YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1935 | ----- | z | ----- | z | ----- | z | ----- | z | 54.56 | 60.47 | 62.06 | 63.65 | 61.15 | 50.20 | a | 39.39 | c | 38.81 | 53.79 | d | ||||||
1936 | 41.32 | 34.14 | 42.79 | 52.53 | a | 57.39 | 61.12 | 63.84 | 65.69 | 59.08 | 54.03 | 41.33 | 41.16 | 51.20 | ||||||||||||
1937 | 29.08 | 38.82 | 47.26 | 46.88 | 55.31 | 61.47 | 63.87 | 62.42 | 60.13 | 52.81 | 46.12 | 40.47 | 50.39 | |||||||||||||
1938 | 38.81 | 40.16 | 42.78 | a | 50.60 | 55.26 | 60.25 | 63.26 | 59.90 | 60.63 | 52.34 | 41.28 | 39.42 | 50.39 | ||||||||||||
1939 | 40.97 | 38.41 | 45.21 | 51.67 | 55.63 | 57.08 | 63.48 | a | 64.66 | 60.35 | 52.63 | 45.90 | a | 44.31 | 51.69 | |||||||||||
1940 | 39.89 | 43.97 | 48.63 | 51.72 | 58.65 | 62.70 | 63.21 | 65.18 | 61.88 | 54.94 | 40.97 | 41.13 | 52.74 | |||||||||||||
1941 | 40.69 | 44.93 | 50.48 | 52.13 | 55.35 | a | 59.97 | a | 67.08 | 63.95 | 57.65 | 52.73 | 46.12 | 40.58 | 52.64 | |||||||||||
1942 | 35.58 | 41.59 | 44.89 | 50.82 | 54.56 | 58.35 | 65.31 | 65.77 | 60.73 | 53.71 | 42.97 | 41.73 | 51.33 | |||||||||||||
1943 | 33.55 | 43.11 | 43.94 | 51.50 | 52.24 | 57.67 | 62.48 | 62.19 | 62.93 | 52.79 | 44.92 | 38.66 | 50.50 | |||||||||||||
1944 | 39.05 | 41.55 | 44.00 | 49.52 | 54.42 | 58.37 | 62.97 | 63.27 | 62.37 | 55.46 | c | 44.22 | 37.52 | 51.06 | ||||||||||||
1945 | 41.50 | 42.75 | 43.06 | 47.07 | 55.61 | 58.90 | 64.45 | a | 63.42 | 58.65 | 53.45 | 44.15 | 39.81 | 51.07 | ||||||||||||
1946 | 40.02 | 41.25 | 45.22 | a | 48.37 | 56.88 | a | 57.82 | 63.27 | 63.29 | 59.48 | 49.41 | b | 41.73 | 40.92 | 50.64 | ||||||||||
1947 | 35.34 | 44.70 | 48.55 | 52.48 | 58.02 | 58.53 | 62.16 | 62.18 | 60.62 | 53.63 | 45.40 | 41.28 | a | 51.91 | ||||||||||||
1948 | 37.47 | a | 38.16 | 42.37 | 45.27 | 52.35 | 61.65 | 61.85 | 60.31 | 58.65 | 49.90 | 41.70 | 35.10 | 48.73 | ||||||||||||
1949 | 28.16 | 37.14 | 44.70 | a | 49.65 | 55.48 | 57.60 | 61.35 | a | 62.77 | 62.20 | 48.60 | 48.60 | 38.68 | a | 49.58 | ||||||||||
1950 | 27.40 | 38.25 | 42.92 | 47.48 | 52.32 | 60.02 | 63.13 | 65.31 | 60.55 | 50.21 | 44.75 | 45.68 | 49.83 | |||||||||||||
1951 | 38.15 | 41.55 | 40.56 | 51.72 | 55.32 | 61.53 | 63.35 | 63.39 | 60.62 | 52.39 | 44.03 | 37.26 | 50.82 | |||||||||||||
1952 | 35.71 | 40.79 | 42.68 | 50.27 | 54.90 | 57.73 | 64.07 | a | 63.08 | 62.58 | 57.56 | 41.40 | 40.31 | 50.92 | ||||||||||||
1953 | 45.23 | 42.21 | 44.42 | 47.93 | 53.34 | 56.27 | 63.56 | 64.10 | 61.13 | 53.55 | 47.30 | 42.39 | 51.79 | |||||||||||||
1954 | 36.10 | 41.71 | 42.77 | 47.18 | 54.26 | 55.80 | 59.97 | 60.84 | 59.12 | 51.63 | 48.10 | 39.63 | 49.76 | |||||||||||||
1955 | 38.37 | 39.62 | 40.06 | 44.38 | a | 51.22 | a | 57.40 | 59.40 | 62.45 | 59.27 | 51.65 | 39.80 | 38.75 | a | 48.53 | ||||||||||
1956 | 38.92 | 35.07 | 42.39 | 51.27 | 57.10 | 56.25 | 64.79 | 63.60 | a | 60.02 | 49.87 | 42.42 | 39.40 | 50.09 | ||||||||||||
1957 | 31.65 | 39.65 | a | 45.26 | 50.37 | 56.89 | 59.70 | 62.71 | 62.47 | 64.57 | 52.60 | 42.90 | 42.10 | a | 50.90 | |||||||||||
1958 | 42.82 | 47.89 | 44.16 | 49.78 | 58.79 | 63.10 | 67.48 | 66.65 | 60.65 | 55.15 | 44.68 | 44.23 | 53.78 | |||||||||||||
1959 | 40.68 | 41.16 | 44.81 | 50.30 | 53.76 | 59.00 | 64.52 | 62.34 | 57.77 | 52.89 | 43.78 | a | 39.95 | 50.91 | ||||||||||||
1960 | 36.52 | a | 41.69 | 43.98 | 49.52 | 51.79 | 59.77 | 64.37 | 61.92 | 59.90 | 53.26 | 44.15 | 38.50 | 50.45 | ||||||||||||
1961 | 43.47 | 44.57 | 45.42 | 47.37 | 54.35 | 61.98 | 65.02 | 65.73 | 58.67 | 51.23 | 41.27 | 39.56 | 51.55 | |||||||||||||
1962 | 36.94 | 42.64 | 42.79 | 49.77 | 49.85 | 57.37 | 61.31 | 62.50 | 60.50 | 53.35 | 46.62 | 41.56 | 50.43 | |||||||||||||
1963 | 34.29 | 47.20 | 44.40 | 48.27 | 54.71 | 57.35 | 60.66 | 63.06 | 62.95 | 54.06 | 45.15 | 40.29 | 51.03 | |||||||||||||
1964 | 40.98 | 41.45 | 43.97 | 46.22 | 51.11 | 57.02 | 61.35 | 61.52 | 58.85 | 52.73 | 41.77 | 36.87 | 49.49 | |||||||||||||
1965 | 39.55 | 42.61 | 46.74 | 50.07 | 51.31 | 57.68 | 63.32 | 64.18 | 59.18 | 55.16 | 47.20 | 38.63 | 51.30 | |||||||||||||
1966 | 39.34 | 41.30 | 44.68 | 49.75 | f | 53.94 | 58.47 | 61.94 | 64.06 | 61.80 | 52.63 | 46.13 | 43.10 | 51.58 | a | |||||||||||
1967 | 42.56 | 42.96 | 42.68 | 45.12 | 54.24 | 61.68 | 63.63 | 68.47 | 64.30 | 53.76 | 46.07 | 39.32 | 52.07 | |||||||||||||
1968 | 39.29 | 46.31 | 47.48 | 47.37 | 54.29 | 58.77 | 64.27 | 62.05 | 60.38 | 50.97 | 45.07 | 36.74 | 51.08 | |||||||||||||
1969 | 31.44 | g | 38.68 | 45.85 | 48.58 | 57.08 | 62.25 | 62.35 | 62.21 | 60.00 | 51.16 | 44.95 | 40.94 | 52.19 | a | |||||||||||
1970 | 39.92 | 45.16 | 45.81 | 46.08 | 54.08 | 60.75 | 63.02 | 63.06 | 57.73 | 50.41 | b | 44.35 | 38.11 | 50.71 | ||||||||||||
1971 | 38.39 | 41.14 | 41.74 | 47.42 | 53.95 | 54.78 | 62.37 | 65.85 | 58.28 | 50.37 | 44.68 | 37.61 | 49.72 | |||||||||||||
1972 | 37.06 | 41.57 | 46.29 | 45.28 | 57.12 | a | 59.08 | 64.89 | 66.05 | 58.38 | d | 50.82 | a | 45.32 | 36.05 | 50.66 | ||||||||||
1973 | 37.63 | 43.55 | 45.39 | 49.58 | 54.95 | b | 58.05 | 63.00 | 60.64 | i | 60.90 | 51.88 | b | 41.36 | b | 43.32 | 49.96 | a | ||||||||
1974 | 36.89 | 41.50 | 45.00 | 48.93 | c | 51.42 | 58.78 | 62.16 | 64.29 | 64.40 | 52.92 | 46.50 | 43.11 | 51.32 | ||||||||||||
1975 | 40.52 | 41.25 | 43.55 | 45.63 | 54.15 | 56.63 | 62.47 | 61.06 | 61.63 | 50.98 | 43.82 | 40.48 | d | 50.18 | ||||||||||||
1976 | 40.63 | 40.13 | b | 43.08 | a | 48.18 | 53.85 | 56.90 | a | 62.13 | 61.50 | 61.64 | a | 52.97 | a | 46.69 | a | 39.74 | d | 50.62 | ||||||
1977 | 36.76 | 44.70 | 43.58 | 50.77 | 51.02 | d | 59.95 | 60.90 | 66.05 | 58.73 | b | 52.19 | 43.09 | b | 41.55 | a | 50.77 | |||||||||
1978 | 42.03 | 45.42 | c | 48.24 | 49.33 | a | 53.39 | 61.58 | 64.47 | b | 63.47 | b | 58.88 | a | 53.79 | 39.33 | 35.79 | 51.31 | ||||||||
1979 | 32.06 | 40.50 | 48.68 | 49.85 | 56.37 | 59.18 | b | 64.74 | 63.92 | 63.38 | 55.47 | 43.37 | 43.73 | 51.77 | ||||||||||||
1980 | 35.24 | 44.19 | 44.86 | b | 51.82 | 53.97 | 57.02 | 63.65 | 61.63 | 60.37 | 53.89 | 46.77 | 43.45 | 51.40 | ||||||||||||
1981 | 43.03 | 43.81 | a | 48.62 | b | 49.88 | 53.81 | 57.62 | 61.79 | 66.37 | 60.92 | 51.66 | 46.60 | 42.08 | 52.18 | |||||||||||
1982 | 39.18 | a | 41.96 | b | 44.91 | b | 46.28 | 54.10 | 60.05 | 60.77 | 62.82 | 61.03 | 53.89 | 42.76 | c | 39.45 | c | 50.60 | ||||||||
1983 | 43.26 | 45.62 | 48.48 | a | 50.07 | 55.29 | 57.72 | 61.63 | 64.11 | 57.37 | 51.73 | 45.82 | 34.68 | 51.31 | ||||||||||||
1984 | 41.10 | 43.83 | 48.22 | a | 46.97 | 51.53 | 56.53 | 61.85 | 62.60 | 59.41 | a | 49.76 | 43.63 | 35.82 | 50.10 | |||||||||||
1985 | 35.47 | 38.98 | 43.24 | 49.68 | 54.63 | 60.38 | 67.13 | 63.92 | 57.68 | 50.45 | 36.25 | 33.77 | 49.30 | |||||||||||||
1986 | 42.52 | 42.24 | a | 49.42 | 48.35 | 54.44 | 61.95 | 61.03 | 66.87 | 58.00 | a | 53.90 | 45.88 | a | ----- | z | 53.15 | a | ||||||||
1987 | 39.71 | b | 44.60 | d | 47.03 | b | 51.18 | 57.24 | 59.88 | a | 63.15 | 64.76 | 61.03 | 54.07 | a | 47.50 | a | 38.53 | 52.39 | |||||||
1988 | 39.00 | c | 44.11 | b | 45.67 | a | 50.25 | 53.48 | 57.83 | 63.57 | a | 63.19 | 59.30 | 55.58 | a | 45.39 | b | 39.93 | c | 51.44 | ||||||
1989 | 40.83 | a | 33.62 | c | 44.05 | a | 52.60 | a | 54.61 | 61.48 | 61.72 | a | 63.16 | 61.53 | 52.42 | a | 46.14 | a | 41.48 | a | 51.14 | |||||
1990 | 41.85 | 38.96 | 47.98 | a | 51.72 | 53.73 | 59.27 | 66.00 | 66.08 | 62.95 | 50.26 | b | 45.24 | a | 32.92 | 51.41 | ||||||||||
1991 | 38.08 | a | 47.18 | 43.24 | 47.78 | a | 52.50 | 56.63 | 63.92 | 64.23 | 61.59 | c | 51.53 | 45.81 | a | 41.35 | 51.15 | |||||||||
1992 | 42.48 | 47.17 | 49.83 | a | 51.91 | a | 57.75 | a | 62.50 | 65.16 | 64.78 | a | 57.75 | b | 53.32 | a | 44.57 | a | 38.79 | 53.00 | ||||||
1993 | 34.79 | c | 38.04 | 47.02 | a | 49.38 | 58.43 | c | 59.02 | 60.69 | b | 63.94 | 60.50 | 53.79 | 39.09 | a | 39.39 | 50.34 | ||||||||
1994 | 43.61 | 38.75 | 47.87 | 50.82 | b | 55.65 | a | 57.52 | a | 63.89 | 63.62 | a | 61.95 | a | 49.67 | a | 40.37 | 40.24 | 51.16 | |||||||
1995 | 42.08 | a | 44.91 | a | 45.05 | a | 47.95 | 56.44 | 59.45 | 64.65 | 61.72 | a | 63.05 | 51.18 | 48.84 | a | 40.97 | 52.19 | ||||||||
1996 | 40.12 | a | 40.67 | 46.02 | 50.62 | 51.48 | 57.72 | 65.02 | 63.02 | 54.32 | 47.03 | 40.33 | 39.77 | 49.68 | ||||||||||||
1997 | 39.98 | 41.98 | 44.84 | 47.97 | 57.27 | 58.42 | 62.50 | a | 65.69 | 61.52 | 50.81 | 46.90 | 39.24 | 51.43 | ||||||||||||
1998 | 41.19 | 44.25 | 46.66 | 48.18 | 53.63 | 59.17 | 65.69 | 64.31 | 61.08 | 50.95 | 45.97 | 38.06 | 51.60 | |||||||||||||
1999 | 40.82 | 41.29 | 43.31 | 46.70 | 50.81 | 56.32 | 60.68 | 63.23 | 58.60 | 50.66 | 47.13 | 41.68 | 50.10 | |||||||||||||
2000 | 38.10 | 42.00 | 43.18 | 50.25 | 53.52 | 59.37 | 62.65 | 61.80 | a | 58.57 | 50.89 | 40.13 | 39.06 | 49.96 | ||||||||||||
2001 | 39.61 | 39.50 | 44.73 | 46.41 | a | 53.24 | 56.43 | 60.94 | 62.85 | 58.98 | 50.19 | 45.60 | 39.61 | 49.84 | ||||||||||||
2002 | 39.61 | 41.32 | 41.61 | 48.22 | 51.02 | 59.12 | 63.50 | 62.97 | 59.28 | 50.65 | 45.09 | a | 41.31 | 50.31 | ||||||||||||
2003 | 43.31 | 41.02 | h | 46.21 | 47.77 | 53.03 | 60.73 | 64.61 | 63.43 | a | 60.63 | 55.06 | 41.15 | 40.65 | 52.42 | a | ||||||||||
2004 | 37.87 | 42.45 | 47.32 | 50.68 | 55.95 | 60.38 | 65.90 | 66.03 | 58.55 | 52.81 | 42.75 | 41.03 | 51.81 | |||||||||||||
2005 | 40.56 | 41.11 | 47.52 | b | 49.43 | 56.77 | 58.00 | 63.53 | 64.98 | 57.03 | 52.79 | 41.87 | 38.32 | 50.99 | ||||||||||||
2006 | 42.92 | 39.23 | 43.74 | 48.92 | 54.40 | 60.18 | 64.19 | 62.45 | 59.92 | 50.18 | a | 43.47 | 38.87 | 50.71 | ||||||||||||
2007 | 36.66 | 42.68 | 46.52 | 48.07 | a | 53.21 | 57.30 | 64.44 | 63.02 | 57.77 | 49.31 | 42.77 | 38.87 | 50.05 | ||||||||||||
2008 | 36.29 | 42.34 | 42.37 | 44.58 | 54.58 | 56.20 | 62.34 | b | 63.85 | a | 58.98 | 50.21 | 47.10 | 35.02 | 49.49 | |||||||||||
2009 | 37.55 | a | 39.50 | 41.53 | 47.52 | 53.61 | 60.38 | a | 65.69 | 63.19 | 60.23 | 50.40 | 44.85 | 33.84 | 49.86 | |||||||||||
2010 | 44.42 | 44.66 | 45.23 | 47.85 | 50.89 | 56.78 | 61.34 | 62.42 | 59.70 | 51.65 | 42.67 | 41.55 | 50.76 | |||||||||||||
2011 | 39.52 | 38.00 | 43.19 | 44.22 | 50.34 | 57.13 | 61.21 | 63.35 | 61.83 | 51.79 | 41.97 | 37.37 | 49.16 | |||||||||||||
2012 | 38.26 | 41.33 | 42.53 | 48.82 | 52.47 | 55.90 | 61.61 | 64.39 | 59.98 | 51.44 | 46.25 | 41.16 | 50.34 | |||||||||||||
2013 | 35.58 | 42.38 | 45.50 | 49.17 | 55.06 | 59.55 | 63.73 | 64.32 | 61.15 | 49.42 | 43.60 | 34.71 | 50.35 | |||||||||||||
2014 | 39.92 | 38.34 | 46.50 | 48.58 | 55.95 | 58.77 | 65.29 | 66.73 | 62.17 | 56.48 | 43.85 | 41.87 | 52.04 | |||||||||||||
2015 | 41.13 | 46.21 | 48.16 | 47.35 | 55.71 | 61.63 | 66.85 | 65.63 | 58.32 | 54.53 | 41.77 | 40.52 | 52.32 | |||||||||||||
2016 | 41.03 | 45.53 | 46.63 | 53.10 | 56.82 | 60.12 | 63.42 | 65.89 | 58.72 | 53.10 | 49.05 | 36.06 | 52.46 | |||||||||||||
2017 | 33.24 | 40.50 | 44.50 | 47.65 | 55.11 | 59.60 | 62.58 | 66.05 | 62.07 | 50.40 | 45.03 | 37.65 | 50.37 | |||||||||||||
2018 | 44.00 | 39.95 | 43.06 | 49.95 | 56.87 | 59.47 | a | 65.61 | 65.45 | 58.28 | 51.94 | 44.92 | 41.02 | 51.71 | ||||||||||||
2019 | 41.16 | 35.91 | 42.74 | 50.62 | 56.97 | 59.92 | 63.47 | 64.81 | 60.23 | 47.66 | 43.60 | 40.61 | 50.64 | |||||||||||||
2020 | 43.27 | 41.59 | 42.58 | 49.73 | 55.73 | a | 58.97 | 62.42 | 64.63 | 62.93 | 52.65 | a | 43.93 | 42.48 | 51.74 | |||||||||||
2021 | 42.56 | 39.89 | 42.40 | 50.03 | 53.81 | 63.07 | 64.40 | a | 64.52 | 59.57 | 50.16 | 46.92 | 38.65 | a | 51.33 | |||||||||||
2022 | 40.05 | a | 41.27 | 46.50 | 45.48 | 51.08 | 59.59 | a | 65.40 | 67.56 | 62.88 | 56.29 | 41.23 | 38.37 | 51.31 | |||||||||||
2023 | 41.48 | 39.04 | 42.27 | 47.58 | 58.05 | 59.03 | 64.74 | 68.45 | 59.13 | 53.05 | 43.65 | 43.44 | 51.66 | |||||||||||||
2024 | 40.24 | 43.66 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.95 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.02 | 41.68 | 44.96 | 48.92 | 54.47 | 59.00 | 63.33 | 63.89 | 60.23 | 52.18 | 44.10 | 39.64 | 50.93 | |||||||||||||
S.D. | 3.52 | 2.89 | 2.26 | 2.09 | 2.12 | 1.89 | 1.70 | 1.73 | 1.85 | 2.00 | 2.49 | 2.55 | 0.97 | |||||||||||||
SKEW | -1.06 | -0.26 | 0.31 | -0.22 | -0.08 | 0.19 | 0.17 | 0.34 | 0.02 | 0.14 | -0.44 | -0.38 | 0.12 | |||||||||||||
MAX | 45.23 | 47.89 | 50.48 | 53.10 | 58.79 | 63.10 | 67.48 | 68.47 | 64.57 | 57.56 | 49.05 | 45.68 | 53.78 | |||||||||||||
MIN | 27.40 | 33.62 | 40.06 | 44.22 | 49.85 | 54.78 | 59.40 | 59.90 | 54.32 | 47.03 | 36.25 | 32.92 | 48.53 | |||||||||||||
YRS | 88 | 88 | 88 | 87 | 89 | 89 | 89 | 88 | 89 | 89 | 89 | 88 | 83 |