YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 54.88 | r | 57.33 | g | 65.48 | f | 76.19 | d | 73.57 | b | 74.73 | i | 71.11 | l | 57.89 | d | 49.33 | j | 31.75 | e | 59.85 | h |
1961 | 36.56 | g | 44.73 | d | 46.82 | i | 56.58 | j | 67.89 | l | 73.38 | e | 74.79 | e | 74.17 | g | 66.32 | e | 58.91 | i | 41.53 | l | 38.48 | e | 59.54 | g |
1962 | 35.05 | c | 48.06 | j | 43.54 | d | 57.89 | c | 69.12 | e | 72.74 | a | 74.68 | f | 76.21 | n | 64.74 | m | 59.50 | k | 47.77 | h | 41.63 | e | 53.33 | f |
1963 | 34.03 | a | 45.38 | c | 48.67 | d | 58.95 | b | 66.10 | g | 72.34 | e | 79.50 | g | 75.70 | d | 70.34 | a | 61.59 | i | 50.33 | g | 36.22 | d | 55.20 | d |
1964 | 34.93 | j | 33.71 | c | 44.74 | d | 56.29 | f | 65.71 | e | 73.37 | c | 78.32 | c | 76.46 | d | 70.59 | b | 60.11 | l | 48.30 | e | 37.66 | i | 61.40 | d |
1965 | 41.67 | e | 40.52 | c | 43.61 | c | 57.87 | d | 64.84 | b | 71.38 | 76.96 | h | 73.25 | a | 66.91 | c | 57.91 | d | 52.04 | e | 41.15 | k | 57.00 | b | |
1966 | 32.87 | d | 37.96 | b | 50.66 | 58.04 | c | 67.48 | e | 73.89 | b | 80.95 | b | 72.18 | f | 67.70 | h | 57.41 | h | 50.84 | e | 36.83 | h | 56.59 | d | |
1967 | 40.72 | f | 44.04 | c | 54.50 | b | 62.25 | d | 64.57 | b | 73.02 | b | 77.10 | a | 72.70 | d | 67.30 | b | 60.90 | a | 47.83 | g | 34.96 | e | 61.13 | b |
1968 | 38.53 | b | 42.08 | e | 46.22 | d | 53.62 | b | 64.34 | b | 74.38 | i | 73.71 | c | 72.84 | c | 67.94 | d | 60.56 | d | 46.75 | h | 38.78 | f | 57.76 | c |
1969 | 47.50 | g | 42.67 | e | 40.48 | d | 58.76 | e | 65.63 | 72.31 | c | 78.83 | g | 77.22 | a | 68.33 | d | 55.73 | e | 45.46 | b | 41.09 | i | 58.51 | c | |
1970 | 37.36 | b | 46.02 | e | 44.57 | b | 54.87 | d | 65.82 | 71.14 | b | 77.07 | b | 77.62 | n | 69.12 | e | 55.38 | b | 47.69 | q | 41.94 | n | 57.93 | c | |
1971 | 38.46 | c | 41.31 | b | 50.60 | 55.27 | b | 64.94 | d | 75.24 | e | 77.19 | b | 71.03 | k | 70.33 | o | 56.38 | f | 47.69 | c | 40.21 | g | 56.34 | d | |
1972 | 39.34 | f | 46.07 | a | 53.87 | a | 62.89 | c | 64.21 | x | 72.90 | j | 73.45 | j | 71.66 | 67.21 | d | 57.86 | b | 42.00 | p | ----- | z | 59.93 | f | |
1973 | 40.63 | p | 38.79 | d | 45.84 | c | 48.86 | b | 62.67 | e | 71.30 | h | 77.55 | t | 75.18 | l | 66.45 | h | 60.02 | a | 49.52 | f | 41.21 | g | 51.24 | g |
1974 | 39.20 | c | 41.85 | d | 54.21 | x | 55.35 | f | 66.85 | g | 74.46 | c | 74.93 | d | 70.30 | c | 62.39 | b | 56.15 | a | 45.15 | c | 36.70 | f | 58.05 | d |
1975 | 38.95 | 37.59 | f | 47.33 | a | 52.50 | 60.96 | c | 72.46 | d | 72.38 | o | 73.31 | e | 62.93 | h | 58.62 | g | 46.39 | c | 40.64 | c | 54.07 | d | ||
1976 | 31.89 | v | ----- | z | 50.88 | k | 56.64 | b | 62.35 | 71.26 | a | 72.38 | f | 72.17 | m | 67.31 | d | 52.83 | d | 41.35 | f | 37.56 | f | 62.08 | g | |
1977 | 33.31 | g | 39.67 | h | 46.50 | c | 56.30 | 66.02 | a | 75.96 | c | 77.72 | d | 75.63 | p | 71.35 | j | 59.78 | o | 50.50 | b | 45.56 | e | 59.79 | e | |
1978 | 35.48 | b | 42.07 | u | ----- | z | 60.50 | w | 63.07 | i | 74.42 | 78.05 | b | 73.60 | p | 66.02 | h | 58.74 | 48.05 | i | 36.97 | a | 56.73 | g | ||
1979 | 24.64 | x | 32.30 | w | ----- | z | 56.42 | 63.38 | a | 68.23 | f | 75.59 | h | ----- | z | 68.20 | b | 61.48 | b | 41.68 | b | 40.68 | l | 58.23 | g | |
1980 | ----- | z | 41.78 | m | 47.81 | d | 52.08 | f | 61.67 | s | 78.40 | i | 80.98 | c | 75.55 | a | 68.83 | d | 56.77 | c | 44.81 | c | 46.00 | x | 62.46 | f |
1981 | ----- | z | ----- | z | 50.73 | p | 59.17 | l | ----- | z | ----- | z | ----- | z | 72.79 | g | 67.66 | a | 57.62 | e | 52.21 | k | 44.33 | g | 62.64 | j |
1982 | 40.00 | e | 41.89 | e | 49.69 | b | 55.69 | c | 63.46 | c | 72.58 | d | 77.20 | f | 76.32 | a | 69.27 | d | 56.02 | d | 42.85 | f | 35.83 | e | 56.07 | b |
1983 | 38.34 | b | 42.04 | b | 48.22 | a | 51.62 | b | 62.19 | b | 71.14 | b | 77.94 | 76.72 | a | 72.05 | b | 60.17 | b | 50.26 | a | 33.16 | c | 56.99 | ||
1984 | 38.23 | c | 43.88 | 46.10 | g | 54.72 | c | 67.72 | a | 72.35 | d | 76.27 | a | 72.84 | 66.89 | b | 53.50 | 44.98 | c | 38.72 | b | 57.28 | a | |||
1985 | 34.61 | c | 38.75 | 49.18 | i | 58.36 | b | 64.84 | c | 72.38 | e | 75.57 | a | 75.46 | d | 65.69 | f | 58.55 | c | 50.00 | e | 39.02 | g | 58.72 | c | |
1986 | 44.36 | c | 43.37 | b | 52.28 | d | 59.54 | d | 64.55 | c | 70.69 | d | 75.40 | g | 72.94 | e | 67.27 | 55.53 | a | 42.52 | b | 36.17 | a | 55.38 | a | |
1987 | 35.07 | d | 40.79 | d | 43.92 | e | 54.06 | e | 62.23 | e | 70.80 | g | 75.59 | d | 73.79 | b | 66.62 | e | 59.96 | e | 44.00 | f | 35.50 | e | 54.75 | b |
1988 | 36.88 | f | 44.96 | a | 47.52 | k | 54.12 | i | 61.98 | f | 72.21 | d | 74.48 | e | 73.14 | c | 67.04 | c | 61.20 | f | 49.32 | h | 35.88 | g | 66.37 | g |
1989 | 41.24 | f | 36.65 | e | 53.37 | e | 59.29 | d | 69.12 | b | 72.70 | g | 75.90 | g | 74.06 | d | 66.45 | h | 60.71 | c | 48.54 | g | 37.16 | i | 58.87 | f |
1990 | 38.23 | k | 43.37 | e | 48.70 | a | 57.10 | f | 65.20 | i | 78.57 | c | 74.61 | l | 73.29 | g | 68.71 | f | 58.75 | g | 47.31 | i | 36.93 | d | 51.89 | h |
1991 | 36.56 | d | 43.78 | e | 49.05 | i | 56.33 | d | 66.19 | e | 71.38 | i | 72.15 | e | 71.73 | e | 62.69 | d | 58.82 | f | 45.28 | g | 36.90 | a | 55.79 | d |
1992 | 34.28 | b | 42.98 | f | 48.64 | b | 58.52 | a | 61.67 | e | 67.74 | i | 75.02 | f | 73.75 | e | 67.30 | c | 59.58 | g | 43.35 | c | 37.17 | d | 53.08 | d |
1993 | 39.19 | b | 40.43 | a | 49.13 | 56.22 | e | 63.65 | g | 73.64 | b | 77.44 | e | 73.36 | c | 66.22 | e | 53.90 | k | 43.10 | a | 38.57 | b | 55.73 | b | |
1994 | 38.63 | d | 40.37 | a | 48.24 | f | 55.72 | c | 65.50 | h | 77.00 | b | 78.42 | f | 76.63 | e | 68.08 | 57.05 | a | 47.00 | d | 41.82 | a | 55.81 | c | |
1995 | 40.70 | a | 47.60 | b | 47.91 | c | 54.85 | c | 63.97 | b | 71.31 | d | 76.84 | i | 76.98 | a | 68.44 | d | 59.31 | g | 53.67 | f | 42.15 | d | 57.10 | c |
1996 | 38.98 | h | 44.65 | f | 47.12 | j | 57.67 | i | 72.67 | e | 74.63 | d | 76.71 | g | 73.18 | n | 64.85 | g | 56.15 | d | 44.65 | g | 42.12 | j | 67.82 | i |
1997 | 30.14 | i | 37.16 | f | 49.15 | g | 50.83 | f | 63.91 | h | 71.48 | g | 75.56 | g | 74.53 | k | 70.13 | g | 57.85 | e | 47.40 | i | 34.83 | h | 57.85 | k |
1998 | 41.28 | b | 41.35 | b | 43.42 | k | 52.18 | e | 67.55 | l | ----- | z | 78.35 | g | 73.46 | e | 71.90 | e | 58.79 | b | 48.85 | f | 40.78 | f | 56.49 | f |
1999 | ----- | z | 48.02 | e | 48.36 | j | 53.52 | f | 61.18 | a | 70.07 | b | ----- | z | 75.35 | r | 66.81 | i | 58.07 | b | 51.15 | f | 36.86 | f | 59.34 | h |
2000 | 40.83 | a | 41.83 | b | 48.50 | d | 58.32 | b | 68.78 | b | 72.25 | d | 76.58 | a | 76.30 | d | 70.78 | 54.76 | b | 39.33 | c | 34.09 | c | 56.86 | ||
2001 | 33.48 | e | 42.98 | a | 46.00 | d | 57.40 | d | ----- | z | ----- | z | 78.67 | g | 74.32 | f | 68.89 | g | 59.30 | a | 48.13 | 38.67 | a | 46.57 | e | |
2002 | 41.41 | d | 40.00 | 45.15 | a | 59.72 | a | 66.50 | e | 76.24 | e | 76.02 | g | 75.74 | d | 66.94 | c | 53.92 | e | 46.72 | g | 38.23 | c | 56.39 | b | |
2003 | 42.24 | b | 40.31 | d | 48.87 | a | 55.75 | d | 66.84 | f | 70.80 | 78.77 | a | 75.91 | c | 68.25 | b | 60.46 | c | 48.43 | a | 40.45 | 57.29 | a | ||
2004 | 41.13 | 36.76 | b | 52.52 | c | 53.31 | d | 66.26 | 72.54 | d | 73.81 | b | ----- | z | 65.98 | b | 56.77 | i | 43.48 | g | 39.52 | h | 57.79 | d | ||
2005 | 43.30 | c | 42.62 | c | 46.86 | b | 53.62 | d | 61.98 | f | 73.83 | 77.29 | e | 71.96 | h | 70.44 | c | 57.73 | 48.72 | c | 41.43 | b | 55.58 | b | ||
2006 | 42.83 | a | 41.57 | a | 47.87 | a | 59.74 | c | 68.13 | 75.84 | b | 77.06 | 73.34 | c | 62.90 | 54.94 | 47.92 | 36.98 | a | 57.43 | ||||||
2007 | 29.76 | 43.46 | b | 49.97 | 51.02 | a | 60.77 | g | 69.38 | 72.79 | 75.08 | 68.48 | 59.87 | a | 46.93 | a | 36.98 | 54.88 | a | |||||||
2008 | 33.74 | 43.02 | 47.75 | a | 55.85 | 63.16 | 74.35 | 72.21 | 71.10 | 64.18 | 54.97 | b | 45.33 | 35.92 | e | 55.13 | ||||||||||
2009 | ----- | z | 42.87 | a | 48.36 | c | 53.90 | a | 64.06 | e | 72.62 | 74.48 | 72.69 | 63.62 | 51.85 | 45.40 | 31.90 | 56.52 | a | |||||||
2010 | 34.40 | 34.93 | 45.14 | b | 53.45 | 61.23 | a | 74.10 | 73.12 | a | 72.32 | 68.55 | ----- | z | 43.06 | f | 41.89 | 55.91 | b | |||||||
2011 | 36.35 | 35.43 | 51.37 | 58.43 | 62.89 | 77.22 | c | 79.00 | 79.18 | 67.30 | 56.31 | 45.42 | 30.50 | 56.62 | ||||||||||||
2012 | 41.63 | 38.14 | a | 51.71 | b | 58.97 | 66.47 | a | 76.80 | 76.50 | 75.76 | 67.21 | a | 56.52 | ----- | z | ----- | z | 60.97 | b | ||||||
2013 | 35.30 | d | ----- | z | ----- | z | 54.03 | 63.71 | ----- | z | 73.39 | 74.55 | 67.13 | 54.03 | 43.33 | 37.37 | 55.87 | c | ||||||||
2014 | 35.74 | ----- | z | 45.40 | 53.23 | 62.45 | 73.13 | 74.09 | d | ----- | z | 66.57 | 58.94 | ----- | z | 38.12 | c | 56.41 | c | |||||||
2015 | 36.00 | 41.91 | 48.56 | 54.47 | 60.40 | 72.35 | 75.29 | 75.24 | 71.23 | 58.06 | 44.82 | 39.66 | 56.50 | |||||||||||||
2016 | 37.73 | 44.71 | 49.69 | b | 54.42 | 60.94 | 74.15 | 80.28 | b | 72.77 | 68.40 | 63.53 | 48.80 | 40.85 | 58.02 | |||||||||||
2017 | 39.16 | 48.70 | 54.11 | 56.20 | b | 62.56 | 74.32 | 76.39 | 72.07 | a | 67.90 | 63.89 | v | 49.43 | i | 43.60 | u | 61.27 | c | |||||||
2018 | 42.03 | o | 43.55 | 51.24 | 57.13 | 70.08 | 78.54 | f | 77.81 | 75.97 | 69.55 | 57.03 | b | 45.22 | 39.11 | 58.67 | b | |||||||||
2019 | 40.05 | 40.82 | q | 48.50 | k | 57.92 | 62.84 | 73.03 | 78.37 | a | 79.08 | 72.10 | 53.27 | 46.07 | 40.94 | 60.37 | b | |||||||||
2020 | 41.21 | 41.14 | a | 52.06 | 57.55 | 69.53 | 76.63 | 79.60 | 78.60 | 66.80 | 58.03 | a | 51.83 | a | 40.73 | 59.48 | ||||||||||
2021 | 37.74 | 40.29 | 48.97 | 55.72 | 65.98 | 76.23 | 74.18 | 73.61 | 70.82 | 59.56 | 52.38 | 47.92 | 58.62 | |||||||||||||
2022 | 39.52 | 38.07 | 47.87 | 59.68 | 69.66 | 75.83 | 79.60 | 74.13 | 69.65 | 57.47 | 43.07 | 39.65 | 57.85 | |||||||||||||
2023 | 39.63 | 41.41 | 48.39 | 54.65 | 65.31 | ----- | z | 80.12 | f | 77.08 | 71.77 | 57.73 | 47.68 | 41.56 | 54.52 | b | ||||||||||
2024 | 36.39 | 43.10 | 46.71 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.07 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.05 | 41.78 | 48.38 | 56.21 | 64.97 | 73.58 | 76.36 | 74.56 | 67.93 | 57.46 | 46.65 | 38.30 | 57.35 | |||||||||||||
S.D. | 3.19 | 3.22 | 3.06 | 2.79 | 2.85 | 2.08 | 2.40 | 2.13 | 2.33 | 2.49 | 3.11 | 3.55 | 1.22 | |||||||||||||
SKEW | -0.25 | -0.30 | -0.04 | -0.06 | 0.55 | 0.31 | 0.07 | 0.28 | -0.33 | -0.09 | -0.05 | 0.14 | 0.00 | |||||||||||||
MAX | 44.36 | 48.70 | 54.50 | 62.89 | 72.67 | 78.57 | 80.98 | 79.18 | 72.10 | 63.53 | 52.38 | 47.92 | 59.48 | |||||||||||||
MIN | 29.76 | 33.71 | 40.48 | 48.86 | 60.40 | 69.38 | 72.15 | 70.30 | 62.39 | 51.85 | 39.33 | 30.50 | 55.13 | |||||||||||||
YRS | 45 | 50 | 47 | 52 | 46 | 48 | 40 | 44 | 49 | 47 | 35 | 40 | 10 |