YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1941 | ----- | z | ----- | z | 47.03 | 54.64 | a | 58.36 | c | 66.45 | 79.79 | 72.97 | 58.55 | b | 50.11 | ----- | z | 33.55 | 57.94 | c | ||||||
1942 | ----- | z | 34.41 | 42.23 | 53.10 | 57.70 | a | 65.15 | 76.39 | 78.16 | 67.53 | ----- | z | 34.33 | 26.56 | 53.56 | b | |||||||||
1943 | 18.83 | a | 33.79 | 40.48 | 54.12 | 56.94 | 64.35 | 76.92 | a | 71.87 | 68.57 | 52.43 | a | 38.23 | f | 29.69 | 51.64 | a | ||||||||
1944 | 25.84 | 34.27 | a | 40.05 | b | 51.53 | 61.84 | b | 68.38 | 76.85 | 74.55 | l | 67.38 | 57.90 | 37.14 | b | 30.17 | m | 52.12 | b | ||||||
1945 | ----- | z | ----- | z | 41.06 | 49.32 | 61.95 | 67.08 | 77.56 | 75.76 | ----- | z | 54.12 | b | 34.91 | a | 30.24 | b | 54.67 | c | ||||||
1946 | 29.00 | a | 33.91 | 43.19 | b | 51.42 | 63.15 | 64.80 | 75.24 | 74.65 | 61.78 | 46.52 | 31.29 | a | 29.88 | a | 50.40 | |||||||||
1947 | 23.45 | 37.80 | 46.45 | 53.32 | 65.88 | a | 65.33 | a | 72.18 | a | 70.77 | a | 63.09 | b | 51.23 | a | 38.33 | a | 29.10 | b | 51.41 | |||||
1948 | 28.08 | g | 29.13 | c | 38.97 | 44.88 | 55.52 | b | 69.54 | b | 70.58 | a | 69.18 | 61.68 | 49.65 | 36.42 | 17.52 | 49.37 | a | |||||||
1949 | 6.16 | 24.30 | 42.08 | 52.63 | 64.42 | 66.83 | 72.05 | b | ----- | z | 64.47 | 46.92 | a | 43.28 | 30.50 | 46.70 | a | |||||||||
1950 | 6.02 | 26.39 | 38.95 | 46.20 | 56.31 | b | 63.91 | b | 73.28 | b | 73.38 | b | 64.40 | a | 47.58 | 36.20 | 31.89 | 47.04 | ||||||||
1951 | 27.69 | 32.38 | b | 35.16 | 51.92 | 58.63 | 65.84 | a | 73.90 | 72.19 | 63.95 | a | 50.52 | e | 36.27 | 22.32 | a | 49.23 | ||||||||
1952 | 17.90 | 29.71 | 39.98 | 52.95 | 60.44 | 65.30 | 74.20 | a | ----- | z | 66.72 | 57.66 | 32.83 | 31.34 | 48.09 | a | ||||||||||
1953 | 37.34 | 38.27 | 42.66 | 47.78 | 55.56 | 60.17 | 71.84 | 70.77 | 64.48 | a | 53.26 | 41.15 | 34.82 | 51.51 | ||||||||||||
1954 | 24.83 | a | 35.00 | 38.35 | 46.61 | b | 60.58 | 61.52 | 70.50 | 67.73 | 61.45 | a | 48.06 | 42.86 | a | 30.26 | 48.98 | |||||||||
1955 | 25.65 | 30.27 | 35.29 | 44.62 | 53.95 | 66.33 | a | 69.47 | 72.24 | 62.18 | 51.13 | 25.76 | a | 21.43 | a | 46.53 | ||||||||||
1956 | 25.58 | 20.31 | 37.23 | 54.03 | 61.98 | 62.30 | 73.82 | 70.37 | a | 64.83 | 47.88 | a | 31.40 | a | 28.33 | b | 48.17 | |||||||||
1957 | 12.52 | 27.69 | a | 38.82 | 51.74 | a | 63.93 | a | 66.88 | 68.84 | 67.03 | a | 65.80 | 47.44 | 37.25 | 33.90 | a | 48.49 | ||||||||
1958 | 33.62 | b | 42.20 | 40.79 | 48.40 | 65.79 | 70.85 | 75.89 | 75.81 | 61.27 | 51.11 | 36.77 | 31.12 | a | 52.80 | |||||||||||
1959 | 28.85 | a | 29.56 | a | 42.31 | 51.79 | a | 54.37 | 64.38 | 73.02 | a | 66.85 | a | 58.72 | a | 48.73 | 31.87 | 29.83 | a | 48.36 | ||||||
1960 | 21.50 | 34.64 | 41.06 | 48.97 | 53.92 | 64.72 | 75.95 | 67.45 | 62.73 | 50.39 | 37.57 | 26.37 | 48.77 | |||||||||||||
1961 | 32.10 | b | 40.84 | 42.81 | 49.75 | 58.48 | 70.15 | 73.83 | y | 76.60 | b | 60.21 | a | 48.17 | a | 33.28 | 28.60 | 49.18 | a | |||||||
1962 | 26.73 | 35.45 | 39.65 | 53.38 | a | 55.47 | 67.72 | j | 71.14 | c | 67.77 | 64.10 | 50.38 | j | 40.75 | 34.53 | 48.90 | b | ||||||||
1963 | 23.37 | 37.62 | 43.23 | 47.86 | b | 58.40 | 66.35 | 68.55 | 71.23 | 66.83 | 52.55 | 39.10 | 26.55 | 50.14 | ||||||||||||
1964 | 28.69 | 32.64 | 40.23 | 48.33 | 56.29 | 63.53 | 69.67 | a | 65.68 | 59.37 | 50.81 | 36.00 | 26.72 | m | 50.11 | a | ||||||||||
1965 | 30.03 | m | 34.61 | 40.50 | 52.27 | 57.13 | 66.13 | 71.27 | 70.44 | ----- | z | 52.19 | 39.80 | 29.28 | a | 51.36 | b | |||||||||
1966 | 25.05 | a | 33.54 | 41.53 | a | 50.60 | 58.89 | 61.50 | 67.97 | 69.35 | a | 64.33 | a | 47.74 | b | 40.76 | a | 34.47 | a | 49.64 | ||||||
1967 | 35.21 | 39.34 | 39.98 | 45.40 | 56.81 | 67.53 | 71.27 | 73.15 | 65.80 | 49.27 | 38.03 | 27.65 | 50.79 | |||||||||||||
1968 | 29.50 | 37.97 | 44.69 | 47.79 | a | 57.47 | a | 63.98 | 71.50 | 65.40 | 60.88 | 46.42 | 37.90 | 25.79 | 49.11 | |||||||||||
1969 | 13.42 | 26.05 | 41.87 | 50.07 | 62.24 | 69.98 | 69.02 | 66.50 | 60.55 | a | 46.48 | 36.03 | 30.94 | 47.76 | ||||||||||||
1970 | 25.31 | 36.64 | 42.05 | 47.27 | 59.60 | a | 70.38 | 72.29 | 69.84 | 57.40 | 48.69 | 36.45 | 22.66 | 49.05 | ||||||||||||
1971 | 25.10 | a | 35.80 | 37.24 | 48.98 | 61.73 | 61.43 | 71.89 | 73.94 | 57.25 | 47.82 | a | 37.93 | 22.18 | a | 48.44 | ||||||||||
1972 | 25.13 | 33.72 | 44.40 | 46.95 | 60.26 | 67.07 | a | 70.08 | 71.50 | 57.50 | 49.39 | 39.18 | 26.53 | 49.31 | ||||||||||||
1973 | 26.23 | 35.57 | a | 45.37 | 52.18 | 60.48 | 65.38 | a | 72.89 | 70.15 | 62.88 | 50.26 | 32.92 | 35.03 | 50.78 | |||||||||||
1974 | 26.31 | 38.50 | 42.92 | 51.12 | 55.39 | 68.15 | 69.24 | 71.07 | a | 64.62 | 50.08 | a | 40.19 | a | 33.38 | b | 50.91 | |||||||||
1975 | 24.84 | 29.46 | a | 40.16 | 47.50 | 58.38 | a | 64.23 | 75.15 | 67.50 | 64.62 | 49.95 | a | 37.63 | 32.23 | a | 49.30 | |||||||||
1976 | 28.63 | 35.53 | 40.11 | 50.23 | 58.97 | b | 62.23 | 69.95 | 67.37 | 65.63 | 49.33 | b | 38.43 | 29.07 | b | 49.62 | ||||||||||
1977 | 24.59 | c | 38.34 | 43.15 | a | 55.73 | 56.66 | 69.97 | 69.65 | 73.89 | c | 58.90 | a | 50.38 | c | 36.23 | 31.06 | 50.71 | ||||||||
1978 | 30.61 | 35.68 | 45.43 | a | 51.00 | a | 57.32 | 67.71 | a | 71.74 | 69.17 | a | 60.62 | 49.73 | 32.40 | a | 25.62 | a | 49.75 | |||||||
1979 | 14.60 | a | 30.43 | a | 44.42 | 50.28 | 61.48 | 67.32 | 72.16 | 71.85 | 65.64 | a | 55.20 | a | 33.23 | 34.18 | a | 50.07 | ||||||||
1980 | 18.63 | 32.50 | a | 43.26 | 54.23 | 59.42 | a | 62.22 | 71.00 | 67.29 | 62.52 | 49.94 | 38.95 | b | 31.77 | 49.31 | ||||||||||
1981 | 37.23 | a | 36.46 | 45.77 | 49.37 | 57.97 | 61.83 | 68.20 | a | 72.53 | a | 60.86 | a | 47.90 | 41.12 | 28.94 | e | 50.68 | ||||||||
1982 | ----- | z | 34.40 | c | 41.92 | a | 45.21 | f | 56.02 | f | 67.77 | d | 68.25 | c | 70.27 | e | 61.02 | e | 47.52 | c | 33.29 | a | 26.82 | c | 50.14 | c |
1983 | 33.20 | c | 37.12 | c | 45.16 | b | 49.89 | c | 61.63 | d | 64.11 | c | 68.48 | c | 71.79 | e | 60.33 | f | 50.54 | c | 40.88 | f | 19.35 | a | 50.13 | b |
1984 | 29.72 | a | 36.83 | b | 45.52 | a | 48.52 | b | 53.33 | e | 62.24 | e | 73.71 | l | 70.66 | 59.03 | 46.50 | c | 36.40 | d | 17.13 | e | 45.99 | a | ||
1985 | 22.82 | 20.30 | 39.47 | 52.55 | 60.84 | 65.67 | 76.66 | 66.95 | a | 56.88 | a | 48.81 | 22.43 | 17.25 | a | 45.89 | ||||||||||
1986 | 27.57 | b | 31.69 | b | 45.85 | 49.28 | 60.13 | 71.35 | 68.50 | 75.95 | a | 60.07 | 53.27 | 40.03 | 28.90 | a | 51.05 | |||||||||
1987 | 24.85 | a | 36.68 | 45.55 | 54.27 | 61.39 | 66.40 | 69.52 | 70.11 | 65.23 | 52.06 | 40.88 | 27.77 | a | 51.23 | |||||||||||
1988 | 25.71 | b | 36.56 | b | 44.15 | 52.91 | a | 57.31 | 63.33 | 70.87 | 69.65 | 61.00 | 56.18 | a | 40.57 | 28.33 | a | 50.55 | ||||||||
1989 | 31.75 | a | 25.77 | h | 40.30 | c | 53.88 | a | 57.98 | a | 67.92 | 70.68 | c | 68.66 | b | 63.69 | a | 50.29 | b | 41.47 | 31.02 | 52.51 | a | |||
1990 | 36.84 | 32.95 | 44.95 | a | 54.95 | 57.44 | 65.34 | e | 76.08 | e | 71.52 | d | 68.53 | 48.40 | a | 42.33 | 22.52 | 51.82 | ||||||||
1991 | 26.10 | a | 40.84 | c | 40.59 | d | 51.80 | c | 57.52 | b | 61.63 | 72.07 | a | 72.87 | a | 66.18 | b | 49.78 | a | 37.73 | 35.58 | a | 51.06 | |||
1992 | 34.02 | d | 39.96 | b | 48.43 | a | 52.10 | 61.50 | b | 71.24 | a | 70.43 | a | 71.23 | a | 60.62 | e | 51.25 | c | 38.30 | b | 21.59 | c | 51.72 | ||
1993 | 21.19 | d | 27.50 | c | 38.95 | c | 48.33 | 64.85 | e | 64.35 | d | 66.12 | a | 68.63 | 64.28 | c | 52.92 | e | 32.86 | e | 31.65 | a | 48.47 | |||
1994 | 35.52 | e | 34.24 | e | 46.28 | d | 54.46 | g | 61.00 | h | 63.87 | c | 74.58 | e | 70.31 | e | 65.35 | g | 50.15 | g | 35.30 | g | 31.17 | g | 54.13 | f |
1995 | 31.57 | c | 40.20 | a | 42.70 | a | 50.14 | e | 61.30 | c | 65.43 | h | 72.08 | f | 65.76 | h | 64.92 | d | 48.88 | k | 40.65 | g | 29.82 | f | 48.47 | f |
1996 | 23.18 | c | 28.78 | b | 41.71 | g | 50.78 | g | 54.33 | d | 63.85 | d | 73.24 | d | 70.36 | f | 60.17 | f | 49.29 | g | 34.14 | e | 22.96 | e | 42.93 | e |
1997 | 25.64 | b | 31.10 | b | 41.52 | b | 48.52 | c | 60.32 | a | 63.30 | b | 69.89 | c | 71.79 | b | 62.34 | a | 49.00 | c | 39.75 | b | 30.65 | d | 49.48 | |
1998 | 29.13 | d | 39.24 | e | 44.73 | a | 50.04 | d | 59.85 | g | 65.94 | c | 76.96 | d | 73.35 | a | 66.27 | 48.22 | b | 41.93 | 29.08 | a | 51.36 | a | ||
1999 | 35.18 | 38.65 | b | 43.52 | 49.41 | a | 54.52 | c | 64.81 | a | 69.48 | d | 73.00 | c | 62.02 | 50.58 | f | 42.97 | a | 35.43 | a | 51.73 | a | |||
2000 | 27.85 | 35.91 | 43.40 | a | 53.90 | a | 58.55 | a | 66.90 | 71.38 | b | 71.18 | 60.83 | 50.74 | d | 31.91 | c | 26.05 | a | 49.88 | ||||||
2001 | 30.27 | 32.29 | b | 45.38 | c | 49.31 | d | 60.33 | b | 63.82 | b | 72.24 | b | 73.48 | c | 66.31 | c | 50.87 | a | 41.55 | 32.52 | 51.53 | ||||
2002 | 34.98 | a | 34.95 | 40.10 | f | 49.98 | 56.02 | 67.17 | a | 74.64 | b | 71.06 | 63.64 | b | 48.81 | 39.25 | b | 35.34 | c | 52.35 | a | |||||
2003 | 35.00 | 38.41 | a | 45.61 | 49.40 | a | 57.09 | b | 68.86 | a | 74.73 | a | 72.44 | d | 66.05 | a | 55.53 | 35.00 | 29.21 | 52.28 | ||||||
2004 | 27.77 | 35.26 | 47.98 | a | 53.16 | b | 59.36 | b | 67.28 | a | 75.20 | c | 73.48 | c | 61.48 | b | 52.18 | f | 38.07 | b | 34.73 | e | 52.16 | a | ||
2005 | 28.15 | a | 36.77 | 46.08 | a | 51.63 | 61.68 | 64.70 | 72.68 | a | 72.77 | c | 62.20 | 51.87 | a | 37.02 | f | 24.70 | c | 52.11 | a | |||||
2006 | 35.79 | b | 34.57 | 42.53 | a | 50.88 | b | 59.27 | 66.81 | a | 76.29 | c | 71.77 | 64.65 | c | 50.43 | h | 37.38 | f | 26.39 | c | 52.90 | b | |||
2007 | 25.80 | f | 35.63 | e | 43.94 | g | 49.64 | b | 60.67 | h | 64.77 | h | 75.96 | f | 69.43 | j | 63.55 | j | 49.91 | i | 37.52 | e | 27.75 | g | 40.93 | i |
2008 | 20.20 | c | 34.08 | i | 41.08 | g | 45.28 | e | 61.50 | k | 66.17 | j | 71.30 | k | 69.59 | i | 62.24 | g | 50.55 | i | 40.08 | d | 24.92 | m | 35.18 | i |
2009 | 25.15 | h | 34.24 | i | 39.28 | d | 51.35 | f | 61.69 | d | 68.24 | e | 75.17 | b | 72.53 | b | 64.64 | h | 47.71 | g | 39.00 | i | 25.73 | e | 57.11 | f |
2010 | 36.58 | l | 43.45 | g | 51.69 | e | 54.94 | f | 55.92 | g | 64.29 | a | 72.54 | c | 72.02 | d | 62.73 | 52.05 | 34.38 | 30.65 | 55.04 | d | ||||
2011 | 32.16 | 36.30 | 43.11 | 46.62 | 55.87 | 63.98 | 68.98 | 72.13 | 64.70 | c | 51.21 | 36.73 | 29.19 | 50.08 | ||||||||||||
2012 | 28.63 | 36.77 | a | 42.76 | 50.35 | 58.29 | 63.50 | 72.97 | 72.32 | 63.52 | 50.69 | 40.73 | 32.94 | 51.12 | ||||||||||||
2013 | 26.94 | 37.76 | a | 44.05 | b | 52.16 | a | 60.74 | b | 65.78 | c | 76.29 | 72.98 | a | 66.66 | a | 49.58 | a | 36.92 | 24.11 | 51.16 | |||||
2014 | 30.87 | 29.30 | 41.65 | 50.33 | a | 61.73 | a | 66.72 | 76.32 | 74.31 | 64.60 | a | 53.60 | 35.68 | 34.03 | a | 51.60 | |||||||||
2015 | 31.40 | 41.05 | 46.81 | 51.22 | 61.54 | q | 76.03 | n | 78.12 | s | 75.77 | t | 62.05 | s | 54.42 | 34.82 | 31.21 | q | 43.29 | f | ||||||
2016 | 32.53 | p | 41.50 | p | 45.79 | l | 59.96 | r | 63.25 | u | 67.54 | r | ----- | z | 73.38 | r | 63.36 | p | 50.42 | y | 45.33 | 24.66 | 35.00 | j | ||
2017 | 21.82 | 29.09 | 43.08 | 48.98 | 60.40 | 66.82 | 76.11 | 75.48 | 63.85 | 49.45 | 37.47 | 28.03 | 50.05 | |||||||||||||
2018 | 34.48 | 35.88 | 44.15 | 50.18 | 63.40 | 65.00 | 74.25 | c | 71.76 | 61.48 | 50.44 | 38.17 | 33.47 | 51.89 | ||||||||||||
2019 | 33.15 | 23.30 | 36.82 | 52.33 | 63.18 | 67.12 | 71.13 | 72.90 | 60.80 | 44.81 | 36.95 | ----- | z | 51.14 | a | |||||||||||
2020 | ----- | z | 38.41 | 43.63 | 52.43 | ----- | z | 65.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.88 | h | ||||
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.77 | t | ----- | z | 49.77 | t | 43.27 | j | 30.30 | a | 30.30 | k |
2022 | 26.40 | 33.41 | 46.53 | 45.23 | 55.00 | 65.62 | 75.61 | 76.73 | 66.37 | 56.98 | 31.52 | 22.13 | 50.13 | |||||||||||||
2023 | ----- | z | ----- | z | 44.27 | 50.68 | 67.05 | 69.65 | 75.45 | 73.26 | 63.50 | 52.48 | 39.08 | 38.62 | a | 57.40 | b | |||||||||
2024 | 32.31 | e | 43.45 | a | 47.19 | 52.47 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.98 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.02 | 34.22 | 42.65 | 50.40 | 59.23 | 65.76 | 72.52 | 71.37 | 63.04 | 50.48 | 37.10 | 28.76 | 49.96 | |||||||||||||
S.D. | 6.60 | 4.78 | 3.11 | 2.61 | 3.12 | 2.55 | 2.92 | 2.76 | 2.82 | 2.77 | 3.90 | 4.72 | 1.49 | |||||||||||||
SKEW | -1.00 | -0.83 | -0.03 | -0.25 | 0.25 | 0.18 | 0.16 | -0.06 | -0.22 | 0.70 | -0.92 | -0.52 | -0.57 | |||||||||||||
MAX | 37.34 | 43.45 | 51.69 | 55.73 | 67.05 | 71.35 | 79.79 | 78.16 | 68.57 | 57.90 | 45.33 | 38.62 | 52.80 | |||||||||||||
MIN | 6.02 | 20.30 | 35.16 | 44.62 | 53.33 | 60.17 | 66.12 | 65.40 | 56.88 | 44.81 | 22.43 | 17.13 | 45.89 | |||||||||||||
YRS | 71 | 75 | 78 | 76 | 73 | 76 | 74 | 72 | 71 | 69 | 73 | 74 | 48 |