40.44 | 62.53 | |||||
1986 | 44.69 | 50.35 | a | 57.16 | 69.12 | 72.39 | 76.25 | 79.81 | 78.97 | 73.97 | 61.61 | 50.68 | 41.89 | 63.07 | ||||||||||||
1987 | 41.83 | a | 48.35 | a | 48.85 | 58.28 | 69.30 | a | 74.83 | 79.21 | 80.66 | 70.25 | 64.37 | 50.28 | a | 43.21 | c | 60.79 | ||||||||
1988 | 37.67 | j | 44.22 | d | 53.10 | 60.82 | 69.19 | 77.02 | 77.98 | 79.65 | a | 72.57 | 63.28 | a | 52.92 | 43.27 | 63.09 | a | ||||||||
1989 | 45.20 | a | 42.46 | 55.62 | c | 64.62 | 77.16 | 76.95 | a | 79.53 | 76.00 | a | 67.07 | a | 59.75 | a | 48.86 | a | 33.87 | a | 60.59 | |||||
1990 | 42.85 | a | 46.80 | 49.87 | a | 59.45 | 66.24 | 80.90 | 74.72 | a | 78.03 | k | 74.57 | 60.63 | 54.43 | a | 41.24 | 59.25 | a | |||||||
1991 | 40.23 | a | 48.61 | 56.45 | 64.33 | a | 75.48 | 77.85 | d | 79.63 | 77.74 | b | 69.65 | 63.67 | b | 46.83 | 44.62 | a | 62.09 | |||||||
1992 | 40.90 | 48.88 | 55.38 | a | 61.75 | 68.29 | b | 76.28 | 80.29 | g | 77.03 | 75.15 | 64.42 | 49.27 | b | 45.48 | a | 60.26 | a | |||||||
1993 | 42.10 | a | 46.04 | 53.69 | b | 62.62 | 70.87 | a | 79.26 | c | 83.18 | 80.27 | 70.97 | 61.37 | 46.82 | 46.47 | 61.97 | |||||||||
1994 | 44.00 | 45.05 | 56.50 | 63.02 | 70.92 | 83.02 | a | 84.53 | 82.24 | 72.03 | 64.40 | a | 53.38 | 45.73 | a | 63.74 | ||||||||||
1995 | 44.34 | 50.66 | 52.58 | ----- | z | 72.82 | 77.88 | 83.60 | 80.61 | 73.97 | 64.47 | 54.16 | b | 44.90 | 63.64 | a | ||||||||||
1996 | 41.45 | 49.32 | d | 52.03 | a | 65.05 | a | 79.84 | 82.92 | 84.44 | 80.21 | 71.17 | a | 62.60 | 51.79 | a | 47.79 | c | 64.05 | |||||||
1997 | 41.93 | c | 45.39 | 56.41 | h | 56.13 | c | 68.95 | a | 76.67 | a | 82.66 | 81.87 | a | 76.22 | 64.44 | 50.14 | a | 42.20 | a | 62.42 | a | ||||
1998 | 48.06 | 48.80 | 53.31 | 62.38 | 78.87 | 85.13 | 86.79 | 80.52 | 77.62 | a | 68.11 | 55.31 | a | 44.42 | 65.78 | |||||||||||
1999 | 47.81 | 54.09 | 55.26 | 65.13 | 73.91 | c | ----- | z | 81.79 | c | 83.92 | a | 75.42 | 63.50 | a | 56.45 | 46.19 | 63.95 | a | |||||||
2000 | 47.45 | 59.62 | d | 59.73 | 67.58 | 80.53 | 78.58 | 85.26 | b | 83.27 | 76.22 | a | 64.85 | a | 46.67 | 40.95 | a | 65.89 | ||||||||
2001 | 40.58 | 49.38 | b | 51.76 | 65.98 | 75.75 | a | 84.05 | 86.71 | b | 83.08 | 73.10 | a | 63.77 | a | 55.45 | 44.42 | 64.50 | ||||||||
2002 | 44.58 | 43.25 | 52.37 | 68.48 | a | 75.08 | a | 81.46 | c | 81.45 | 84.92 | a | 74.95 | 61.83 | b | 48.68 | 43.37 | a | 63.37 | |||||||
2003 | 43.44 | 45.02 | a | 56.88 | b | 66.37 | 76.42 | a | 77.69 | a | 81.85 | 81.68 | a | 72.15 | 64.71 | b | 53.95 | 46.29 | 63.87 | |||||||
2004 | 46.42 | 44.74 | 59.60 | b | 62.59 | b | 74.52 | 80.02 | a | 79.43 | b | 78.97 | a | 72.12 | a | 63.75 | e | 51.18 | 44.40 | 63.15 | ||||||
2005 | 47.53 | b | 47.80 | e | 52.47 | a | 62.21 | k | 72.81 | 79.58 | 81.63 | 77.55 | 75.33 | a | 62.55 | b | 53.85 | 42.74 | 63.08 | a | ||||||
2006 | 47.03 | 47.27 | 57.45 | 66.71 | b | 74.67 | b | 79.63 | 82.09 | b | 83.07 | p | 69.93 | 61.98 | 52.62 | 41.25 | c | 61.88 | a | |||||||
2007 | 37.13 | a | 44.18 | 56.79 | 60.26 | a | 68.27 | 76.64 | a | 77.27 | 78.11 | 74.10 | 65.29 | 52.73 | 43.20 | d | 61.17 | |||||||||
2008 | 40.31 | 48.48 | c | 55.42 | g | 63.83 | 73.53 | 83.02 | 78.73 | 76.89 | 67.56 | c | 60.47 | a | 50.69 | a | 43.02 | b | 62.41 | a | ||||||
2009 | 41.73 | e | 49.22 | c | 56.55 | 61.52 | b | 72.03 | 80.10 | 81.66 | 81.61 | 70.74 | a | 60.31 | 52.03 | a | 39.65 | a | 62.26 | |||||||
2010 | 41.02 | 40.81 | d | 51.27 | a | 62.03 | 70.45 | c | 82.73 | 78.16 | 81.77 | 74.22 | 63.61 | 52.25 | 45.50 | 61.99 | ||||||||||
2011 | 39.70 | a | 41.93 | e | 60.50 | 69.20 | 74.21 | 85.60 | 84.42 | 84.48 | 74.38 | a | 63.13 | 52.53 | 40.53 | 64.22 | ||||||||||
2012 | 44.90 | a | 46.98 | 57.76 | 67.44 | c | 72.67 | a | 80.75 | 80.16 | c | 80.55 | 72.62 | 61.19 | 54.41 | b | 46.23 | 63.80 | ||||||||
2013 | 43.02 | a | 46.45 | 54.76 | 61.68 | b | 71.50 | b | 79.98 | 77.98 | 81.15 | 73.83 | 64.14 | b | 48.66 | a | 40.47 | 61.97 | ||||||||
2014 | 40.10 | b | 45.22 | a | 52.81 | 64.50 | 70.98 | 77.81 | a | 80.11 | c | 80.26 | 73.75 | 67.50 | 47.98 | e | 47.34 | b | 62.36 | |||||||
2015 | 38.77 | 44.38 | 51.58 | 64.13 | c | 70.39 | 74.53 | 79.80 | f | 83.15 | a | 77.72 | a | 65.08 | e | 52.05 | 46.38 | a | 60.74 | a | ||||||
2016 | 42.26 | 48.46 | b | 58.60 | b | 63.18 | 69.00 | d | 74.54 | d | 84.68 | a | 80.85 | a | 74.89 | c | 68.04 | c | 57.67 | d | 45.69 | g | 65.65 | a | ||
2017 | 45.38 | b | 54.28 | a | 61.61 | c | 65.43 | 71.03 | b | 81.02 | a | 82.09 | c | 79.12 | a | 74.21 | b | 61.88 | g | 56.20 | c | 42.71 | 64.83 | a | ||
2018 | 39.23 | 48.86 | 57.76 | d | 62.07 | 78.71 | c | 85.80 | c | 82.97 | a | 80.81 | b | 73.10 | 62.88 | b | 48.16 | e | 43.52 | a | 63.65 | |||||
2019 | 42.85 | a | 49.63 | a | 51.15 | a | 62.39 | b | 68.97 | 78.79 | b | 81.81 | 85.83 | a | 80.09 | b | 62.02 | 48.97 | a | 46.48 | a | 63.25 | ||||
2020 | 45.48 | a | 44.50 | 60.34 | 63.63 | 74.28 | b | 80.85 | 87.08 | 85.40 | 72.26 | e | 63.22 | a | 56.75 | b | 42.50 | a | 64.69 | |||||||
2021 | 40.62 | a | 40.37 | b | 55.48 | 60.84 | b | 68.60 | b | 79.43 | 79.36 | b | 79.98 | d | 75.95 | 66.83 | d | 54.00 | b | 55.75 | c | 63.10 | ||||
2022 | 40.68 | a | 40.31 | b | 52.82 | 68.62 | 79.95 | b | 85.21 | a | 87.39 | 83.41 | c | 75.85 | c | 63.78 | b | 50.05 | a | 44.48 | b | 64.38 | ||||
2023 | 46.12 | b | 44.75 | 56.63 | 64.11 | b | 74.05 | a | 83.07 | a | 85.95 | 86.40 | 81.40 | a | 64.55 | a | 53.15 | 47.59 | b | 65.65 | ||||||
2024 | 38.77 | 51.31 | 55.21 | b | 65.62 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.43 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 42.37 | 46.49 | 54.74 | 63.64 | 72.17 | 79.20 | 81.46 | 80.46 | 73.47 | 63.24 | 51.96 | 44.05 | 62.76 | |||||||||||||
S.D. | 3.23 | 3.68 | 3.57 | 3.04 | 3.30 | 2.84 | 2.89 | 2.61 | 2.94 | 2.22 | 3.15 | 3.36 | 1.34 | |||||||||||||
SKEW | -0.19 | 0.73 | 0.03 | 0.03 | 0.77 | 0.64 | 0.05 | 0.16 | -0.02 | -0.33 | -0.17 | -0.02 | 0.49 | |||||||||||||
MAX | 48.06 | 59.62 | 62.74 | 69.43 | 80.53 | 85.80 | 87.39 | 86.40 | 81.40 | 68.11 | 57.67 | 55.75 | 65.89 | |||||||||||||
MIN | 33.94 | 39.30 | 46.52 | 56.13 | 66.24 | 74.53 | 74.72 | 74.52 | 66.08 | 56.00 | 45.05 | 33.87 | 60.42 | |||||||||||||
YRS | 59 | 60 | 57 | 57 | 59 | 58 | 57 | 57 | 59 | 59 | 59 | 58 | 45 |