YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.57 | i | 67.40 | 57.91 | a | 50.82 | 58.71 | i | ||
1938 | 48.98 | 44.93 | 47.73 | a | 58.47 | 65.68 | 75.05 | h | 85.05 | c | 83.47 | a | 80.47 | k | 61.37 | a | 49.57 | 48.61 | 59.39 | b | ||||||
1939 | 45.47 | a | 41.52 | b | 52.34 | 63.14 | a | 68.92 | a | 77.39 | b | 84.24 | 84.29 | ----- | z | 63.69 | 59.05 | b | 51.72 | a | 62.89 | a | ||||
1940 | 48.03 | a | 47.73 | a | 55.82 | 60.48 | 72.55 | a | 81.57 | 80.89 | 85.87 | 70.40 | 65.43 | a | 50.03 | a | 48.15 | 63.91 | ||||||||
1941 | 45.90 | a | 49.04 | 51.18 | 51.29 | a | ----- | z | ----- | z | ----- | z | ----- | z | 70.95 | b | 59.66 | 55.26 | c | 44.03 | 53.41 | d | ||||
1942 | 46.17 | a | 44.74 | a | 52.79 | 57.62 | 64.68 | 77.65 | 87.55 | 85.11 | d | 74.40 | a | 67.96 | e | 54.89 | b | 49.45 | 63.58 | |||||||
1943 | 45.90 | 49.96 | a | 56.52 | 62.56 | c | 70.04 | d | 72.10 | 83.77 | 81.31 | 78.63 | 65.52 | 54.45 | 43.53 | 63.69 | ||||||||||
1944 | 43.19 | 42.09 | 48.85 | 55.95 | a | 66.56 | 69.43 | 81.22 | a | 82.65 | 76.83 | 65.61 | 48.50 | 45.16 | 60.50 | |||||||||||
1945 | ----- | z | 42.45 | g | ----- | z | ----- | z | ----- | z | 76.07 | 87.00 | 80.50 | 76.88 | 64.87 | 51.93 | 43.98 | 68.75 | e | |||||||
1946 | 45.40 | 45.91 | a | ----- | z | 63.53 | 67.95 | 76.90 | 83.08 | 83.02 | 76.03 | 58.10 | 44.37 | 46.53 | 62.80 | a | ||||||||||
1947 | 43.65 | a | 51.20 | 55.27 | 61.33 | 72.52 | 74.72 | 83.10 | a | 78.56 | 78.42 | 64.38 | a | 48.55 | 43.60 | 62.94 | ||||||||||
1948 | 49.27 | 45.67 | 47.15 | 58.53 | 65.40 | 75.32 | 81.08 | f | 81.24 | 76.78 | 65.15 | 51.45 | 41.21 | 59.74 | a | |||||||||||
1949 | 31.47 | 42.21 | 49.03 | 64.18 | 66.60 | 79.25 | 84.24 | 80.11 | 78.02 | 63.42 | 61.37 | 44.48 | a | 62.03 | ||||||||||||
1950 | 40.31 | 52.29 | 54.24 | 64.42 | 68.90 | 76.15 | 84.81 | 83.52 | 73.37 | 68.94 | 58.97 | 53.57 | j | 65.99 | a | |||||||||||
1951 | 46.13 | 47.84 | 53.58 | 60.28 | 69.45 | 77.47 | 85.68 | 81.94 | 79.55 | 64.10 | a | 51.67 | 42.68 | a | 63.36 | |||||||||||
1952 | 39.44 | 47.47 | 45.26 | 59.17 | 71.44 | 71.37 | 83.08 | 83.53 | 77.05 | 72.37 | 49.03 | 43.81 | 61.92 | |||||||||||||
1953 | 50.74 | 48.34 | 53.05 | 57.42 | f | 59.37 | 73.02 | 87.10 | 80.52 | a | 78.03 | 63.66 | c | 54.72 | 46.50 | 63.19 | a | |||||||||
1954 | 45.65 | 53.82 | 48.34 | b | 64.63 | 72.53 | 74.05 | 85.27 | 78.45 | 74.97 | 65.97 | a | 55.29 | f | 43.44 | 64.28 | a | |||||||||
1955 | 38.60 | 43.12 | 52.31 | 55.76 | a | 65.63 | 75.45 | 80.82 | 84.73 | 77.18 | 67.88 | a | 53.02 | 48.12 | a | 61.88 | ||||||||||
1956 | 48.65 | 43.86 | 54.13 | 56.97 | 67.23 | 77.85 | 81.53 | 79.19 | 78.42 | 61.65 | a | 53.85 | 48.19 | 62.63 | ||||||||||||
1957 | 39.71 | 52.61 | 53.79 | 61.61 | b | 63.24 | d | 80.12 | 83.31 | 80.97 | 74.72 | 59.27 | a | 47.70 | 47.73 | 62.06 | ||||||||||
1958 | 47.55 | 49.88 | 45.89 | 56.52 | 70.70 | a | 74.40 | a | 81.50 | 84.81 | 77.00 | 67.38 | e | 53.16 | a | 52.48 | 63.44 | |||||||||
1959 | 48.19 | 44.89 | a | 57.31 | 65.90 | 65.37 | 80.28 | 87.95 | 80.87 | 72.32 | 67.19 | 56.15 | 47.26 | 64.47 | ||||||||||||
1960 | 40.19 | 45.38 | a | 57.16 | 60.57 | 67.79 | 82.92 | 85.89 | 83.02 | 78.60 | 63.95 | 50.73 | 45.06 | 63.44 | ||||||||||||
1961 | 46.55 | k | 50.30 | a | 52.18 | 62.95 | 64.80 | a | 82.38 | 86.58 | 81.71 | 72.07 | 64.76 | 49.42 | 43.65 | 64.62 | a | |||||||||
1962 | 44.87 | 45.96 | 48.02 | 64.83 | a | 63.57 | a | 76.98 | 82.34 | 83.23 | a | 77.58 | 66.19 | 56.48 | 49.44 | 63.29 | ||||||||||
1963 | 44.10 | 55.81 | b | 50.55 | 53.38 | 68.73 | 72.24 | a | 82.32 | 79.60 | a | 75.92 | 64.36 | b | 52.21 | a | 47.26 | 62.21 | ||||||||
1964 | 42.87 | 46.98 | 48.94 | 57.15 | 65.31 | 75.33 | a | 84.00 | 81.97 | 73.48 | 70.63 | 47.77 | 47.45 | a | 61.82 | |||||||||||
1965 | 48.32 | 50.12 | 50.85 | a | 55.90 | a | 64.42 | 71.12 | a | 80.65 | 81.79 | 69.62 | 70.37 | 53.58 | 43.13 | 61.66 | ||||||||||
1966 | 42.55 | a | 44.71 | 55.61 | 64.22 | 71.19 | 78.36 | a | 83.08 | 84.52 | a | 74.92 | 65.13 | a | 53.02 | b | 46.11 | 63.62 | ||||||||
1967 | 47.20 | a | 51.81 | a | 53.05 | 47.05 | 67.18 | 73.40 | 85.69 | 84.82 | 75.07 | a | 68.52 | 57.43 | 40.61 | 62.65 | ||||||||||
1968 | 45.37 | a | 53.36 | 53.98 | 58.88 | a | 68.71 | b | 78.62 | b | 83.69 | 78.29 | b | 76.42 | 65.61 | 52.85 | 41.50 | 63.11 | ||||||||
1969 | 47.05 | 42.32 | 50.50 | 59.79 | a | 70.11 | 72.95 | 82.66 | 85.71 | b | 76.77 | f | 60.95 | c | 54.18 | 47.73 | 61.27 | a | ||||||||
1970 | 45.66 | 50.74 | a | 51.63 | 54.14 | a | 70.43 | d | 78.64 | a | 86.14 | b | 84.61 | 74.36 | b | 61.78 | d | 54.10 | a | 41.47 | 62.81 | |||||
1971 | 45.71 | 48.93 | 53.24 | 57.22 | 61.35 | 73.73 | d | 84.19 | b | 83.24 | 74.55 | 60.31 | 51.27 | b | 39.27 | 61.08 | ||||||||||
1972 | 42.68 | a | 51.14 | a | 60.44 | 60.31 | a | 68.83 | a | 77.65 | 85.18 | 79.77 | 72.68 | 58.81 | 48.60 | 40.63 | a | 62.23 | ||||||||
1973 | 40.24 | 46.45 | 45.84 | c | 57.50 | a | 70.08 | 80.29 | a | 84.12 | a | 83.30 | f | 73.97 | a | 64.92 | a | 50.63 | 48.24 | 60.21 | a | |||||
1974 | 41.55 | a | 48.68 | 53.87 | 57.64 | a | 69.68 | a | 79.95 | b | 81.69 | 80.34 | 78.97 | 63.12 | a | 52.62 | 43.53 | 62.64 | ||||||||
1975 | 46.34 | 46.55 | 49.60 | 50.67 | 68.52 | 77.72 | a | 82.15 | 79.79 | 77.42 | 61.84 | 51.75 | 49.68 | a | 61.84 | |||||||||||
1976 | 48.85 | a | 51.96 | q | 50.93 | a | 55.27 | 71.40 | 76.42 | 82.55 | 75.68 | 71.28 | 64.15 | a | 57.15 | 44.33 | y | 65.37 | b | |||||||
1977 | 42.95 | 53.32 | c | 46.42 | 62.43 | 59.00 | a | 79.60 | 84.03 | 82.28 | a | 74.28 | 67.17 | a | 55.93 | a | 51.19 | b | 63.22 | |||||||
1978 | 45.08 | 48.32 | 54.29 | 54.26 | a | 67.58 | 76.97 | 83.00 | 80.95 | 72.62 | a | 69.35 | a | 50.25 | 41.13 | 61.98 | ||||||||||
1979 | 39.56 | 44.35 | b | 51.05 | 58.95 | a | 68.39 | 78.07 | b | 83.03 | a | 79.53 | b | 79.77 | 65.55 | a | 50.95 | 49.16 | 62.36 | |||||||
1980 | 48.73 | a | 50.64 | 48.92 | 58.80 | b | 61.84 | 73.87 | 84.05 | 80.82 | 75.37 | 66.56 | 55.95 | 51.76 | b | 63.11 | ||||||||||
1981 | 48.82 | 52.25 | 51.47 | a | 62.68 | 69.00 | 82.73 | 84.55 | 84.24 | 76.50 | a | 59.34 | 54.72 | a | 49.05 | 64.61 | ||||||||||
1982 | 42.67 | a | 49.15 | b | 47.97 | 57.47 | a | 68.74 | b | 73.61 | b | 81.79 | 81.83 | a | ----- | z | 61.81 | e | 48.00 | a | 42.98 | a | 59.64 | a | ||
1983 | 46.52 | a | 46.98 | a | 49.53 | a | 51.61 | b | 67.48 | b | 74.42 | 79.38 | b | 78.55 | b | 76.89 | b | 63.86 | b | 51.57 | b | 46.47 | a | 61.11 | ||
1984 | 48.37 | 49.43 | 55.78 | b | 56.75 | b | 74.12 | b | 75.98 | a | 83.81 | 80.82 | a | 77.45 | b | 57.88 | a | 48.92 | 38.76 | 62.34 | ||||||
1985 | 42.88 | a | 47.76 | a | 49.60 | a | 64.79 | a | 67.32 | 81.33 | d | 84.71 | b | 80.85 | a | 69.12 | d | 63.68 | c | 48.90 | 46.60 | b | 62.29 | |||
1986 | 50.72 | b | 50.48 | 57.00 | d | 57.95 | b | 69.52 | 78.60 | e | 78.86 | m | 84.70 | a | 68.56 | c | 62.30 | c | 53.98 | b | 45.32 | 61.74 | a | |||
1987 | 41.88 | a | 48.57 | 50.86 | c | 65.33 | d | 66.83 | d | 79.11 | c | 78.45 | c | 81.45 | a | 75.46 | c | 68.83 | e | 50.74 | a | 38.92 | a | 62.20 | ||
1988 | 43.95 | a | 51.05 | a | 54.60 | b | 60.15 | c | 66.85 | d | 75.02 | 85.37 | a | 80.98 | a | 75.20 | b | 71.39 | 53.39 | b | 44.33 | b | 63.52 | |||
1989 | 43.45 | 45.93 | a | 56.92 | 67.65 | c | 68.87 | d | 77.48 | c | 85.09 | b | 78.76 | d | 74.25 | d | 62.76 | 56.47 | 48.83 | a | 63.87 | |||||
1990 | 44.72 | a | 45.54 | 56.62 | a | 62.63 | 67.57 | a | 77.52 | a | 84.32 | 79.95 | 75.45 | 67.26 | 53.27 | 39.76 | 62.88 | |||||||||
1991 | 44.05 | 55.15 | a | 46.10 | b | 57.38 | a | 64.13 | 74.50 | a | 82.32 | 79.82 | c | 77.50 | a | 69.29 | 54.97 | a | 45.94 | 62.60 | ||||||
1992 | 44.87 | 49.57 | 51.27 | c | 63.31 | a | 71.93 | b | 74.23 | 80.03 | 83.32 | 76.83 | 67.00 | c | 50.35 | 40.61 | 62.78 | |||||||||
1993 | 41.93 | a | 45.27 | b | 55.84 | 60.66 | b | 68.47 | a | 74.33 | c | 79.52 | b | 80.10 | 75.20 | 65.22 | a | 51.10 | a | 45.08 | 61.89 | |||||
1994 | 47.97 | 44.86 | 57.03 | a | 61.77 | 67.02 | b | 81.24 | a | 85.08 | 85.17 | b | 75.08 | 61.76 | 44.65 | 45.50 | 63.09 | |||||||||
1995 | 43.74 | 54.48 | 51.35 | 57.23 | 62.35 | a | 72.95 | 82.21 | 83.31 | 78.22 | 67.70 | a | 60.57 | 47.68 | 63.48 | |||||||||||
1996 | 48.95 | c | 51.26 | 54.13 | a | 61.42 | f | 69.95 | c | 78.28 | 85.70 | a | 84.77 | 74.69 | c | 63.79 | b | 54.70 | c | 47.55 | a | 64.89 | a | |||
1997 | 45.31 | e | 48.30 | 59.00 | 60.50 | f | 75.13 | 75.45 | 80.66 | 81.63 | 75.26 | a | 62.50 | a | 52.43 | 42.27 | a | 63.45 | a | |||||||
1998 | 45.84 | 43.09 | 50.82 | a | 53.50 | 57.68 | a | 71.13 | c | 82.78 | a | 83.29 | c | 72.12 | b | 60.44 | 51.44 | e | 44.30 | a | 59.70 | |||||
1999 | 47.87 | a | 47.54 | a | 51.24 | b | 53.38 | a | 65.85 | 75.10 | 79.82 | a | 78.74 | 75.48 | 67.88 | b | 56.43 | 46.89 | 62.19 | |||||||
2000 | 47.87 | 48.87 | b | 52.32 | c | 63.61 | b | 71.79 | b | 79.05 | 81.37 | 81.94 | 74.48 | 63.40 | a | 47.68 | 49.02 | 63.45 | ||||||||
2001 | 42.81 | 42.82 | 54.73 | 55.38 | a | 75.42 | 79.60 | 81.32 | a | 83.37 | 76.65 | 68.43 | a | 53.47 | 42.61 | 63.05 | ||||||||||
2002 | 43.50 | 50.36 | 51.42 | 60.93 | a | 67.68 | 79.23 | 84.84 | 81.87 | 76.08 | 62.72 | a | 54.41 | a | 43.63 | a | 63.06 | |||||||||
2003 | 51.34 | 45.75 | 53.40 | 53.24 | c | 67.71 | b | 78.48 | 86.24 | 81.40 | 78.05 | a | 69.73 | 46.68 | 44.29 | 63.03 | ||||||||||
2004 | 44.06 | 43.95 | 60.16 | 61.24 | a | 69.87 | 77.60 | 83.13 | 80.79 | 73.83 | 60.40 | 48.17 | 44.47 | 62.31 | ||||||||||||
2005 | 45.18 | 46.00 | 51.73 | a | 57.07 | 68.00 | 73.34 | a | 86.42 | 81.77 | 71.10 | 62.53 | 54.85 | 47.35 | 62.11 | |||||||||||
2006 | 45.05 | 49.04 | a | 46.44 | 56.12 | 71.20 | a | 80.07 | 85.52 | 79.18 | a | 73.98 | 61.11 | 55.43 | 43.92 | 62.25 | ||||||||||
2007 | 42.16 | 49.46 | 58.24 | 62.00 | 69.84 | 77.55 | b | 84.76 | 82.63 | 72.17 | 61.90 | 57.18 | 40.97 | 63.24 | ||||||||||||
2008 | 40.79 | b | 47.33 | 54.32 | 59.82 | 66.31 | 78.20 | b | 83.13 | a | 83.60 | b | 76.92 | 65.56 | e | 56.28 | 42.98 | b | 62.94 | |||||||
2009 | 47.77 | 45.04 | 51.29 | 57.65 | 73.77 | 71.97 | 86.10 | 81.21 | 78.65 | 59.80 | h | 54.07 | 42.74 | 62.75 | a | |||||||||||
2010 | 44.14 | c | 47.04 | b | 50.61 | c | 54.07 | b | 60.74 | d | 78.65 | c | 85.94 | n | 80.22 | k | 77.14 | b | 65.10 | j | 51.04 | c | 46.57 | b | 56.67 | c |
2011 | 45.38 | c | 44.25 | d | 50.50 | i | 60.17 | g | 61.88 | f | 74.29 | a | 81.78 | a | 83.85 | d | 77.60 | f | 67.35 | a | 49.41 | g | 43.14 | m | 66.15 | f |
2012 | 47.83 | v | 50.81 | p | 52.58 | l | 63.50 | m | 68.58 | r | 77.67 | c | 80.98 | e | 84.64 | c | 77.64 | a | 65.52 | a | 55.42 | d | 43.77 | c | 69.38 | e |
2013 | 41.79 | b | 46.80 | a | 58.58 | 61.98 | 69.03 | 79.78 | 85.44 | 80.61 | 76.29 | b | 61.42 | a | 53.37 | 45.00 | 63.34 | |||||||||
2014 | 51.55 | 53.36 | 56.13 | a | 61.39 | b | 69.78 | d | 79.46 | b | 84.31 | e | 80.40 | j | 77.93 | c | 68.91 | d | 56.46 | p | 46.06 | g | 66.98 | c | ||
2015 | 48.81 | e | 55.59 | a | 59.02 | 61.31 | c | 66.50 | b | 80.10 | f | 79.79 | b | 84.79 | 78.35 | 68.00 | a | 48.72 | 42.66 | 63.05 | a | |||||
2016 | 44.60 | 52.67 | 56.31 | 61.50 | 66.22 | b | 83.86 | a | 86.17 | a | 84.19 | 73.92 | 64.81 | b | 55.35 | 45.18 | 64.56 | |||||||||
2017 | 42.73 | 49.98 | 57.12 | c | 61.48 | c | 68.77 | a | 81.27 | 87.23 | e | 84.55 | 75.11 | c | 66.56 | 58.72 | a | 50.58 | g | 66.68 | a | |||||
2018 | 50.60 | a | 48.94 | d | 51.57 | d | 64.87 | d | 69.52 | 81.60 | d | 88.53 | l | 86.67 | j | 79.90 | i | 64.56 | f | 54.91 | a | 45.16 | l | 60.29 | e | |
2019 | 46.04 | e | 40.03 | j | 51.42 | a | 61.30 | c | 61.65 | d | 78.00 | n | 83.96 | f | 85.77 | e | 75.70 | o | 61.88 | a | 54.54 | b | 42.91 | i | 60.37 | e |
2020 | 44.00 | h | 49.15 | c | 49.22 | b | 58.72 | u | 74.19 | w | 76.00 | m | 82.18 | q | 83.07 | x | 78.65 | t | ----- | z | ----- | z | ----- | z | 49.19 | j |
2021 | ----- | z | 50.40 | w | ----- | z | ----- | z | ----- | z | ----- | z | 90.85 | u | 85.56 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | 43.33 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 45.05 | 48.20 | 52.57 | 59.26 | 67.77 | 76.95 | 83.58 | 82.01 | 75.42 | 64.75 | 52.87 | 45.28 | 62.70 | |||||||||||||
S.D. | 3.41 | 3.43 | 3.64 | 4.06 | 3.57 | 3.17 | 2.18 | 2.19 | 2.54 | 3.26 | 3.52 | 3.24 | 0.94 | |||||||||||||
SKEW | -0.71 | 0.17 | 0.05 | -0.44 | -0.51 | -0.10 | -0.18 | -0.22 | -0.67 | 0.03 | -0.06 | 0.09 | -0.53 | |||||||||||||
MAX | 51.55 | 55.81 | 60.44 | 67.65 | 75.42 | 83.86 | 87.95 | 85.87 | 79.77 | 72.37 | 61.37 | 52.48 | 64.61 | |||||||||||||
MIN | 31.47 | 41.52 | 45.26 | 47.05 | 57.68 | 69.43 | 78.45 | 75.68 | 68.56 | 57.88 | 44.37 | 38.76 | 59.70 | |||||||||||||
YRS | 79 | 79 | 79 | 76 | 78 | 78 | 76 | 77 | 75 | 80 | 80 | 76 | 56 |