YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | 27.11 | v | 29.50 | c | 27.96 | d | 34.25 | f | 38.94 | 44.50 | b | 49.40 | a | 47.46 | c | 36.17 | a | 29.30 | a | 15.77 | 19.20 | a | 33.82 | b | ||
1937 | 0.45 | 18.60 | c | 27.88 | e | 33.67 | c | 36.81 | d | 44.25 | b | 47.63 | a | 42.19 | 38.00 | 33.37 | a | 30.27 | 27.36 | c | 31.71 | |||||
1938 | 27.17 | b | 26.11 | 28.93 | c | 32.86 | b | 36.71 | 42.70 | c | 50.00 | 42.13 | 40.30 | 28.43 | h | 21.00 | d | 24.12 | e | 33.82 | a | |||||
1939 | 20.74 | d | 21.81 | a | 27.80 | a | 32.33 | 35.87 | 39.03 | 47.13 | 45.20 | a | 39.70 | 31.00 | a | 20.50 | 29.74 | 32.57 | ||||||||
1940 | 29.13 | 32.45 | 31.79 | b | 34.79 | b | 39.23 | 47.72 | a | 46.58 | 46.48 | 42.34 | a | 33.90 | 27.69 | a | 27.52 | 36.64 | ||||||||
1941 | 28.10 | 31.86 | 29.06 | 31.79 | b | 39.58 | 39.97 | 49.77 | 47.27 | a | 34.52 | a | 29.72 | f | 30.17 | a | 28.94 | 35.55 | a | |||||||
1942 | 24.39 | 23.29 | 24.42 | 30.77 | 35.65 | 41.50 | d | 48.19 | 45.55 | 36.80 | 31.16 | 30.03 | a | 29.52 | 33.44 | |||||||||||
1943 | 23.56 | d | 27.43 | 30.03 | a | 35.60 | 33.71 | 39.50 | b | 45.71 | 43.13 | 39.63 | 33.26 | 30.10 | 25.77 | 33.95 | ||||||||||
1944 | 25.65 | 25.43 | a | 25.61 | 30.57 | 35.58 | 42.97 | 47.52 | 44.58 | 38.33 | 33.35 | 28.97 | 28.77 | a | 33.94 | |||||||||||
1945 | 28.42 | 29.14 | 28.57 | a | 31.57 | 41.26 | 41.47 | 47.71 | 45.16 | 35.83 | 35.52 | 31.77 | 30.13 | 35.54 | ||||||||||||
1946 | 24.35 | 25.07 | 29.73 | a | 31.87 | 36.87 | 41.33 | 48.16 | 45.80 | a | 34.63 | 29.94 | 26.53 | 27.23 | 33.46 | |||||||||||
1947 | 20.74 | 27.67 | a | 30.45 | 32.83 | 39.23 | 41.77 | 46.74 | 42.65 | 35.73 | 38.13 | 26.90 | 24.45 | 33.94 | ||||||||||||
1948 | 22.97 | 24.86 | 26.87 | 31.20 | 37.17 | a | 45.13 | 45.74 | 43.65 | 37.50 | 33.13 | a | 25.73 | 20.93 | a | 32.91 | ||||||||||
1949 | 5.81 | 19.82 | 31.55 | 32.67 | 41.00 | j | 40.70 | 46.48 | 45.13 | 40.00 | 27.45 | 28.31 | a | 22.90 | 30.98 | a | ||||||||||
1950 | 16.48 | 22.11 | 29.97 | 31.43 | 35.81 | 43.83 | 47.74 | 47.06 | 41.60 | 36.83 | a | 33.73 | 34.13 | 35.06 | ||||||||||||
1951 | 26.19 | 27.82 | 25.74 | 34.30 | 37.58 | 42.93 | 46.87 | 47.32 | 40.90 | 34.00 | 30.20 | 25.94 | 34.98 | |||||||||||||
1952 | 20.52 | 25.66 | 26.32 | 32.57 | 38.06 | 42.60 | 50.42 | 45.48 | 41.50 | 34.19 | 21.97 | 28.48 | 33.98 | |||||||||||||
1953 | 32.52 | 26.86 | 27.52 | 32.33 | 35.74 | 40.03 | 46.26 | 46.29 | 41.07 | 29.97 | 36.13 | 28.10 | 35.23 | |||||||||||||
1954 | 29.42 | 27.89 | 27.26 | 34.14 | b | 37.81 | 41.43 | 44.16 | 45.19 | 35.70 | 29.52 | 28.67 | 26.10 | 33.94 | ||||||||||||
1955 | 22.03 | 22.32 | 25.68 | 29.23 | 34.32 | 44.63 | 44.48 | 46.06 | 36.77 | 33.81 | 29.46 | b | 31.00 | 33.32 | ||||||||||||
1956 | 29.26 | 22.34 | 26.55 | 34.10 | 38.35 | 42.27 | 49.37 | a | 44.90 | 39.33 | 34.87 | 24.58 | f | 20.03 | b | 34.67 | a | |||||||||
1957 | 14.63 | a | 28.04 | 33.81 | 32.77 | 39.52 | 44.30 | 45.42 | 42.97 | 41.83 | 36.21 | b | 26.40 | 27.39 | 34.44 | |||||||||||
1958 | 29.35 | 34.93 | 27.87 | 32.07 | 39.55 | 46.47 | 52.77 | a | 50.97 | 40.43 | 32.58 | 33.27 | 32.23 | 37.71 | ||||||||||||
1959 | 29.77 | 26.79 | 27.39 | 32.60 | 33.90 | 43.53 | 48.00 | 45.32 | 40.60 | 31.65 | 16.67 | 18.32 | 32.88 | |||||||||||||
1960 | 25.10 | 27.79 | 32.70 | a | 32.73 | 37.00 | 43.20 | 50.87 | 44.23 | 39.33 | 32.68 | 29.60 | 25.06 | 35.02 | ||||||||||||
1961 | 25.81 | 31.46 | 31.68 | 30.40 | 37.13 | 47.70 | 47.23 | 51.52 | 37.60 | 32.93 | a | 24.57 | 26.06 | 35.34 | ||||||||||||
1962 | 15.81 | 26.15 | a | 28.39 | 33.17 | 37.03 | ----- | z | 44.42 | 48.42 | 41.13 | 35.64 | c | 31.00 | b | 28.65 | e | 33.62 | a | |||||||
1963 | 18.35 | 34.18 | 28.29 | 33.20 | 40.65 | 42.23 | 45.32 | 45.81 | 42.03 | a | 36.10 | 32.24 | i | 28.37 | a | 35.87 | a | |||||||||
1964 | 24.52 | 21.93 | 27.00 | 27.60 | 35.32 | 43.50 | 49.55 | 44.68 | 34.67 | 33.26 | 28.67 | 30.58 | 33.44 | |||||||||||||
1965 | 27.00 | 25.61 | 27.39 | 36.70 | 35.30 | a | 42.63 | 47.55 | 49.94 | 36.77 | 32.35 | 33.48 | c | 22.48 | b | 34.77 | ||||||||||
1966 | 23.39 | 24.26 | a | 29.19 | 31.37 | 38.45 | 42.43 | 43.48 | 46.35 | 40.40 | 29.61 | 29.22 | c | 27.13 | 33.77 | |||||||||||
1967 | 24.00 | 23.89 | 26.68 | 29.30 | c | 37.23 | a | 44.90 | 49.55 | 48.90 | 42.57 | 33.59 | b | 28.97 | a | 11.81 | 33.45 | |||||||||
1968 | 17.10 | 29.45 | 30.06 | 29.40 | 36.00 | 43.13 | 48.84 | 45.19 | 36.50 | 30.24 | b | 29.71 | f | 22.61 | c | 33.50 | a | |||||||||
1969 | 20.73 | a | 25.22 | a | 26.34 | b | 31.60 | 39.11 | d | 46.60 | 46.16 | 39.84 | 37.67 | 25.86 | b | 18.57 | 24.16 | 31.82 | ||||||||
1970 | 27.42 | 25.39 | 26.40 | f | 26.27 | 37.26 | 44.97 | 46.81 | 41.81 | 33.10 | 29.39 | 33.28 | a | 26.44 | d | 33.83 | a | |||||||||
1971 | 22.79 | l | 26.07 | 28.68 | 30.52 | a | 35.45 | 43.70 | 48.87 | 48.94 | 37.70 | 30.10 | 27.43 | 24.00 | j | 35.75 | b | |||||||||
1972 | 23.48 | h | 26.80 | i | 33.68 | 30.86 | a | 37.93 | c | 45.57 | 49.23 | 47.71 | 39.23 | 32.42 | e | 30.38 | i | 18.05 | l | 39.58 | d | |||||
1973 | 24.90 | j | 29.68 | i | 27.09 | i | 30.76 | i | 40.84 | f | 44.90 | 48.55 | 45.65 | 40.23 | 31.63 | d | 34.14 | h | 32.44 | m | 42.19 | g | ||||
1974 | 21.39 | h | 24.79 | i | 31.50 | i | 31.73 | h | 37.89 | c | 46.77 | 48.13 | 46.19 | 38.70 | 29.81 | 26.84 | k | 27.19 | o | 41.25 | f | |||||
1975 | 20.70 | h | 25.79 | i | 27.35 | k | 28.00 | h | 37.00 | g | 42.27 | 49.67 | a | 44.42 | 40.00 | a | 33.88 | g | 26.68 | k | 30.33 | m | 44.09 | h | ||
1976 | 27.70 | k | 23.00 | j | 26.67 | j | 30.05 | h | 34.81 | j | 39.41 | a | 49.84 | 47.52 | 42.83 | 30.15 | e | 30.00 | i | 18.00 | j | 41.95 | g | |||
1977 | 11.20 | k | 21.37 | i | 27.18 | i | 32.26 | g | 35.75 | c | 49.40 | 47.84 | 48.06 | 39.12 | e | 29.25 | k | 26.52 | i | 28.24 | j | 44.03 | g | |||
1978 | 28.81 | j | 27.28 | j | 34.09 | i | 32.58 | k | 33.48 | h | 40.60 | 47.55 | 45.00 | 35.88 | f | 28.76 | j | 24.29 | i | 20.58 | l | 44.38 | i | |||
1979 | 20.64 | i | 26.68 | i | 30.59 | i | 32.71 | i | 38.68 | f | 42.30 | 48.43 | a | 47.48 | 41.15 | d | 38.14 | i | 24.90 | i | 25.33 | m | 44.84 | h | ||
1980 | 24.10 | k | 30.47 | j | 27.00 | j | 31.86 | h | 37.00 | j | 41.79 | b | 50.19 | 44.00 | 38.07 | c | 29.95 | k | 24.53 | m | 23.67 | j | 43.51 | h | ||
1981 | 29.81 | j | 26.42 | i | 27.95 | i | 34.32 | h | 38.07 | b | 43.47 | 46.23 | 46.48 | 39.53 | 29.95 | i | 33.11 | l | 29.50 | k | 42.76 | g | ||||
1982 | ----- | z | 21.89 | j | 28.77 | i | 27.57 | i | 36.35 | k | 47.08 | e | 48.46 | c | 45.52 | h | 36.23 | h | 30.15 | k | 25.35 | j | 23.11 | l | 47.77 | j |
1983 | 25.62 | j | 29.47 | k | 33.22 | h | 31.10 | i | 37.00 | i | 43.48 | i | 44.21 | l | 50.71 | g | 40.48 | g | 32.70 | k | 31.50 | j | 28.40 | k | ----- | z |
1984 | 23.48 | j | 24.90 | i | 29.62 | j | 30.95 | i | 36.48 | j | 40.60 | j | 49.33 | j | 47.22 | m | 38.56 | l | 29.91 | i | 28.16 | k | 23.40 | k | ----- | z |
1985 | 20.43 | j | 23.56 | j | 21.57 | j | 32.77 | h | 36.76 | j | 47.77 | q | 50.14 | j | 43.61 | h | 36.71 | f | 28.17 | h | 18.12 | m | 18.48 | j | ----- | z |
1986 | 27.48 | j | 29.74 | i | 29.90 | k | 31.05 | j | 35.45 | k | 46.86 | i | 46.50 | i | 47.48 | j | 36.00 | h | 28.96 | h | 23.88 | m | 23.20 | k | ----- | z |
1987 | 19.26 | l | 24.84 | i | 26.82 | i | 31.91 | h | 37.59 | i | 43.23 | h | 44.77 | i | 43.71 | j | 35.00 | l | 30.71 | j | 24.84 | k | 25.05 | k | ----- | z |
1988 | 19.22 | m | 19.40 | i | 22.39 | h | 32.40 | j | 34.20 | k | 42.86 | h | 45.20 | k | 42.96 | h | 32.90 | j | 31.60 | k | 27.28 | l | 16.71 | j | ----- | z |
1989 | 17.70 | k | 14.89 | i | 26.65 | h | 33.15 | j | 34.95 | i | 42.27 | h | 43.05 | k | 42.58 | g | 34.00 | j | 26.71 | j | 18.45 | j | 15.55 | k | ----- | z |
1990 | 18.57 | j | 12.00 | j | 23.41 | i | 32.05 | i | 31.29 | g | 38.14 | i | 46.76 | j | 43.57 | h | 34.67 | l | 26.35 | k | 20.41 | m | 8.45 | i | ----- | z |
1991 | 14.35 | k | 22.42 | i | 20.33 | j | 26.29 | m | 31.00 | k | 35.35 | j | 46.50 | c | 43.65 | 35.37 | 27.71 | g | 23.25 | j | 17.25 | g | 41.84 | i | ||
1992 | 17.48 | j | 24.63 | j | 27.10 | j | 30.95 | i | 35.25 | k | 41.42 | f | 44.00 | j | 39.67 | j | 32.00 | i | 28.05 | j | 25.05 | k | 22.95 | j | ----- | z |
1993 | 18.78 | m | 23.74 | i | 33.85 | k | 30.76 | i | 39.19 | j | 41.00 | g | 43.81 | j | 46.22 | h | 37.90 | j | 32.05 | k | 16.83 | f | 25.52 | h | ----- | z |
1994 | 24.39 | m | 24.83 | j | 26.87 | h | 31.45 | j | 40.74 | l | 40.75 | j | 50.30 | k | 44.91 | i | 40.25 | j | 27.84 | l | 21.10 | j | 22.00 | k | ----- | z |
1995 | 29.10 | k | 27.37 | i | 29.48 | h | 31.25 | j | 35.72 | m | 40.24 | i | 47.00 | k | 44.74 | h | 42.29 | i | 29.27 | i | 31.77 | h | 35.57 | q | ----- | z |
1996 | 28.47 | n | 30.80 | i | 28.36 | i | 32.86 | h | 37.91 | i | 44.10 | a | 52.86 | c | 47.79 | g | 38.54 | f | 33.86 | b | 30.58 | k | 28.53 | l | 43.61 | i |
1997 | 25.29 | j | 24.89 | i | 29.14 | j | 30.67 | i | 40.71 | j | 43.17 | f | 49.36 | i | 50.32 | i | 43.19 | d | 33.23 | i | 33.68 | k | 23.86 | j | 43.19 | k |
1998 | 28.45 | k | 30.26 | i | 29.91 | i | 33.57 | i | 37.05 | k | 44.42 | k | 50.73 | i | 48.15 | k | 42.29 | i | 29.52 | j | 31.52 | i | 20.86 | j | ----- | z |
1999 | 22.58 | l | 25.16 | i | 26.91 | h | 28.23 | h | 34.95 | k | 39.95 | h | 43.19 | j | 46.62 | j | 37.43 | i | 30.25 | k | 32.35 | j | 23.10 | j | ----- | z |
2000 | 25.80 | k | 28.53 | j | 27.26 | h | 34.70 | j | 37.05 | j | 44.55 | h | 46.40 | k | 46.35 | h | 39.80 | j | 29.38 | j | 23.62 | i | 24.60 | k | ----- | z |
2001 | 20.71 | j | 20.26 | i | 27.67 | j | 28.95 | i | 38.00 | i | 41.48 | i | 45.70 | k | 45.35 | h | 36.50 | l | 31.09 | i | 27.10 | i | 27.00 | k | ----- | z |
2002 | 23.19 | j | 24.21 | i | 25.14 | j | 32.91 | h | 36.50 | i | 45.20 | j | 50.24 | j | 44.95 | i | 38.85 | j | 25.55 | i | 27.53 | k | 28.38 | j | ----- | z |
2003 | 33.29 | j | 24.58 | i | 30.29 | j | 32.00 | h | 38.33 | j | 45.29 | i | 52.27 | i | 49.90 | k | 39.67 | i | 33.05 | i | 24.44 | l | 31.14 | j | ----- | z |
2004 | 26.58 | l | 26.58 | j | 31.13 | h | 33.55 | h | 39.00 | j | 44.90 | j | 51.90 | j | 49.55 | i | 37.57 | i | 33.58 | l | 26.50 | j | 26.38 | j | ----- | z |
2005 | 21.30 | k | 24.16 | i | 27.91 | h | 31.38 | i | 39.95 | j | 42.00 | h | 50.65 | k | 48.74 | h | 37.48 | i | 29.95 | k | 28.35 | j | 28.40 | k | ----- | z |
2006 | 28.50 | k | 24.17 | j | 25.90 | j | 33.95 | j | 40.41 | i | 47.41 | h | 53.20 | k | 46.13 | h | 38.42 | k | 28.48 | j | 30.65 | j | 24.90 | k | ----- | z |
2007 | 17.80 | k | 24.42 | i | 26.59 | i | 30.71 | i | 38.86 | i | 43.76 | i | 53.45 | k | 47.26 | h | 38.68 | k | 32.67 | j | 26.00 | j | 26.16 | l | ----- | z |
2008 | 17.94 | o | 20.32 | j | 25.76 | j | 26.42 | f | 38.29 | j | 40.95 | i | 49.00 | i | 48.33 | j | 38.05 | i | 31.91 | i | 30.28 | l | 18.86 | j | ----- | z |
2009 | 22.00 | k | 22.63 | i | 24.09 | i | 30.05 | h | 37.60 | k | 45.95 | i | 47.65 | k | 43.50 | q | 38.06 | n | 28.76 | n | 23.25 | r | 19.93 | q | ----- | z |
2010 | 29.60 | p | 25.86 | n | 25.00 | m | 28.72 | l | 30.50 | o | 40.06 | n | 47.94 | m | 45.06 | m | 37.35 | m | 28.94 | o | 25.31 | q | 27.53 | n | ----- | z |
2011 | 21.00 | p | 20.20 | m | 28.00 | l | 26.89 | l | 30.88 | n | 38.82 | m | 46.12 | o | 45.33 | m | 36.94 | m | 27.40 | p | 21.75 | n | 14.53 | n | ----- | z |
2012 | 19.81 | o | 20.38 | m | 24.61 | m | 30.50 | n | 33.56 | m | 38.88 | m | 46.60 | p | 45.89 | l | 36.60 | o | 29.71 | n | 27.86 | h | 19.65 | h | ----- | z |
2013 | 13.81 | o | 17.33 | m | 24.06 | o | 26.59 | m | 34.11 | m | 40.81 | n | 49.27 | p | 44.41 | n | 36.20 | o | 23.11 | v | 21.86 | p | 5.40 | p | ----- | z |
2014 | 14.44 | o | 23.40 | m | 26.05 | l | 28.89 | l | 36.71 | n | 43.19 | n | 54.28 | m | 49.11 | m | 38.53 | m | 30.00 | m | 28.00 | o | 30.56 | o | ----- | z |
2015 | 23.33 | p | 26.53 | m | 26.59 | n | 26.89 | k | 36.53 | p | 44.06 | m | 47.83 | m | 44.00 | o | 36.75 | n | 32.50 | o | 24.17 | r | 24.56 | m | ----- | z |
2016 | 26.13 | p | 26.40 | n | 28.26 | l | 33.41 | m | 43.44 | o | 54.44 | l | 50.06 | o | 46.94 | m | 37.35 | m | 32.89 | l | 27.89 | l | 21.12 | n | ----- | z |
2017 | 17.87 | p | 26.47 | m | 29.40 | k | 30.67 | l | 38.42 | l | 46.28 | l | 49.43 | q | 49.21 | l | 39.50 | n | 24.19 | o | 26.88 | n | 16.12 | o | ----- | z |
2018 | 27.50 | o | 16.00 | m | 25.41 | n | 29.36 | p | 40.39 | m | 42.82 | m | 51.13 | p | 46.68 | l | 34.60 | o | 28.59 | n | 20.33 | o | 24.09 | t | ----- | z |
2019 | ----- | z | 21.50 | n | 25.59 | n | 34.88 | m | 37.61 | m | 42.24 | m | 47.94 | o | 48.00 | n | 36.13 | o | 19.94 | n | 17.07 | o | 29.57 | q | ----- | z |
2020 | 26.81 | o | 21.47 | n | 26.46 | r | 37.50 | t | 41.20 | p | 48.42 | k | 51.93 | p | 52.50 | s | 43.38 | n | 32.20 | p | 27.92 | r | 24.92 | r | ----- | z |
2021 | 30.80 | u | ----- | z | 30.33 | y | 31.20 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.70 | t | 53.83 | s | ----- | z | ----- | z | ----- | z | 21.43 | w | 24.56 | o | ----- | z |
2023 | 26.08 | r | 20.00 | n | 22.41 | n | 30.00 | p | 41.75 | o | 46.62 | n | 52.79 | q | 53.94 | m | 41.06 | n | 30.88 | o | 28.07 | o | 32.73 | p | ----- | z |
2024 | 32.88 | o | 29.73 | n | 28.12 | n | 33.33 | o | 31.67 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.97 | 26.37 | 28.58 | 31.98 | 37.25 | 43.35 | 47.84 | 45.74 | 38.85 | 32.38 | 27.73 | 26.05 | 34.13 | |||||||||||||
S.D. | 6.71 | 3.74 | 2.30 | 2.08 | 1.79 | 2.35 | 2.03 | 2.35 | 2.52 | 2.64 | 4.90 | 4.39 | 1.36 | |||||||||||||
SKEW | -1.55 | 0.29 | 0.60 | -0.39 | 0.09 | 0.38 | 0.18 | 0.14 | -0.30 | -0.13 | -0.87 | -1.03 | 0.56 | |||||||||||||
MAX | 32.52 | 34.93 | 33.81 | 36.70 | 41.26 | 49.40 | 52.86 | 51.52 | 43.19 | 38.13 | 36.13 | 34.13 | 37.71 | |||||||||||||
MIN | 0.45 | 18.60 | 24.42 | 26.27 | 33.71 | 39.03 | 43.48 | 39.84 | 33.10 | 25.86 | 15.77 | 11.81 | 31.71 | |||||||||||||
YRS | 34 | 36 | 36 | 36 | 39 | 47 | 49 | 47 | 47 | 39 | 33 | 35 | 26 |