YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.11 | 59.12 | a | 57.03 | 50.24 | 43.55 | 38.52 | 51.10 | f | |||||
1949 | 31.24 | 40.70 | 45.69 | 49.11 | b | 53.19 | 54.50 | 57.60 | 57.84 | 56.57 | 46.93 | c | 50.25 | r | 41.00 | a | 48.58 | a | ||||||||
1950 | 34.08 | 42.16 | 43.74 | 47.15 | 49.26 | 56.45 | 58.85 | 60.10 | 56.55 | 50.48 | 46.73 | 49.29 | 49.57 | |||||||||||||
1951 | 41.24 | 43.91 | 41.69 | 49.45 | 52.73 | 56.68 | 59.61 | 58.81 | 57.13 | 53.32 | 46.93 | 40.11 | 50.14 | |||||||||||||
1952 | 38.31 | 42.07 | 43.21 | 48.25 | 52.06 | 54.71 | a | 60.27 | 60.42 | 58.32 | 55.63 | 42.30 | 42.48 | 49.84 | ||||||||||||
1953 | 47.24 | 44.21 | 44.98 | 47.53 | 51.85 | 54.28 | a | 59.92 | 60.52 | 59.85 | 54.53 | 49.07 | 44.35 | 51.53 | ||||||||||||
1954 | 41.18 | 44.68 | 43.30 | a | 46.88 | 52.78 | a | 54.33 | 56.97 | 59.31 | 57.87 | 52.73 | 50.50 | 43.03 | 50.30 | |||||||||||
1955 | 39.82 | 41.34 | 42.13 | 44.24 | a | 49.00 | a | 54.86 | a | 57.13 | a | 58.13 | 56.72 | a | 52.55 | 44.35 | 42.76 | 48.59 | ||||||||
1956 | 42.10 | 38.00 | 43.82 | 48.32 | 54.26 | 54.96 | c | 59.82 | a | 60.47 | a | 58.10 | a | 51.19 | 44.76 | a | 41.59 | b | 49.78 | |||||||
1957 | 36.03 | 44.71 | 47.29 | b | 49.77 | 54.48 | 58.50 | 60.10 | a | 60.31 | 62.97 | a | 53.13 | a | 44.90 | 44.65 | a | 51.40 | ||||||||
1958 | 45.32 | a | 49.50 | 45.03 | 50.53 | 56.26 | 60.95 | a | 63.79 | 62.53 | 59.86 | a | 54.92 | 47.43 | 47.31 | 53.62 | ||||||||||
1959 | 43.95 | 43.70 | 46.05 | 49.53 | 52.69 | 57.23 | 60.08 | 58.55 | a | 56.03 | 54.07 | c | 46.02 | 41.52 | a | 50.79 | ||||||||||
1960 | 39.24 | 43.22 | 44.77 | a | 48.68 | 50.56 | 56.37 | 57.63 | 59.22 | a | 57.43 | b | 53.15 | a | 45.84 | b | 41.97 | b | 49.84 | |||||||
1961 | 45.95 | 46.16 | 45.81 | 47.23 | 52.00 | 58.15 | 61.28 | b | 61.71 | 55.60 | 51.42 | 43.57 | a | 42.16 | 50.92 | |||||||||||
1962 | 39.44 | 44.59 | 44.30 | a | 48.62 | 49.55 | a | 54.68 | b | 57.44 | 60.22 | a | 58.12 | 53.17 | a | 47.97 | 43.27 | 50.11 | ||||||||
1963 | 37.05 | 50.02 | 44.40 | a | 46.57 | b | 51.60 | a | 55.57 | a | 57.37 | 59.94 | 60.90 | 54.23 | 47.82 | e | 43.89 | 50.78 | ||||||||
1964 | 43.19 | 42.59 | 44.10 | 46.08 | 49.65 | 55.37 | 59.39 | 59.11 | 57.31 | a | 53.35 | 44.30 | 40.39 | 49.57 | ||||||||||||
1965 | 41.19 | 44.20 | 47.97 | 48.80 | 49.73 | a | 54.80 | 59.97 | 61.35 | 58.38 | 55.97 | b | 49.25 | 39.52 | 50.93 | |||||||||||
1966 | 42.97 | 43.43 | 44.77 | 49.78 | 51.42 | 56.83 | a | 58.90 | 60.18 | c | 61.20 | c | 52.77 | 48.47 | a | 45.87 | 51.38 | |||||||||
1967 | 44.55 | a | 44.73 | 43.44 | 44.43 | 53.10 | 58.90 | 61.05 | a | 63.61 | 61.83 | 54.29 | e | 47.80 | 41.56 | 51.61 | ||||||||||
1968 | 41.37 | 49.60 | 47.85 | 46.25 | 52.23 | 56.40 | 59.94 | e | 60.03 | 59.13 | 50.75 | a | 47.12 | 39.92 | 50.88 | |||||||||||
1969 | 35.89 | 40.39 | 46.52 | 47.52 | 55.75 | a | 59.52 | a | 58.60 | 59.23 | 58.82 | 51.93 | a | 46.63 | 43.90 | 50.39 | ||||||||||
1970 | 42.61 | 47.43 | 46.11 | 45.40 | 52.19 | 57.33 | 59.00 | 59.37 | 55.83 | 50.98 | 47.07 | 39.71 | b | 50.25 | ||||||||||||
1971 | 40.72 | a | 41.93 | a | 43.00 | 47.31 | a | 51.82 | 53.71 | a | 58.58 | 62.27 | 57.72 | a | 50.97 | 45.64 | a | 40.03 | 49.47 | |||||||
1972 | 39.00 | 42.86 | a | 47.61 | 45.30 | 53.56 | 56.57 | a | 61.25 | c | 61.13 | 57.52 | e | 49.48 | i | 47.28 | a | 37.69 | 49.98 | a | ||||||
1973 | 39.90 | 46.07 | 45.18 | a | 48.52 | 52.66 | 56.23 | 58.05 | 57.83 | h | 60.52 | 52.11 | 44.00 | a | 46.05 | 49.94 | a | |||||||||
1974 | 39.44 | 42.59 | 45.90 | 48.33 | 49.94 | 55.45 | 59.02 | 59.73 | 60.43 | a | 52.89 | 47.40 | 44.71 | 50.48 | ||||||||||||
1975 | 43.31 | 42.88 | 44.00 | 44.28 | 52.39 | 55.07 | 59.06 | 58.40 | 59.45 | 51.31 | 45.10 | 43.47 | 49.89 | |||||||||||||
1976 | 42.65 | 42.62 | 43.32 | 47.08 | 52.56 | 54.28 | 59.26 | 60.06 | 60.28 | 52.89 | 47.78 | 41.16 | 50.33 | |||||||||||||
1977 | 40.84 | 45.93 | 43.52 | 48.60 | 49.58 | 56.87 | 58.24 | 62.10 | 56.60 | 52.06 | 44.95 | 44.48 | 50.31 | |||||||||||||
1978 | 43.79 | 46.04 | a | 49.08 | 48.33 | 52.16 | 60.08 | d | 61.48 | c | 60.92 | g | 58.55 | 56.11 | 42.15 | 36.56 | 50.39 | a | ||||||||
1979 | 34.94 | 42.07 | 48.61 | 48.65 | 54.13 | 56.27 | 61.24 | 60.50 | 62.23 | 56.05 | 45.22 | 46.11 | 51.33 | |||||||||||||
1980 | 39.02 | 46.09 | 45.52 | 49.42 | 51.66 | 54.98 | 59.19 | 58.89 | 59.27 | 54.69 | 47.96 | b | 45.79 | 51.04 | ||||||||||||
1981 | 46.27 | 45.48 | 47.90 | 49.67 | 52.79 | 55.78 | 60.10 | 61.55 | 58.58 | 52.79 | 47.87 | 44.45 | a | 51.94 | ||||||||||||
1982 | 40.61 | 42.87 | a | 44.77 | a | 45.97 | 51.42 | a | 56.90 | 58.87 | a | 61.16 | 56.85 | 51.88 | a | 44.16 | a | 41.89 | 49.78 | |||||||
1983 | 45.18 | 47.14 | 48.55 | 49.68 | 54.35 | 57.03 | 60.11 | 61.13 | a | 59.50 | 54.94 | 48.27 | 38.63 | 52.04 | ||||||||||||
1984 | 43.44 | 45.40 | 48.40 | 46.73 | 51.27 | 53.60 | a | 58.75 | c | 58.18 | 55.95 | 49.70 | a | 45.07 | 38.76 | 49.60 | ||||||||||
1985 | 38.71 | 40.96 | 42.79 | 48.78 | 51.89 | 56.70 | 60.05 | a | 59.60 | 57.84 | a | 50.55 | a | 38.48 | 36.71 | 48.59 | ||||||||||
1986 | 45.56 | 44.77 | 49.69 | b | 47.17 | f | 53.68 | f | 57.87 | d | 58.30 | a | 59.98 | a | 55.70 | c | 54.87 | a | 47.65 | d | 43.21 | c | 51.76 | b | ||
1987 | 41.64 | c | 46.52 | b | 48.23 | 50.67 | c | 55.11 | 56.91 | b | 56.03 | b | 60.85 | d | 58.43 | c | 55.94 | d | 47.83 | a | 39.55 | c | 51.48 | |||
1988 | 40.74 | 45.22 | 46.34 | c | 49.32 | 52.45 | 57.28 | 60.17 | b | 60.33 | a | 57.90 | a | 55.76 | 47.50 | 42.17 | a | 51.27 | ||||||||
1989 | 41.69 | 37.04 | a | 45.71 | b | 53.25 | d | 53.36 | c | 58.93 | b | 58.92 | 60.93 | b | 60.37 | 52.60 | 47.05 | a | 41.61 | 50.95 | ||||||
1990 | 43.20 | a | 42.20 | 47.77 | a | 51.53 | 52.61 | 57.19 | a | 61.50 | a | 62.77 | a | 61.37 | d | 51.58 | 47.23 | 35.95 | 51.24 | |||||||
1991 | 40.94 | 49.27 | 44.57 | b | 47.48 | a | 50.35 | 55.35 | 60.64 | b | 61.68 | a | 62.68 | 53.85 | 47.77 | 43.23 | 51.48 | |||||||||
1992 | 44.28 | b | 48.19 | b | 51.25 | a | 52.38 | b | 56.83 | a | 59.50 | a | 61.18 | 62.42 | 57.72 | 53.45 | a | 46.57 | a | 39.85 | a | 52.80 | ||||
1993 | 37.87 | 42.34 | 48.97 | 50.22 | 56.50 | 57.43 | a | 59.87 | 61.98 | 59.20 | 54.63 | 41.38 | a | 41.50 | 50.99 | |||||||||||
1994 | 44.33 | a | 42.55 | 49.10 | 50.74 | a | 54.32 | 55.91 | a | 59.32 | 61.74 | 60.37 | 51.81 | 41.43 | 42.18 | 51.15 | ||||||||||
1995 | 45.95 | 47.15 | a | 47.60 | 49.02 | a | 53.82 | a | 56.94 | c | 62.88 | a | 60.05 | 62.09 | a | 52.40 | 51.05 | 43.60 | 52.71 | |||||||
1996 | 42.63 | 44.03 | 47.71 | b | 51.26 | a | 51.71 | 56.45 | b | 61.58 | f | 61.10 | a | 57.40 | 51.98 | 46.03 | a | 43.02 | a | 50.30 | a | |||||
1997 | 42.45 | a | 44.14 | 46.35 | 49.90 | a | 58.10 | a | 56.93 | a | 60.85 | a | 62.60 | f | 60.69 | c | 52.07 | a | 49.65 | 41.06 | 51.11 | a | ||||
1998 | 45.45 | 45.86 | 47.45 | 48.22 | a | 53.32 | 56.79 | a | 61.48 | c | 61.33 | b | 59.32 | 52.70 | a | 47.53 | 40.74 | 51.68 | ||||||||
1999 | 42.63 | 43.59 | 44.15 | a | 47.72 | 50.84 | b | 54.91 | a | 58.13 | d | 61.84 | f | 57.48 | 52.40 | 49.17 | 43.90 | b | 49.54 | a | ||||||
2000 | 40.79 | b | 44.88 | 44.89 | 51.62 | 53.11 | 57.43 | a | 59.89 | 60.35 | 59.65 | 52.05 | 42.40 | 42.45 | a | 50.79 | ||||||||||
2001 | 42.48 | a | 43.18 | 46.58 | 47.03 | 53.92 | 54.98 | 58.67 | b | 60.48 | b | 58.37 | 52.00 | a | 47.82 | 42.76 | 50.69 | |||||||||
2002 | 42.62 | b | 44.36 | 43.72 | a | 49.40 | 50.93 | b | 57.71 | a | 60.70 | a | 60.44 | d | 58.98 | c | 51.69 | 48.15 | 44.28 | b | 51.08 | |||||
2003 | 46.90 | 44.46 | 48.52 | 47.98 | a | 53.56 | 59.82 | b | 61.37 | 61.82 | 60.18 | 55.33 | a | 44.17 | 43.10 | a | 52.27 | |||||||||
2004 | 41.61 | 44.83 | 48.60 | 52.57 | 54.87 | 58.60 | a | 63.12 | b | 65.20 | c | 59.47 | a | 53.65 | 45.35 | 43.85 | 52.64 | |||||||||
2005 | 43.39 | 44.98 | 49.44 | 50.07 | 56.22 | a | 56.81 | a | 62.37 | e | 62.21 | g | 56.75 | 52.59 | b | 43.97 | 42.39 | 50.81 | a | |||||||
2006 | 45.65 | 43.50 | 44.41 | b | 49.77 | ----- | z | 59.79 | b | 61.43 | a | 59.82 | a | 58.78 | 51.48 | a | 46.48 | 41.97 | 51.19 | a | ||||||
2007 | 39.56 | 44.68 | 48.35 | 48.69 | a | 52.73 | 56.72 | 62.08 | 61.45 | 57.93 | 51.02 | 44.98 | 41.57 | a | 50.81 | |||||||||||
2008 | 38.30 | a | 44.07 | 43.60 | 45.95 | a | 53.75 | a | 53.16 | a | 60.11 | c | 60.53 | 57.38 | d | 51.76 | 48.76 | a | 39.15 | 49.71 | ||||||
2009 | 41.08 | 42.16 | 43.45 | c | 47.75 | 52.37 | a | 57.21 | b | 61.34 | 61.13 | 59.43 | c | 53.00 | 46.60 | 38.24 | 50.31 | |||||||||
2010 | 46.53 | 47.16 | 47.10 | 47.71 | b | 50.56 | 55.19 | a | 58.85 | 59.81 | 59.57 | 52.76 | 44.55 | 44.11 | 51.16 | |||||||||||
2011 | 43.06 | 40.73 | 45.40 | 44.90 | 49.69 | 56.15 | 58.68 | 60.60 | 58.88 | 52.73 | 43.90 | 38.98 | 49.48 | |||||||||||||
2012 | 42.10 | 43.14 | 43.19 | 49.67 | 52.47 | 55.10 | 59.26 | 59.90 | a | 57.08 | 52.37 | 47.93 | 41.89 | 50.34 | ||||||||||||
2013 | 37.84 | 43.62 | 46.11 | 49.10 | a | 54.71 | 56.93 | 59.05 | 61.58 | 58.87 | 50.60 | 45.66 | a | 37.28 | a | 50.11 | ||||||||||
2014 | 42.53 | 42.79 | 49.03 | 50.32 | 56.50 | 57.37 | 62.47 | 63.37 | 62.47 | 58.23 | 47.23 | 45.92 | 53.18 | |||||||||||||
2015 | 45.34 | 49.68 | 50.76 | 49.70 | 53.98 | 58.20 | 62.85 | 63.29 | 58.48 | 57.27 | 45.12 | 44.21 | 53.24 | |||||||||||||
2016 | 44.06 | 49.10 | 48.87 | 53.12 | 55.65 | 59.21 | a | 60.35 | 61.65 | 57.72 | 54.10 | 50.70 | 37.66 | 52.68 | ||||||||||||
2017 | 37.70 | a | 43.00 | 46.73 | 48.77 | 54.47 | 58.12 | 59.82 | 63.45 | a | 62.40 | f | 52.68 | 47.20 | 41.73 | a | 50.33 | a | ||||||||
2018 | 45.71 | 41.59 | 44.85 | g | 50.58 | 54.39 | 58.36 | a | 61.74 | 62.85 | 58.25 | 53.87 | 47.38 | 43.58 | 52.57 | a | ||||||||||
2019 | 43.03 | 38.48 | 46.08 | 50.38 | 55.68 | 58.50 | 62.08 | 63.60 | a | 60.38 | 50.21 | 45.63 | 43.03 | 51.42 | ||||||||||||
2020 | 45.29 | 43.86 | 44.55 | 50.08 | 55.50 | 58.18 | 60.58 | 62.11 | 62.63 | 53.50 | 48.35 | 48.07 | c | 52.73 | ||||||||||||
2021 | 43.06 | 42.52 | 43.82 | 50.43 | b | 52.53 | a | 59.41 | a | 61.11 | 61.29 | 59.70 | 52.45 | 49.05 | 45.58 | 51.75 | ||||||||||
2022 | 43.27 | 43.16 | 47.37 | 46.20 | 50.31 | 57.57 | 62.16 | 63.45 | 61.07 | 55.90 | b | 42.62 | 41.32 | 51.20 | ||||||||||||
2023 | 42.53 | 41.04 | 42.31 | 47.57 | 56.10 | a | 57.45 | 62.06 | 65.23 | 59.55 | 54.47 | ----- | z | ----- | z | 52.83 | b | |||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 41.81 | 44.08 | 45.98 | 48.62 | 52.90 | 56.76 | 59.97 | 60.89 | 58.87 | 52.97 | 46.29 | 42.13 | 50.94 | |||||||||||||
S.D. | 3.17 | 2.63 | 2.24 | 2.01 | 2.06 | 1.70 | 1.61 | 1.59 | 1.81 | 1.90 | 2.35 | 2.72 | 1.11 | |||||||||||||
SKEW | -0.76 | 0.14 | 0.20 | -0.06 | 0.20 | 0.15 | 0.06 | 0.51 | 0.35 | 0.12 | -0.63 | -0.03 | 0.31 | |||||||||||||
MAX | 47.24 | 50.02 | 51.25 | 53.25 | 58.10 | 60.95 | 63.79 | 65.23 | 62.97 | 58.23 | 51.05 | 49.29 | 53.62 | |||||||||||||
MIN | 31.24 | 37.04 | 41.69 | 44.24 | 49.00 | 53.16 | 56.03 | 57.84 | 55.60 | 46.93 | 38.48 | 35.95 | 48.59 | |||||||||||||
YRS | 75 | 75 | 74 | 74 | 73 | 75 | 75 | 71 | 75 | 75 | 74 | 75 | 62 |