YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | 39.23 | i | 38.45 | 56.05 | j | 57.88 | 68.15 | n | 82.04 | r | 79.93 | p | 80.26 | 79.34 | b | 65.16 | b | 50.87 | 44.35 | 59.47 | e | |||||
1940 | 37.68 | 44.11 | a | 51.30 | a | 58.14 | a | 68.05 | 75.43 | a | 79.34 | b | 77.48 | 71.87 | 59.29 | 43.58 | 43.43 | b | 59.14 | |||||||
1941 | 41.74 | 48.00 | a | 49.76 | 55.41 | a | 68.79 | 74.47 | 78.81 | 77.10 | 72.21 | a | 59.94 | 47.58 | 42.10 | 59.66 | ||||||||||
1942 | 40.68 | 42.88 | 47.73 | a | 57.50 | 65.40 | 75.33 | 79.95 | 76.35 | 68.72 | a | 58.74 | 50.58 | e | ----- | z | 60.35 | a | ||||||||
1943 | 43.69 | j | 48.17 | b | 52.03 | a | 63.20 | 69.95 | 77.67 | 79.85 | 82.42 | 71.35 | 56.97 | 44.36 | b | 38.92 | 62.26 | a | ||||||||
1944 | 36.44 | 43.87 | b | 46.94 | 56.22 | 65.82 | a | 76.03 | 80.38 | a | 78.60 | 70.55 | 59.94 | 45.79 | a | 37.72 | a | 58.19 | ||||||||
1945 | 40.27 | 46.22 | a | 50.40 | 58.12 | b | 69.08 | 75.00 | 80.11 | 81.02 | 74.07 | a | 60.47 | a | 47.72 | 38.60 | 60.09 | |||||||||
1946 | 37.98 | 43.14 | 50.93 | a | 63.97 | 67.27 | 78.62 | 78.84 | 78.27 | 73.32 | 61.12 | a | 43.09 | a | 39.65 | 59.68 | ||||||||||
1947 | 35.63 | 41.95 | 49.26 | 56.64 | b | 70.39 | 76.15 | 80.73 | 77.89 | 71.92 | ----- | z | ----- | z | 36.21 | e | 59.68 | b | ||||||||
1948 | 33.76 | h | 44.52 | 47.94 | 61.67 | 69.92 | 78.47 | 81.84 | 79.94 | 71.87 | 58.73 | a | 41.52 | 42.32 | 61.70 | a | ||||||||||
1949 | 36.07 | a | 42.62 | 51.73 | 57.20 | 67.68 | 77.43 | 80.44 | 77.40 | 72.40 | 58.58 | a | 48.45 | 38.24 | 59.02 | |||||||||||
1950 | 42.93 | b | 46.63 | b | 51.92 | 60.32 | 66.44 | 79.20 | 78.74 | 77.23 | 71.15 | 64.98 | 47.98 | 41.29 | 60.73 | |||||||||||
1951 | 39.90 | 42.62 | 54.79 | s | 65.74 | a | 73.10 | 74.43 | o | 85.71 | 81.31 | 74.41 | a | 63.45 | 44.78 | c | 42.44 | 61.35 | b | |||||||
1952 | 45.66 | 42.12 | 46.03 | 58.02 | a | 68.68 | c | 81.19 | d | 80.54 | c | 81.85 | d | 70.88 | q | 59.61 | i | 47.30 | g | 38.44 | 60.28 | c | ||||
1953 | 43.67 | g | 40.86 | f | 53.07 | h | 58.98 | d | 63.42 | a | 80.64 | e | 82.36 | b | 80.34 | 72.78 | a | 59.24 | 47.59 | c | 33.58 | a | 64.33 | c | ||
1954 | 41.05 | 47.38 | 51.18 | a | 63.75 | 69.70 | a | 76.88 | f | 82.93 | a | 79.11 | 75.48 | 62.72 | a | 48.07 | 39.74 | 60.10 | a | |||||||
1955 | 36.21 | 39.43 | a | 52.52 | 59.55 | a | 67.52 | 76.38 | a | 78.10 | 78.13 | a | 73.54 | q | 58.66 | l | 48.48 | 41.60 | 57.79 | b | ||||||
1956 | 42.55 | 40.43 | 51.60 | 55.58 | 68.73 | 77.73 | 77.18 | 76.02 | 72.07 | a | 61.75 | a | 42.17 | 36.40 | 58.52 | |||||||||||
1957 | 45.47 | 52.91 | 50.94 | 57.83 | 64.58 | 75.34 | a | 80.34 | b | 77.62 | a | 69.38 | 57.42 | 44.59 | a | 40.35 | 59.73 | |||||||||
1958 | 37.60 | 46.48 | 47.61 | 57.87 | 69.39 | 79.57 | b | 81.47 | a | 81.13 | l | 70.48 | h | 59.53 | 48.42 | 40.60 | 56.85 | b | ||||||||
1959 | 40.63 | a | 44.50 | 49.26 | 61.00 | a | 68.05 | a | 79.08 | 81.19 | 79.13 | 73.12 | 60.84 | 44.15 | 40.03 | 60.08 | ||||||||||
1960 | 36.08 | 40.00 | a | 52.84 | 60.43 | 67.26 | 79.43 | 77.95 | 79.74 | 72.83 | 58.66 | 47.70 | 32.00 | 58.74 | ||||||||||||
1961 | 37.56 | 44.98 | 51.94 | 59.68 | 70.00 | 77.28 | 81.25 | a | 78.15 | 70.43 | a | 59.69 | b | 45.58 | 42.22 | a | 59.90 | |||||||||
1962 | 36.77 | 49.00 | 45.98 | 61.98 | 68.37 | a | 75.57 | 77.55 | 78.68 | 71.47 | 60.35 | a | 48.75 | b | 41.39 | 59.65 | ||||||||||
1963 | 35.82 | 44.89 | 51.47 | 62.50 | 71.14 | b | 78.29 | b | 82.73 | 77.50 | e | 73.03 | 62.69 | 52.73 | o | 36.02 | c | 61.46 | a | |||||||
1964 | 33.24 | 34.48 | d | 47.25 | m | 57.32 | e | 69.32 | c | 77.60 | d | 81.93 | a | 79.33 | b | 73.03 | a | 60.46 | d | 47.87 | 39.37 | a | 59.45 | a | ||
1965 | 41.48 | 41.59 | 47.76 | 60.25 | 67.71 | 74.82 | 81.71 | 77.87 | 71.15 | 59.02 | c | 51.77 | 42.35 | 59.79 | ||||||||||||
1966 | 35.52 | 38.54 | b | 51.60 | 60.38 | 70.34 | 76.22 | 82.63 | 76.78 | a | 71.20 | 58.58 | 50.95 | 38.73 | 59.29 | |||||||||||
1967 | 37.13 | 44.93 | 55.85 | 62.75 | 65.48 | 75.77 | b | 81.10 | 76.19 | 70.15 | 60.17 | a | 48.97 | 38.58 | 59.76 | |||||||||||
1968 | 39.61 | 46.67 | e | 51.05 | 57.36 | a | 68.62 | c | 78.03 | 78.82 | 76.62 | a | 70.26 | a | 61.37 | a | 47.38 | 37.68 | 59.46 | |||||||
1969 | 45.24 | 43.61 | 46.65 | a | 61.50 | 68.32 | 77.25 | 81.85 | 80.15 | 71.07 | 61.92 | 46.30 | 42.16 | 60.50 | ||||||||||||
1970 | 39.52 | 46.21 | 49.32 | 56.50 | a | 67.77 | a | 75.93 | 80.48 | 78.56 | 72.09 | b | 55.71 | b | 47.04 | c | 42.97 | 59.34 | ||||||||
1971 | 40.27 | 42.52 | 50.03 | b | 57.00 | b | 66.82 | a | 77.29 | a | 81.26 | 75.42 | a | 71.73 | 59.58 | a | 47.50 | 40.74 | 59.18 | |||||||
1972 | 41.52 | 45.40 | c | 55.61 | 59.77 | 67.05 | 75.90 | 81.20 | a | 76.03 | 70.43 | a | 63.18 | 43.37 | 41.38 | a | 60.07 | |||||||||
1973 | 38.76 | 44.22 | a | 49.86 | b | 55.19 | a | 66.31 | 74.97 | a | 79.84 | 77.47 | 72.60 | 59.44 | 50.33 | 38.76 | 58.98 | |||||||||
1974 | 42.16 | 40.27 | 55.40 | 59.12 | 72.02 | a | 79.80 | 78.66 | 74.94 | 70.07 | 61.35 | a | 46.78 | 36.25 | c | 59.73 | ||||||||||
1975 | 40.25 | a | 44.79 | 50.09 | b | 55.33 | 64.60 | 76.46 | c | 77.40 | 77.33 | a | 69.28 | 59.09 | c | 45.03 | a | 38.56 | 58.19 | |||||||
1976 | 37.42 | e | 47.76 | 50.85 | 59.80 | 66.39 | 77.70 | 79.03 | n | 77.88 | f | 70.24 | a | 54.95 | a | 40.90 | a | 35.76 | 54.18 | b | ||||||
1977 | 38.95 | 43.50 | 46.79 | 59.07 | 67.77 | 78.19 | a | 80.05 | 81.02 | 75.10 | 61.53 | 49.65 | 43.90 | 60.46 | ||||||||||||
1978 | 41.17 | a | 44.00 | 53.40 | 61.25 | 68.16 | 79.77 | 83.10 | 77.77 | a | 70.21 | a | 61.38 | b | 51.45 | 39.19 | 60.90 | |||||||||
1979 | 38.23 | 44.62 | 49.65 | 58.67 | 67.02 | a | 75.28 | 80.98 | 74.55 | 69.19 | a | 59.39 | 41.08 | j | 38.72 | b | 59.66 | a | ||||||||
1980 | 43.98 | a | 46.11 | a | 49.48 | 57.03 | 66.37 | a | 80.68 | 82.55 | 77.26 | 71.25 | 55.89 | 45.25 | 41.92 | 59.81 | ||||||||||
1981 | 42.05 | 45.25 | 49.68 | 62.93 | a | 68.34 | 80.05 | b | 81.47 | a | 75.98 | 70.17 | 60.27 | 48.57 | a | 43.31 | 60.67 | |||||||||
1982 | 42.28 | b | 45.52 | 52.35 | a | 61.64 | a | 66.07 | a | 78.41 | b | 80.52 | 78.44 | 71.03 | a | 58.20 | a | 46.66 | b | 38.47 | 59.96 | |||||
1983 | 38.00 | 44.48 | 51.24 | d | 53.48 | a | 64.37 | 73.93 | 79.55 | 77.68 | 73.60 | 60.45 | 49.08 | 39.95 | 58.82 | |||||||||||
1984 | 38.73 | 40.17 | 50.50 | 57.60 | 70.92 | 76.00 | 79.61 | 75.10 | 71.02 | 55.22 | a | 46.15 | 42.19 | b | 58.60 | |||||||||||
1985 | 38.26 | 43.89 | 52.27 | 62.08 | 69.05 | 78.08 | 79.40 | 78.18 | 71.43 | 59.68 | 50.95 | 39.06 | 60.20 | |||||||||||||
1986 | 41.39 | 49.28 | a | 52.69 | 63.17 | a | 68.68 | 76.73 | 78.89 | 79.32 | 71.67 | 58.63 | 46.52 | 39.67 | a | 60.55 | ||||||||||
1987 | 38.32 | 43.70 | 48.00 | b | 56.93 | 66.81 | 75.25 | 80.15 | 77.00 | 69.27 | 63.31 | 46.75 | 35.88 | a | 58.45 | |||||||||||
1988 | 39.31 | 46.91 | 51.45 | 59.12 | 67.58 | 76.30 | 78.71 | 76.18 | 68.88 | 62.18 | 49.35 | 38.03 | 59.50 | |||||||||||||
1989 | 38.98 | 47.02 | 54.42 | 63.88 | a | 69.73 | e | 77.18 | 80.02 | 77.50 | d | 71.13 | 60.11 | 47.17 | 35.92 | 60.26 | ||||||||||
1990 | 39.12 | c | 43.23 | 52.07 | a | 62.38 | a | 68.93 | b | 83.24 | a | 78.35 | a | 74.05 | a | 71.58 | 56.70 | c | 48.53 | a | 38.60 | b | 59.73 | |||
1991 | ----- | z | 45.41 | 48.67 | b | 59.57 | 68.68 | 75.67 | 77.26 | 76.37 | 68.48 | 61.45 | a | 43.45 | 38.95 | a | 60.36 | a | ||||||||
1992 | 36.74 | d | 43.53 | 50.87 | a | 60.37 | 66.67 | a | 73.48 | 78.84 | 77.37 | a | 72.43 | 61.35 | a | 42.34 | a | 39.13 | a | 58.59 | ||||||
1993 | 42.58 | a | 44.85 | a | 50.58 | a | 58.17 | a | 67.05 | a | 77.02 | 81.60 | a | 77.85 | 69.72 | 58.00 | a | 45.03 | 37.68 | c | 59.18 | |||||
1994 | 39.07 | b | 42.79 | b | 51.88 | b | 59.45 | a | 68.13 | 81.90 | a | 82.37 | a | 81.52 | 71.74 | a | 59.28 | a | 46.17 | c | 42.04 | f | 62.21 | a | ||
1995 | 40.36 | c | 48.87 | a | 53.66 | 55.43 | b | 67.55 | 76.85 | 79.16 | 80.66 | 71.38 | 60.37 | 49.83 | 43.65 | h | 62.19 | a | ||||||||
1996 | 40.48 | a | 49.53 | 48.83 | a | 59.13 | 73.00 | 79.88 | 80.61 | 77.16 | 69.18 | 60.10 | 47.85 | 39.02 | d | 60.40 | ||||||||||
1997 | 38.52 | c | 43.41 | a | 52.79 | 56.63 | 69.40 | b | 76.10 | a | 80.87 | 78.58 | 74.77 | 59.00 | 46.00 | 34.97 | b | 59.25 | ||||||||
1998 | 41.03 | a | 42.54 | c | 48.69 | b | 54.48 | 68.71 | 75.72 | 80.92 | a | 78.70 | a | 76.33 | 62.18 | a | 50.28 | 40.50 | a | 60.01 | ||||||
1999 | 42.13 | 45.68 | 52.89 | 57.33 | a | 68.78 | a | 75.13 | 80.21 | 78.60 | 71.78 | a | 58.97 | 49.76 | a | 36.87 | a | 59.84 | ||||||||
2000 | 42.28 | a | 46.70 | a | 50.36 | c | 61.93 | a | 73.95 | a | 77.98 | 81.45 | a | 78.50 | 73.70 | 60.08 | 42.37 | 38.63 | a | 60.66 | ||||||
2001 | 36.05 | a | 44.82 | 50.16 | 60.77 | 70.26 | 78.37 | 82.27 | 78.29 | 72.10 | 61.24 | 49.90 | 36.55 | b | 60.07 | |||||||||||
2002 | 40.31 | 41.24 | a | 50.63 | a | 64.25 | 69.98 | 81.95 | 80.21 | 80.87 | a | 73.28 | a | 59.21 | 45.37 | 39.43 | c | 60.56 | ||||||||
2003 | 42.95 | 45.27 | 50.74 | 58.87 | 70.53 | 77.07 | 83.48 | b | 80.24 | 73.03 | a | 63.16 | 49.45 | a | 37.63 | a | 61.04 | |||||||||
2004 | 40.08 | 39.17 | b | 54.24 | 59.05 | 70.27 | a | 77.47 | a | 79.31 | b | 76.29 | 70.39 | c | 60.90 | b | 45.76 | a | 38.50 | h | 61.17 | a | ||||
2005 | 43.60 | a | 46.18 | 50.39 | 58.72 | 69.40 | 78.45 | 82.84 | 78.13 | a | 74.72 | a | 60.79 | 49.17 | a | 41.17 | a | 61.13 | ||||||||
2006 | 40.72 | a | 45.39 | 53.08 | a | 63.05 | 71.66 | 80.35 | 82.00 | a | 76.37 | 67.33 | 58.37 | a | 49.93 | 37.79 | 60.50 | |||||||||
2007 | 37.27 | a | 45.00 | a | 52.24 | 59.36 | a | 67.74 | 77.25 | 79.65 | a | 81.00 | 74.31 | a | 61.68 | 49.70 | 41.02 | a | 60.52 | |||||||
2008 | 38.23 | a | 45.10 | 50.53 | 58.72 | 67.50 | 79.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.68 | f | |||||
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.08 | a | 79.23 | 69.25 | 59.65 | e | 47.86 | a | 37.77 | a | 62.64 | f | ||
2010 | 38.22 | a | 42.81 | a | 48.06 | 60.38 | 67.10 | 80.57 | 79.78 | b | 79.79 | 74.10 | 61.32 | a | 48.40 | d | 44.35 | a | 60.41 | |||||||
2011 | 37.16 | 44.46 | d | 55.47 | a | 62.40 | 66.89 | 80.88 | 83.57 | b | 82.66 | 74.47 | 60.02 | 46.91 | c | 34.89 | c | 60.81 | ||||||||
2012 | 41.97 | 43.64 | 51.18 | 63.52 | 68.92 | 80.08 | 81.00 | 80.58 | 71.52 | 61.26 | 49.70 | 39.00 | 61.03 | |||||||||||||
2013 | 34.37 | 39.89 | 51.44 | f | 60.48 | 69.11 | 81.97 | 79.63 | d | 79.40 | a | 71.95 | 57.22 | a | 47.68 | b | 39.06 | 60.07 | a | |||||||
2014 | 38.32 | 50.18 | f | 52.90 | 59.00 | 65.98 | c | 82.28 | a | 82.23 | 76.95 | 72.73 | b | 62.12 | a | 47.26 | a | 40.55 | i | 63.98 | b | |||||
2015 | 38.36 | j | 45.23 | h | 52.97 | p | 60.38 | v | 68.41 | i | 80.80 | h | 81.37 | h | 82.12 | b | 77.59 | m | 67.50 | s | 46.12 | f | 39.14 | b | 60.63 | j |
2016 | 37.19 | 45.47 | 54.55 | a | 59.60 | 66.70 | c | 79.98 | 84.17 | b | 76.96 | d | 73.41 | a | 65.66 | 51.90 | 42.11 | 61.48 | ||||||||
2017 | 44.12 | c | 49.77 | 56.77 | 61.93 | 68.48 | a | 79.55 | b | 81.35 | a | 77.52 | 73.67 | a | 62.98 | a | 54.58 | 40.34 | 62.59 | |||||||
2018 | 36.75 | a | 48.36 | 54.19 | e | 64.57 | a | 71.59 | b | 82.53 | 81.97 | b | 80.06 | 73.66 | a | 60.81 | 46.47 | 44.92 | y | 63.72 | a | |||||
2019 | 41.75 | y | 43.74 | a | 53.08 | 60.68 | b | 65.93 | a | 76.91 | b | 81.63 | 81.48 | g | 75.80 | 59.37 | 46.92 | 40.10 | a | 60.42 | b | |||||
2020 | 41.43 | b | 42.75 | e | 54.18 | ----- | z | 71.33 | e | 79.30 | o | 84.08 | a | ----- | z | 70.19 | c | 61.81 | 51.52 | b | 36.86 | b | 57.13 | c | ||
2021 | 37.37 | a | 43.77 | b | 50.25 | e | 60.30 | b | 70.32 | 80.00 | d | 79.07 | a | 78.27 | a | 73.67 | 60.67 | a | 49.68 | 44.93 | d | 60.69 | ||||
2022 | 38.03 | a | 40.56 | a | 48.22 | b | 61.63 | d | 71.62 | c | 79.31 | c | 84.00 | i | 79.78 | k | 72.13 | c | 58.59 | h | 44.19 | i | 42.32 | a | 56.73 | d |
2023 | 42.07 | a | 43.08 | c | 50.71 | b | 58.61 | b | 70.28 | b | 78.66 | a | 87.39 | c | 82.39 | d | 74.98 | b | 64.17 | b | 49.44 | c | 41.10 | b | 61.91 | |
2024 | 40.47 | 47.43 | a | 51.70 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.53 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.56 | 44.33 | 51.04 | 59.62 | 68.45 | 77.90 | 80.74 | 78.36 | 71.99 | 60.27 | 47.47 | 39.45 | 59.93 | |||||||||||||
S.D. | 2.65 | 2.96 | 2.36 | 2.61 | 2.06 | 2.23 | 1.87 | 1.94 | 2.05 | 2.14 | 2.69 | 2.58 | 0.91 | |||||||||||||
SKEW | 0.15 | -0.24 | 0.06 | 0.05 | 0.18 | 0.32 | 0.62 | 0.25 | 0.55 | -0.02 | -0.26 | -0.20 | 0.27 | |||||||||||||
MAX | 45.66 | 52.91 | 56.77 | 65.74 | 73.95 | 83.24 | 87.39 | 82.66 | 79.34 | 65.66 | 54.58 | 44.93 | 62.59 | |||||||||||||
MIN | 33.24 | 34.48 | 45.98 | 53.48 | 63.42 | 73.48 | 77.18 | 74.05 | 67.33 | 54.95 | 40.90 | 32.00 | 58.19 | |||||||||||||
YRS | 78 | 82 | 79 | 82 | 82 | 79 | 80 | 79 | 80 | 79 | 78 | 78 | 57 |