YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.14 | w | 55.26 | 43.88 | b | 39.55 | 46.23 | i | ||
1940 | 34.13 | 39.04 | a | 47.58 | 51.86 | a | 63.58 | a | 70.63 | 75.32 | c | 71.27 | a | 67.20 | 56.58 | a | 43.66 | h | 38.55 | b | 55.98 | a | ||||
1941 | 35.56 | 40.89 | 42.93 | a | 48.78 | c | 62.47 | 68.27 | d | 73.38 | g | 72.53 | b | 65.82 | e | 56.14 | f | 44.94 | e | 39.44 | g | 53.58 | c | |||
1942 | 37.75 | a | 34.84 | c | 40.79 | g | 53.39 | c | 61.56 | f | 71.48 | c | 74.82 | c | 71.83 | e | 64.58 | e | 55.96 | e | 46.95 | b | 39.76 | f | 56.84 | c |
1943 | 37.21 | c | 40.98 | h | 45.73 | e | 57.65 | c | 64.39 | d | 71.76 | c | 74.08 | a | 75.52 | i | 66.17 | f | 56.04 | d | 42.59 | c | 32.88 | b | 53.59 | c |
1944 | 30.95 | 39.88 | 42.65 | a | 50.75 | 60.40 | 71.02 | 74.98 | 73.66 | 66.15 | 58.36 | b | 42.67 | 36.02 | 53.96 | |||||||||||
1945 | 36.82 | 41.75 | 43.84 | 51.87 | 63.45 | 68.80 | 74.53 | 74.81 | 68.79 | a | 56.24 | 43.88 | 33.92 | a | 54.89 | |||||||||||
1946 | 34.21 | c | 38.79 | 45.98 | 59.43 | 60.55 | l | 74.25 | 74.66 | c | 74.13 | l | 70.18 | e | 55.87 | d | 42.00 | g | 42.30 | f | 56.67 | d | ||||
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.50 | x | 74.87 | d | 70.70 | c | 59.78 | f | 39.37 | g | 34.57 | b | 60.05 | i |
1948 | 32.84 | i | 38.08 | d | 41.46 | d | 57.25 | d | 65.32 | 71.83 | r | 77.42 | m | 75.28 | f | 69.50 | 56.88 | c | 39.69 | d | 38.56 | f | 52.60 | e | ||
1949 | 31.37 | 37.55 | 47.38 | e | 54.44 | e | 63.54 | c | 72.25 | 76.00 | c | 74.73 | c | 68.82 | 54.35 | 48.32 | b | 36.52 | c | 55.44 | ||||||
1950 | 39.03 | a | 43.27 | f | 47.39 | c | 56.41 | h | 63.12 | e | 74.54 | b | 73.82 | f | 73.08 | e | 65.60 | d | 63.40 | b | 46.87 | d | 40.55 | a | 57.06 | c |
1951 | 36.33 | e | 39.07 | 44.24 | f | 52.52 | 64.85 | 73.31 | f | 79.44 | f | 76.00 | b | 70.00 | i | 57.88 | c | 41.89 | c | 37.31 | b | 50.73 | d | |||
1952 | 40.83 | b | 38.96 | d | 42.65 | h | 54.53 | 63.12 | c | 75.82 | 76.79 | c | 76.52 | e | 68.91 | b | 58.73 | 41.30 | e | 34.68 | a | 57.29 | a | |||
1953 | 40.65 | 36.07 | 47.32 | f | 53.92 | f | 60.87 | e | 73.52 | c | 77.06 | f | 73.90 | a | 67.93 | 55.31 | 43.88 | a | 29.60 | e | 53.52 | c | ||||
1954 | 36.66 | c | 42.76 | a | 46.14 | f | 57.87 | c | 62.94 | 72.84 | a | 78.29 | 73.05 | a | 69.97 | 58.48 | g | 45.94 | c | 36.53 | 57.69 | b | ||||
1955 | 33.34 | c | 34.45 | 45.85 | a | 53.34 | a | 61.48 | b | 69.94 | d | 73.68 | ----- | z | 70.65 | d | 59.93 | b | 45.16 | a | 40.10 | a | 53.45 | a | ||
1956 | 40.64 | b | 34.46 | b | 46.91 | c | 52.15 | c | 66.35 | a | 76.21 | a | 75.91 | c | 73.67 | a | 71.15 | 59.10 | a | 40.57 | b | 36.56 | d | 56.14 | ||
1957 | 41.45 | b | 48.62 | b | 46.63 | e | 54.37 | 61.45 | b | 73.60 | a | 77.77 | a | 73.42 | 66.71 | b | 53.62 | b | 40.45 | a | ----- | z | 58.01 | a | ||
1958 | ----- | z | 43.07 | u | 41.87 | a | 53.48 | 66.24 | b | 76.47 | a | 77.21 | 76.42 | a | 66.80 | c | 55.24 | 45.03 | a | 39.78 | b | 59.85 | b | |||
1959 | 36.92 | a | 38.80 | 45.05 | c | 56.57 | a | 63.59 | b | 75.35 | 76.12 | a | 73.83 | a | 67.50 | b | 56.61 | 41.88 | b | 38.20 | a | 55.87 | ||||
1960 | 32.42 | 34.64 | 48.42 | a | 55.37 | 61.65 | 74.48 | 74.35 | a | 75.76 | 69.47 | a | 55.61 | 46.50 | a | 32.57 | a | 55.10 | ||||||||
1961 | 33.61 | 40.63 | a | 47.03 | 54.47 | 65.02 | a | 74.50 | 76.31 | 74.10 | 65.23 | 56.71 | 42.03 | 36.69 | 55.53 | |||||||||||
1962 | 33.42 | 44.21 | 41.83 | a | 57.57 | a | 63.50 | 70.88 | d | 73.95 | 75.43 | a | 67.82 | 57.18 | a | 48.19 | a | 39.35 | 56.11 | |||||||
1963 | 32.77 | 43.34 | c | 47.05 | a | 56.48 | a | 66.17 | a | 71.80 | 78.00 | 73.15 | 70.26 | a | 61.26 | 46.17 | d | 35.88 | b | 56.86 | ||||||
1964 | 31.47 | a | 31.59 | a | 42.93 | d | 53.54 | c | 64.39 | 71.92 | 78.03 | a | 74.88 | e | 68.33 | 59.37 | a | 45.25 | 36.87 | 54.88 | ||||||
1965 | 39.40 | 38.11 | 42.65 | a | 54.86 | a | 62.75 | c | 71.02 | 77.37 | 74.31 | 66.70 | 57.18 | a | 49.36 | a | 38.74 | 56.04 | ||||||||
1966 | 32.00 | 33.98 | 47.45 | 55.55 | 65.05 | b | 71.26 | a | 78.23 | 73.24 | b | 67.26 | a | 55.70 | a | 48.47 | 35.87 | 55.34 | ||||||||
1967 | 35.21 | 40.94 | a | 51.58 | a | 57.79 | a | 61.84 | b | 71.52 | b | 77.37 | 71.92 | 66.12 | b | 58.15 | a | 46.52 | 33.53 | 56.04 | ||||||
1968 | 36.23 | 42.19 | 45.98 | a | 51.38 | 62.53 | b | 73.67 | a | 74.16 | b | 71.37 | 65.91 | a | 58.50 | 43.23 | b | 34.56 | 54.98 | |||||||
1969 | 42.21 | c | 40.22 | c | 42.07 | c | 56.92 | 63.74 | 72.36 | a | 77.73 | 76.44 | 68.08 | d | 55.72 | a | 43.21 | b | 39.02 | 56.48 | ||||||
1970 | 35.70 | c | 43.32 | c | 42.60 | 51.50 | 62.73 | 72.07 | a | 76.76 | b | 74.47 | 66.68 | 48.84 | 44.90 | 38.59 | b | 54.85 | ||||||||
1971 | 37.00 | d | 39.50 | 47.05 | 52.32 | b | 61.90 | a | 72.45 | a | 77.39 | 71.63 | 66.16 | a | 55.06 | 43.72 | a | 35.77 | 55.00 | |||||||
1972 | 36.90 | 41.14 | 51.54 | d | 55.68 | 61.92 | 70.90 | 76.24 | 72.73 | 66.00 | a | 57.97 | 40.38 | 36.40 | 55.65 | |||||||||||
1973 | 33.84 | 38.07 | 43.81 | e | 48.03 | 60.58 | a | 69.20 | 73.70 | a | 72.68 | 66.75 | 57.58 | 47.27 | b | 36.31 | b | 53.99 | ||||||||
1974 | 36.66 | 37.71 | 51.67 | b | 53.42 | 65.81 | 75.03 | 74.65 | 71.10 | a | 65.66 | e | 56.30 | c | 43.69 | c | 33.05 | 55.40 | ||||||||
1975 | 34.74 | 40.00 | 45.24 | 50.82 | 58.87 | 70.73 | 72.98 | b | 73.62 | a | 64.78 | 56.58 | a | 43.57 | c | 35.68 | i | 55.63 | a | |||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.50 | o | 67.95 | a | 55.34 | c | 43.41 | c | 32.38 | n | 55.56 | i |
1983 | 35.81 | b | 40.13 | a | 46.71 | e | 47.26 | e | 59.50 | i | 69.96 | b | 74.89 | h | 74.92 | f | 70.81 | a | 57.17 | b | 46.71 | f | 38.31 | e | 50.77 | d |
1984 | 36.54 | c | ----- | z | 44.50 | c | 51.59 | a | 66.54 | c | 70.69 | c | 73.54 | c | 70.94 | d | 65.92 | e | 51.34 | c | 44.20 | c | 36.79 | e | 55.69 | a |
1985 | 32.90 | 37.23 | 48.26 | b | 53.30 | e | 61.66 | b | 70.42 | d | 74.60 | g | 72.98 | a | 63.85 | d | 55.02 | e | 44.37 | 39.55 | j | 54.00 | b | |||
1986 | 40.02 | b | 43.72 | a | 49.48 | i | 52.52 | c | 58.70 | i | 70.12 | a | 71.16 | b | 74.69 | g | 66.03 | 53.32 | a | 41.89 | c | 35.07 | j | 54.85 | d | |
1987 | 31.62 | b | 38.52 | h | 43.79 | b | 49.50 | h | 61.35 | e | 70.56 | e | 74.29 | j | 72.59 | i | 65.88 | f | 59.10 | e | 43.25 | d | 30.04 | h | 51.61 | f |
1988 | 33.81 | b | 39.63 | f | 46.35 | g | 53.76 | e | 61.96 | g | 71.21 | f | 74.02 | h | 70.29 | c | 62.42 | f | 59.14 | b | 44.55 | b | 33.40 | g | 52.31 | g |
1989 | 35.29 | c | 42.41 | e | 49.98 | f | 59.36 | l | 64.94 | d | 71.88 | i | 73.82 | c | 71.79 | b | 64.34 | e | 54.05 | 42.50 | a | 32.62 | c | 53.53 | c | |
1990 | 32.16 | b | 37.36 | f | 45.90 | e | 54.12 | b | 59.62 | c | 75.64 | b | 71.41 | d | 69.81 | g | 66.39 | b | 54.79 | c | 43.24 | c | 33.69 | d | 53.70 | b |
1991 | 33.14 | b | 40.90 | b | 40.79 | g | 52.53 | a | 60.53 | b | 67.71 | d | 70.65 | g | 71.14 | i | 64.52 | b | 55.25 | i | 41.12 | b | 35.42 | e | 49.49 | d |
1992 | 31.64 | b | 40.92 | d | 46.68 | c | 56.04 | c | 60.86 | c | 67.98 | g | 73.29 | e | 72.74 | b | 67.16 | b | 59.57 | b | 38.67 | d | 32.71 | 52.75 | a | |
1993 | 38.93 | d | 40.67 | d | 46.14 | b | 54.77 | b | 61.48 | e | 72.31 | d | 75.90 | p | 71.24 | l | 65.74 | e | 53.82 | a | 41.96 | c | 35.05 | i | 52.87 | c |
1994 | 35.55 | 37.62 | c | 48.91 | d | 55.20 | c | 65.15 | h | 77.52 | d | 77.18 | c | 77.38 | g | 68.80 | e | 55.18 | f | 45.78 | 40.06 | 54.07 | c | |||
1995 | 36.60 | b | 46.43 | 50.26 | b | 51.95 | 62.54 | g | 70.31 | c | 75.10 | 75.56 | 68.87 | c | 58.32 | 47.67 | 39.39 | 56.41 | a | |||||||
1996 | 38.18 | 45.76 | b | 45.73 | e | 54.96 | c | 68.16 | 74.48 | c | 75.61 | h | 72.52 | e | 64.04 | b | 56.26 | b | 45.74 | g | 38.00 | a | 55.81 | b | ||
1997 | 34.62 | b | 40.00 | c | 49.31 | e | 52.74 | e | 64.63 | a | 71.46 | b | 75.30 | a | 73.81 | d | 69.20 | b | 55.27 | c | 42.56 | d | 34.07 | i | 57.17 | a |
1998 | 37.68 | 39.46 | 45.25 | c | 50.02 | b | 63.48 | 72.40 | e | 73.65 | d | 74.08 | f | 70.67 | 57.57 | c | 47.18 | e | 39.61 | c | 54.27 | a | ||||
1999 | 39.66 | c | 43.98 | d | 49.59 | d | 52.78 | a | ----- | z | 70.83 | a | 73.93 | c | 72.29 | c | 67.00 | c | 57.39 | c | 49.29 | a | 34.35 | e | 55.55 | a |
2000 | 40.24 | b | 45.66 | 47.86 | b | 57.32 | b | 68.94 | e | 72.67 | g | 77.14 | b | 74.76 | h | 69.88 | e | 56.80 | h | 38.33 | d | 36.70 | f | 55.67 | d | |
2001 | 33.55 | a | 40.64 | f | 45.60 | b | 56.63 | c | 64.76 | f | 73.45 | i | 76.52 | 73.19 | 69.44 | c | 59.02 | 46.78 | c | 35.78 | d | 55.17 | c | |||
2002 | 37.77 | 38.79 | 46.53 | a | 59.86 | b | 64.70 | c | 76.72 | e | 75.05 | a | 74.67 | h | 67.74 | a | 54.88 | c | 43.46 | d | 34.02 | i | 56.55 | b | ||
2003 | 40.73 | c | 40.80 | 46.68 | a | 55.22 | c | 66.12 | c | 72.00 | b | 80.48 | 75.73 | a | 68.22 | a | 61.17 | b | 47.25 | f | 38.61 | i | 60.72 | b | ||
2004 | 37.12 | b | 37.12 | d | 50.58 | 52.93 | 65.17 | d | 70.78 | c | 75.48 | a | 71.26 | 66.74 | e | 54.76 | d | 43.43 | h | 35.71 | 56.15 | a | ||||
2005 | 41.88 | a | 41.96 | b | 44.25 | g | 54.00 | c | 65.10 | e | 72.10 | e | 77.93 | a | 72.15 | a | 69.12 | m | 57.00 | 46.65 | 38.81 | 56.76 | b | |||
2006 | 38.67 | e | 43.17 | a | 48.62 | f | 59.44 | c | 67.46 | c | 76.55 | 76.73 | c | 70.83 | h | 62.33 | a | 54.37 | a | 46.28 | 34.45 | a | 55.95 | b | ||
2007 | 33.52 | 42.30 | a | 48.12 | a | 54.09 | b | 61.15 | 72.67 | 75.87 | a | 76.06 | 69.20 | b | 58.93 | b | 48.09 | a | 36.90 | a | 56.41 | |||||
2008 | 34.50 | a | 41.06 | b | 47.75 | a | 54.02 | c | 63.48 | b | 74.72 | a | 73.88 | a | 73.23 | c | 65.90 | a | 56.86 | c | 45.80 | b | 39.30 | a | 55.88 | |
2009 | 39.48 | a | 43.38 | b | 49.47 | b | 53.70 | 66.38 | b | 70.26 | a | 77.45 | a | 75.19 | m | 67.85 | d | 56.52 | b | 46.10 | 33.85 | a | 54.95 | a | ||
2010 | 34.42 | 37.70 | 44.76 | 55.62 | 63.17 | a | 74.82 | 75.24 | b | 75.20 | a | 70.98 | c | 59.11 | c | 43.27 | 43.05 | 56.44 | ||||||||
2011 | 34.13 | a | 37.27 | d | 51.31 | 57.80 | b | 62.97 | 75.16 | a | 77.47 | 77.35 | 68.33 | 57.12 | a | 44.72 | 32.34 | b | 56.33 | |||||||
2012 | 38.85 | 40.30 | a | 48.52 | b | 58.05 | 64.95 | a | 75.53 | a | 75.35 | 75.58 | 68.10 | a | ----- | z | ----- | z | 35.90 | e | 58.12 | b | ||||
2013 | 33.07 | a | 37.05 | ----- | z | 55.93 | 64.26 | 77.78 | 74.96 | c | 73.27 | p | 67.97 | 54.05 | 43.58 | 36.05 | 54.47 | b | ||||||||
2014 | 36.97 | 43.62 | 48.87 | 55.17 | 62.95 | 75.92 | 77.26 | 72.13 | 68.50 | a | 58.85 | 43.50 | 39.11 | 56.90 | ||||||||||||
2015 | 36.11 | 42.58 | b | 50.22 | b | 53.55 | k | 61.08 | 75.75 | 74.50 | 76.48 | 70.27 | 59.61 | 45.60 | 37.03 | 57.20 | a | |||||||||
2016 | 35.31 | 43.00 | 50.50 | a | 53.67 | 60.37 | 75.48 | b | 78.07 | j | 72.55 | 69.30 | 61.31 | 47.08 | 39.26 | 55.26 | a | |||||||||
2017 | 38.92 | a | 44.89 | 53.50 | 56.00 | 63.48 | 75.90 | a | 76.34 | 73.45 | 68.73 | 58.08 | 52.23 | 40.87 | 58.53 | |||||||||||
2018 | 39.13 | 44.93 | 49.52 | 58.00 | a | 68.52 | 77.16 | e | 76.21 | 75.60 | 70.18 | 56.06 | 42.77 | 36.03 | 57.84 | |||||||||||
2019 | 35.81 | 39.82 | 49.92 | f | 55.62 | n | 60.76 | ----- | z | 75.94 | n | 77.17 | b | 70.18 | e | 55.48 | 44.12 | 36.95 | 52.54 | d | ||||||
2020 | 37.35 | 39.60 | 50.16 | 56.62 | 67.76 | 73.86 | a | 78.73 | 78.58 | 67.29 | b | 58.79 | 49.33 | 35.84 | 57.83 | |||||||||||
2021 | 36.32 | 39.12 | 48.24 | 55.40 | 63.77 | a | 75.63 | 75.50 | 73.31 | d | 69.43 | i | 59.60 | 49.42 | 42.47 | b | 56.25 | a | ||||||||
2022 | 37.60 | 37.46 | 47.32 | 59.21 | b | 67.52 | c | 73.90 | a | 79.10 | 74.61 | d | 69.15 | 55.23 | 41.12 | 37.85 | 56.67 | |||||||||
2023 | 37.29 | 39.82 | 47.39 | 56.37 | 68.85 | 73.19 | c | 81.76 | 78.65 | 72.67 | a | 60.56 | 48.50 | a | 40.34 | c | 58.78 | |||||||||
2024 | 38.11 | 44.20 | b | 49.27 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.86 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.25 | 40.27 | 46.93 | 54.49 | 63.70 | 72.95 | 75.88 | 73.93 | 67.76 | 56.91 | 44.60 | 36.78 | 56.00 | |||||||||||||
S.D. | 2.83 | 3.25 | 2.79 | 2.68 | 2.37 | 2.44 | 1.99 | 1.92 | 2.07 | 2.39 | 2.80 | 2.68 | 1.17 | |||||||||||||
SKEW | 0.10 | -0.08 | -0.05 | -0.27 | 0.33 | 0.07 | 0.24 | 0.42 | -0.13 | -0.22 | 0.15 | -0.09 | 0.58 | |||||||||||||
MAX | 42.21 | 48.62 | 53.50 | 59.86 | 68.94 | 77.78 | 81.76 | 78.65 | 72.67 | 63.40 | 52.23 | 43.05 | 58.78 | |||||||||||||
MIN | 30.95 | 31.59 | 41.46 | 47.26 | 58.87 | 67.71 | 71.16 | 70.29 | 62.33 | 48.84 | 38.33 | 29.60 | 53.96 | |||||||||||||
YRS | 75 | 69 | 64 | 70 | 67 | 68 | 62 | 60 | 72 | 72 | 71 | 63 | 30 |