YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.42 | 52.26 | 50.88 | m | ----- | z | ----- | z | ----- | z | 51.84 | j | ||
1949 | 31.16 | 37.79 | 42.58 | 44.27 | 48.30 | a | 48.00 | 49.45 | 50.87 | 50.86 | b | 43.29 | 45.67 | 38.35 | 44.22 | |||||||||||
1950 | 36.03 | 39.86 | 40.03 | 41.77 | 43.61 | 51.23 | 49.83 | b | 49.16 | 49.23 | 48.86 | b | 45.27 | 47.45 | 45.19 | |||||||||||
1951 | 40.23 | 41.36 | 37.26 | 43.30 | 47.97 | 48.20 | 50.87 | 51.41 | i | 48.93 | 47.74 | 44.40 | 39.03 | 44.48 | a | |||||||||||
1952 | 38.29 | 39.72 | 38.29 | 41.53 | 46.94 | 48.80 | 51.10 | 49.97 | 50.17 | 47.35 | 39.83 | 41.42 | 44.45 | |||||||||||||
1953 | 45.65 | 40.43 | 39.00 | 40.20 | 44.84 | 48.83 | 52.19 | 52.84 | 53.20 | 48.03 | a | 46.93 | 41.77 | 46.16 | ||||||||||||
1954 | 41.37 | a | 41.86 | 39.52 | 42.93 | 45.26 | 47.67 | 49.71 | 52.48 | 50.93 | a | 46.29 | 47.43 | 40.68 | 45.51 | |||||||||||
1955 | 37.80 | a | 37.57 | 39.10 | 39.10 | a | 43.61 | 47.21 | b | 49.20 | a | 47.90 | a | 47.90 | a | 45.91 | i | 42.73 | 42.84 | 43.18 | a | |||||
1956 | 41.13 | 36.21 | 39.23 | 41.50 | b | 46.58 | e | 48.48 | c | 49.53 | a | 50.45 | 49.35 | d | 45.23 | 41.65 | d | 38.73 | e | 44.01 | ||||||
1957 | 36.65 | 42.62 | b | 43.32 | c | 43.33 | c | 49.21 | c | 53.19 | d | 52.10 | a | 51.17 | a | 54.27 | 48.44 | d | 42.26 | c | 41.81 | e | 46.53 | |||
1958 | 43.26 | d | 48.52 | g | 39.48 | 43.67 | o | 48.10 | 54.03 | 52.33 | a | 53.13 | 53.07 | b | 46.90 | b | 46.00 | d | 46.24 | f | 48.48 | c | ||||
1959 | 43.94 | 39.54 | 42.00 | 45.00 | c | 45.47 | a | 50.37 | c | 52.20 | a | 50.67 | a | 50.39 | b | 48.81 | e | 42.24 | e | 41.18 | i | 46.42 | a | |||
1960 | 41.35 | 40.52 | 42.97 | a | 42.96 | b | 46.90 | 47.58 | d | 48.50 | a | 52.93 | b | 48.67 | c | 47.40 | f | 43.86 | b | 43.07 | b | 45.39 | a | |||
1961 | 44.73 | a | 43.50 | b | 43.34 | b | 43.20 | 46.68 | c | 49.52 | g | 51.33 | a | 51.96 | c | 50.54 | d | 45.42 | e | 41.63 | 41.16 | 45.77 | a | |||
1962 | 36.84 | 41.21 | 41.40 | a | 43.04 | b | 44.52 | 46.33 | 49.65 | 53.13 | a | 51.73 | 48.07 | d | 45.68 | b | 43.61 | h | 45.60 | a | ||||||
1963 | 36.15 | d | 48.25 | 41.04 | c | 42.00 | 46.32 | 48.97 | 52.84 | 51.48 | 52.54 | b | 49.35 | 46.00 | a | 43.17 | a | 46.51 | ||||||||
1964 | 40.39 | 38.86 | 38.90 | 41.17 | 44.06 | 49.10 | 51.23 | 50.47 | a | 48.20 | 47.45 | 42.67 | 42.40 | a | 44.57 | |||||||||||
1965 | 41.52 | 39.43 | 39.84 | 43.64 | b | 43.26 | 48.13 | 49.50 | a | 53.74 | 46.80 | 47.85 | e | 47.07 | a | 39.11 | c | 44.99 | ||||||||
1966 | 41.10 | 38.96 | 41.16 | 44.03 | 45.39 | 49.90 | a | 51.58 | 50.90 | a | 51.54 | b | 47.28 | b | 46.40 | 42.04 | d | 45.86 | ||||||||
1967 | 40.42 | g | 39.19 | g | 39.65 | h | 38.90 | j | 44.17 | h | 50.04 | e | 50.53 | a | 51.81 | 52.04 | b | 47.79 | g | 45.90 | 38.29 | 48.10 | f | |||
1968 | 38.00 | 45.52 | 42.10 | 40.40 | 45.84 | 48.86 | a | 51.42 | 52.77 | 51.12 | f | 45.71 | g | 43.53 | k | 39.47 | l | 45.61 | d | |||||||
1969 | 36.37 | d | 38.23 | b | 40.65 | 41.34 | a | 47.45 | 52.37 | 51.16 | 49.52 | 50.26 | c | 46.64 | i | 42.38 | f | 43.50 | a | 45.08 | b | |||||
1970 | 45.33 | a | 43.25 | 43.77 | 41.17 | 46.55 | b | 49.54 | b | 48.19 | 48.74 | 48.43 | 44.19 | 42.42 | f | 37.48 | 45.15 | a | ||||||||
1971 | 39.03 | a | 38.57 | 38.42 | 40.47 | 44.29 | 45.97 | 49.74 | 52.71 | 49.43 | 44.36 | c | 41.97 | a | 37.90 | 43.57 | ||||||||||
1972 | 38.20 | a | 41.61 | a | 42.90 | a | 41.62 | a | 45.42 | 49.33 | 52.35 | 51.06 | 48.28 | e | 46.35 | 43.92 | e | 35.22 | h | 45.55 | a | |||||
1973 | 39.10 | a | 40.72 | c | 38.84 | 41.70 | 44.58 | 48.73 | 49.00 | h | 48.33 | d | 51.73 | 46.48 | 43.39 | b | 44.38 | e | 44.36 | a | ||||||
1974 | 38.26 | 39.00 | g | 41.90 | k | 42.41 | h | 43.19 | j | 47.74 | c | 50.65 | 51.71 | c | 49.60 | e | 43.96 | e | 41.83 | f | 40.21 | g | 46.99 | f | ||
1975 | 38.27 | e | 39.19 | g | 39.07 | d | 38.13 | g | 43.41 | d | 47.10 | j | 50.26 | h | 49.68 | l | 50.28 | e | 49.13 | a | 42.56 | c | 40.56 | f | 43.79 | f |
1976 | 36.89 | m | 34.42 | j | 33.50 | i | 36.77 | h | 40.07 | d | 46.43 | g | 51.15 | d | 53.23 | 52.60 | e | 50.14 | q | ----- | z | ----- | z | 49.26 | h | |
1977 | ----- | z | 40.85 | b | 37.00 | b | 41.59 | a | 43.13 | 49.27 | d | 48.55 | 53.16 | 50.37 | 47.61 | 43.67 | 44.71 | 45.45 | a | |||||||
1978 | 45.85 | d | 44.23 | f | 45.89 | c | 43.90 | 46.93 | c | 50.79 | b | 52.00 | a | 52.87 | 52.30 | 50.00 | g | 40.64 | e | 37.53 | a | 46.87 | b | |||
1979 | 38.13 | 42.50 | 44.00 | a | 44.50 | 47.30 | a | 47.80 | 52.36 | f | 53.30 | d | 55.00 | a | 51.13 | 44.37 | c | 42.68 | f | 46.80 | b | |||||
1980 | 38.82 | c | 45.67 | b | 41.19 | 44.63 | 46.21 | b | 49.38 | d | 51.72 | b | 49.74 | d | 50.33 | 46.13 | a | 43.37 | 41.77 | 45.75 | ||||||
1981 | 43.03 | 41.32 | 41.32 | 42.07 | 46.52 | 50.80 | 48.77 | a | 53.13 | 50.13 | 46.77 | 46.63 | 45.03 | 46.29 | ||||||||||||
1982 | 38.71 | 40.64 | 39.94 | 39.50 | 43.53 | a | 50.45 | a | 50.40 | a | 51.76 | b | 51.50 | 47.73 | a | 41.60 | 40.74 | 44.71 | ||||||||
1983 | 41.94 | 43.32 | 42.68 | 39.52 | a | 45.74 | 49.27 | 51.26 | 51.79 | b | 51.48 | a | 48.38 | b | 44.97 | a | 42.21 | b | 46.05 | |||||||
1984 | 40.39 | 40.39 | a | 43.42 | 41.60 | 45.13 | 48.10 | 50.48 | 51.68 | 49.97 | 46.45 | 43.53 | 38.74 | 44.99 | ||||||||||||
1985 | 39.77 | 39.96 | 39.47 | a | 44.81 | c | 45.06 | 50.30 | 52.33 | a | 52.52 | 51.70 | 47.87 | 38.93 | b | 39.89 | c | 45.22 | ||||||||
1986 | 45.74 | 45.61 | 45.52 | 44.13 | 45.87 | a | 51.50 | 51.74 | 51.17 | a | 48.83 | a | 49.26 | 46.55 | a | 42.60 | a | 47.38 | ||||||||
1987 | 40.62 | b | 42.61 | 43.71 | 43.73 | 48.39 | 49.57 | 52.23 | 50.87 | 50.67 | 49.48 | 46.30 | 39.84 | 46.50 | ||||||||||||
1988 | 40.52 | 40.48 | 40.03 | 43.45 | a | 45.39 | 49.10 | 51.52 | 51.13 | 49.40 | 49.81 | 43.93 | 42.10 | a | 45.57 | |||||||||||
1989 | 39.63 | a | 35.29 | 41.55 | 46.77 | 46.90 | a | 49.50 | b | 52.14 | b | 53.35 | 48.90 | 45.81 | 43.43 | 40.77 | 45.34 | |||||||||
1990 | 41.45 | 38.60 | c | 41.39 | 46.66 | a | 47.52 | 49.60 | 53.16 | 54.32 | 52.13 | 45.23 | 40.30 | 33.78 | h | 46.40 | a | |||||||||
1991 | 38.40 | a | 45.07 | ----- | z | 43.00 | b | 45.04 | e | 48.54 | d | 51.29 | 53.00 | g | 49.76 | a | 47.41 | b | 43.50 | f | 39.33 | j | 46.06 | d | ||
1992 | 43.00 | j | 46.00 | k | 45.27 | i | 48.36 | h | 48.11 | l | 50.95 | h | 53.73 | i | 52.20 | k | 50.65 | j | 49.32 | i | 43.17 | l | 39.63 | l | ----- | z |
1993 | 38.84 | l | 41.22 | j | 46.14 | i | 46.22 | g | 50.10 | k | 51.36 | h | 52.48 | j | 52.86 | i | 49.52 | i | 48.00 | o | 39.45 | j | 40.55 | k | ----- | z |
1994 | 41.68 | l | 39.83 | j | 44.00 | h | 44.85 | j | 48.52 | j | 48.76 | i | 52.05 | l | 53.29 | g | 51.33 | l | 45.90 | k | 38.36 | h | 39.58 | l | ----- | z |
1995 | 44.25 | k | 43.11 | j | 42.64 | i | 43.17 | l | 45.87 | h | 48.42 | d | 53.85 | d | 51.90 | b | 51.70 | g | 47.05 | j | 45.39 | g | 41.93 | q | 51.39 | i |
1996 | 40.80 | f | 42.30 | f | 41.19 | d | 45.04 | b | 44.48 | d | 47.12 | d | 51.77 | a | 51.70 | a | 52.50 | x | 47.12 | e | 43.55 | j | 44.36 | f | 46.91 | e |
1997 | 42.08 | f | 40.53 | i | 41.95 | i | 43.48 | i | 49.27 | e | 50.89 | b | 52.87 | 54.07 | d | 53.62 | i | 47.15 | e | 45.83 | f | 40.67 | j | 50.85 | g | |
1998 | 46.79 | c | 43.79 | 43.47 | a | 41.83 | 46.92 | f | 50.72 | a | 52.83 | a | 52.71 | 51.12 | d | 46.96 | g | 44.70 | c | 38.97 | b | 46.69 | b | |||
1999 | 41.45 | 40.65 | b | 38.81 | 41.97 | 44.35 | 48.33 | 50.71 | 53.48 | 50.07 | 46.63 | a | 47.37 | 40.96 | d | 45.40 | ||||||||||
2000 | 41.55 | 43.85 | b | 40.65 | 44.89 | b | 47.65 | 51.07 | b | 51.45 | 52.06 | 50.83 | 46.61 | 41.73 | 42.33 | a | 46.22 | |||||||||
2001 | 40.96 | c | 40.36 | 43.84 | 42.37 | 46.65 | 48.13 | 50.90 | 53.16 | 50.07 | 48.61 | 45.60 | 43.21 | b | 46.15 | |||||||||||
2002 | 40.27 | a | 42.46 | 40.52 | 44.52 | a | 45.23 | 49.77 | 53.00 | 51.84 | 50.93 | 46.97 | 47.55 | a | 44.00 | 46.42 | ||||||||||
2003 | 45.84 | 40.11 | 42.67 | a | 41.83 | 42.71 | 45.87 | 42.63 | a | 47.58 | 52.60 | 50.97 | 43.50 | 43.33 | s | 45.12 | a | |||||||||
2004 | 45.07 | b | 42.89 | a | 43.94 | 45.10 | 48.12 | g | 52.53 | 53.97 | a | 55.74 | 52.40 | 48.52 | 42.71 | b | 43.37 | a | 47.84 | a | ||||||
2005 | 42.30 | a | 41.21 | 45.00 | 44.93 | 51.25 | c | 51.27 | 53.84 | 52.74 | 49.90 | 49.10 | b | 44.27 | 43.52 | d | 47.44 | |||||||||
2006 | 43.71 | x | 39.50 | l | 40.61 | 44.23 | 46.42 | 52.38 | a | 53.68 | 52.53 | a | 50.48 | a | 48.19 | 45.97 | 43.48 | 47.80 | b | |||||||
2007 | 38.62 | b | 42.04 | a | 42.52 | 42.63 | 46.23 | 48.28 | e | 54.90 | 53.30 | d | 52.07 | 47.94 | 43.53 | 39.52 | b | 45.96 | ||||||||
2008 | 38.03 | 41.41 | 39.35 | 40.73 | 45.90 | 48.07 | 51.68 | 52.79 | b | 50.37 | 47.73 | a | 45.87 | 37.94 | 44.99 | |||||||||||
2009 | 41.32 | 40.50 | 39.65 | 42.17 | 48.19 | 51.57 | 51.61 | 52.04 | d | 51.50 | 47.42 | 45.20 | 39.55 | 45.89 | ||||||||||||
2010 | 45.52 | 44.39 | 42.77 | 42.47 | 44.39 | 49.33 | 52.71 | g | 51.55 | 53.43 | 50.84 | 42.97 | 42.32 | 46.36 | a | |||||||||||
2011 | 43.06 | 40.19 | b | 44.00 | 42.17 | 44.32 | 49.43 | 52.87 | 53.52 | 52.77 | 50.87 | 44.33 | 40.23 | 46.48 | ||||||||||||
2012 | 42.52 | 40.90 | 39.94 | 43.83 | 46.74 | 48.90 | 52.48 | 52.48 | 49.60 | 49.35 | 47.00 | 39.48 | 46.10 | |||||||||||||
2013 | 39.42 | 40.43 | 42.84 | 44.03 | a | 47.29 | 50.27 | 52.53 | a | 53.06 | 53.23 | 45.43 | q | 42.93 | 38.26 | 45.85 | a | |||||||||
2014 | 42.42 | 42.36 | 45.61 | 45.77 | 50.58 | 51.43 | 54.65 | 54.45 | 53.87 | 53.61 | 49.07 | 47.84 | 49.30 | |||||||||||||
2015 | 44.42 | 46.68 | 45.71 | 44.07 | 48.10 | 51.70 | 55.29 | 55.55 | 52.30 | 51.45 | 44.73 | 44.55 | 48.71 | |||||||||||||
2016 | 46.35 | 46.62 | 45.87 | 47.93 | 50.23 | 51.13 | 54.29 | 52.55 | 52.33 | 53.00 | 50.27 | 40.97 | 49.30 | |||||||||||||
2017 | 39.13 | 44.14 | 45.39 | 45.70 | ----- | z | 49.81 | d | 52.52 | ----- | z | ----- | z | 49.27 | p | 44.83 | 41.30 | a | 45.35 | d | ||||||
2018 | 44.87 | 40.07 | 39.97 | 43.34 | a | 48.87 | 51.30 | 54.52 | 54.45 | 52.70 | 49.10 | 46.50 | 42.45 | 47.35 | ||||||||||||
2019 | 44.58 | 37.18 | 41.48 | 46.90 | a | 46.65 | 49.96 | b | 53.77 | 54.63 | a | 53.24 | e | 46.75 | c | 42.50 | b | 42.13 | h | 47.06 | a | |||||
2020 | 43.32 | c | 38.00 | e | 39.29 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.45 | j | 49.55 | k | 42.15 | q | 38.75 | s | 40.66 | j |
2021 | 40.85 | r | 38.22 | j | 36.90 | j | 40.68 | h | 44.11 | m | 49.20 | o | 52.06 | n | 52.16 | l | 51.31 | q | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | 41.56 | o | 37.80 | m | 39.64 | i | 39.52 | i | 42.16 | l | 49.19 | i | 52.38 | o | 54.04 | h | 50.52 | i | 47.65 | k | 38.35 | j | 39.80 | k | ----- | z |
2023 | 41.85 | k | 34.00 | j | 35.65 | h | 41.55 | j | 45.42 | 48.23 | 51.48 | j | 53.26 | h | 49.86 | i | 43.67 | j | 44.26 | k | 44.29 | n | 46.83 | j | ||
2024 | 44.52 | j | 42.55 | i | 40.15 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 40.98 | 41.32 | 41.57 | 43.08 | 46.10 | 49.52 | 51.54 | 52.09 | 50.94 | 47.86 | 44.35 | 41.44 | 45.97 | |||||||||||||
S.D. | 3.16 | 2.64 | 2.28 | 1.91 | 2.03 | 1.68 | 1.98 | 1.68 | 1.70 | 2.07 | 2.27 | 2.41 | 1.32 | |||||||||||||
SKEW | -0.21 | 0.33 | 0.18 | 0.20 | 0.05 | 0.25 | -1.30 | -0.54 | 0.04 | 0.39 | 0.03 | 0.39 | 0.80 | |||||||||||||
MAX | 46.79 | 48.25 | 45.89 | 47.93 | 51.25 | 54.03 | 55.29 | 55.74 | 55.00 | 53.61 | 50.27 | 47.84 | 49.30 | |||||||||||||
MIN | 31.16 | 35.29 | 37.00 | 39.10 | 40.07 | 45.87 | 42.63 | 47.58 | 46.80 | 43.29 | 38.93 | 37.48 | 43.57 | |||||||||||||
YRS | 62 | 59 | 62 | 61 | 63 | 66 | 65 | 65 | 63 | 57 | 59 | 52 | 36 |