YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.15 | k | 46.42 | 45.66 | 46.04 | j | ||
1939 | 42.94 | 39.73 | 53.50 | 62.62 | 68.19 | 76.34 | e | 83.42 | 81.32 | a | 74.05 | 60.50 | b | 52.72 | 46.38 | f | 63.21 | a | ||||||||
1940 | 45.47 | 48.09 | 56.06 | 61.68 | 70.73 | 79.67 | 82.81 | 81.21 | 73.54 | d | 63.16 | 48.23 | 45.34 | 63.00 | ||||||||||||
1941 | 44.19 | 49.74 | a | 51.38 | b | 52.87 | 66.39 | 70.80 | j | 80.26 | 78.53 | 69.89 | k | 57.93 | h | 51.43 | 44.02 | 57.65 | c | |||||||
1942 | 43.10 | a | 42.62 | 49.73 | 58.30 | c | 64.63 | 74.35 | 83.69 | 80.32 | 74.00 | a | 62.76 | 53.73 | 45.66 | 61.07 | ||||||||||
1943 | 43.94 | 49.62 | 54.82 | 61.92 | 68.63 | 74.37 | 82.00 | 79.42 | a | 73.41 | g | 61.90 | 51.38 | 45.90 | 61.26 | a | ||||||||||
1944 | 43.95 | 44.24 | 49.30 | a | 55.19 | a | 65.34 | 70.35 | 78.94 | 81.03 | 74.70 | b | 65.16 | 49.79 | i | 42.69 | 60.99 | a | ||||||||
1945 | 42.58 | 47.50 | 47.95 | 57.05 | 65.47 | 71.81 | a | 82.94 | 82.13 | 73.65 | 63.52 | 48.48 | 39.83 | j | 62.10 | a | ||||||||||
1946 | 41.11 | 43.12 | 51.13 | 62.18 | 64.68 | 74.87 | 79.89 | d | 78.61 | 72.97 | 57.24 | 45.58 | 44.92 | 59.69 | ||||||||||||
1947 | 39.90 | 49.82 | 53.66 | 59.98 | a | 69.76 | 74.10 | 82.28 | b | 79.69 | 76.97 | 63.24 | 46.75 | 40.33 | a | 61.37 | ||||||||||
1948 | 42.77 | 43.76 | 46.29 | c | 60.43 | 67.29 | 74.78 | 81.36 | b | 80.93 | a | 75.32 | 63.38 | a | 44.96 | b | 42.32 | 60.30 | ||||||||
1949 | 34.44 | 40.57 | 50.78 | a | 58.16 | h | 66.02 | b | 75.20 | 81.77 | 79.86 | i | 76.07 | 57.24 | h | 53.53 | 40.24 | 57.62 | c | |||||||
1950 | 39.26 | b | 48.20 | 51.50 | 60.47 | 63.73 | 74.30 | 79.45 | 77.81 | g | 70.30 | 66.56 | 52.39 | b | 47.69 | o | 60.62 | b | ||||||||
1951 | 45.07 | j | 46.04 | a | 51.36 | b | 58.27 | b | 66.93 | d | 70.20 | b | 83.83 | a | 78.40 | a | 73.69 | a | 61.50 | 49.91 | a | 41.25 | a | 61.94 | a | |
1952 | 42.16 | 45.02 | a | 46.47 | b | 59.41 | a | 68.41 | b | 75.09 | b | 80.44 | 81.38 | c | 76.46 | f | 66.41 | c | 46.95 | b | 41.97 | m | 61.17 | b | ||
1953 | 47.18 | c | 45.14 | c | 53.10 | a | 58.41 | b | 62.26 | d | 75.62 | a | 81.95 | a | 78.35 | 74.47 | a | 61.34 | b | 52.61 | b | 39.93 | d | 60.86 | ||
1954 | 43.17 | b | 51.88 | b | 50.78 | b | 63.15 | 69.08 | 76.30 | h | 82.35 | h | 77.63 | a | 74.55 | a | 64.45 | 54.13 | c | 43.27 | k | 60.98 | c | |||
1955 | 39.98 | a | 41.78 | a | 51.11 | h | 57.10 | 66.07 | a | 74.28 | a | 78.68 | 79.73 | 74.21 | a | 65.82 | 50.65 | 45.77 | a | 61.28 | a | |||||
1956 | 46.31 | 42.47 | 53.94 | 58.45 | b | 69.26 | 79.12 | d | 82.12 | e | 78.11 | 78.31 | d | 61.73 | a | 45.59 | c | 41.58 | a | 61.41 | ||||||
1957 | 46.17 | j | 53.05 | 53.24 | 57.22 | a | 61.62 | f | 79.13 | k | 82.23 | a | 79.23 | 73.96 | c | 61.13 | a | 47.65 | c | 44.04 | d | 61.31 | c | |||
1958 | 42.60 | 49.00 | 47.84 | 56.55 | b | 71.37 | 77.38 | a | 82.89 | 83.03 | a | 73.82 | 63.97 | 51.20 | b | 45.33 | b | 62.08 | ||||||||
1959 | 44.09 | b | 45.50 | b | 53.05 | 63.06 | c | 66.00 | 79.40 | 84.06 | 78.82 | 74.25 | 65.53 | a | 50.80 | 45.42 | 62.50 | |||||||||
1960 | 38.19 | 42.35 | c | 56.10 | 60.86 | a | 68.18 | 79.18 | 83.56 | 82.03 | 76.38 | 60.89 | 50.77 | 42.10 | 61.72 | |||||||||||
1961 | 44.47 | 48.73 | 52.39 | 60.93 | a | 67.50 | 79.53 | 83.76 | 81.24 | 71.57 | 61.65 | 48.00 | a | 41.66 | 61.79 | |||||||||||
1962 | 42.34 | 48.50 | 47.39 | 64.12 | 65.58 | 74.82 | 81.40 | 81.92 | 75.23 | 64.68 | 54.70 | 46.40 | 62.26 | |||||||||||||
1963 | 40.10 | 51.77 | 52.38 | a | 57.50 | 69.86 | b | 73.47 | 84.90 | 80.12 | a | 75.82 | 66.71 | 52.69 | a | 42.17 | b | 62.29 | ||||||||
1964 | 39.17 | a | 41.64 | 48.45 | 57.37 | 66.47 | 74.32 | 83.87 | 79.08 | 73.57 | 67.87 | 47.32 | 42.23 | 60.11 | ||||||||||||
1965 | 45.76 | 46.32 | 49.05 | 56.18 | 62.89 | 69.53 | 81.82 | 79.84 | 69.97 | 64.97 | 54.32 | 43.89 | 60.38 | |||||||||||||
1966 | 39.66 | 42.12 | 53.56 | 61.20 | 69.37 | 75.58 | 82.61 | 80.92 | 75.05 | 61.92 | 52.90 | 42.92 | 61.49 | |||||||||||||
1967 | 43.06 | 48.45 | 55.39 | 55.95 | 66.05 | 72.73 | 82.84 | 80.48 | 73.98 | 63.95 | a | 53.93 | 35.06 | 60.99 | ||||||||||||
1968 | 39.35 | 51.50 | 52.69 | 55.72 | 65.71 | 75.78 | 79.81 | 76.11 | 72.67 | 62.58 | 50.35 | 38.92 | 60.10 | |||||||||||||
1969 | 47.31 | 45.25 | 48.02 | 59.75 | 68.06 | 74.15 | 82.60 | a | 83.90 | 74.87 | 59.40 | 50.67 | 44.76 | 61.56 | ||||||||||||
1970 | 40.92 | 49.18 | 50.26 | 53.97 | 67.66 | 76.17 | a | 83.53 | 82.61 | 70.38 | 58.03 | 50.82 | 41.42 | 60.41 | ||||||||||||
1971 | 42.19 | 45.59 | 53.67 | a | 56.15 | 63.13 | 74.70 | 82.98 | 80.08 | 73.27 | 56.76 | 49.57 | 39.98 | 59.84 | ||||||||||||
1972 | 42.31 | 48.72 | 59.48 | 60.70 | 67.61 | 76.13 | 83.85 | 80.16 | 72.68 | 62.19 | 47.20 | 41.11 | 61.85 | |||||||||||||
1973 | 41.29 | 46.77 | 46.21 | 53.87 | 67.40 | 75.57 | 81.53 | 79.92 | 71.74 | a | 61.71 | 49.60 | 42.88 | a | 59.87 | |||||||||||
1974 | 41.69 | 43.65 | a | 54.31 | 57.45 | a | 68.30 | a | 79.66 | a | 81.40 | 79.15 | a | 73.53 | a | 63.39 | 49.37 | 39.31 | 60.93 | |||||||
1975 | 40.42 | a | 44.71 | 48.17 | a | 51.53 | a | 64.15 | 73.75 | 82.79 | 80.02 | 74.42 | 61.53 | 50.00 | 44.26 | 59.65 | ||||||||||
1976 | 43.53 | 49.13 | c | 51.05 | 57.38 | 68.31 | 75.13 | 81.75 | a | 78.42 | a | 72.22 | 60.58 | 51.35 | 42.37 | 60.94 | ||||||||||
1977 | 41.53 | a | 48.38 | 48.83 | d | 61.13 | 63.42 | 78.16 | a | 83.73 | a | 81.71 | 75.40 | 64.63 | 52.62 | a | 47.40 | 62.25 | ||||||||
1978 | 45.87 | 47.83 | a | 55.90 | 57.93 | 65.96 | c | 77.81 | a | 83.73 | 80.11 | c | 74.62 | 66.95 | a | 51.67 | 40.53 | 62.41 | ||||||||
1979 | 38.80 | a | 45.46 | b | 50.71 | 58.85 | 65.66 | 75.69 | a | 82.21 | 77.96 | e | 76.57 | 64.44 | 47.48 | 44.31 | 60.68 | |||||||||
1980 | 46.08 | 49.46 | a | 50.89 | 58.40 | 63.24 | 75.32 | 84.56 | 80.73 | 74.41 | a | 62.59 | b | 51.21 | a | 48.66 | 62.13 | |||||||||
1981 | 47.21 | 48.96 | 51.26 | 62.79 | a | 67.71 | 80.53 | 84.18 | c | 81.20 | c | 73.74 | a | 59.71 | 52.35 | 45.24 | 62.91 | |||||||||
1982 | 42.93 | d | 48.35 | d | 51.34 | c | 58.47 | a | 66.98 | a | 72.86 | a | 81.40 | a | 81.45 | a | 74.27 | 58.97 | b | 49.57 | g | 42.32 | c | 61.76 | a | |
1983 | 42.90 | f | 47.33 | e | 51.21 | e | 53.24 | g | 66.16 | b | 73.75 | b | 82.09 | b | 80.12 | c | 76.77 | d | 63.10 | e | 50.83 | d | 45.41 | c | 63.68 | b |
1984 | 45.14 | f | 44.98 | d | 53.36 | b | 58.43 | g | 72.28 | a | 74.23 | d | 82.12 | e | 79.69 | e | 75.38 | d | 58.42 | e | 49.50 | d | 42.78 | f | 65.55 | c |
1985 | 42.62 | c | 43.83 | d | 52.39 | m | 62.88 | f | 68.31 | b | 78.72 | 83.72 | f | 81.32 | f | 68.64 | e | 63.78 | b | 50.55 | b | 45.54 | e | 57.75 | d | |
1986 | 48.95 | c | 50.73 | f | 56.87 | d | 60.41 | c | 67.37 | a | 76.88 | a | 78.60 | a | 80.68 | 69.81 | a | 59.87 | a | 51.22 | 43.11 | c | 63.07 | a | ||
1987 | 41.42 | a | 46.33 | a | 49.03 | 62.75 | 67.25 | a | 77.50 | a | 78.95 | 79.41 | c | 72.85 | c | 65.95 | b | 49.81 | a | 40.85 | e | 61.01 | ||||
1988 | 41.91 | b | 48.85 | b | 52.34 | 59.59 | a | 66.73 | a | 77.43 | b | 82.52 | a | 79.47 | a | 71.57 | 68.03 | a | 51.93 | a | 42.50 | a | 61.91 | |||
1989 | 41.82 | a | 48.41 | a | 57.24 | b | 65.87 | 69.73 | 76.82 | 83.94 | 79.37 | 74.80 | 63.13 | 52.75 | 42.23 | 63.01 | ||||||||||
1990 | 42.87 | a | 45.74 | e | 55.06 | e | 61.69 | f | 65.27 | c | 78.16 | a | 81.00 | a | 77.87 | a | 75.92 | 63.09 | h | 51.08 | 38.62 | c | 61.16 | b | ||
1991 | 42.07 | b | 50.96 | a | 48.38 | b | 58.12 | 65.12 | c | 72.66 | b | 82.82 | 81.24 | b | 74.75 | 65.45 | 50.13 | c | 43.40 | b | 61.26 | |||||
1992 | 42.47 | 49.55 | 52.76 | 63.18 | 68.47 | a | 73.62 | 79.92 | 80.05 | c | 73.82 | 64.15 | 46.93 | 39.87 | 61.23 | |||||||||||
1993 | 45.10 | a | 46.82 | 55.34 | b | 61.07 | a | 69.32 | 74.70 | 79.95 | 79.17 | a | 72.87 | 62.02 | a | 47.36 | a | 41.35 | e | 61.26 | ||||||
1994 | 43.72 | a | 43.91 | a | 54.84 | 60.55 | a | 66.55 | 79.02 | 83.38 | a | 83.73 | 74.87 | 60.66 | 46.87 | c | 45.28 | d | 61.95 | |||||||
1995 | 43.82 | 52.13 | b | 53.55 | 56.57 | 63.74 | 73.12 | 81.25 | a | 83.73 | 75.85 | 63.03 | a | 54.74 | e | 48.24 | n | 63.78 | a | |||||||
1996 | 43.80 | f | 52.48 | 54.24 | 61.77 | 70.44 | 78.24 | a | 84.42 | 82.77 | 71.78 | 62.38 | a | 51.62 | a | 44.60 | a | 64.98 | a | |||||||
1997 | 43.29 | 47.04 | a | 56.89 | 58.10 | 71.74 | 73.62 | a | 80.92 | a | 80.13 | a | 74.70 | c | 60.06 | 50.62 | a | 39.53 | b | 61.39 | ||||||
1998 | 44.24 | 42.67 | a | 50.87 | 53.27 | 63.42 | 71.16 | a | 82.38 | b | 81.78 | a | 73.57 | 60.58 | 50.03 | a | 42.91 | b | 59.74 | |||||||
1999 | 44.50 | 49.11 | a | 54.60 | a | 55.83 | c | 66.55 | a | 75.10 | a | 79.00 | a | 80.15 | a | 72.11 | g | 62.95 | 53.80 | b | 41.92 | a | 60.32 | a | ||
2000 | 45.10 | e | 49.50 | d | 52.02 | 63.08 | 70.81 | b | 78.61 | b | 82.53 | 78.75 | a | 75.42 | 60.88 | a | 43.62 | d | 43.23 | e | 61.96 | |||||
2001 | 41.12 | f | 44.80 | h | 55.35 | e | 59.79 | a | 72.65 | 78.53 | 82.97 | a | 81.15 | 77.23 | 66.38 | a | 55.55 | h | 39.80 | k | 71.76 | d | ||||
2002 | 43.11 | h | 49.02 | h | 52.44 | e | 64.50 | b | 69.47 | 79.83 | a | 86.13 | a | 82.89 | 75.37 | 62.25 | a | 51.82 | b | 41.69 | g | 69.41 | c | |||
2003 | 49.39 | d | 47.18 | i | 54.31 | e | 58.45 | b | 70.00 | b | 77.88 | 87.27 | 83.66 | 76.79 | a | 68.87 | a | 50.18 | e | 42.66 | i | 67.68 | b | |||
2004 | 43.75 | m | 45.06 | c | 60.98 | f | 59.74 | g | 69.83 | a | 77.23 | 82.55 | 80.13 | 74.12 | a | ----- | z | 48.80 | e | 44.23 | g | 68.25 | e | |||
2005 | 46.98 | h | 49.37 | e | 53.19 | e | 59.11 | c | 70.42 | 75.80 | 84.95 | i | 81.31 | w | 73.77 | b | 64.34 | 51.81 | d | 43.50 | f | 62.23 | d | |||
2006 | 43.81 | j | 48.08 | d | 50.86 | c | 62.30 | e | 72.24 | 81.75 | 84.97 | b | 80.38 | a | 71.41 | a | 61.78 | a | 52.98 | d | 40.88 | g | 66.68 | b | ||
2007 | 40.24 | l | 47.76 | g | 57.43 | c | 62.81 | d | 70.87 | 78.77 | b | 84.65 | 79.16 | i | 74.25 | h | 63.97 | 56.38 | e | 40.72 | b | 64.45 | d | |||
2008 | 41.91 | c | 47.78 | f | 54.84 | b | 59.77 | f | 66.37 | e | 78.02 | a | 83.63 | a | 82.43 | d | 75.31 | c | 64.38 | f | 53.95 | j | 44.08 | f | 68.93 | e |
2009 | 46.31 | d | 48.37 | b | 54.16 | f | 59.55 | i | 72.35 | 73.65 | d | 84.87 | a | 81.76 | f | 76.11 | c | 61.19 | d | 53.37 | 41.70 | a | 61.99 | c | ||
2010 | 44.73 | 47.75 | 52.90 | 58.52 | 65.65 | 76.47 | a | 84.13 | 81.45 | 76.32 | 64.63 | a | 49.20 | 47.47 | 62.43 | |||||||||||
2011 | 43.52 | 44.21 | 55.02 | 61.78 | 65.16 | 75.07 | a | 82.72 | b | 84.14 | b | 75.38 | 63.02 | a | 48.62 | a | 40.55 | a | 61.60 | |||||||
2012 | 43.61 | 45.88 | 52.70 | a | 61.92 | 69.35 | a | 78.78 | 82.31 | 82.79 | 74.83 | 63.32 | 52.85 | 41.87 | a | 62.52 | ||||||||||
2013 | 39.37 | 43.39 | 55.69 | 60.85 | 68.26 | 79.83 | 82.66 | 80.45 | 73.09 | a | 58.02 | 51.53 | a | 41.05 | b | 61.18 | ||||||||||
2014 | 45.08 | 49.88 | 55.26 | 60.05 | a | 67.74 | 76.88 | a | 83.11 | 78.22 | b | 75.97 | 65.23 | 51.83 | d | 44.59 | c | 62.82 | ||||||||
2015 | 44.42 | 52.11 | 56.47 | a | 59.85 | d | 64.65 | 80.25 | 80.95 | b | 83.11 | c | 76.98 | c | 66.24 | 48.07 | 40.08 | a | 62.76 | |||||||
2016 | 42.32 | 50.95 | 55.92 | 60.03 | 66.05 | 80.83 | a | 83.04 | f | 78.71 | e | 73.53 | 65.95 | 53.31 | a | 43.79 | 61.04 | a | ||||||||
2017 | 43.53 | b | 50.23 | f | 57.31 | 60.70 | 67.16 | 79.78 | 83.48 | 79.79 | 71.83 | a | 63.98 | 55.98 | 44.34 | 64.35 | a | |||||||||
2018 | 47.05 | c | 47.00 | b | 53.58 | 64.53 | k | 69.90 | b | 78.07 | b | 84.59 | c | 81.69 | 76.71 | b | 61.61 | 48.62 | 43.63 | l | 64.88 | b | ||||
2019 | 48.42 | y | 42.59 | 53.85 | a | 61.97 | 61.92 | a | 75.47 | 83.47 | 82.41 | c | 75.32 | 60.48 | 51.87 | c | 42.86 | b | 62.93 | a | ||||||
2020 | 43.60 | b | 46.34 | 52.20 | f | 60.11 | c | 71.72 | f | 76.57 | a | 83.65 | 84.61 | 75.57 | 65.63 | 52.98 | 40.89 | 63.00 | b | |||||||
2021 | 41.50 | 46.61 | 49.92 | 63.47 | 68.34 | 81.00 | b | 83.95 | 79.53 | a | 76.93 | 60.48 | a | 54.70 | 45.02 | a | 62.62 | |||||||||
2022 | 42.92 | 44.95 | 52.84 | 62.10 | 69.14 | j | 78.52 | e | 85.39 | c | 81.42 | a | 78.41 | a | 62.55 | a | 46.40 | a | 42.73 | a | 61.66 | a | ||||
2023 | 41.91 | b | 44.10 | b | 48.57 | a | 59.21 | a | 68.18 | a | 72.65 | d | 86.08 | 82.39 | 73.41 | a | 64.52 | 52.94 | c | 44.41 | c | 61.53 | ||||
2024 | 40.74 | f | 47.60 | 50.48 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.60 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 42.99 | 46.88 | 52.50 | 59.48 | 67.38 | 76.18 | 82.58 | 80.59 | 74.29 | 62.93 | 50.63 | 42.86 | 61.45 | |||||||||||||
S.D. | 2.57 | 3.05 | 2.95 | 2.90 | 2.52 | 2.71 | 1.79 | 1.73 | 1.93 | 2.55 | 2.67 | 2.41 | 0.95 | |||||||||||||
SKEW | -0.17 | -0.14 | -0.18 | -0.42 | 0.02 | -0.14 | -0.23 | 0.18 | -0.50 | -0.09 | -0.31 | -0.21 | -0.25 | |||||||||||||
MAX | 49.39 | 53.05 | 59.48 | 65.87 | 72.65 | 81.75 | 87.27 | 84.61 | 78.41 | 68.87 | 56.38 | 48.66 | 63.01 | |||||||||||||
MIN | 34.44 | 39.73 | 46.21 | 51.53 | 61.92 | 69.53 | 78.60 | 76.11 | 68.64 | 56.76 | 43.62 | 35.06 | 59.65 | |||||||||||||
YRS | 73 | 79 | 80 | 76 | 82 | 82 | 81 | 79 | 80 | 80 | 82 | 71 | 49 |