YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | 50.00 | g | 58.03 | 69.97 | 76.00 | a | 75.00 | 65.80 | 55.00 | 42.14 | a | 38.61 | 60.07 | d | ||||||
1962 | 38.45 | 42.11 | 38.23 | 52.47 | 56.45 | 64.67 | 74.48 | 73.27 | a | 70.28 | a | 56.13 | 45.97 | 41.97 | 54.54 | |||||||||||
1963 | 32.74 | 44.18 | 43.61 | 47.93 | 60.39 | 63.93 | 76.90 | 73.29 | 70.21 | k | 58.07 | b | 46.30 | 35.29 | 52.97 | a | ||||||||||
1964 | 32.03 | 31.93 | 41.19 | 49.93 | 56.26 | 66.17 | 77.42 | 72.87 | 66.53 | 57.61 | 39.43 | 37.77 | 52.43 | |||||||||||||
1965 | 39.06 | 36.18 | 38.90 | 48.43 | 54.00 | 60.53 | 74.39 | 71.10 | 62.60 | 54.52 | 47.07 | 41.55 | 52.36 | |||||||||||||
1966 | 33.90 | 35.39 | 43.61 | 50.67 | 61.00 | 66.43 | 75.65 | 73.87 | 68.33 | 52.23 | 43.47 | 38.39 | 53.58 | |||||||||||||
1967 | 33.19 | 36.96 | 43.29 | 44.33 | 55.29 | 63.97 | 76.03 | 74.97 | 68.63 | 53.81 | 46.87 | 34.81 | 52.68 | |||||||||||||
1968 | 37.55 | 45.93 | 44.71 | 49.53 | 56.74 | 65.30 | 72.29 | 68.84 | 65.23 | 52.58 | 42.43 | 32.19 | 52.78 | |||||||||||||
1969 | 41.58 | 37.21 | 37.84 | 47.70 | 57.42 | 63.70 | 75.39 | 76.94 | 67.23 | 50.35 | 47.23 | 39.71 | 53.53 | |||||||||||||
1970 | 34.71 | 42.43 | 42.16 | 44.83 | a | 59.03 | 66.97 | 75.87 | 75.77 | 64.23 | 48.58 | 41.10 | 34.26 | 52.50 | ||||||||||||
1971 | 33.03 | 35.71 | 41.23 | 46.13 | 53.55 | 63.13 | 75.29 | 72.68 | 66.33 | 49.00 | 42.66 | a | 42.17 | y | 52.61 | a | ||||||||||
1972 | 33.16 | l | 37.90 | 47.06 | 48.93 | 58.13 | 70.43 | 76.77 | 74.00 | 68.77 | 58.23 | 41.43 | 35.29 | 56.09 | a | |||||||||||
1973 | 35.23 | 41.81 | a | 41.81 | 48.27 | 59.65 | 66.14 | a | 72.97 | 70.90 | 58.53 | 47.26 | ----- | z | 34.90 | j | 54.26 | b | ||||||||
1974 | 36.39 | 33.61 | 44.19 | 47.43 | 58.68 | 70.37 | 74.35 | 69.90 | 67.53 | 58.74 | 41.43 | 30.55 | 52.77 | |||||||||||||
1975 | 32.52 | 36.04 | 40.87 | 44.03 | a | 53.61 | 63.40 | 75.87 | 73.16 | 69.72 | a | 53.45 | 41.03 | 40.00 | 51.98 | |||||||||||
1976 | 37.55 | 43.31 | 41.60 | a | 47.70 | 60.45 | 66.07 | 76.42 | 72.26 | 67.87 | 56.03 | b | 45.89 | c | 37.71 | 54.40 | ||||||||||
1977 | 38.58 | 38.54 | 40.16 | 52.40 | 56.13 | 68.90 | 77.16 | 76.29 | 69.30 | 61.13 | 45.50 | 41.19 | 55.44 | |||||||||||||
1978 | 40.69 | b | 43.89 | ----- | z | 48.77 | 57.42 | 67.87 | 74.77 | 72.40 | a | 69.90 | 58.77 | 45.63 | 35.46 | e | 55.96 | a | ||||||||
1979 | 36.32 | 37.50 | b | 43.42 | 48.59 | a | 57.97 | 67.32 | b | 74.00 | 70.37 | a | 71.48 | a | 54.73 | a | 41.44 | c | 40.52 | 53.64 | ||||||
1980 | 43.65 | 45.39 | a | 43.68 | 49.77 | 55.81 | 66.63 | 77.03 | 71.74 | 67.53 | 57.00 | 44.57 | 44.84 | 55.64 | ||||||||||||
1981 | 43.19 | 42.00 | 46.18 | c | 56.93 | 61.32 | 73.73 | 77.42 | 77.33 | a | 70.30 | 56.04 | d | 41.80 | y | 39.47 | a | 58.54 | a | |||||||
1982 | 38.00 | a | 42.32 | 44.39 | 50.43 | b | 59.10 | 64.70 | 75.83 | a | 77.43 | a | 68.85 | c | 52.20 | a | 45.56 | c | 38.28 | b | 54.76 | |||||
1983 | 39.69 | b | 42.48 | a | 45.19 | d | 46.80 | 57.42 | 65.00 | 75.39 | 73.67 | a | 72.67 | 59.55 | b | 43.83 | 41.74 | d | 55.29 | |||||||
1984 | 40.53 | a | 38.30 | b | 44.10 | b | 50.67 | 63.59 | b | 68.17 | 75.32 | 73.47 | a | 70.27 | 51.00 | a | 40.79 | a | 38.30 | a | 54.54 | |||||
1985 | 38.53 | a | 36.74 | a | 42.60 | a | 51.07 | 59.34 | b | 67.23 | 73.65 | ----- | z | 59.48 | a | 52.94 | 38.40 | 35.04 | c | 50.46 | a | |||||
1986 | 38.45 | 37.88 | b | 45.55 | b | 48.76 | a | 55.84 | 66.63 | 68.93 | a | 71.41 | b | 57.43 | 48.70 | a | 39.55 | a | 34.65 | 51.15 | ||||||
1987 | 32.10 | b | 36.68 | 38.10 | a | 50.47 | 54.81 | 63.20 | 66.57 | a | 67.81 | 59.63 | 51.59 | b | 37.21 | b | 31.00 | e | 49.10 | |||||||
1988 | 34.15 | e | 35.35 | c | 37.58 | 45.93 | 52.13 | 62.57 | 70.17 | b | 68.35 | 58.68 | b | 54.17 | a | 38.25 | b | 37.38 | b | 49.56 | ||||||
1989 | 38.13 | a | 40.92 | c | 46.79 | c | 56.14 | b | 58.69 | b | 64.77 | 72.94 | 69.10 | 63.59 | a | 50.94 | 39.37 | 30.87 | a | 52.69 | ||||||
1990 | 30.37 | a | 35.29 | 46.52 | d | 54.93 | a | 59.52 | 71.00 | 74.77 | a | 70.10 | a | 67.07 | a | 55.04 | c | 43.10 | a | 33.71 | 53.45 | |||||
1991 | 34.13 | a | 41.85 | a | 38.41 | b | 43.66 | a | 52.07 | a | 58.20 | 69.20 | a | 71.23 | 67.17 | 56.80 | a | 43.24 | a | 40.43 | a | 51.37 | ||||
1992 | 38.63 | a | 42.10 | 43.62 | b | 50.60 | 59.10 | a | 64.76 | a | 71.81 | 71.73 | a | 63.66 | a | 52.29 | 36.87 | 35.29 | 52.54 | |||||||
1993 | 43.23 | 43.61 | 45.23 | 48.72 | a | 60.06 | 66.33 | 72.68 | 73.06 | 65.83 | 58.17 | a | 42.00 | 36.46 | c | 54.62 | ||||||||||
1994 | 34.97 | b | 38.71 | 46.96 | c | 52.63 | 57.79 | c | 69.21 | a | 73.48 | f | 76.50 | a | 66.96 | c | 53.56 | d | 40.47 | k | 37.62 | j | 55.25 | c | ||
1995 | 39.48 | f | 45.28 | j | 43.86 | i | 45.44 | l | 54.07 | p | 61.60 | o | 71.00 | l | 73.70 | k | 68.11 | l | 51.76 | j | 45.38 | q | 37.50 | m | ----- | z |
1996 | 34.10 | k | 44.74 | j | 45.37 | l | 51.09 | h | 61.35 | k | 70.58 | k | 76.25 | k | 75.05 | l | 65.54 | f | 55.16 | 46.13 | 37.84 | 46.38 | i | |||
1997 | 41.42 | 39.25 | 47.52 | 51.03 | 64.58 | 65.90 | 73.39 | 75.59 | b | 71.86 | a | 54.13 | 44.55 | a | 38.10 | a | 55.61 | |||||||||
1998 | 39.29 | 39.14 | 44.11 | c | 45.20 | 54.10 | a | 61.83 | a | 75.19 | 77.13 | 69.25 | b | 53.32 | 41.66 | a | 40.68 | f | 54.57 | a | ||||||
1999 | 39.86 | c | 48.48 | e | 51.10 | a | 47.62 | a | 57.33 | a | 67.81 | d | 75.77 | a | 73.97 | b | 67.34 | a | 56.10 | 44.69 | a | 34.39 | 55.37 | |||
2000 | 37.21 | c | 40.00 | b | 44.40 | a | 51.60 | 61.87 | 71.62 | a | 75.50 | a | 75.55 | 71.28 | a | 57.61 | 38.87 | 37.32 | 55.24 | |||||||
2001 | 37.10 | a | 35.80 | c | 44.03 | a | 50.90 | a | 62.90 | b | 66.24 | a | 76.79 | b | 74.63 | a | 66.89 | b | 56.54 | c | 48.85 | d | 35.21 | b | 54.66 | |
2002 | 37.63 | d | 39.25 | d | 41.32 | c | 53.41 | a | 57.52 | b | 68.83 | 75.97 | 73.45 | 68.47 | 54.53 | a | 45.39 | g | 37.96 | d | 55.30 | a | ||||
2003 | 42.24 | b | 41.88 | c | 43.97 | a | 47.24 | a | 57.93 | c | 66.79 | a | 77.65 | 76.79 | b | 70.45 | a | 61.27 | a | 44.14 | b | 37.07 | b | 55.62 | ||
2004 | 40.68 | c | 36.15 | b | 52.04 | d | 51.59 | c | 58.74 | 66.10 | 71.70 | a | 73.37 | a | 67.63 | c | 56.28 | b | 43.38 | a | 38.15 | d | 54.65 | |||
2005 | 43.85 | e | 45.04 | d | 44.78 | d | 49.96 | b | 58.79 | b | 67.93 | 75.33 | a | 74.00 | a | 67.67 | c | 57.57 | c | 45.93 | a | 36.57 | a | 55.62 | ||
2006 | 36.03 | b | 39.70 | e | 42.11 | d | 50.08 | e | 61.41 | b | 72.10 | 79.40 | a | 75.86 | c | 66.41 | c | 55.84 | f | 43.72 | e | 35.21 | g | 56.68 | b | |
2007 | 34.50 | g | 40.96 | c | 48.33 | d | 51.28 | a | 62.87 | a | 69.53 | 78.14 | b | 78.68 | 70.76 | a | 56.03 | b | 48.86 | b | 35.32 | f | 60.54 | b | ||
2008 | 38.56 | f | 39.58 | c | 44.20 | a | 47.16 | e | ----- | z | 69.69 | a | 77.47 | a | 75.35 | 70.61 | b | 57.93 | d | 48.57 | b | 40.39 | c | 57.09 | b | |
2009 | 41.97 | 40.07 | 45.45 | b | 49.53 | k | 64.89 | l | 68.50 | l | 78.75 | c | 72.44 | m | 74.17 | r | ----- | z | ----- | z | ----- | z | 51.56 | h | ||
2010 | 44.50 | q | 43.67 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.71 | x | ----- | z |
2012 | 37.00 | i | 38.60 | i | 41.58 | l | 51.53 | k | 61.24 | j | 69.35 | j | 75.22 | m | 77.65 | k | 68.83 | l | 56.00 | i | 46.24 | m | 38.06 | n | ----- | z |
2013 | 34.60 | k | 37.16 | i | 46.43 | j | 49.00 | h | 60.71 | n | 68.05 | k | 77.41 | i | 73.67 | j | 68.55 | j | 51.09 | i | 49.25 | n | 36.86 | i | ----- | z |
2014 | 36.14 | i | 40.47 | k | 46.84 | l | 50.33 | i | 59.44 | o | 67.11 | k | 75.59 | i | 73.33 | j | 70.28 | l | 57.71 | n | 42.35 | m | 41.05 | l | ----- | z |
2015 | 41.47 | l | 44.70 | h | 48.62 | j | 50.14 | i | 57.69 | o | 70.55 | h | 76.95 | i | 77.65 | n | 71.37 | k | 60.06 | n | 42.85 | q | 34.28 | m | ----- | z |
2016 | 38.12 | o | 41.21 | j | 46.00 | n | 52.21 | k | 59.17 | m | 71.95 | j | 78.11 | l | 75.86 | i | 68.00 | q | 58.82 | n | 51.06 | n | 42.94 | n | ----- | z |
2017 | 42.05 | i | 44.90 | h | 49.12 | o | 50.47 | m | 61.40 | p | 71.71 | m | 77.95 | l | 73.62 | o | 66.37 | k | 55.94 | n | 49.29 | p | ----- | z | ----- | z |
2018 | 43.50 | q | 41.21 | i | 45.62 | o | 54.67 | l | 61.07 | p | 70.56 | l | 74.75 | s | 75.55 | k | 69.00 | v | 59.12 | n | 41.64 | p | 39.47 | p | ----- | z |
2019 | 37.44 | o | 37.92 | p | 46.07 | q | 51.80 | o | 53.93 | p | 68.06 | l | 76.65 | k | 76.21 | l | 70.44 | n | 53.12 | n | 50.55 | s | 40.00 | q | ----- | z |
2020 | 37.46 | r | 36.75 | q | 46.60 | u | 48.82 | s | 60.21 | q | 67.78 | l | 75.50 | s | 76.81 | o | 67.60 | o | 56.32 | l | 46.47 | m | 36.67 | p | ----- | z |
2021 | 39.43 | q | 39.39 | j | 43.30 | k | 53.53 | k | 60.28 | m | 71.67 | i | 77.90 | k | 73.36 | q | 69.00 | l | 53.82 | n | 48.88 | n | 43.47 | p | ----- | z |
2022 | 36.88 | o | 37.88 | l | 42.10 | u | ----- | z | ----- | z | 71.25 | v | 79.44 | m | 76.19 | j | 70.87 | o | 60.26 | l | 40.31 | q | 36.93 | p | ----- | z |
2023 | 39.00 | t | 37.78 | j | 41.82 | n | 48.85 | j | 61.17 | y | 65.57 | w | 79.00 | v | 79.76 | n | 66.07 | o | 60.08 | r | 49.60 | o | 43.08 | r | ----- | z |
2024 | 38.75 | s | 41.30 | s | 44.20 | u | 49.25 | n | 53.17 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.64 | 39.69 | 43.60 | 49.39 | 58.11 | 66.56 | 74.89 | 73.45 | 67.02 | 54.84 | 43.24 | 37.21 | 53.56 | |||||||||||||
S.D. | 3.53 | 3.56 | 3.23 | 2.98 | 2.92 | 3.10 | 2.62 | 2.64 | 3.71 | 3.29 | 3.15 | 3.20 | 1.74 | |||||||||||||
SKEW | -0.09 | 0.18 | 0.19 | 0.28 | -0.01 | -0.11 | -1.09 | -0.20 | -1.04 | -0.29 | -0.14 | -0.11 | -0.78 | |||||||||||||
MAX | 43.85 | 48.48 | 52.04 | 56.93 | 64.58 | 73.73 | 79.40 | 78.68 | 72.67 | 61.27 | 48.86 | 44.84 | 55.64 | |||||||||||||
MIN | 30.37 | 31.93 | 37.58 | 43.66 | 52.07 | 58.20 | 66.57 | 67.81 | 57.43 | 47.26 | 36.87 | 30.55 | 49.10 | |||||||||||||
YRS | 43 | 46 | 45 | 45 | 45 | 46 | 46 | 45 | 45 | 46 | 43 | 41 | 32 |