YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.84 | 59.23 | 51.03 | 47.17 | 41.03 | 51.86 | g | |||||
1940 | 40.94 | 39.28 | 42.17 | a | 45.67 | 49.19 | 52.77 | 54.48 | 56.19 | 51.43 | ----- | z | ----- | z | 41.90 | 47.40 | b | |||||||||
1941 | 40.07 | d | 41.68 | 41.39 | 40.87 | 49.39 | 50.07 | 58.19 | 56.32 | 48.07 | 45.90 | b | 43.48 | a | 37.58 | 46.08 | ||||||||||
1942 | 37.97 | 32.79 | 35.03 | 41.73 | 43.35 | 50.30 | 58.26 | 58.19 | 49.17 | 47.03 | 42.17 | 37.77 | 44.48 | |||||||||||||
1943 | 37.74 | 40.07 | 40.87 | 43.33 | 46.97 | 47.80 | 55.45 | 57.94 | 56.50 | 49.52 | 42.90 | 38.42 | 46.46 | |||||||||||||
1944 | 37.10 | 33.38 | 38.68 | 39.17 | 46.45 | 46.90 | 51.00 | 55.90 | 53.03 | 45.77 | 40.07 | 39.48 | 43.91 | |||||||||||||
1945 | 35.81 | 36.11 | 34.29 | 38.47 | 43.48 | 50.03 | 58.35 | 59.32 | 55.93 | 48.74 | 36.80 | 36.16 | 44.46 | |||||||||||||
1946 | 34.74 | 32.29 | 37.65 | 44.97 | 46.35 | 51.33 | 58.77 | 59.16 | 57.47 | 44.29 | 41.17 | 40.35 | 45.71 | |||||||||||||
1947 | 35.10 | 39.54 | 42.10 | 44.63 | 49.03 | 51.73 | 57.39 | 57.10 | 58.27 | 48.32 | 38.03 | 36.97 | 46.52 | |||||||||||||
1948 | 37.94 | 34.14 | 36.29 | 41.33 | 44.87 | 50.13 | 54.48 | 55.03 | 55.43 | 48.65 | 41.37 | 34.35 | 44.50 | |||||||||||||
1949 | 27.61 | 33.54 | 36.10 | 43.63 | 46.23 | 52.00 | 55.23 | 54.48 | 55.47 | 44.94 | 49.37 | 37.58 | 44.68 | |||||||||||||
1950 | 32.77 | 38.39 | 38.16 | 43.73 | 43.58 | 47.77 | 58.19 | 55.32 | 52.90 | 50.48 | 46.13 | 42.94 | 45.86 | |||||||||||||
1951 | 35.77 | 34.93 | 37.90 | 42.37 | 45.68 | 49.17 | 58.16 | 56.26 | 55.30 | 48.45 | 42.47 | 35.68 | 45.18 | |||||||||||||
1952 | 34.74 | 37.24 | 35.55 | 42.23 | 47.52 | 47.17 | 58.48 | 58.84 | 56.43 | 50.77 | 39.23 | 38.23 | 45.54 | |||||||||||||
1953 | 42.00 | 32.82 | 37.10 | 39.47 | 41.39 | 48.40 | 60.55 | 57.40 | f | 48.67 | 43.94 | 42.97 | 38.23 | 43.23 | a | |||||||||||
1954 | 37.48 | 43.21 | 36.74 | 43.80 | 46.35 | 48.90 | 58.32 | 49.10 | 48.73 | 43.97 | 43.93 | 37.74 | 44.86 | |||||||||||||
1955 | 34.03 | 34.39 | 38.57 | a | 36.27 | 44.65 | 48.13 | 52.58 | 59.58 | 53.67 | 46.32 | 41.70 | 38.26 | 44.01 | ||||||||||||
1956 | 38.07 | a | 31.07 | 36.17 | a | 41.07 | 46.84 | 49.23 | 53.52 | 49.74 | 53.20 | 44.52 | 44.47 | 40.45 | 44.03 | |||||||||||
1957 | 37.55 | 42.82 | 40.61 | 41.97 | 46.39 | 55.80 | 58.03 | 58.39 | 53.83 | 48.87 | 39.27 | 42.00 | 47.13 | |||||||||||||
1958 | 37.65 | 40.57 | 36.58 | 42.07 | 48.39 | 50.63 | 55.26 | 60.87 | 57.10 | 53.23 | 42.37 | 44.13 | 47.40 | |||||||||||||
1959 | 38.23 | 35.21 | 39.52 | 44.59 | a | 45.35 | 52.83 | 60.87 | 56.83 | a | 53.87 | 49.45 | 45.20 | 40.68 | 46.89 | |||||||||||
1960 | 32.65 | 34.83 | 40.58 | 40.67 | 44.94 | 51.37 | 58.68 | 55.74 | 56.13 | 46.26 | 38.67 | 35.87 | 44.70 | |||||||||||||
1961 | 41.23 | 35.39 | 38.41 | b | 41.70 | 43.58 | 53.70 | 57.74 | 57.39 | 49.62 | a | 44.65 | 37.90 | a | 35.71 | 44.75 | ||||||||||
1962 | ----- | z | ----- | z | 38.00 | n | 44.47 | 44.71 | 51.13 | 54.87 | 59.06 | 55.80 | 49.03 | 41.47 | 40.87 | 49.05 | c | |||||||||
1963 | 35.74 | 43.36 | 37.70 | a | 38.80 | 47.19 | 51.07 | 55.06 | 57.45 | 58.70 | 50.77 | 43.20 | 37.71 | 46.40 | ||||||||||||
1964 | 35.03 | 34.07 | 35.90 | a | 41.38 | a | 44.00 | 50.89 | b | 58.39 | 60.19 | 52.72 | e | 51.67 | s | 42.41 | a | 40.67 | a | 45.06 | a | |||||
1965 | 39.35 | 36.21 | 40.03 | 41.80 | 46.61 | 48.43 | ----- | z | 60.26 | 51.17 | 52.23 | 44.17 | 40.65 | 45.54 | a | |||||||||||
1966 | 35.81 | 36.04 | a | 41.06 | 44.60 | 49.55 | 53.90 | a | 58.16 | 61.45 | 57.10 | t | 51.23 | 44.47 | 42.65 | 47.17 | a | |||||||||
1967 | 40.19 | 38.86 | 40.35 | 36.13 | 46.74 | l | 49.53 | 62.97 | 65.65 | 59.03 | 52.23 | a | 46.10 | 37.13 | a | 48.02 | a | |||||||||
1968 | 38.06 | 45.36 | a | 39.84 | 42.53 | 47.90 | 53.20 | 60.81 | 58.23 | 56.40 | 50.42 | 42.67 | 37.09 | i | 48.67 | a | ||||||||||
1969 | 42.06 | 37.14 | 38.74 | 43.24 | i | 48.93 | a | 52.50 | 60.55 | 63.19 | 59.80 | 47.00 | 46.73 | 39.65 | 48.75 | a | ||||||||||
1970 | 39.81 | 41.54 | 40.68 | 39.20 | 49.26 | 54.13 | 63.10 | a | 64.10 | 55.93 | 50.42 | 43.00 | l | 38.19 | 48.76 | a | ||||||||||
1971 | 37.53 | a | 39.71 | 40.13 | 40.87 | 45.52 | j | 55.88 | m | 59.84 | 63.55 | 57.93 | 47.23 | 42.50 | 34.68 | 46.40 | b | |||||||||
1972 | 36.17 | a | 39.79 | a | 43.81 | 42.55 | a | 49.40 | a | 55.97 | 61.81 | 60.61 | 55.83 | a | 44.50 | u | 41.57 | 38.10 | 47.78 | a | ||||||
1973 | 35.68 | 39.68 | 37.00 | 41.08 | f | 50.95 | i | 56.60 | 57.90 | 60.16 | 53.30 | 49.40 | a | 40.36 | h | 40.65 | 47.82 | c | ||||||||
1974 | 37.19 | 38.18 | 41.52 | 41.53 | 47.83 | s | 54.63 | 60.19 | 57.77 | 59.63 | 50.48 | 45.03 | 36.74 | 47.54 | a | |||||||||||
1975 | 39.55 | 37.89 | 39.45 | 41.17 | 43.67 | v | 53.00 | 58.23 | 53.58 | 56.90 | 47.58 | 42.00 | 40.87 | 46.38 | a | |||||||||||
1976 | 40.77 | 40.79 | 38.61 | 41.53 | m | 48.71 | 52.50 | 58.71 | 54.61 | 58.60 | 49.58 | 46.67 | 39.71 | 48.12 | a | |||||||||||
1977 | 39.81 | 39.14 | 35.29 | 42.53 | m | 44.68 | 54.73 | 58.55 | 61.26 | 56.63 | k | 51.10 | a | 45.23 | 43.52 | 47.33 | b | |||||||||
1978 | 41.52 | 41.04 | 46.26 | 42.48 | i | 47.00 | d | 54.37 | 58.26 | 57.61 | 56.09 | h | ----- | z | 40.20 | 37.77 | a | 47.11 | c | |||||||
1979 | 37.84 | 38.37 | a | 41.71 | 43.43 | 48.13 | a | 52.47 | 56.13 | 55.94 | 56.80 | 48.42 | 42.53 | ----- | z | 47.43 | a | |||||||||
1980 | 44.32 | 43.07 | 39.65 | 43.77 | 45.32 | 49.80 | 60.97 | 58.52 | ----- | z | 52.26 | 43.76 | a | 45.03 | 47.86 | a | ||||||||||
1981 | 41.32 | 41.61 | 40.90 | 45.40 | 49.84 | 59.17 | 59.19 | 61.06 | 57.17 | 47.97 | 44.53 | 42.55 | 49.23 | |||||||||||||
1982 | 37.61 | 41.89 | 40.84 | 43.63 | 49.13 | 51.37 | 57.71 | 61.00 | 57.57 | 48.94 | 42.37 | 36.87 | 47.41 | |||||||||||||
1983 | 43.32 | 40.59 | a | 43.52 | 40.97 | 48.61 | 52.90 | a | 57.21 | b | 62.27 | a | 61.33 | 53.65 | 43.07 | 41.81 | 49.10 | |||||||||
1984 | 42.29 | 39.03 | 42.13 | 43.27 | 52.32 | 55.00 | 63.81 | 62.68 | 62.97 | 48.23 | 41.37 | 38.19 | 49.27 | |||||||||||||
1985 | 38.83 | a | 39.04 | a | 36.45 | 44.20 | 47.84 | 53.14 | b | 60.43 | a | 55.81 | 52.83 | 49.61 | 41.55 | a | 42.29 | 46.84 | ||||||||
1986 | 45.74 | 41.71 | 43.84 | 44.13 | 49.03 | 54.40 | 57.03 | 61.77 | 50.97 | 48.48 | 45.80 | 40.29 | 48.60 | |||||||||||||
1987 | 37.20 | a | 38.75 | 41.41 | b | 47.67 | 51.48 | 54.47 | 53.81 | 58.16 | 55.18 | b | 53.60 | a | 43.45 | a | 33.90 | a | 47.42 | |||||||
1988 | 40.06 | 41.89 | a | 41.58 | 44.97 | 47.55 | 52.13 | 60.13 | 58.42 | 54.80 | 51.61 | 43.97 | 38.74 | 47.99 | ||||||||||||
1989 | 39.16 | 38.56 | a | 42.65 | 47.20 | 48.48 | 53.40 | 60.32 | 56.65 | 55.40 | 49.23 | 45.97 | 41.65 | 48.22 | ||||||||||||
1990 | 38.84 | 35.79 | 41.97 | a | 46.79 | a | 48.10 | 56.03 | 61.23 | 58.90 | 57.50 | 51.97 | 43.87 | 37.87 | 48.24 | |||||||||||
1991 | 38.65 | 42.48 | a | 37.16 | 43.43 | 45.48 | 50.69 | a | 58.52 | 57.56 | m | 58.40 | 52.97 | 45.10 | 39.90 | 46.62 | a | |||||||||
1992 | 39.87 | a | 42.64 | a | 42.84 | 47.43 | 52.74 | 53.53 | 60.10 | 62.13 | 56.73 | 51.43 | a | 44.60 | 35.97 | a | 49.17 | |||||||||
1993 | 38.84 | 40.32 | 44.27 | a | 45.97 | 51.07 | a | 54.47 | 55.58 | 58.03 | 55.47 | 51.06 | 43.70 | 38.68 | 48.12 | |||||||||||
1994 | 40.39 | 38.54 | 43.13 | 45.00 | 48.23 | 55.97 | 59.23 | 61.26 | 54.48 | e | 46.55 | b | 36.77 | 39.71 | 47.44 | |||||||||||
1995 | 41.29 | 46.04 | 42.55 | 42.17 | 46.42 | 51.07 | 57.65 | 61.29 | 58.70 | 50.13 | 45.23 | 38.94 | 48.46 | |||||||||||||
1996 | 40.48 | 42.31 | 40.68 | 45.30 | 50.26 | 54.13 | 62.29 | 61.81 | 55.63 | 48.10 | 45.68 | b | 41.55 | 49.02 | ||||||||||||
1997 | 41.27 | a | 38.64 | 42.58 | 43.37 | 53.39 | 54.20 | 56.19 | 60.55 | 59.40 | 50.03 | 44.70 | 38.32 | 48.55 | ||||||||||||
1998 | 38.52 | 37.96 | 41.48 | 40.20 | 45.55 | 50.47 | 60.13 | 64.19 | 56.73 | 47.81 | 40.90 | 38.47 | a | 46.87 | ||||||||||||
1999 | 39.71 | 39.57 | 39.10 | 41.20 | 47.58 | 52.31 | a | 58.94 | 58.61 | 57.10 | 52.87 | 45.77 | 40.65 | 47.78 | ||||||||||||
2000 | 42.19 | 41.76 | 40.55 | 44.87 | 50.39 | 54.57 | 56.10 | 59.77 | 54.37 | 48.29 | 39.40 | 42.23 | 47.87 | |||||||||||||
2001 | 36.65 | 38.39 | 42.65 | 41.07 | 50.06 | 53.93 | 57.10 | 61.26 | ----- | z | ----- | z | ----- | z | ----- | z | 47.64 | d | ||||||||
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.31 | q | 41.94 | m | ----- | z |
2004 | 39.10 | j | 37.95 | j | 47.68 | f | 45.81 | d | 49.37 | d | 53.08 | f | 58.57 | c | 57.86 | b | 54.93 | c | 47.57 | h | 39.10 | a | 42.00 | e | 49.66 | e |
2005 | 43.76 | n | ----- | z | ----- | z | 42.50 | x | 55.00 | p | 55.31 | n | 65.50 | w | 62.28 | m | 52.00 | s | 53.31 | o | 55.50 | r | 45.33 | g | ----- | z |
2006 | 42.00 | l | 43.36 | f | 37.50 | i | 43.35 | j | 51.17 | g | 63.20 | j | 69.32 | i | 61.76 | j | 59.87 | g | 50.95 | l | 47.57 | i | 39.82 | i | ----- | z |
2007 | 40.22 | h | 40.95 | h | 43.25 | g | 46.71 | p | 49.27 | i | 56.82 | h | 65.21 | g | 64.69 | e | 57.33 | l | 53.72 | f | 51.00 | j | 39.55 | i | 64.69 | k |
2008 | 41.22 | h | 41.38 | 44.68 | 46.38 | a | 49.71 | 58.64 | b | 64.19 | 64.55 | 61.53 | 56.43 | a | 51.89 | c | 41.84 | 52.84 | a | |||||||
2009 | 47.58 | 42.57 | 42.48 | 45.52 | c | 55.97 | 55.73 | 66.23 | a | 63.39 | 65.07 | 52.60 | a | 49.30 | 42.52 | 52.41 | ||||||||||
2010 | 44.74 | 43.57 | 44.65 | 44.33 | 48.32 | 55.87 | 62.61 | 63.13 | a | ----- | z | ----- | z | ----- | z | ----- | z | 50.90 | d | |||||||
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.70 | 38.89 | 40.03 | 42.89 | 47.68 | 52.38 | 58.47 | 59.11 | 55.77 | 49.27 | 43.15 | 39.38 | 46.87 | |||||||||||||
S.D. | 3.29 | 3.39 | 2.76 | 2.54 | 2.69 | 2.74 | 2.85 | 3.30 | 3.42 | 2.71 | 2.97 | 2.50 | 1.89 | |||||||||||||
SKEW | -0.20 | -0.30 | -0.12 | -0.42 | 0.35 | 0.06 | 0.03 | -0.50 | -0.09 | -0.02 | 0.15 | -0.04 | 0.35 | |||||||||||||
MAX | 47.58 | 46.04 | 46.26 | 47.67 | 55.97 | 59.17 | 66.23 | 65.65 | 65.07 | 56.43 | 51.89 | 45.03 | 52.41 | |||||||||||||
MIN | 27.61 | 31.07 | 34.29 | 36.13 | 41.39 | 46.90 | 51.00 | 49.10 | 48.07 | 43.94 | 36.77 | 33.90 | 43.91 | |||||||||||||
YRS | 63 | 64 | 64 | 61 | 61 | 64 | 65 | 66 | 61 | 60 | 62 | 63 | 41 |