YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.06 | 65.90 | 65.30 | 54.33 | k | 46.17 | f | 34.66 | f | 66.09 | i | |||
1949 | 28.66 | o | 31.12 | k | ----- | z | 48.92 | x | 52.66 | b | 65.28 | a | 70.60 | 64.73 | 65.62 | b | 55.09 | b | 58.30 | 41.18 | 59.18 | d | ||||
1950 | 32.63 | 44.89 | a | 42.76 | 51.10 | 56.78 | b | 60.55 | b | 73.73 | a | ----- | z | ----- | z | ----- | z | 53.36 | b | 48.82 | a | 51.62 | c | |||
1951 | 41.61 | c | ----- | z | 42.48 | c | 51.38 | 54.94 | 65.12 | 71.24 | 70.40 | 69.27 | 54.10 | a | 47.22 | a | 36.89 | 54.97 | a | |||||||
1952 | 34.16 | 40.26 | 36.69 | 47.79 | a | 55.52 | 53.24 | a | 72.97 | 71.13 | 67.12 | a | 61.85 | 43.92 | 37.97 | 51.89 | ||||||||||
1953 | 44.66 | 41.11 | 39.85 | 43.75 | 43.90 | a | 52.62 | 71.60 | 64.63 | e | 66.47 | ----- | z | ----- | z | 45.17 | d | 51.38 | b | |||||||
1954 | 38.65 | 49.60 | b | 39.52 | 52.58 | 58.02 | 57.70 | 72.31 | 62.92 | 61.15 | 56.05 | 49.90 | 41.61 | 53.33 | ||||||||||||
1955 | 36.23 | 38.06 | a | 42.35 | 39.12 | 52.37 | 58.20 | 63.83 | a | 73.40 | 68.13 | d | 58.52 | 45.53 | a | 40.10 | b | 51.32 | ||||||||
1956 | 38.47 | 37.27 | e | 43.31 | b | 45.98 | 52.32 | 60.31 | a | 71.57 | c | 66.66 | 66.45 | 51.61 | 54.47 | 48.31 | b | 53.06 | ||||||||
1957 | 35.35 | 45.09 | 42.69 | 47.93 | 50.47 | 65.57 | 69.76 | 65.63 | 65.27 | 51.34 | 46.40 | 45.43 | b | 52.58 | ||||||||||||
1958 | 43.02 | 41.23 | 35.80 | a | 46.93 | 55.45 | b | 57.55 | 69.87 | e | 73.55 | c | 65.05 | b | 63.37 | e | 50.92 | e | 55.08 | l | 54.79 | a | ||||
1959 | 43.83 | d | 38.19 | a | 48.04 | s | 55.15 | c | 50.02 | d | 63.08 | d | 77.71 | g | 71.22 | d | 59.39 | g | 61.29 | c | 56.82 | e | 49.50 | i | 54.95 | d |
1960 | 37.10 | a | 40.10 | c | 48.06 | d | 47.37 | 51.94 | d | 70.71 | b | 76.14 | i | 71.17 | d | 69.12 | j | 56.25 | c | 45.28 | g | 43.19 | j | 52.84 | d | |
1961 | 48.00 | h | 43.09 | e | 40.16 | f | 49.86 | b | 45.33 | v | 67.98 | a | 74.48 | h | 71.16 | f | 62.54 | b | 59.67 | h | 46.19 | c | 44.06 | e | 52.28 | f |
1962 | 44.00 | e | 39.04 | b | 39.10 | b | 53.13 | c | 50.11 | d | 63.61 | b | ----- | z | 69.06 | e | 66.79 | a | 58.02 | a | 50.12 | e | 48.95 | b | 52.90 | a |
1963 | 42.96 | c | 49.23 | b | 39.80 | c | 39.39 | c | 53.17 | d | 59.55 | 66.53 | b | 68.48 | 67.15 | c | 55.88 | n | 46.13 | d | 48.32 | f | 53.24 | b | ||
1964 | 38.92 | e | 44.10 | e | 39.66 | f | 46.82 | e | 50.35 | e | 58.06 | e | 69.72 | f | 69.75 | c | 62.96 | f | 63.59 | d | 41.26 | i | 41.42 | g | 53.09 | e |
1965 | 44.35 | g | 45.37 | e | 42.78 | f | 45.04 | f | 54.19 | d | 57.57 | i | 68.04 | f | 69.62 | b | ----- | z | 64.71 | b | 46.55 | b | 41.63 | d | 53.68 | f |
1966 | 40.11 | c | 39.76 | i | 45.31 | b | 55.79 | d | 58.48 | c | 64.42 | e | 66.76 | d | 73.60 | e | 62.48 | i | 61.13 | h | 46.11 | k | 45.46 | r | 57.78 | e |
1967 | 44.24 | h | 46.67 | e | 40.74 | d | 33.71 | b | 56.87 | h | 61.54 | e | 74.79 | g | 78.56 | f | 68.35 | d | 60.69 | e | 52.31 | d | 38.77 | a | 50.35 | d |
1968 | 43.05 | 47.98 | b | 46.72 | a | 51.07 | b | 53.93 | a | 67.40 | 73.75 | c | 66.66 | c | 67.22 | a | 58.65 | 47.48 | b | 38.63 | e | 55.21 | ||||
1969 | 39.50 | d | 34.70 | 49.73 | p | 46.17 | a | 58.32 | c | 58.78 | g | 73.69 | 74.68 | a | 68.27 | 53.57 | a | 53.70 | 44.50 | e | 54.71 | b | ||||
1970 | 42.27 | 45.77 | 45.02 | b | 44.98 | a | 60.55 | b | 64.53 | 74.45 | 72.37 | 67.08 | 57.33 | a | 48.90 | a | 37.77 | 55.09 | ||||||||
1971 | 44.92 | a | 44.39 | 43.79 | 44.95 | 49.13 | 60.83 | 72.98 | 72.63 | 66.28 | 54.53 | a | 45.79 | b | 35.38 | e | 52.97 | |||||||||
1972 | 43.81 | d | 45.24 | 51.63 | 47.10 | 58.76 | 66.08 | 74.29 | b | 69.44 | 62.69 | a | 52.46 | c | 43.84 | b | 39.23 | e | 54.55 | |||||||
1973 | 38.24 | d | 40.52 | a | 37.25 | a | 50.78 | 61.24 | 67.50 | a | 73.45 | b | 70.48 | 64.47 | a | 56.66 | 40.59 | b | 43.12 | b | 53.69 | |||||
1974 | 40.36 | f | 41.71 | 43.32 | a | 46.28 | a | 56.21 | b | 66.07 | 67.78 | f | 69.06 | w | 73.62 | m | 58.77 | a | 47.96 | b | 41.30 | a | 50.20 | d | ||
1975 | 42.46 | e | 40.57 | a | 38.87 | a | 39.68 | 57.47 | 64.97 | 67.69 | b | 68.27 | 71.42 | 53.29 | 45.92 | 48.05 | 53.22 | |||||||||
1976 | 49.02 | 42.59 | 42.10 | 43.97 | 58.97 | 62.67 | a | 69.79 | 61.74 | 64.17 | a | 61.40 | a | 56.21 | a | 50.69 | 55.28 | |||||||||
1977 | 44.35 | a | 49.18 | 40.02 | 52.63 | 45.61 | 67.35 | 69.80 | a | 72.16 | 62.22 | 60.03 | 50.92 | 46.65 | a | 55.08 | ||||||||||
1978 | 43.00 | 43.12 | 47.79 | 44.27 | 57.68 | 63.13 | 71.81 | 70.63 | 63.29 | a | 65.27 | 46.18 | 41.66 | 54.82 | ||||||||||||
1979 | 38.40 | 40.04 | 44.55 | 46.47 | 59.40 | 66.08 | 71.00 | 66.42 | 69.65 | 56.23 | 47.75 | 48.91 | c | 54.57 | ||||||||||||
1980 | 44.56 | 46.38 | a | 41.34 | 48.90 | 51.08 | 57.98 | a | 70.66 | 70.05 | 65.64 | a | 62.71 | 53.32 | 52.13 | 55.40 | ||||||||||
1981 | 45.95 | 44.93 | 41.52 | 49.88 | 55.15 | 69.12 | 73.79 | 73.81 | 68.53 | 53.27 | 48.30 | 46.20 | a | 55.87 | ||||||||||||
1982 | 39.15 | a | 44.27 | 38.83 | d | 45.93 | b | 57.48 | b | 59.00 | 69.53 | 70.15 | a | 61.48 | 55.37 | 45.17 | c | 43.46 | e | 52.49 | ||||||
1983 | 46.95 | b | 42.84 | c | 40.78 | a | 41.60 | 57.25 | a | 61.70 | 65.13 | 69.27 | 67.98 | 58.05 | 44.38 | b | 41.52 | a | 53.12 | |||||||
1984 | 49.33 | e | 43.79 | 48.04 | c | 46.80 | c | 61.97 | 64.02 | b | 74.97 | 71.06 | 71.07 | a | 51.73 | 42.00 | d | 38.89 | d | 55.30 | ||||||
1985 | 43.18 | 44.33 | a | 38.61 | 54.15 | 50.68 | a | 69.19 | a | 72.66 | 68.16 | 57.62 | 56.08 | ----- | z | ----- | z | 55.47 | b | |||||||
1986 | 49.08 | 44.41 | 49.42 | 46.73 | 55.60 | 64.37 | 67.83 | a | 73.74 | 57.78 | 57.35 | 51.57 | 45.79 | 55.31 | ||||||||||||
1987 | 40.03 | 42.56 | a | 43.26 | b | 54.06 | d | 57.38 | c | 65.92 | 64.00 | b | 70.40 | 67.93 | a | 62.08 | e | 44.88 | a | 36.03 | a | 54.04 | ||||
1988 | 42.23 | 49.34 | 47.74 | 49.13 | 52.02 | b | 65.59 | b | 77.00 | 74.62 | b | 71.05 | 66.56 | 47.72 | a | 42.48 | f | 58.46 | a | |||||||
1989 | 46.06 | 43.46 | b | 48.55 | 59.38 | d | 58.15 | 65.45 | 70.20 | a | 67.15 | 63.43 | b | 56.40 | 55.13 | c | 50.38 | c | 56.98 | |||||||
1990 | 42.05 | 40.04 | 45.60 | a | 52.95 | 52.34 | 62.57 | 71.85 | 67.79 | 64.62 | a | 61.06 | 49.38 | b | 39.95 | 54.18 | ||||||||||
1991 | 45.43 | a | 51.35 | a | 35.90 | 44.53 | 50.06 | 59.52 | 72.77 | a | 67.60 | b | 72.19 | c | 64.48 | 51.38 | 45.03 | 55.02 | ||||||||
1992 | 46.18 | 44.88 | 43.53 | 53.47 | 62.69 | 61.55 | 66.95 | 73.00 | 67.83 | a | 60.40 | 48.87 | 38.98 | 55.69 | ||||||||||||
1993 | 39.27 | 38.88 | c | 47.40 | 46.70 | b | 52.87 | 61.12 | 67.53 | a | 69.03 | a | 67.87 | 59.77 | 49.03 | a | 43.60 | 53.59 | ||||||||
1994 | 47.05 | b | 39.84 | 47.95 | 48.87 | 52.52 | 64.07 | a | 73.16 | 71.67 | a | 65.58 | 55.55 | 38.90 | a | 42.03 | a | 53.93 | ||||||||
1995 | 40.10 | 51.65 | a | 42.13 | 45.12 | 50.65 | 59.47 | a | 67.98 | a | 71.15 | 67.64 | b | 61.80 | a | 55.43 | 44.32 | 54.79 | ||||||||
1996 | 45.00 | a | 44.26 | 47.47 | 50.00 | 54.40 | a | 64.88 | 75.34 | 74.77 | 64.80 | 56.05 | a | 48.83 | 43.81 | 55.80 | ||||||||||
1997 | 42.50 | 42.36 | 50.53 | 48.48 | 60.84 | 60.41 | a | 69.43 | a | 68.06 | 66.03 | 55.98 | 48.02 | 41.34 | 54.50 | |||||||||||
1998 | 41.66 | 36.39 | 43.00 | 44.23 | 42.79 | 56.60 | a | 71.00 | a | 75.18 | 64.38 | b | 54.25 | a | 43.60 | 42.44 | 51.29 | |||||||||
1999 | 45.24 | 40.48 | b | 38.75 | a | 44.59 | a | 53.26 | 60.92 | 68.52 | a | 66.00 | 70.48 | b | 65.10 | 50.83 | 46.56 | 54.23 | ||||||||
2000 | 41.92 | 41.25 | a | 44.16 | 51.22 | a | 56.09 | b | 67.82 | 67.66 | b | 71.69 | 64.28 | 54.98 | a | 44.05 | 49.18 | 54.53 | ||||||||
2001 | 41.45 | b | 38.04 | b | 48.08 | 44.07 | 65.32 | 65.28 | 70.06 | 71.90 | a | 67.58 | 63.27 | a | 48.93 | 40.16 | b | 55.35 | ||||||||
2002 | 40.61 | 46.67 | a | 43.32 | 48.42 | 54.60 | 64.83 | 73.26 | 71.19 | 68.05 | 58.56 | 52.67 | 40.53 | 55.23 | ||||||||||||
2003 | 52.19 | 42.05 | 46.03 | 40.52 | a | 53.90 | b | 66.47 | 74.84 | 68.79 | c | 71.53 | 64.11 | 43.21 | a | 40.55 | 55.35 | |||||||||
2004 | 41.58 | 38.88 | 53.69 | 51.35 | 54.44 | 63.50 | 71.40 | 70.27 | a | 66.33 | 54.24 | b | 44.83 | a | 45.47 | 54.66 | ||||||||||
2005 | 44.42 | a | 43.08 | b | 46.82 | 46.17 | 53.23 | a | 56.52 | a | 75.73 | 74.21 | 62.47 | 56.40 | 52.56 | d | 45.35 | 54.75 | ||||||||
2006 | 41.81 | 46.98 | c | 35.21 | 44.98 | 58.45 | 67.58 | 76.11 | 69.93 | a | 67.93 | 56.43 | a | 47.25 | 44.63 | 54.78 | ||||||||||
2007 | 41.03 | 41.34 | 51.52 | 49.32 | 58.42 | 64.43 | 70.18 | 71.40 | 61.41 | b | 54.22 | a | 54.59 | b | 38.16 | 54.67 | ||||||||||
2008 | 38.63 | 43.02 | 44.69 | 46.78 | a | 55.65 | 66.75 | 72.75 | a | 72.92 | 70.25 | 61.00 | 52.07 | a | 41.78 | a | 55.52 | |||||||||
2009 | 48.68 | a | 39.93 | 42.48 | 47.18 | 60.66 | b | 59.83 | 73.64 | b | 70.84 | 69.43 | 54.52 | b | 49.13 | 41.40 | a | 54.81 | ||||||||
2010 | 44.03 | 42.12 | 44.06 | 43.59 | b | 48.26 | 61.41 | a | 72.21 | 70.10 | b | 67.27 | 57.12 | a | 45.70 | 42.75 | a | 53.22 | ||||||||
2011 | 47.33 | a | 39.65 | b | 40.66 | 45.30 | b | 48.47 | a | 58.09 | c | 68.48 | 70.79 | b | 72.84 | h | 58.95 | b | 43.84 | e | 44.27 | 51.44 | a | |||
2012 | 47.48 | a | 42.36 | 41.63 | 48.52 | 56.60 | 61.25 | 69.80 | a | 76.17 | a | 72.13 | 58.18 | 51.03 | a | 39.33 | a | 55.37 | ||||||||
2013 | 43.45 | a | 42.95 | 49.45 | 53.05 | 55.97 | 65.62 | e | 74.87 | 68.65 | 62.55 | 58.27 | 50.97 | 47.52 | 56.11 | |||||||||||
2014 | 53.50 | 45.91 | 48.35 | 51.83 | 56.84 | 66.08 | 74.39 | 71.06 | 67.95 | 60.76 | 52.23 | 43.13 | 57.67 | |||||||||||||
2015 | 52.32 | 53.17 | a | 53.56 | 50.13 | 53.42 | 69.38 | 69.13 | 71.00 | 67.87 | 62.29 | 44.24 | a | 39.20 | a | 57.14 | ||||||||||
2016 | 41.87 | 52.22 | 46.16 | 50.75 | 55.29 | 67.68 | 72.87 | 74.00 | 65.87 | 54.26 | 50.15 | 43.05 | 56.18 | |||||||||||||
2017 | 40.23 | 41.20 | 48.18 | 47.00 | 56.63 | 67.37 | 76.00 | c | 75.90 | 64.68 | 60.61 | 49.33 | 51.85 | 56.58 | ||||||||||||
2018 | 48.40 | 43.34 | 42.55 | 48.66 | a | 54.37 | 65.87 | 77.73 | 73.11 | 68.53 | 59.61 | 54.00 | 43.52 | 56.64 | ||||||||||||
2019 | 45.15 | 34.09 | 42.05 | 52.77 | 51.52 | 66.70 | 69.97 | 72.32 | 62.35 | 57.44 | 53.68 | 41.42 | 54.12 | |||||||||||||
2020 | 42.05 | 48.17 | 40.35 | 49.53 | 56.69 | 63.52 | 72.74 | 74.06 | 72.55 | 67.52 | 49.93 | 46.60 | 56.98 | |||||||||||||
2021 | 44.16 | 42.25 | 41.52 | 52.10 | 57.27 | 67.33 | 76.76 | 74.23 | 69.00 | 52.61 | 54.15 | 41.61 | 56.08 | |||||||||||||
2022 | 47.94 | 46.91 | 48.05 | 47.67 | 54.10 | 64.93 | 72.34 | 75.06 | 68.95 | 64.05 | 44.33 | 41.58 | 56.33 | |||||||||||||
2023 | 39.00 | 38.34 | 35.68 | 48.27 | 54.82 | 61.09 | a | 75.13 | 70.98 | 61.92 | 59.11 | 50.10 | 46.45 | 53.41 | ||||||||||||
2024 | 42.76 | 40.60 | 42.15 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.84 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 43.01 | 43.15 | 43.72 | 47.96 | 54.77 | 63.35 | 71.45 | 70.56 | 66.42 | 58.39 | 48.90 | 43.23 | 54.71 | |||||||||||||
S.D. | 4.10 | 3.99 | 4.34 | 4.30 | 4.17 | 3.85 | 3.14 | 3.09 | 3.25 | 3.96 | 4.10 | 3.88 | 1.41 | |||||||||||||
SKEW | 0.14 | 0.33 | 0.16 | -0.35 | -0.33 | -0.57 | -0.31 | -0.52 | -0.40 | 0.27 | 0.02 | 0.30 | -0.35 | |||||||||||||
MAX | 53.50 | 53.17 | 53.69 | 59.38 | 65.32 | 70.71 | 77.73 | 76.17 | 72.55 | 67.52 | 58.30 | 52.13 | 57.67 | |||||||||||||
MIN | 32.63 | 34.09 | 35.21 | 33.71 | 42.79 | 52.62 | 63.83 | 61.74 | 57.62 | 51.34 | 38.90 | 35.38 | 51.29 | |||||||||||||
YRS | 71 | 73 | 70 | 73 | 73 | 73 | 68 | 72 | 68 | 70 | 70 | 67 | 56 |