YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | 41.64 | 49.61 | 50.33 | 63.71 | 71.47 | 85.52 | 81.19 | 72.57 | 60.29 | 47.83 | 41.77 | 60.54 | a | |||||||||||
1938 | 40.23 | 37.25 | 37.71 | 52.22 | c | 62.73 | a | 73.03 | a | 82.90 | 83.73 | a | 77.03 | 59.03 | 44.67 | 40.94 | 57.62 | |||||||||
1939 | 39.45 | 39.93 | a | 50.97 | 62.37 | 66.57 | a | 71.23 | 84.74 | 85.58 | 74.47 | 61.48 | 56.20 | 41.94 | 61.24 | |||||||||||
1940 | 41.19 | 41.17 | 50.39 | 60.83 | 74.26 | 83.10 | a | 81.14 | j | 87.19 | 69.44 | c | 60.81 | e | 44.60 | o | 38.77 | 60.72 | b | |||||||
1941 | 39.52 | 44.25 | 53.32 | 55.33 | 63.10 | 67.20 | 83.65 | 75.39 | 64.47 | 57.23 | 49.90 | 37.74 | 57.59 | |||||||||||||
1942 | 38.35 | 39.25 | 46.74 | 54.57 | 58.71 | 70.07 | 84.35 | 84.10 | 76.17 | 64.58 | 42.57 | 39.32 | 58.23 | |||||||||||||
1943 | 37.48 | 43.54 | 47.03 | 57.20 | 61.29 | 64.27 | 82.97 | 78.55 | 81.67 | 57.26 | 49.50 | 40.84 | 58.47 | |||||||||||||
1944 | 37.32 | 39.10 | 47.39 | 51.77 | 65.00 | 67.03 | 80.26 | 80.35 | 74.93 | 66.97 | 43.62 | a | 38.61 | 57.70 | ||||||||||||
1945 | 40.61 | 41.68 | 43.28 | b | 50.62 | i | 60.53 | a | 72.46 | b | 87.03 | 83.94 | 73.80 | 65.71 | 40.37 | 34.74 | 58.56 | a | ||||||||
1946 | 37.81 | 39.82 | 45.29 | 58.43 | 67.13 | 69.70 | 82.61 | 84.35 | 71.50 | 53.17 | a | 41.83 | 42.00 | 57.80 | ||||||||||||
1947 | 39.45 | 47.21 | 51.74 | 58.83 | 72.55 | 65.63 | 78.32 | 79.10 | 75.50 | 59.70 | a | 42.63 | 40.61 | 59.27 | ||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.97 | a | 75.29 | 68.57 | 60.48 | 44.07 | 31.94 | 59.72 | f | |||||
1949 | 32.61 | 37.29 | 43.45 | 60.67 | 65.16 | 75.62 | a | 83.39 | 80.81 | 74.27 | 56.06 | 54.43 | 35.71 | 58.29 | ||||||||||||
1950 | 29.37 | l | ----- | z | ----- | z | ----- | z | 77.57 | x | 74.13 | 85.55 | 85.16 | 75.10 | 59.43 | a | 51.57 | 49.94 | 68.70 | e | ||||||
1951 | 42.03 | 48.21 | 50.74 | 67.33 | ----- | z | 83.17 | 85.75 | w | 78.00 | r | 77.17 | 55.68 | 44.93 | 34.58 | 55.98 | c | |||||||||
1952 | 30.84 | 39.93 | 41.58 | 59.27 | 65.35 | 67.93 | 85.19 | 81.58 | 80.40 | 71.90 | 46.83 | 36.10 | 58.91 | |||||||||||||
1953 | 41.65 | 45.68 | 46.16 | 53.07 | a | 54.97 | 64.80 | 84.94 | 75.94 | 79.57 | 61.23 | 47.27 | 41.35 | 58.05 | ||||||||||||
1954 | 36.06 | 48.82 | 45.00 | 57.67 | 70.61 | 68.38 | a | 82.58 | 73.42 | 70.68 | b | 61.27 | a | 52.52 | a | 40.19 | 58.93 | |||||||||
1955 | 37.90 | 42.25 | 44.48 | 45.80 | 62.68 | 74.86 | a | 77.20 | a | 84.10 | 72.73 | 62.00 | a | 41.87 | 35.71 | 56.80 | ||||||||||
1956 | 35.57 | a | 36.34 | 45.97 | 57.67 | 65.58 | 68.52 | a | 81.65 | 76.57 | a | 72.77 | 54.97 | 48.63 | 43.19 | 57.28 | ||||||||||
1957 | 30.45 | 44.18 | 44.42 | 54.50 | 63.29 | 74.77 | 77.58 | 75.19 | 74.30 | 51.90 | 43.53 | 40.00 | 56.18 | |||||||||||||
1958 | 37.39 | 40.93 | 41.52 | 50.55 | a | 71.30 | a | 69.86 | a | 82.86 | b | 84.32 | 69.93 | 65.35 | 47.17 | 43.81 | 58.75 | |||||||||
1959 | 38.55 | 39.39 | 48.65 | 60.60 | 59.52 | 72.52 | a | 85.55 | 78.69 | b | 65.13 | 62.13 | 54.00 | 40.35 | 58.76 | |||||||||||
1960 | 33.13 | 39.21 | 46.50 | a | 53.27 | 59.00 | a | 77.67 | 86.35 | 77.94 | 76.03 | 61.94 | 42.00 | 40.71 | 57.81 | |||||||||||
1961 | 42.16 | 40.50 | 43.26 | 56.43 | 61.29 | 80.70 | 84.55 | 83.03 | 69.27 | 59.84 | 44.03 | 37.13 | 58.52 | |||||||||||||
1962 | 39.06 | 38.64 | 42.23 | 61.43 | 57.10 | 73.63 | 81.10 | 75.74 | 75.80 | 59.97 | 48.00 | 41.87 | 57.88 | |||||||||||||
1963 | 41.68 | 48.46 | 45.65 | 45.70 | 65.29 | 69.67 | 76.48 | 78.74 | 75.23 | 58.65 | 41.47 | 41.52 | 57.38 | |||||||||||||
1964 | 35.23 | 44.17 | ----- | z | 52.40 | 61.65 | 68.67 | 81.52 | 79.55 | 73.33 | 66.16 | 40.33 | 34.26 | 57.93 | a | |||||||||||
1965 | 37.10 | 45.41 | a | 50.39 | 54.60 | 63.06 | 73.70 | 82.16 | 77.23 | 69.76 | a | 68.19 | 44.67 | 36.57 | a | 58.57 | ||||||||||
1966 | 36.06 | 39.64 | 46.77 | 60.13 | 69.97 | 70.28 | a | 78.68 | 81.97 | 74.70 | 63.45 | 44.27 | 38.00 | 58.66 | ||||||||||||
1967 | 38.21 | b | 46.36 | 41.32 | 43.33 | 66.65 | 74.33 | 85.55 | 88.03 | 80.29 | b | 60.90 | b | 49.13 | 35.00 | d | 59.09 | |||||||||
1968 | 37.29 | 43.79 | a | 48.65 | 54.27 | 63.13 | 74.69 | a | 84.84 | 72.48 | 72.96 | b | 59.30 | a | 41.45 | a | 33.16 | 57.17 | ||||||||
1969 | 32.13 | a | 35.75 | 46.45 | 52.34 | a | 69.81 | 72.54 | b | 80.19 | 80.71 | 72.48 | a | 53.90 | 52.07 | 38.71 | 57.26 | |||||||||
1970 | 35.74 | 45.04 | 45.87 | 47.10 | 66.43 | a | 74.17 | 83.48 | 84.48 | 69.30 | 58.39 | 42.57 | 32.10 | 57.06 | ||||||||||||
1971 | 38.52 | 41.39 | 41.13 | a | 51.10 | 63.13 | 68.93 | 82.90 | 84.68 | 69.50 | 57.16 | 42.73 | 31.42 | 56.05 | ||||||||||||
1972 | 33.58 | 39.76 | 48.55 | 49.93 | 67.77 | 75.57 | 83.55 | 83.13 | a | 67.70 | 58.73 | a | 37.15 | c | 30.39 | 56.32 | ||||||||||
1973 | 30.26 | 40.29 | 43.35 | 56.36 | b | 69.16 | 74.17 | 84.10 | 81.23 | 72.50 | 57.84 | 36.62 | a | 35.84 | 56.81 | |||||||||||
1974 | 32.45 | 38.32 | 43.26 | 50.10 | 59.90 | 78.53 | 81.19 | 83.61 | 81.21 | a | 66.77 | 46.27 | 36.26 | 58.16 | ||||||||||||
1975 | 38.45 | 37.85 | a | 40.45 | 45.50 | 63.39 | 69.63 | 80.94 | 75.35 | 78.67 | 53.10 | a | 41.30 | 38.55 | 55.27 | |||||||||||
1976 | 39.06 | 40.21 | 45.16 | 48.17 | 68.55 | 68.77 | 80.61 | 72.29 | 75.20 | 65.71 | 51.40 | 41.00 | 58.01 | |||||||||||||
1977 | 37.06 | 46.61 | 43.00 | 62.72 | a | 54.87 | 78.07 | 80.97 | a | 82.42 | 67.43 | 62.52 | 43.24 | a | 37.97 | 58.07 | ||||||||||
1978 | 38.32 | 40.82 | 53.28 | b | 50.04 | b | 61.42 | 72.83 | 80.55 | b | 76.77 | 65.17 | a | 68.81 | 42.76 | a | 33.10 | 56.99 | ||||||||
1979 | 33.39 | 37.54 | 48.39 | 51.10 | 67.47 | a | 74.87 | 81.29 | 75.97 | 77.37 | 62.13 | a | 42.07 | 38.60 | a | 57.51 | ||||||||||
1980 | 35.93 | a | 42.21 | 44.97 | 56.28 | a | 61.77 | a | 64.73 | 81.81 | 78.81 | 74.57 | 63.67 | a | 46.34 | a | 40.84 | 57.66 | ||||||||
1981 | 41.58 | 43.60 | c | 49.27 | a | 59.03 | 61.73 | a | 75.56 | c | 82.26 | 85.23 | 74.40 | 57.90 | a | 46.13 | 37.36 | c | 59.50 | |||||||
1982 | 34.66 | b | 40.25 | 43.75 | o | 48.89 | k | 66.61 | m | 73.23 | h | 79.31 | b | 81.50 | k | 68.94 | m | 59.95 | j | 40.75 | j | 36.47 | l | 51.41 | i | |
1983 | 41.43 | j | 38.94 | j | 43.57 | j | 49.76 | i | 68.37 | l | 68.00 | h | 79.11 | l | 79.32 | 72.96 | f | 63.95 | j | 42.88 | n | 37.50 | k | 79.32 | k | |
1984 | 41.94 | m | 44.20 | n | 50.45 | k | 48.28 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.91 | t | 40.14 | b | 35.78 | h | 40.14 | k |
1985 | 43.90 | 45.04 | b | 46.50 | a | 58.86 | i | 67.62 | b | 78.29 | f | 87.93 | a | 77.93 | a | 65.29 | b | 63.80 | f | 45.08 | r | 47.94 | m | 62.03 | e | |
1986 | 42.57 | q | 46.69 | l | 55.73 | p | 58.21 | k | 67.00 | m | 81.36 | e | 80.68 | c | 88.81 | e | 67.54 | f | 68.00 | k | 44.64 | p | 40.88 | o | 83.62 | i |
1987 | 39.11 | m | 46.12 | l | 49.53 | l | 70.90 | i | 71.72 | f | 79.93 | c | 77.23 | 84.90 | a | ----- | z | 75.93 | a | 54.53 | k | 39.06 | n | 79.50 | h | |
1988 | 41.42 | s | 51.50 | s | 54.93 | q | 59.64 | s | 63.67 | p | 72.39 | l | 87.62 | e | 87.43 | a | 79.39 | b | 76.52 | b | 42.96 | g | 38.76 | j | 82.74 | h |
1989 | 42.76 | n | 37.83 | j | 47.15 | k | 63.42 | k | 63.09 | i | 77.40 | e | 81.34 | b | 78.47 | a | 75.57 | 62.81 | d | 52.95 | k | 48.00 | n | 75.12 | g | |
1990 | 41.71 | n | 39.53 | i | 51.94 | o | 65.65 | m | ----- | z | 72.78 | g | 86.25 | c | 80.58 | 79.53 | 62.39 | c | ----- | z | ----- | z | 77.19 | h | ||
1991 | 41.12 | n | ----- | z | 43.79 | q | 51.05 | k | ----- | z | ----- | z | 86.09 | h | 84.00 | i | 83.73 | h | 68.14 | i | 48.43 | p | 40.80 | p | ----- | z |
1992 | ----- | z | 50.64 | r | ----- | z | ----- | z | 77.35 | h | 76.28 | e | ----- | z | 84.69 | r | 79.75 | v | ----- | z | ----- | z | 31.25 | s | 76.28 | k |
1993 | 31.88 | w | 36.17 | p | 46.89 | m | 53.13 | o | 67.56 | m | 68.18 | m | 71.50 | m | 78.14 | c | 76.20 | 64.86 | c | 42.63 | c | 35.17 | m | 65.46 | h | |
1994 | 40.60 | k | 39.94 | j | 55.05 | k | 53.10 | t | 62.89 | v | 69.96 | g | 89.47 | n | 83.86 | x | 81.55 | j | 59.00 | c | 36.96 | c | 31.83 | y | 47.98 | j |
1995 | 36.38 | w | 47.59 | k | 45.11 | m | 54.78 | l | 61.15 | d | 71.70 | c | 80.33 | d | 81.22 | d | ----- | z | 62.23 | a | 51.34 | a | 40.72 | m | 68.00 | f |
1996 | 37.77 | 42.86 | 50.55 | 55.68 | b | 59.23 | a | 74.53 | 85.81 | 83.45 | 71.07 | 58.06 | 46.10 | 36.06 | 58.43 | |||||||||||
1997 | 36.03 | 40.54 | 49.03 | 52.33 | 70.63 | a | 69.73 | 79.81 | ----- | z | 71.53 | 58.97 | a | 43.53 | 36.55 | 55.34 | a | |||||||||
1998 | 37.48 | 37.54 | 46.52 | 54.03 | 53.52 | 70.07 | a | 85.10 | 85.84 | 78.07 | 61.26 | 39.80 | 34.29 | 56.96 | ||||||||||||
1999 | 38.81 | 35.75 | 42.74 | 50.33 | 60.61 | 70.03 | 81.39 | 77.74 | 77.93 | 66.00 | 47.07 | 40.45 | 57.40 | |||||||||||||
2000 | 36.14 | b | 41.24 | l | 45.83 | h | 58.36 | b | 61.78 | m | 75.86 | h | 80.78 | m | 85.27 | i | 78.71 | p | 59.40 | k | 41.12 | f | 39.72 | f | 47.25 | j |
2001 | 39.43 | a | 39.67 | a | 49.87 | a | 51.24 | a | 74.07 | d | 69.79 | a | 80.17 | a | 86.04 | c | 76.08 | d | 65.27 | a | 44.77 | 36.04 | h | 61.49 | a | |
2002 | 36.10 | 43.64 | 45.19 | 57.68 | b | 62.52 | 75.88 | e | 87.42 | g | 79.52 | f | 75.69 | d | 63.17 | a | 48.10 | a | 39.68 | 54.76 | b | |||||
2003 | 41.33 | d | 43.43 | 47.78 | d | 47.70 | 63.38 | b | 79.74 | c | 88.93 | a | 83.36 | i | 77.96 | g | 66.31 | e | 40.04 | e | 37.39 | 55.60 | b | |||
2004 | 36.80 | a | 39.74 | b | 55.61 | h | 58.69 | d | 63.00 | c | 73.86 | a | 84.38 | b | 78.00 | n | 71.62 | a | 59.48 | b | 45.53 | 41.15 | d | 57.43 | b | |
2005 | 38.48 | 45.07 | 52.17 | b | 52.20 | 61.10 | b | 65.67 | c | 86.16 | f | 84.32 | f | 75.95 | h | 61.50 | c | 43.54 | b | 36.00 | 50.64 | c | ||||
2006 | 36.63 | a | 40.56 | a | 39.79 | c | 53.60 | e | 66.30 | d | 75.82 | b | 88.59 | i | 82.11 | d | 77.64 | e | 64.11 | c | 41.59 | a | 37.81 | 55.99 | a | |
2007 | 38.08 | f | 41.14 | 52.94 | 54.89 | b | 68.59 | d | 74.47 | 85.61 | 83.76 | f | 73.28 | a | 54.50 | c | 49.22 | c | 33.87 | 58.85 | b | |||||
2008 | 32.44 | f | 41.75 | a | 44.58 | 48.82 | h | 63.17 | b | 71.57 | b | 84.93 | d | 83.27 | e | 78.96 | c | 61.04 | g | 47.26 | c | 35.07 | d | 61.17 | c | |
2009 | 42.21 | c | 40.64 | 44.30 | a | 54.43 | 67.30 | a | 71.10 | a | 86.79 | c | 81.06 | 80.08 | d | 55.83 | b | 44.53 | 33.37 | a | 58.47 | |||||
2010 | 39.13 | a | 40.93 | 48.30 | a | 49.53 | 56.48 | 68.17 | 84.26 | 80.90 | 73.18 | b | 61.52 | 41.66 | a | 35.93 | a | 56.67 | ||||||||
2011 | 40.42 | 39.75 | 42.16 | 48.50 | 56.48 | 68.10 | j | 76.94 | m | 84.00 | j | 79.17 | l | 60.21 | b | 41.97 | 41.32 | 46.35 | d | |||||||
2012 | 40.00 | 41.90 | 42.61 | 54.47 | 63.84 | 66.77 | 81.58 | 85.39 | 80.10 | 60.39 | 44.10 | 34.58 | 57.98 | |||||||||||||
2013 | 38.19 | 42.79 | 49.45 | 54.70 | 64.16 | 73.27 | 88.13 | 79.52 | 70.77 | 58.19 | 46.93 | 36.58 | 58.56 | |||||||||||||
2014 | 44.61 | 40.61 | 49.00 | 55.50 | 65.68 | 73.30 | 88.23 | 84.63 | a | 75.27 | 61.77 | a | 43.37 | 37.84 | 59.98 | |||||||||||
2015 | 45.33 | a | 49.75 | 55.65 | 55.73 | 62.86 | b | 80.47 | 80.94 | 82.13 | 73.90 | 66.00 | a | 41.40 | 33.16 | 60.61 | ||||||||||
2016 | 32.48 | 44.59 | b | 41.29 | c | 59.21 | b | 74.81 | j | ----- | z | 81.35 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.79 | g | ||
2017 | ----- | z | ----- | z | 45.63 | a | 49.37 | 61.81 | j | 73.52 | a | 85.29 | c | 86.26 | d | 79.20 | j | 58.77 | i | 42.58 | d | 41.57 | a | 60.60 | e | |
2018 | 42.46 | e | 45.22 | j | 45.32 | i | 53.62 | f | 67.96 | g | 74.41 | h | 86.53 | l | 81.18 | i | 73.13 | 59.84 | 48.20 | 35.84 | l | 55.91 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.80 | 41.71 | 46.34 | 54.26 | 63.94 | 72.73 | 82.87 | 81.05 | 74.02 | 61.41 | 44.99 | 37.86 | 57.97 | |||||||||||||
S.D. | 3.37 | 3.23 | 3.77 | 4.82 | 4.57 | 4.46 | 2.94 | 3.98 | 4.14 | 4.70 | 4.17 | 3.56 | 1.14 | |||||||||||||
SKEW | -0.21 | 0.47 | 0.17 | 0.08 | 0.06 | 0.29 | -0.07 | -0.23 | -0.33 | 0.76 | 0.51 | 0.34 | 0.38 | |||||||||||||
MAX | 45.33 | 49.75 | 55.65 | 67.33 | 74.26 | 83.17 | 88.93 | 88.81 | 81.67 | 76.52 | 56.20 | 49.94 | 61.24 | |||||||||||||
MIN | 30.26 | 35.75 | 37.71 | 43.33 | 53.52 | 64.27 | 76.48 | 72.29 | 64.47 | 51.90 | 36.62 | 30.39 | 55.27 | |||||||||||||
YRS | 64 | 65 | 63 | 63 | 63 | 68 | 68 | 66 | 67 | 71 | 69 | 64 | 47 |