YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.86 | b | 52.19 | 52.90 | 47.61 | 42.27 | 45.61 | 48.41 | f | |||||
1940 | 47.03 | 47.38 | 46.55 | 47.40 | 48.81 | 51.00 | 53.19 | 53.61 | 54.10 | 48.29 | 46.00 | 46.70 | a | 49.17 | ||||||||||||
1941 | 45.81 | 48.50 | 48.26 | 47.27 | 52.29 | 51.43 | 53.90 | 54.94 | m | 49.97 | 44.84 | 48.60 | 45.84 | 48.79 | a | |||||||||||
1942 | 45.16 | 43.18 | 40.94 | 45.43 | 47.35 | 47.60 | 53.65 | 53.03 | 51.67 | 46.16 | 44.80 | 42.74 | 46.81 | |||||||||||||
1943 | 41.55 | 45.18 | 46.52 | 46.03 | 44.97 | 48.10 | 50.94 | 52.48 | 52.87 | 48.06 | 47.00 | 42.94 | 47.22 | |||||||||||||
1944 | 43.65 | 40.66 | 42.06 | 44.10 | 46.48 | 49.73 | 52.00 | 51.03 | 48.50 | 49.23 | a | 46.17 | 46.71 | 46.69 | ||||||||||||
1945 | 40.84 | 42.11 | a | 40.90 | 41.10 | 48.65 | 48.27 | 53.42 | 50.23 | 49.43 | 49.55 | 45.90 | 46.03 | 46.37 | ||||||||||||
1946 | 40.10 | 39.14 | 41.19 | 42.47 | 47.45 | 49.60 | 52.65 | 52.58 | 50.33 | 44.71 | 43.10 | 44.48 | 45.65 | |||||||||||||
1947 | 37.39 | 44.57 | 46.77 | 46.00 | 48.37 | a | 50.53 | 53.84 | 54.48 | 51.07 | 50.03 | a | 41.62 | a | 41.35 | 47.17 | ||||||||||
1948 | 43.00 | 40.14 | 41.58 | 46.30 | 46.84 | 52.40 | 51.52 | 52.94 | 48.57 | 48.39 | 42.57 | 39.77 | 46.17 | |||||||||||||
1949 | 34.52 | 39.82 | 45.65 | 44.13 | 48.55 | 50.43 | 51.45 | 54.13 | 49.62 | n | 44.79 | c | ----- | z | ----- | z | 45.94 | c | ||||||||
1950 | ----- | z | 42.32 | c | 42.48 | 42.24 | i | 44.97 | 49.73 | 51.29 | 52.81 | d | 51.33 | 47.39 | 48.20 | 48.03 | 47.86 | b | ||||||||
1951 | 42.61 | 43.00 | 38.81 | 44.77 | 47.48 | 49.53 | 50.71 | 52.32 | 53.80 | 47.39 | 47.47 | 43.16 | 46.75 | |||||||||||||
1952 | 42.32 | 44.52 | 42.77 | 45.83 | 46.90 | 49.17 | 53.35 | 51.65 | 51.73 | 50.90 | 43.70 | 46.48 | 47.44 | |||||||||||||
1953 | 46.71 | 43.15 | o | ----- | z | 44.92 | f | 46.42 | 48.63 | 49.55 | 53.42 | 55.23 | 46.97 | 46.87 | 41.42 | 48.36 | c | |||||||||
1954 | 41.26 | 43.43 | 41.74 | 45.40 | 46.23 | 47.80 | 49.58 | 51.39 | 49.50 | 46.39 | 46.00 | 44.03 | 46.06 | |||||||||||||
1955 | 38.90 | 39.86 | 40.52 | 41.37 | 44.71 | 48.37 | 49.03 | 48.32 | 47.83 | 46.10 | 42.10 | a | 46.83 | g | 44.28 | a | ||||||||||
1956 | 46.17 | b | 40.29 | a | 43.03 | a | 46.23 | 48.46 | c | 50.57 | b | 53.47 | a | 50.61 | 51.63 | c | 48.84 | 44.97 | a | 41.60 | a | 47.16 | ||||
1957 | 39.62 | b | 47.22 | a | 45.89 | c | 46.23 | 50.57 | c | 50.70 | 51.85 | e | 52.38 | b | 53.70 | c | 51.97 | a | 46.30 | 45.29 | 48.48 | |||||
1958 | 44.33 | d | 48.14 | g | 44.93 | b | 47.47 | 51.07 | a | 55.10 | 55.19 | 54.97 | b | 51.70 | 49.03 | 44.33 | 45.19 | 49.39 | a | |||||||
1959 | 44.80 | a | 42.82 | 44.39 | c | 46.36 | b | 48.45 | 50.20 | 52.29 | c | 54.50 | a | 52.59 | a | 50.50 | a | 46.00 | g | 43.90 | b | 48.25 | a | |||
1960 | 42.97 | 44.21 | 47.48 | 46.27 | 48.10 | 52.32 | b | 51.94 | 51.23 | 51.10 | 47.81 | 47.60 | 45.84 | 48.07 | ||||||||||||
1961 | 46.35 | 45.39 | 44.61 | 46.37 | 49.48 | 53.10 | 52.23 | 56.59 | b | 52.69 | a | 49.68 | 44.53 | 42.00 | 48.59 | |||||||||||
1962 | 42.97 | b | 44.23 | b | 43.29 | 45.20 | 46.97 | a | 47.97 | 49.70 | a | 52.42 | 51.18 | b | 49.03 | a | 45.47 | 44.42 | 46.90 | |||||||
1963 | 39.87 | a | 48.00 | 42.52 | 45.90 | 49.29 | 48.72 | e | 51.37 | a | 51.03 | 52.10 | i | 51.48 | 48.80 | 41.39 | 47.12 | a | ||||||||
1964 | 39.81 | 40.28 | 40.94 | 44.27 | 45.60 | a | 49.77 | 51.52 | b | 52.29 | g | 50.69 | a | 49.93 | a | 46.04 | b | 45.97 | 45.89 | a | ||||||
1965 | 44.26 | 41.46 | 44.32 | 46.47 | 46.29 | 48.93 | a | 49.81 | 53.71 | 52.57 | 49.42 | 48.00 | 39.23 | 47.04 | ||||||||||||
1966 | 41.35 | 40.07 | 42.45 | 43.03 | 41.52 | 47.13 | 48.58 | 51.10 | 49.90 | 47.39 | 46.13 | 42.13 | 45.07 | |||||||||||||
1967 | 43.40 | a | 43.64 | 43.55 | 42.70 | 44.00 | 50.10 | 53.68 | 53.65 | 55.10 | 50.30 | a | 49.70 | 42.43 | a | 47.69 | ||||||||||
1968 | 45.27 | a | 49.59 | 46.10 | 43.70 | 48.26 | 50.70 | 52.74 | 53.67 | a | 50.23 | 48.74 | 47.10 | 43.32 | 48.28 | |||||||||||
1969 | 41.29 | 42.86 | 43.10 | a | 43.70 | 48.45 | 52.63 | 49.55 | 47.61 | 50.67 | 45.29 | 45.50 | 45.52 | 46.35 | ||||||||||||
1970 | 47.81 | 42.29 | 42.97 | 40.13 | 45.39 | 46.77 | 47.13 | 46.65 | 46.33 | 46.61 | 47.47 | 42.42 | 45.16 | |||||||||||||
1971 | 42.74 | 41.43 | 42.13 | 41.70 | 44.61 | 46.63 | 47.42 | 51.61 | 50.60 | 42.81 | 41.07 | a | 38.71 | 44.29 | ||||||||||||
1972 | 38.48 | 43.34 | 43.40 | a | 41.60 | 44.19 | 47.90 | a | 50.26 | 52.32 | 52.43 | 52.52 | 47.27 | 40.77 | a | 46.21 | ||||||||||
1973 | 43.13 | 47.50 | ----- | z | 45.33 | 48.00 | 50.73 | 51.06 | 51.42 | 52.23 | 49.26 | 45.93 | 44.81 | 48.13 | a | |||||||||||
1974 | 42.03 | 41.29 | 46.42 | 43.93 | 46.74 | 49.67 | 53.10 | 54.23 | 53.17 | 49.94 | 46.20 | 42.74 | 47.45 | |||||||||||||
1975 | 40.81 | 45.32 | 44.32 | 43.37 | 46.35 | 49.87 | 51.00 | a | 51.06 | 51.23 | 47.29 | 43.33 | 42.96 | e | 46.41 | |||||||||||
1976 | 40.94 | 42.70 | b | 41.17 | b | 42.13 | 47.03 | 48.57 | 51.94 | 55.00 | 52.63 | 48.90 | b | 47.43 | 42.00 | 46.70 | ||||||||||
1977 | 42.74 | 43.71 | 41.58 | 41.70 | 46.97 | 50.50 | 50.45 | 54.30 | a | 53.32 | e | 48.29 | 43.59 | a | 47.10 | 47.02 | ||||||||||
1978 | 47.16 | 46.21 | 49.19 | 45.67 | 46.10 | 50.63 | 51.52 | 51.48 | 49.63 | 47.48 | 41.60 | 39.17 | b | 47.15 | ||||||||||||
1979 | 42.13 | 41.79 | 45.32 | 44.33 | 46.97 | 47.80 | 51.29 | 53.42 | 51.97 | a | 51.52 | 46.23 | 45.71 | 47.37 | ||||||||||||
1980 | 44.23 | 47.90 | 44.16 | 44.90 | 48.23 | 50.63 | 53.74 | 53.45 | 51.60 | 47.35 | 44.89 | c | 46.10 | 48.10 | ||||||||||||
1981 | 46.52 | 45.89 | 45.90 | 44.77 | 47.87 | 49.53 | 50.97 | 51.61 | 50.80 | 47.23 | 49.60 | 46.29 | 48.08 | |||||||||||||
1982 | 40.77 | a | 44.32 | 43.97 | a | 43.38 | a | 48.16 | 52.28 | a | 52.68 | 52.71 | 50.77 | 48.57 | a | 47.67 | c | 45.32 | 47.55 | |||||||
1983 | 45.17 | b | 47.62 | b | 47.57 | a | 46.57 | 48.90 | b | 52.08 | d | 53.76 | b | 56.33 | a | 55.41 | c | 52.19 | 46.63 | c | 46.92 | g | 50.20 | a | ||
1984 | 44.37 | a | 43.15 | b | 44.71 | c | 43.03 | 46.39 | c | 48.70 | 52.93 | a | 53.67 | a | 50.93 | a | 47.21 | c | 46.03 | a | 42.13 | 46.94 | ||||
1985 | 41.83 | b | 41.93 | a | 42.71 | 45.79 | a | 48.46 | c | 51.17 | a | 52.59 | b | 52.84 | 52.53 | 48.94 | ----- | z | 44.17 | b | 47.54 | a | ||||
1986 | 47.65 | 47.81 | a | 47.74 | 44.70 | 45.83 | a | 52.33 | c | 52.70 | a | 53.60 | a | 52.03 | 49.41 | b | 45.50 | 43.17 | a | 48.54 | ||||||
1987 | 41.32 | c | 44.50 | b | 43.97 | 47.15 | d | 51.21 | c | 51.13 | o | ----- | z | 54.26 | d | 51.34 | a | 50.69 | b | 47.67 | 43.71 | c | 47.58 | b | ||
1988 | 44.19 | 44.41 | 42.21 | b | 44.83 | 46.94 | m | 50.43 | 52.75 | s | ----- | z | 47.30 | 49.59 | b | 45.66 | a | 40.68 | c | 45.48 | c | |||||
1989 | 39.41 | b | 37.96 | 45.87 | 47.00 | 47.84 | 49.62 | a | 50.38 | e | 52.28 | b | 52.14 | b | 48.41 | d | 48.62 | a | 45.58 | 47.09 | ||||||
1990 | 43.66 | b | 39.81 | b | 44.58 | 46.43 | 48.19 | 48.78 | c | 52.45 | b | 54.97 | b | 53.07 | a | 45.47 | a | 41.63 | 35.61 | 46.22 | ||||||
1991 | 38.32 | 41.54 | 39.42 | 40.24 | a | 42.48 | 45.27 | 50.33 | a | 53.90 | 52.07 | 48.27 | a | 44.87 | 42.21 | c | 44.91 | |||||||||
1992 | 42.32 | 47.48 | 48.70 | a | 47.63 | 50.13 | 52.67 | 55.29 | 50.40 | a | 50.27 | 51.52 | 44.75 | b | 41.96 | c | 48.59 | |||||||||
1993 | 41.28 | b | 44.15 | a | 47.87 | 41.83 | 45.73 | a | 46.31 | d | 48.52 | f | 52.65 | h | 44.42 | d | 47.19 | d | 43.00 | i | 41.68 | f | 44.85 | d | ||
1994 | 41.89 | l | 42.09 | f | 43.70 | h | 45.00 | i | 49.45 | i | 49.11 | b | 52.13 | 52.32 | 54.00 | 48.35 | 41.90 | 41.23 | 48.43 | e | ||||||
1995 | 48.00 | 47.46 | 46.00 | 46.97 | 50.23 | 50.07 | 54.74 | 52.48 | 52.73 | 49.84 | 46.50 | 46.58 | 49.30 | |||||||||||||
1996 | 45.45 | 47.17 | 45.90 | 45.97 | 47.87 | 48.57 | 51.74 | 52.23 | 50.07 | 47.74 | 47.73 | 48.16 | 48.22 | |||||||||||||
1997 | 45.26 | 43.43 | 42.45 | 45.57 | 51.10 | 51.37 | 53.65 | 56.81 | 55.40 | 50.23 | 50.43 | 45.45 | 49.26 | |||||||||||||
1998 | 47.23 | 45.67 | a | 45.94 | 45.97 | 49.87 | 53.00 | 52.39 | 52.90 | 53.27 | 46.68 | 45.37 | 40.33 | a | 48.22 | |||||||||||
1999 | 43.29 | 41.57 | 41.97 | 43.63 | 45.16 | 48.80 | 51.23 | 53.65 | 51.70 | 48.29 | 47.23 | 41.81 | 46.53 | |||||||||||||
2000 | 44.81 | 46.41 | 44.10 | 46.63 | 49.29 | 51.87 | 53.03 | 52.35 | 52.10 | 49.29 | 43.40 | 46.26 | 48.30 | |||||||||||||
2001 | 41.16 | 42.93 | 45.90 | 43.87 | 45.88 | w | 47.81 | n | 52.74 | 52.58 | 51.00 | 49.74 | ----- | z | ----- | z | 47.49 | d | ||||||||
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.86 | c | 52.58 | e | 46.50 | h | 43.67 | j | 38.53 | m | 41.18 | n | 51.72 | j |
2003 | 48.05 | j | 40.93 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.28 | e | 46.79 | b | 43.56 | c | 44.97 | a | 46.65 | h |
2004 | 42.87 | 40.52 | 43.72 | b | 44.61 | b | 48.42 | 49.83 | 55.06 | 55.29 | c | 46.47 | 46.90 | 43.93 | 42.06 | 46.64 | ||||||||||
2005 | 41.74 | 44.86 | 46.16 | 42.63 | 50.65 | 49.63 | 52.35 | 51.80 | a | 50.43 | 45.20 | a | 45.03 | a | 45.23 | 47.14 | ||||||||||
2006 | 41.30 | a | 39.41 | a | 39.47 | a | 46.23 | 48.03 | 51.77 | 51.90 | a | 53.07 | a | 47.50 | 46.35 | 43.90 | 40.13 | 45.75 | ||||||||
2007 | 34.97 | b | 42.71 | 39.77 | 42.03 | a | 46.71 | 48.40 | 53.42 | 53.35 | 49.57 | 45.58 | 42.62 | a | 38.81 | 44.83 | ||||||||||
2008 | 40.65 | 40.14 | a | 38.97 | 39.60 | 44.58 | 46.23 | 51.58 | 52.80 | a | 47.97 | 44.97 | 46.40 | 39.81 | 44.47 | |||||||||||
2009 | 44.03 | 42.57 | 42.26 | 43.57 | 47.29 | 51.70 | c | 52.73 | a | 53.10 | a | 50.83 | 48.23 | a | 41.60 | 41.19 | 46.59 | |||||||||
2010 | 45.81 | 45.04 | 41.42 | 42.83 | 45.03 | 50.40 | 52.65 | 52.35 | 49.73 | 48.13 | 42.97 | a | 45.52 | 46.82 | ||||||||||||
2011 | 43.47 | a | 38.93 | a | 44.52 | 44.03 | 46.90 | 49.93 | 52.29 | 53.10 | 51.10 | a | 50.10 | 42.57 | 36.81 | 46.14 | ||||||||||
2012 | 41.13 | 40.48 | 41.90 | a | 45.50 | 46.00 | 47.55 | a | 52.58 | 51.42 | 49.77 | 49.37 | a | 48.37 | 43.55 | 46.47 | ||||||||||
2013 | 42.81 | 38.56 | a | 43.32 | 43.93 | b | 48.35 | 50.10 | 53.90 | 55.90 | 52.37 | 45.76 | b | 43.80 | 39.39 | 46.52 | ||||||||||
2014 | 41.48 | 44.32 | 45.77 | 45.83 | 48.48 | b | 49.86 | a | 55.81 | 57.43 | a | 57.27 | 50.90 | a | 47.73 | 48.70 | a | 49.47 | ||||||||
2015 | 45.29 | 47.07 | 45.16 | 44.20 | 50.81 | 53.03 | a | 56.68 | 58.03 | 50.87 | 51.45 | 41.23 | 41.93 | a | 48.81 | |||||||||||
2016 | 47.10 | a | 44.32 | a | 46.90 | 48.03 | 50.94 | 50.38 | a | 51.39 | 55.06 | 50.46 | b | 49.35 | 46.76 | a | 40.26 | 48.41 | ||||||||
2017 | 43.19 | 46.22 | a | 44.23 | a | 45.70 | 47.97 | 52.30 | 51.90 | 56.29 | 54.27 | 45.55 | 46.30 | 41.65 | 47.96 | |||||||||||
2018 | 45.58 | 37.71 | 43.16 | 45.30 | 49.94 | 49.63 | 54.06 | 54.32 | 51.20 | 48.55 | 42.70 | 43.58 | 47.15 | |||||||||||||
2019 | 45.52 | 41.68 | 44.61 | 48.50 | 50.55 | 52.20 | 54.24 | b | 56.32 | 52.93 | a | 43.19 | 42.13 | 46.19 | 48.17 | |||||||||||
2020 | 42.97 | 40.38 | 44.03 | 47.53 | 48.71 | 50.97 | 53.35 | 54.90 | 54.30 | 47.97 | 40.80 | 40.55 | 47.21 | |||||||||||||
2021 | 42.03 | a | 41.07 | 40.63 | a | 45.80 | 46.13 | 52.13 | 54.10 | 54.81 | 52.47 | 47.26 | 47.37 | 44.23 | 47.34 | |||||||||||
2022 | 41.93 | a | 37.93 | 41.39 | 42.93 | a | 46.00 | 49.77 | 53.90 | a | 55.19 | 53.50 | 49.74 | 39.83 | a | 43.10 | 46.27 | |||||||||
2023 | 44.27 | a | 37.68 | 41.84 | 43.97 | 50.16 | 52.00 | 52.93 | a | 55.29 | 54.07 | 49.10 | 46.40 | 46.03 | a | 47.81 | ||||||||||
2024 | 45.19 | 45.03 | 46.16 | 44.10 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.46 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 42.97 | 43.24 | 43.84 | 44.70 | 47.59 | 50.00 | 52.17 | 53.12 | 51.46 | 48.26 | 45.30 | 43.30 | 47.12 | |||||||||||||
S.D. | 2.76 | 2.93 | 2.41 | 1.99 | 2.09 | 1.85 | 1.78 | 2.01 | 2.19 | 2.04 | 2.39 | 2.70 | 1.18 | |||||||||||||
SKEW | -0.50 | 0.05 | 0.03 | -0.48 | -0.22 | -0.05 | -0.31 | -0.31 | -0.40 | -0.27 | -0.22 | -0.34 | -0.21 | |||||||||||||
MAX | 48.00 | 49.59 | 49.19 | 48.50 | 52.29 | 55.10 | 56.68 | 58.03 | 57.27 | 52.52 | 50.43 | 48.70 | 49.47 | |||||||||||||
MIN | 34.52 | 37.68 | 38.81 | 39.60 | 41.52 | 45.27 | 47.13 | 46.65 | 44.42 | 42.81 | 39.83 | 35.61 | 44.29 | |||||||||||||
YRS | 81 | 80 | 80 | 79 | 79 | 80 | 81 | 80 | 82 | 84 | 79 | 79 | 65 |