YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | 35.72 | v | 40.60 | c | 44.20 | d | 51.50 | f | 56.76 | 62.29 | b | 70.50 | a | 69.68 | c | 59.90 | a | 53.55 | a | 39.08 | 32.33 | a | 52.89 | b | ||
1937 | 15.30 | a | 30.38 | c | 40.60 | e | 47.13 | c | 56.65 | d | 61.66 | b | 69.48 | a | 66.18 | 61.22 | 52.92 | a | 40.73 | 34.78 | d | 48.08 | ||||
1938 | 35.00 | b | 33.32 | 38.61 | c | 46.21 | b | 54.56 | 64.56 | c | 72.05 | a | 65.53 | 61.63 | 47.82 | i | 36.92 | j | 35.21 | e | 50.67 | b | ||||
1939 | 33.17 | e | 35.15 | a | 44.60 | a | 51.92 | 56.08 | 60.93 | 70.71 | 71.03 | a | 62.43 | 51.62 | a | 41.47 | 39.56 | 51.56 | ||||||||
1940 | 39.40 | 41.03 | 46.16 | b | 51.16 | b | 58.69 | 69.12 | a | 67.81 | 70.95 | 59.03 | a | 51.39 | 37.69 | a | 34.55 | 52.25 | ||||||||
1941 | 35.89 | 41.66 | 44.94 | 46.23 | b | 53.30 | a | 56.28 | a | 70.52 | 66.07 | a | 55.91 | a | 47.76 | f | 43.88 | b | 36.08 | 50.07 | a | |||||
1942 | 34.37 | 36.93 | 41.37 | 46.37 | 51.00 | 60.50 | d | 70.03 | 69.37 | 60.85 | 52.44 | 42.71 | a | 36.77 | 50.23 | |||||||||||
1943 | 32.94 | d | 41.20 | 45.35 | a | 50.45 | 52.66 | 57.29 | b | 68.42 | 64.48 | 65.20 | 50.18 | a | 41.78 | 35.92 | 50.49 | |||||||||
1944 | 34.21 | 37.89 | a | 42.15 | 45.43 | 54.27 | 60.15 | 68.63 | 66.55 | 61.50 | 54.44 | 39.50 | 34.78 | a | 49.96 | |||||||||||
1945 | 37.21 | 40.21 | 40.85 | a | 48.10 | 55.63 | 60.97 | 70.97 | 68.24 | 60.03 | 53.79 | 40.93 | 37.55 | 51.21 | ||||||||||||
1946 | 34.19 | 36.64 | 43.32 | a | 49.90 | 56.19 | 59.72 | 68.90 | 69.58 | a | 58.03 | 46.37 | 39.58 | 36.90 | 49.95 | |||||||||||
1947 | 31.76 | 42.72 | a | 46.50 | 50.42 | 59.71 | 60.22 | 66.70 | c | 65.13 | 61.15 | 52.77 | a | 40.12 | 34.35 | 50.96 | ||||||||||
1948 | 35.26 | 37.10 | 39.72 | a | 42.95 | a | 51.58 | a | 62.81 | a | 66.82 | a | 65.32 | 58.87 | 51.07 | b | 39.35 | 29.85 | a | 48.39 | ||||||
1949 | 20.73 | 32.82 | 42.66 | 52.60 | 56.60 | j | 63.02 | 69.89 | 66.82 | 62.82 | 47.94 | 44.74 | a | 33.77 | 48.89 | a | ||||||||||
1950 | 26.74 | 35.98 | 42.63 | 48.57 | 55.87 | 62.62 | 70.94 | 70.08 | 62.18 | 51.68 | a | 44.20 | 40.44 | 50.99 | ||||||||||||
1951 | 34.05 | 38.98 | 41.22 | a | 53.28 | a | 55.56 | 65.37 | 69.94 | 69.19 | 64.70 | 50.16 | 41.55 | 33.00 | 51.42 | |||||||||||
1952 | 28.58 | 36.88 | 39.31 | 50.67 | 56.53 | 59.65 | 72.40 | 67.92 | 64.28 | 55.53 | 36.23 | 33.11 | 50.09 | |||||||||||||
1953 | 38.94 | 40.73 | 42.23 | 47.50 | 49.32 | 56.70 | 69.55 | 66.10 | 64.97 | 48.84 | 45.65 | 36.60 | 50.59 | |||||||||||||
1954 | 37.23 | 41.93 | 41.71 | 50.36 | b | 58.08 | 59.35 | 68.06 | 63.82 | 56.98 | 48.85 | 43.07 | 34.24 | 50.31 | ||||||||||||
1955 | 30.16 | 35.88 | 41.97 | 43.32 | 54.17 | a | 64.84 | a | 66.43 | a | 70.23 | 58.92 | 52.74 | 39.32 | b | 37.77 | 49.65 | |||||||||
1956 | 37.37 | a | 32.71 | 42.61 | 51.45 | a | 55.77 | 60.75 | 70.88 | a | 66.29 | 61.18 | 49.85 | 39.17 | f | 31.98 | b | 50.99 | a | |||||||
1957 | 26.73 | a | 39.89 | 44.19 | 48.42 | 56.06 | 64.88 | 66.85 | 64.58 | 63.52 | 48.50 | b | 39.23 | 35.68 | 49.88 | |||||||||||
1958 | 36.26 | 44.00 | 40.18 | 47.32 | 59.87 | 63.00 | 72.39 | c | 72.73 | 61.48 | a | 54.73 | 42.72 | 39.82 | 52.87 | |||||||||||
1959 | 38.60 | 37.79 | 44.85 | a | 52.66 | a | 52.76 | 65.35 | 72.08 | 68.24 | 58.83 | 52.94 | 39.48 | 32.10 | 51.31 | |||||||||||
1960 | 34.08 | 39.59 | 46.97 | b | 48.15 | 53.50 | 65.48 | 73.02 | 66.69 | 62.92 | 52.02 | 41.40 | 33.81 | 51.47 | ||||||||||||
1961 | 37.23 | 41.68 | 42.19 | 48.23 | 52.06 | 67.68 | 69.84 | 71.58 | 58.17 | 51.92 | a | 38.45 | a | 34.92 | 51.16 | |||||||||||
1962 | 29.16 | 37.02 | a | 41.37 | 52.88 | 52.87 | a | ----- | z | 67.95 | a | 67.92 | 64.07 | 51.54 | c | 43.02 | c | 38.38 | e | 49.65 | a | |||||
1963 | 32.52 | 46.02 | 42.98 | a | 44.47 | 57.32 | 61.58 | 66.15 | 67.05 | 64.26 | a | 52.32 | 41.69 | i | 38.02 | a | 52.06 | a | ||||||||
1964 | 34.35 | 37.59 | 41.79 | 47.40 | 53.47 | b | 61.08 | 70.27 | 68.15 | 59.32 | 55.40 | 39.80 | 37.79 | 50.53 | ||||||||||||
1965 | 33.92 | a | 40.79 | 44.74 | 49.62 | 53.50 | a | 62.27 | 69.37 | 67.68 | 58.95 | 55.37 | 45.19 | d | 32.46 | c | 51.15 | |||||||||
1966 | 33.60 | 37.37 | a | 43.81 | 51.15 | 59.53 | 61.77 | 66.52 | 70.11 | 62.79 | b | 51.30 | a | 41.33 | c | 35.44 | 51.23 | |||||||||
1967 | 34.50 | 40.07 | 40.05 | 41.15 | c | 56.85 | a | 64.08 | 72.05 | 73.13 | 66.35 | 52.27 | c | 42.98 | a | 22.05 | a | 50.46 | ||||||||
1968 | 28.23 | 42.25 | a | 45.35 | 48.33 | 55.24 | 64.67 | a | 72.05 | 65.11 | 61.65 | 50.21 | b | 39.50 | g | 31.93 | d | 51.37 | a | |||||||
1969 | 29.43 | a | 34.83 | a | 42.67 | b | 47.88 | 59.84 | f | 64.28 | 69.13 | 66.85 | 62.78 | 46.34 | b | 38.17 | 35.40 | 48.89 | a | |||||||
1970 | 37.00 | 40.74 | a | 43.21 | g | 43.24 | a | 57.94 | 66.07 | 71.15 | 68.50 | 59.10 | 50.47 | 44.09 | a | 32.94 | d | 51.93 | a | |||||||
1971 | 33.58 | l | 40.02 | 41.32 | 46.43 | a | 54.16 | 61.53 | 70.75 | a | 71.71 | 59.45 | 49.21 | 41.20 | 33.23 | k | 53.58 | b | ||||||||
1972 | 34.98 | h | 38.31 | k | 48.52 | 46.72 | a | 57.12 | c | 66.00 | 71.66 | 69.90 | 59.40 | 51.92 | e | 40.95 | i | 30.33 | m | 58.91 | d | |||||
1973 | 33.93 | j | 41.50 | j | 41.17 | j | 49.52 | i | 60.63 | h | 63.90 | 70.52 | 68.26 | 60.65 | 49.67 | d | 42.64 | h | 39.06 | o | 62.60 | g | ||||
1974 | 32.61 | h | 37.06 | j | 42.75 | i | 45.57 | h | 54.43 | c | 64.92 | 67.06 | 67.90 | a | 64.17 | 51.15 | 40.69 | n | 36.75 | q | 61.60 | f | ||||
1975 | 31.28 | h | 36.53 | i | 38.79 | l | 41.41 | h | 55.35 | h | 61.65 | 68.52 | a | 64.85 | 63.91 | a | 50.07 | h | 38.42 | l | 37.81 | m | 64.73 | h | ||
1976 | 37.08 | k | 37.00 | l | 41.65 | k | 44.75 | j | 55.12 | j | 59.16 | a | 69.15 | 63.71 | 62.87 | 52.65 | e | 45.19 | i | 34.23 | k | 61.51 | g | |||
1977 | 22.91 | n | 37.50 | j | 39.76 | l | 51.86 | h | 48.80 | d | 67.40 | 69.06 | 70.00 | 59.61 | g | 50.11 | l | 40.29 | i | 38.39 | l | 63.82 | h | |||
1978 | 39.24 | l | 40.47 | k | 48.15 | k | 46.53 | n | 50.82 | l | 61.25 | 68.45 | 65.58 | 53.82 | h | 53.03 | l | 39.02 | i | 30.82 | l | 65.09 | i | |||
1979 | 32.50 | i | 37.74 | i | 44.92 | k | 46.19 | i | 56.46 | h | 62.92 | 68.95 | a | 66.06 | 63.54 | e | 54.67 | j | 38.60 | j | 36.93 | q | 65.37 | h | ||
1980 | 34.61 | l | 42.44 | l | 40.95 | l | 47.79 | i | 54.13 | l | 58.21 | b | 70.26 | 66.71 | 60.63 | c | 52.33 | m | 40.15 | q | 35.47 | l | 63.95 | h | ||
1981 | 38.00 | m | 39.30 | m | 42.39 | l | 51.35 | j | 54.96 | c | 64.48 | 69.84 | 70.45 | 62.43 | 47.66 | i | 44.31 | l | 38.32 | n | 64.43 | g | ||||
1982 | ----- | z | 35.36 | j | 41.23 | i | 43.00 | i | 56.62 | k | 63.82 | e | 67.88 | c | 67.20 | h | 56.27 | h | 48.08 | k | 38.75 | j | 32.68 | l | 65.85 | j |
1983 | 36.17 | j | 39.06 | k | 43.22 | h | 44.86 | i | 55.39 | i | 61.45 | i | 63.92 | l | 68.79 | g | 59.26 | g | 51.23 | k | 40.60 | j | 36.58 | k | ----- | z |
1984 | 34.00 | j | 38.30 | i | 45.00 | j | 44.45 | i | 54.07 | j | 59.10 | j | 71.74 | j | 69.92 | m | 60.81 | l | 46.32 | i | 37.50 | k | 32.98 | k | ----- | z |
1985 | 34.36 | j | 38.44 | j | 37.90 | j | 51.14 | h | 55.05 | j | 66.65 | q | 72.45 | j | 65.39 | h | 55.77 | f | 48.61 | h | 33.41 | m | 33.05 | j | ----- | z |
1986 | 39.81 | j | 42.29 | i | 46.40 | k | 48.23 | j | 53.58 | k | 67.07 | i | 67.70 | i | 71.93 | j | 54.27 | h | 50.57 | h | 40.88 | m | 32.85 | k | ----- | z |
1987 | 32.18 | l | 38.03 | i | 41.93 | i | 53.59 | h | 58.32 | i | 64.93 | h | 65.93 | i | 67.79 | j | 61.17 | l | 55.86 | j | 41.18 | k | 35.45 | k | ----- | z |
1988 | 30.47 | m | 38.88 | i | 41.96 | h | 49.38 | j | 52.80 | k | 61.34 | h | 70.70 | k | 69.07 | h | 60.42 | j | 56.20 | k | 40.22 | l | 31.29 | j | ----- | z |
1989 | 29.65 | k | 31.63 | i | 41.26 | h | 51.77 | j | 52.91 | i | 62.39 | h | 66.90 | k | 64.31 | g | 58.55 | j | 48.05 | j | 37.35 | j | 32.00 | k | ----- | z |
1990 | 32.55 | j | 28.08 | j | 42.55 | i | 51.81 | i | 50.58 | g | 59.10 | i | 69.26 | j | 66.59 | h | 59.53 | l | 49.52 | k | 35.79 | m | 26.25 | k | ----- | z |
1991 | 31.77 | k | 40.84 | i | 36.14 | j | 44.47 | m | 49.08 | k | 56.40 | j | 69.66 | c | 66.87 | 62.85 | 52.10 | g | 39.62 | j | 30.77 | g | 66.46 | i | ||
1992 | 32.74 | j | 41.39 | j | 45.50 | j | 49.71 | i | 58.75 | k | 62.98 | f | 66.86 | j | 67.43 | j | 58.79 | i | 50.38 | j | 39.84 | k | 32.83 | j | ----- | z |
1993 | 28.21 | n | 35.63 | i | 46.90 | k | 46.10 | j | 54.40 | j | 58.57 | g | 63.60 | j | 66.74 | h | 61.65 | j | 51.98 | k | 36.29 | f | 35.15 | h | ----- | z |
1994 | 35.61 | m | 37.50 | j | 45.41 | h | 49.75 | j | 57.92 | l | 61.12 | j | 73.70 | k | 68.75 | i | 63.92 | j | 49.61 | l | 33.30 | j | 34.55 | k | ----- | z |
1995 | 39.17 | k | 43.79 | i | 42.57 | h | 47.38 | j | 53.31 | m | 58.36 | i | 66.62 | k | 66.22 | h | 64.05 | i | 50.84 | i | 46.93 | h | 43.00 | q | ----- | z |
1996 | 36.12 | n | 43.33 | i | 44.50 | i | 48.05 | h | 54.41 | i | 63.10 | a | 73.23 | c | 70.71 | g | 59.23 | f | 51.10 | b | 43.26 | k | 36.50 | m | 62.48 | i |
1997 | 34.52 | j | 38.55 | i | 46.05 | j | 46.67 | i | 60.21 | j | 62.02 | f | 68.89 | i | 69.41 | i | 62.60 | d | 50.52 | i | 44.45 | k | 34.02 | j | 62.60 | k |
1998 | 36.75 | k | 39.21 | i | 43.61 | i | 48.62 | i | 49.65 | k | 62.55 | k | 72.48 | i | 71.33 | k | 64.95 | i | 49.86 | j | 41.07 | i | 31.93 | j | ----- | z |
1999 | 34.66 | l | 35.79 | i | 40.35 | h | 44.93 | h | 53.55 | k | 60.45 | h | 67.33 | j | 67.60 | j | 62.40 | i | 52.52 | k | 45.85 | j | 34.26 | j | ----- | z |
2000 | 36.38 | k | 40.08 | j | 42.50 | h | 52.20 | j | 54.21 | j | 65.50 | h | 67.92 | k | 69.41 | i | 62.35 | j | 49.69 | j | 36.48 | i | 34.80 | k | ----- | z |
2001 | 34.67 | j | 34.84 | i | 45.21 | j | 45.62 | i | 59.93 | i | 62.10 | i | 68.50 | k | 69.48 | h | 60.25 | l | 53.43 | i | 40.52 | i | 36.38 | k | ----- | z |
2002 | 34.83 | j | 40.34 | i | 41.81 | j | 51.16 | h | 54.07 | i | 66.05 | j | 73.69 | j | 68.43 | i | 63.33 | j | 49.68 | i | 42.55 | k | 37.00 | j | ----- | z |
2003 | 40.74 | j | 39.47 | i | 45.21 | j | 44.70 | h | 56.40 | j | 67.74 | i | 74.73 | i | 70.45 | k | 63.31 | i | 54.80 | i | 38.28 | l | 39.64 | j | ----- | z |
2004 | 35.86 | m | 39.21 | j | 48.52 | h | 51.00 | h | 56.52 | j | 65.60 | j | 73.12 | j | 70.36 | i | 60.45 | i | 52.03 | m | 40.70 | j | 36.57 | j | ----- | z |
2005 | 31.48 | k | 40.39 | i | 45.09 | h | 47.24 | i | 55.67 | j | 59.14 | h | 73.00 | k | 71.30 | h | 60.55 | i | 51.18 | l | 40.85 | j | 34.98 | k | ----- | z |
2006 | 36.05 | k | 39.61 | j | 37.40 | j | 48.92 | j | 59.55 | i | 66.07 | h | 74.88 | k | 67.72 | h | 62.18 | k | 50.08 | k | 42.70 | j | 36.30 | k | ----- | z |
2007 | 31.65 | k | 37.11 | i | 44.73 | i | 49.14 | i | 58.70 | i | 64.29 | i | 73.08 | k | 69.89 | h | 61.16 | k | 48.79 | j | 41.98 | j | 35.45 | l | ----- | z |
2008 | 28.84 | o | 35.39 | j | 42.24 | j | 44.17 | f | 55.64 | j | 61.43 | i | 70.93 | i | 70.21 | j | 63.67 | i | 52.93 | i | 42.47 | l | 32.98 | j | ----- | z |
2009 | 36.50 | k | 40.00 | t | 41.07 | i | 48.23 | h | 56.98 | k | 64.19 | i | 71.42 | k | 69.31 | r | 63.47 | n | 47.06 | n | 39.62 | r | 32.36 | q | ----- | z |
2010 | 38.40 | p | 38.64 | n | 40.89 | m | 42.11 | l | 46.16 | o | 59.28 | n | 71.58 | m | 68.56 | m | 60.82 | m | 50.16 | o | 39.65 | q | 36.56 | n | ----- | z |
2011 | 33.97 | p | 35.10 | m | 40.68 | l | 42.78 | l | 48.94 | n | 58.38 | m | 66.59 | o | 68.94 | m | 63.24 | m | 46.87 | p | 38.62 | n | 31.21 | n | ----- | z |
2012 | 34.56 | o | 37.06 | m | 38.44 | m | 46.09 | n | 54.92 | m | 59.71 | m | 69.20 | p | 70.79 | l | 64.30 | o | 52.03 | n | 41.95 | h | 32.41 | h | ----- | z |
2013 | 28.44 | o | 35.30 | m | 43.09 | o | 46.94 | m | 54.19 | m | 61.66 | n | 73.47 | p | 67.71 | n | 59.13 | o | 46.06 | v | 40.71 | p | 21.97 | p | ----- | z |
2014 | 30.50 | o | 38.90 | m | 43.76 | l | 49.03 | l | 57.59 | n | 64.28 | n | 76.92 | m | 70.72 | m | 62.38 | m | 50.11 | m | 41.87 | o | 39.91 | o | ----- | z |
2015 | 37.77 | p | 42.77 | m | 45.97 | n | 47.84 | k | 54.07 | p | 67.71 | m | 70.92 | m | 68.19 | o | 60.12 | n | 55.00 | o | 39.42 | r | 35.25 | m | ----- | z |
2016 | 37.20 | p | 41.13 | n | 43.71 | l | 52.50 | m | 60.16 | o | 71.22 | l | 72.31 | o | 72.00 | m | 61.00 | m | 48.13 | l | 43.17 | l | 31.24 | n | ----- | z |
2017 | 29.57 | p | 38.83 | m | 44.98 | k | 45.83 | l | 59.32 | l | 67.00 | l | 72.82 | q | 73.05 | l | 61.12 | n | 48.31 | o | 41.69 | n | 30.25 | o | ----- | z |
2018 | 39.19 | o | 35.03 | m | 41.91 | n | 47.86 | p | 60.22 | m | 64.88 | m | 75.53 | p | 71.32 | l | 60.30 | o | 49.79 | n | 40.00 | o | 35.36 | t | ----- | z |
2019 | ----- | z | 34.11 | n | 41.59 | n | 51.65 | m | 55.94 | m | 65.18 | m | 69.97 | o | 72.24 | n | 59.13 | o | 43.71 | n | 39.00 | o | 37.11 | q | ----- | z |
2020 | 36.88 | o | 41.37 | n | 45.31 | r | 56.20 | t | 58.07 | p | 69.03 | k | 74.50 | p | 73.79 | s | 67.34 | n | 56.30 | p | 43.08 | r | 35.38 | r | ----- | z |
2021 | 39.70 | u | ----- | z | 45.50 | y | 53.55 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.90 | t | 78.08 | s | ----- | z | ----- | z | ----- | z | 37.93 | w | 33.81 | o | ----- | z |
2023 | 39.00 | r | 34.89 | n | 35.88 | n | 47.21 | p | 59.31 | o | 66.59 | n | 74.93 | q | 74.08 | m | 62.34 | n | 51.72 | o | 43.80 | o | 41.20 | p | ----- | z |
2024 | 41.22 | o | 41.17 | n | 43.12 | n | 52.00 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 32.89 | 38.62 | 42.88 | 48.28 | 55.08 | 62.54 | 69.66 | 67.85 | 61.49 | 51.47 | 41.21 | 34.87 | 50.65 | |||||||||||||
S.D. | 5.10 | 3.41 | 2.29 | 3.03 | 2.65 | 2.84 | 1.84 | 2.39 | 2.36 | 2.25 | 2.33 | 3.34 | 1.05 | |||||||||||||
SKEW | -1.58 | -0.31 | 0.37 | -0.33 | -0.29 | -0.07 | -0.08 | 0.28 | -0.18 | -0.27 | 0.06 | -1.44 | -0.47 | |||||||||||||
MAX | 39.40 | 46.02 | 48.52 | 53.28 | 59.87 | 69.12 | 73.23 | 73.13 | 66.35 | 55.53 | 45.65 | 40.44 | 52.87 | |||||||||||||
MIN | 15.30 | 30.38 | 38.61 | 41.15 | 48.80 | 56.28 | 66.15 | 63.71 | 55.91 | 46.34 | 36.23 | 22.05 | 48.08 | |||||||||||||
YRS | 34 | 36 | 36 | 36 | 38 | 47 | 49 | 47 | 46 | 39 | 32 | 35 | 25 |