YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.66 | 70.98 | 59.19 | 43.98 | 40.27 | 57.82 | g | |||||
1949 | 29.52 | 36.91 | 45.18 | 55.39 | c | 61.11 | 69.52 | 74.94 | 73.35 | 70.80 | 54.85 | 55.12 | 38.98 | 55.47 | ||||||||||||
1950 | 38.48 | 46.30 | 48.15 | 57.52 | 60.95 | 70.08 | 73.68 | 74.66 | 66.55 | 66.02 | 53.43 | 48.68 | 58.71 | |||||||||||||
1951 | 39.95 | 42.00 | 45.39 | 52.32 | 61.10 | 69.05 | 78.26 | 73.23 | 69.97 | 58.29 | 46.13 | 38.73 | 56.20 | |||||||||||||
1952 | 39.24 | 41.21 | 39.65 | 53.22 | 63.60 | 68.10 | 74.05 | 74.97 | 69.37 | 60.90 | a | 41.03 | 37.61 | 55.24 | ||||||||||||
1953 | 43.08 | 39.20 | 45.71 | 50.52 | 54.02 | 68.77 | 75.77 | 72.19 | 69.54 | c | 56.60 | 47.93 | 36.42 | 54.98 | ||||||||||||
1954 | 39.19 | 45.98 | 44.18 | 56.13 | 61.29 | 68.35 | 76.26 | 70.98 | b | 68.55 | 58.76 | 49.13 | 39.06 | 56.49 | ||||||||||||
1955 | 33.79 | 36.39 | 45.74 | 50.52 | a | 60.40 | 65.83 | 71.29 | 71.73 | a | 66.40 | 59.82 | 45.72 | 41.76 | 54.12 | |||||||||||
1956 | 41.06 | 35.91 | 46.45 | a | 50.64 | e | 60.58 | 70.55 | 71.73 | 67.82 | 70.36 | a | 56.19 | 43.93 | 40.27 | 54.63 | ||||||||||
1957 | 39.97 | 48.89 | 47.48 | 50.52 | 55.73 | 69.72 | 75.35 | 71.19 | 66.50 | 54.94 | 42.06 | d | 42.29 | 55.39 | ||||||||||||
1958 | 39.71 | 44.41 | 41.27 | 50.23 | 63.55 | a | 69.73 | 75.47 | 75.10 | 67.48 | 57.63 | 45.28 | 44.16 | 56.17 | ||||||||||||
1959 | 40.97 | 39.50 | 46.79 | 55.30 | 57.61 | 73.03 | 77.90 | 71.81 | 65.45 | 56.84 | 47.02 | 40.85 | a | 56.09 | ||||||||||||
1960 | 33.76 | 37.31 | 49.65 | 53.57 | a | 59.71 | 71.97 | 76.29 | 74.40 | 69.67 | 54.61 | 46.37 | 38.71 | 55.50 | ||||||||||||
1961 | 41.73 | 43.37 | a | 44.68 | 53.73 | 59.15 | 72.68 | 77.00 | 73.52 | 63.88 | 55.19 | 44.07 | 38.73 | 55.64 | ||||||||||||
1962 | 38.18 | 41.73 | 40.34 | 56.62 | 58.15 | 68.08 | 74.69 | 75.60 | 68.13 | 58.34 | 50.42 | 42.98 | 56.10 | |||||||||||||
1963 | 36.47 | 46.77 | 45.16 | 50.28 | 63.42 | 67.33 | 78.26 | 71.69 | 68.67 | 60.10 | 47.65 | 40.65 | 56.37 | |||||||||||||
1964 | 35.48 | a | 36.47 | 41.85 | 49.73 | 61.16 | 68.62 | 76.90 | 72.84 | 65.45 | 60.82 | 42.48 | 38.90 | 54.23 | ||||||||||||
1965 | 41.73 | 40.46 | 42.69 | 50.78 | 56.68 | 63.63 | 75.18 | 72.71 | 63.23 | 59.44 | 49.20 | 38.79 | 54.54 | |||||||||||||
1966 | 36.42 | 36.62 | 48.02 | 55.13 | 64.27 | 69.95 | 77.18 | 73.29 | 67.53 | 55.71 | 48.78 | 38.97 | 55.99 | |||||||||||||
1967 | 39.11 | 44.20 | a | 48.32 | 48.63 | 59.03 | 66.68 | 75.37 | 73.00 | a | 67.08 | 58.98 | 49.00 | 33.87 | 55.27 | |||||||||||
1968 | 37.47 | 46.21 | 46.13 | 50.67 | 59.61 | 69.41 | a | 73.22 | a | 69.44 | 65.19 | a | 58.19 | 45.55 | a | 34.90 | 54.67 | |||||||||
1969 | 42.39 | 38.50 | 41.74 | 52.98 | 60.89 | 66.57 | a | 75.73 | 77.22 | a | 68.67 | 54.08 | 46.75 | 41.15 | 55.55 | |||||||||||
1970 | 36.95 | 44.23 | 43.55 | a | 47.05 | 60.43 | b | 68.78 | 76.52 | 75.23 | a | 63.87 | 52.68 | 46.92 | 39.26 | 54.62 | ||||||||||
1971 | 38.63 | 41.36 | 47.45 | 50.90 | 56.67 | a | 68.02 | 77.40 | 72.76 | 65.64 | a | 52.73 | 44.75 | 35.92 | 54.35 | |||||||||||
1972 | 38.34 | 42.93 | 53.39 | 54.03 | 60.55 | 69.57 | 76.93 | a | 73.12 | a | 66.47 | 56.23 | a | 41.83 | 37.52 | 55.91 | ||||||||||
1973 | 35.69 | 40.75 | 39.60 | 48.80 | 61.39 | 69.83 | a | 73.67 | b | 73.48 | ----- | z | 57.52 | a | 46.17 | a | 40.24 | 53.38 | a | |||||||
1974 | 38.63 | 39.63 | a | 47.88 | b | 52.32 | 61.55 | 73.42 | 74.45 | a | 71.92 | a | 66.25 | 57.93 | a | 45.57 | 35.55 | a | 55.42 | |||||||
1975 | 38.16 | 39.82 | 43.00 | 45.40 | 57.50 | 66.27 | 74.68 | 73.48 | 67.27 | 57.11 | 45.58 | 40.48 | 54.06 | |||||||||||||
1976 | 39.34 | 43.53 | 44.31 | 49.77 | 60.76 | 68.30 | 73.84 | 71.08 | 64.10 | 54.29 | 46.05 | 38.68 | 54.50 | |||||||||||||
1977 | 37.95 | 43.43 | 42.00 | 53.00 | 56.23 | 70.58 | 75.94 | 74.21 | 68.12 | 58.55 | 48.30 | 43.03 | 55.94 | |||||||||||||
1978 | 39.82 | 41.38 | 48.84 | 51.73 | 58.90 | 70.42 | 75.63 | a | 72.53 | 66.47 | 60.06 | 45.77 | 36.11 | 55.64 | ||||||||||||
1979 | 33.81 | 39.32 | 44.03 | 51.95 | 60.35 | 69.78 | 73.23 | 71.26 | 70.70 | 58.82 | 43.23 | 41.32 | 54.82 | |||||||||||||
1980 | 41.02 | 44.26 | 44.10 | a | 52.28 | 56.06 | 68.93 | 76.66 | 72.74 | 68.15 | 56.92 | 47.92 | 45.05 | 56.17 | ||||||||||||
1981 | 42.48 | 43.91 | 45.55 | 56.83 | 60.53 | 72.92 | 75.61 | 74.81 | 68.00 | 55.03 | 48.60 | 42.05 | 57.19 | |||||||||||||
1982 | 37.64 | j | 42.48 | h | 44.27 | i | 52.44 | d | 59.19 | d | 66.34 | b | 74.25 | c | 74.00 | a | 67.54 | f | 54.60 | b | 45.24 | e | 37.65 | d | 57.96 | d |
1983 | 39.98 | c | 42.29 | d | 43.96 | f | 46.91 | h | 59.05 | b | 66.28 | c | 74.45 | c | 73.24 | b | 71.65 | c | 58.19 | e | 44.94 | c | 39.92 | a | 57.00 | b |
1984 | 40.88 | e | 40.85 | f | 46.85 | e | 51.43 | g | 65.57 | a | 68.42 | e | 74.46 | g | 73.34 | c | 68.60 | d | 52.44 | d | 43.70 | b | 38.70 | f | 57.47 | d |
1985 | 38.15 | h | 38.85 | e | 45.36 | j | 56.58 | 61.14 | c | 71.98 | 77.65 | 74.25 | a | 62.77 | b | 56.34 | 43.33 | c | 40.65 | 58.35 | b | |||||
1986 | 44.08 | a | 42.44 | c | 48.92 | a | 53.75 | 60.84 | 70.85 | 72.92 | 75.02 | 62.68 | 54.29 | b | 45.16 | b | 39.04 | e | 55.83 | |||||||
1987 | 35.92 | k | 39.95 | g | 43.12 | e | 56.14 | b | 61.06 | 71.07 | a | 73.15 | 73.11 | 67.63 | 61.34 | 45.36 | b | 36.63 | e | 58.86 | b | |||||
1988 | 37.73 | e | 44.92 | d | 46.75 | a | 53.28 | a | 60.15 | 71.23 | 75.56 | 72.52 | 64.53 | 60.85 | 44.86 | b | 36.81 | 55.77 | ||||||||
1989 | 36.33 | e | 42.80 | e | 48.98 | b | 57.20 | 61.53 | a | 70.20 | 76.37 | 72.97 | 68.75 | 56.47 | b | 47.38 | b | 39.61 | d | 56.55 | ||||||
1990 | 38.19 | g | 41.70 | h | 47.60 | b | 55.71 | a | 59.06 | 71.85 | 74.42 | 70.65 | 68.93 | 58.23 | a | 46.91 | c | 34.26 | h | 61.48 | c | |||||
1991 | 38.93 | c | 45.75 | h | 40.81 | e | 50.64 | a | 58.05 | 65.20 | 74.92 | 74.74 | 68.17 | a | 62.14 | c | 45.57 | b | 39.04 | e | 56.20 | a | ||||
1992 | 38.87 | d | 43.90 | c | 45.83 | a | 56.16 | a | 61.19 | 66.35 | 72.66 | 72.27 | 67.98 | 59.40 | a | 42.04 | d | 37.26 | h | 56.97 | a | |||||
1993 | 40.79 | j | 41.11 | e | 48.80 | c | 54.52 | b | 63.52 | 69.67 | a | 73.19 | 74.02 | 67.08 | 56.48 | 42.88 | e | 39.28 | f | 59.13 | b | |||||
1994 | 40.34 | c | 40.43 | f | 47.84 | b | 53.12 | a | 58.97 | 72.43 | 75.24 | 76.95 | 69.72 | 55.69 | 41.81 | c | 40.85 | e | 57.54 | a | ||||||
1995 | 39.27 | g | 47.10 | d | 47.57 | b | 50.62 | 56.60 | 67.71 | a | 75.42 | 77.23 | 70.42 | 59.65 | 52.38 | b | 42.32 | f | 60.47 | b | ||||||
1996 | 40.58 | f | 47.16 | d | 47.80 | d | 56.20 | 64.87 | 73.42 | 77.20 | a | 76.08 | 65.64 | a | 57.34 | 47.52 | c | 41.02 | d | 59.48 | a | |||||
1997 | 39.69 | g | 40.57 | g | 49.62 | b | 50.42 | e | 63.65 | d | 67.08 | 75.18 | f | 75.44 | f | 72.42 | d | 56.48 | e | 47.27 | f | 37.52 | h | 59.95 | f | |
1998 | 41.48 | c | 37.72 | e | 45.04 | f | 47.50 | c | 56.66 | f | 67.17 | f | 76.71 | e | 75.96 | e | 68.71 | b | 55.91 | i | 47.54 | e | 40.98 | f | 56.52 | e |
1999 | 41.94 | e | 45.47 | m | 48.31 | e | 46.50 | i | 60.94 | e | 69.84 | h | 74.33 | d | 74.36 | f | 67.90 | f | 59.96 | e | 51.00 | h | 41.36 | j | 57.10 | g |
2000 | 42.40 | e | 45.56 | e | 46.68 | a | 57.65 | f | 65.76 | d | 73.67 | c | 77.27 | c | 75.02 | b | 71.59 | g | 54.89 | h | 40.78 | e | 41.16 | c | 56.48 | c |
2001 | 38.56 | e | 41.33 | d | 48.25 | c | 53.43 | c | 65.43 | d | 72.54 | f | 75.56 | g | 73.72 | f | 70.50 | b | 60.88 | c | 49.19 | c | 37.81 | d | 51.71 | c |
2002 | 40.30 | d | 42.39 | e | 48.48 | e | 56.71 | f | 61.88 | b | 72.84 | e | 78.48 | d | 75.11 | d | 69.46 | f | 56.23 | e | 47.43 | b | 40.06 | f | 58.13 | c |
2003 | 46.24 | d | 41.10 | h | 45.85 | d | 52.27 | h | 63.06 | d | 71.87 | c | 78.83 | d | 76.06 | d | 68.57 | c | 62.59 | d | 46.50 | e | 39.46 | d | 59.90 | b |
2004 | 39.34 | f | 39.21 | e | 54.62 | f | 53.88 | d | 63.48 | c | 69.89 | c | 72.77 | e | 70.59 | c | 65.78 | e | 56.44 | g | 45.62 | i | 41.58 | e | 59.65 | d |
2005 | 42.00 | d | 43.33 | e | 46.06 | e | 53.30 | e | 62.65 | d | 69.45 | b | 76.72 | d | 72.24 | b | 68.12 | e | 58.46 | c | 49.37 | c | 41.35 | g | 58.34 | a |
2006 | 41.46 | f | 44.19 | d | 42.28 | h | 54.50 | e | 64.59 | d | 74.76 | e | 76.42 | f | 72.96 | d | 64.52 | e | 56.24 | h | 49.27 | h | 38.98 | h | 62.59 | f |
2007 | 37.05 | i | 41.89 | i | 49.16 | f | 55.08 | f | 63.81 | b | 73.13 | g | 77.70 | h | 76.02 | c | 69.06 | f | 58.78 | d | 52.20 | c | 39.68 | n | 62.70 | h |
2008 | ----- | z | 43.69 | m | 48.17 | a | 53.02 | 58.13 | 71.47 | 74.84 | 74.00 | 68.18 | 58.72 | a | 48.98 | a | 39.58 | 59.51 | b | |||||||
2009 | 42.59 | d | 42.18 | 47.90 | b | 52.23 | 64.79 | 63.50 | u | ----- | z | 73.06 | v | 68.59 | a | 57.15 | d | 48.29 | a | 36.21 | 51.10 | c | ||||
2010 | 39.20 | a | 41.11 | a | 44.74 | 51.59 | b | 58.73 | a | 68.55 | 76.06 | 74.35 | 69.67 | 58.98 | 44.40 | 42.87 | 55.86 | |||||||||
2011 | 38.65 | 38.52 | 47.97 | 54.45 | 57.60 | 67.97 | 75.00 | 76.73 | 69.57 | 58.58 | 45.03 | 37.87 | 55.66 | |||||||||||||
2012 | 41.42 | 41.60 | 46.15 | 55.07 | 62.21 | 71.03 | 75.21 | 75.50 | 68.18 | 58.00 | 49.33 | 38.94 | 56.89 | |||||||||||||
2013 | 37.13 | 39.02 | 49.03 | 53.65 | 60.24 | 71.17 | 75.21 | 74.08 | 68.03 | 53.79 | 47.78 | 39.48 | 55.72 | |||||||||||||
2014 | 42.73 | 44.20 | 49.23 | 53.57 | 60.58 | 70.03 | 75.52 | 72.15 | 69.50 | 59.71 | 46.97 | 41.69 | 57.15 | |||||||||||||
2015 | 41.85 | 47.46 | 51.52 | 53.07 | 57.47 | 73.03 | 74.50 | 76.50 | 71.00 | 61.48 | 45.00 | 37.71 | 57.55 | |||||||||||||
2016 | 38.48 | 46.78 | 50.26 | 54.50 | 60.27 | 74.02 | 76.39 | 72.79 | 68.43 | 61.39 | 50.32 | 42.76 | 58.03 | |||||||||||||
2017 | 39.56 | 45.55 | 52.16 | 55.07 | 61.87 | 73.53 | 75.66 | 74.55 | 68.13 | 61.19 | 53.23 | 44.26 | 58.73 | |||||||||||||
2018 | 44.02 | 42.77 | 48.10 | 57.45 | 62.47 | 71.65 | 77.81 | 75.52 | 70.73 | 57.44 | 45.75 | 40.31 | 57.83 | |||||||||||||
2019 | 40.58 | 37.70 | 47.27 | 55.65 | 56.13 | 68.80 | 76.15 | d | 75.82 | 68.97 | 55.74 | 47.88 | 39.82 | 55.88 | ||||||||||||
2020 | 40.69 | 42.95 | a | 46.94 | 54.05 | 64.21 | 70.60 | 76.55 | 77.81 | 69.92 | 60.37 | 50.07 | 40.42 | 57.88 | ||||||||||||
2021 | 39.58 | 42.25 | 45.77 | 55.82 | 61.48 | 74.22 | 76.81 | 74.37 | 69.63 | 56.50 | 51.47 | 42.84 | 57.56 | |||||||||||||
2022 | 41.40 | 41.62 | 47.84 | 55.15 | 62.77 | 72.53 | 77.61 | 74.73 | 71.87 | 57.47 | 42.43 | 39.79 | 57.10 | |||||||||||||
2023 | 36.63 | 38.86 | 42.71 | 53.93 | 61.26 | 65.93 | 79.77 | 77.16 | 68.75 | 59.42 | 49.40 | 42.02 | 56.32 | |||||||||||||
2024 | 37.68 | 42.76 | 43.67 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.37 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.39 | 42.04 | 46.26 | 53.03 | 60.66 | 69.88 | 75.57 | 73.78 | 67.95 | 57.86 | 46.67 | 39.84 | 55.97 | |||||||||||||
S.D. | 2.81 | 3.12 | 2.91 | 2.63 | 2.61 | 2.46 | 1.72 | 1.95 | 2.24 | 2.57 | 3.04 | 2.58 | 1.16 | |||||||||||||
SKEW | -0.65 | -0.04 | -0.30 | -0.49 | -0.17 | -0.13 | -0.12 | -0.27 | -0.46 | 0.18 | 0.37 | 0.43 | 0.52 | |||||||||||||
MAX | 46.24 | 48.89 | 53.39 | 57.52 | 65.76 | 74.76 | 79.77 | 77.81 | 72.42 | 66.02 | 55.12 | 48.68 | 58.73 | |||||||||||||
MIN | 29.52 | 35.91 | 39.60 | 45.40 | 54.02 | 63.63 | 71.29 | 67.82 | 62.68 | 52.44 | 40.78 | 33.87 | 54.06 | |||||||||||||
YRS | 64 | 65 | 69 | 68 | 74 | 70 | 69 | 72 | 70 | 72 | 72 | 64 | 49 |