YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.50 | p | 56.42 | g | 35.98 | g | 27.10 | a | 27.10 | k |
1957 | 31.16 | 35.63 | a | 46.17 | e | 50.52 | h | 57.15 | d | 68.30 | g | 75.76 | h | 74.33 | g | 64.94 | f | 55.48 | a | 38.76 | c | 33.95 | b | 42.61 | e | |
1958 | 29.69 | d | 42.30 | h | 42.35 | d | 50.74 | a | 63.72 | a | 73.26 | e | 79.32 | c | 77.86 | q | 68.34 | e | 56.30 | a | 42.00 | 34.76 | l | 56.19 | c | |
1959 | 32.55 | 38.93 | a | 45.35 | 55.38 | a | 65.02 | b | 77.09 | b | 80.19 | 74.48 | d | 66.10 | a | 54.24 | b | 40.36 | a | 31.77 | 55.12 | |||||
1960 | 28.46 | c | 32.12 | a | 45.95 | a | 54.48 | 61.23 | a | 72.21 | b | 77.43 | i | 76.20 | c | 69.85 | d | 54.42 | 44.30 | 31.37 | 51.87 | a | ||||
1961 | 30.07 | a | 39.58 | b | 44.34 | 52.67 | 62.12 | c | 75.67 | a | 77.77 | a | 75.72 | b | 61.09 | a | 53.48 | a | 40.87 | 26.23 | c | 53.30 | ||||
1962 | 27.94 | 40.50 | a | 40.66 | 57.07 | a | 62.08 | a | 70.85 | 76.07 | b | 75.78 | a | 67.75 | d | 57.38 | c | 45.14 | b | 30.18 | a | 54.28 | ||||
1963 | 16.47 | 40.20 | c | 43.43 | c | 51.16 | b | 65.38 | c | 69.68 | b | 78.03 | b | 73.86 | b | 68.76 | c | 60.09 | c | 43.91 | b | 29.10 | b | 53.34 | ||
1964 | 27.91 | b | 30.36 | d | 38.40 | a | 51.23 | 61.65 | h | 69.60 | 80.62 | b | 71.97 | m | 67.05 | b | 58.64 | b | 40.05 | a | 33.52 | d | 49.74 | b | ||
1965 | 35.68 | a | 35.80 | c | 41.57 | b | 52.15 | 58.43 | c | 66.44 | e | 74.12 | f | 73.33 | g | 61.95 | b | 55.66 | c | 46.86 | b | 34.52 | a | 48.91 | b | |
1966 | 29.66 | 32.83 | a | 45.50 | a | 52.74 | c | 65.14 | c | 71.87 | c | 78.25 | a | 76.07 | b | 67.56 | c | 53.52 | b | 45.45 | b | 32.92 | 54.29 | |||
1967 | 27.92 | 40.11 | a | 49.91 | b | 52.15 | d | 60.37 | e | 66.09 | b | 77.21 | c | 75.84 | c | 67.41 | g | 56.96 | c | 44.34 | a | 24.95 | a | 52.35 | a | |
1968 | 20.13 | 40.88 | c | 46.02 | a | 48.83 | 60.09 | b | 71.26 | c | 75.58 | a | 69.22 | a | 63.62 | b | 55.71 | 40.65 | 26.97 | a | 51.58 | |||||
1969 | 34.89 | 36.36 | 40.77 | a | 54.62 | a | 65.00 | b | 66.45 | a | 77.16 | b | 76.97 | b | 68.53 | 48.33 | a | 39.71 | a | 34.62 | b | 53.62 | ||||
1970 | 32.29 | b | 40.71 | b | 41.38 | c | 47.21 | a | 62.68 | a | 68.92 | 77.43 | c | 77.63 | 64.53 | 50.07 | b | 43.79 | b | 35.26 | 53.49 | |||||
1971 | 32.44 | 35.84 | c | 43.93 | b | 51.93 | c | 60.02 | b | 72.69 | a | 79.68 | f | 77.70 | a | 61.41 | h | 52.73 | c | 38.72 | 29.35 | e | 49.53 | b | ||
1972 | 34.19 | 40.23 | a | 51.02 | c | 54.53 | a | 61.25 | e | 71.64 | b | 78.04 | f | 74.93 | a | 65.38 | 53.73 | a | 39.12 | b | ----- | z | 54.60 | b | ||
1973 | 13.63 | a | 30.50 | a | 41.10 | a | 47.03 | a | ----- | z | 65.02 | c | 74.12 | b | 73.82 | a | 65.74 | i | 54.12 | e | 42.17 | 31.42 | 47.29 | b | ||
1974 | 18.89 | 22.20 | 46.17 | b | 48.18 | b | 64.48 | 71.97 | 74.27 | a | 71.06 | 63.72 | a | 53.12 | b | 38.37 | 26.78 | a | 49.93 | |||||||
1975 | 26.35 | 36.22 | c | 42.76 | 46.83 | a | 55.77 | e | 63.75 | b | 73.21 | 69.35 | a | 62.82 | b | 52.96 | c | 40.17 | 32.77 | 50.25 | ||||||
1976 | 27.42 | a | 42.22 | 41.98 | a | 54.35 | c | 60.95 | c | 69.52 | 77.48 | a | 72.55 | a | 66.38 | a | 50.71 | 43.89 | h | 27.92 | g | 56.36 | b | |||
1977 | 25.77 | 35.57 | a | 39.10 | 52.95 | b | 57.40 | 72.22 | c | 72.67 | a | 74.42 | a | 68.54 | b | 55.21 | b | 43.30 | 38.33 | a | 52.96 | |||||
1978 | 32.82 | 36.93 | 49.03 | a | 53.43 | a | 58.13 | a | 70.12 | a | 77.15 | a | 74.66 | 65.16 | a | 54.30 | c | 43.36 | a | 25.27 | 53.36 | |||||
1979 | 22.97 | 29.36 | 42.92 | a | 51.89 | c | ----- | z | 69.47 | 75.87 | 73.28 | a | 70.05 | b | 57.17 | d | 34.97 | 29.45 | a | 50.67 | a | |||||
1980 | 34.82 | 40.23 | a | 41.10 | a | 50.64 | a | 56.00 | a | 69.28 | 74.93 | a | 71.60 | a | 65.96 | b | 52.37 | 41.88 | a | 39.45 | a | 53.19 | ||||
1981 | 36.19 | 37.41 | 44.02 | 57.12 | a | 59.95 | a | 74.66 | a | 76.27 | 73.66 | 68.52 | b | 53.74 | 45.20 | 35.08 | 55.15 | |||||||||
1982 | 31.44 | 36.48 | 45.43 | b | 51.12 | 60.03 | b | 68.88 | b | 76.82 | a | 75.02 | 65.62 | a | 51.50 | a | 40.47 | 33.05 | 52.99 | |||||||
1983 | 33.05 | a | 39.69 | a | 43.79 | 47.53 | 56.73 | a | 67.10 | 75.65 | a | 75.70 | a | 68.95 | 55.50 | 42.57 | 31.87 | a | 53.18 | |||||||
1984 | 23.18 | 33.03 | 41.78 | a | 47.85 | 63.67 | a | 67.98 | 77.62 | c | 77.27 | a | 69.48 | d | 50.58 | a | 42.61 | b | 34.61 | 52.47 | ||||||
1985 | 32.98 | b | 33.43 | a | 45.83 | a | 55.97 | 65.71 | e | 74.41 | c | 79.76 | h | 77.85 | a | 64.44 | d | 55.67 | d | 41.94 | c | 34.14 | b | 52.94 | a | |
1986 | 36.28 | b | 42.98 | 50.47 | 52.81 | l | 61.54 | c | 75.57 | c | 75.13 | h | 78.22 | m | 64.19 | c | 52.11 | i | 43.11 | c | 33.50 | c | 50.95 | d | ||
1987 | 29.61 | 38.52 | c | 40.63 | h | 56.41 | c | 62.73 | a | 73.54 | b | 76.30 | h | 72.42 | k | 67.56 | e | 57.12 | k | 41.36 | b | 30.97 | 50.09 | d | ||
1988 | 24.40 | a | 35.52 | a | 43.83 | b | 53.73 | b | 62.78 | b | 76.16 | a | 78.76 | j | 76.77 | r | 66.75 | n | 61.45 | k | 44.63 | c | 30.63 | d | 46.46 | d |
1989 | 23.33 | a | 34.67 | a | 50.82 | a | 59.48 | d | 65.37 | h | 69.35 | m | 79.53 | m | 74.37 | l | 70.72 | u | ----- | z | 42.60 | i | 30.88 | e | 39.84 | g |
1990 | 33.84 | c | 39.39 | a | 50.43 | d | 58.25 | h | 63.31 | o | 78.59 | n | 80.29 | x | ----- | z | ----- | z | 53.14 | q | 42.38 | f | 24.96 | e | 37.15 | h |
1991 | 22.78 | a | 35.45 | 44.37 | a | 52.71 | b | 62.71 | c | 72.81 | i | 80.06 | n | 76.74 | n | 67.45 | s | 48.55 | u | 40.37 | c | 29.73 | 41.16 | e | ||
1992 | 25.06 | 39.38 | 49.00 | 61.50 | 65.58 | 71.05 | b | ----- | z | ----- | z | 73.50 | w | 57.71 | q | 38.50 | 29.13 | 47.40 | d | |||||||
1993 | 35.02 | a | 38.00 | 46.85 | 53.38 | 62.98 | a | 70.55 | 76.48 | g | 73.50 | j | 67.34 | h | 48.34 | l | 37.39 | b | 32.21 | 47.05 | d | |||||
1994 | 33.26 | 36.20 | a | 49.18 | a | 54.67 | a | 64.81 | b | 76.80 | b | 79.62 | j | 79.26 | l | 68.03 | l | 51.17 | m | 40.83 | 34.68 | 48.81 | d | |||
1995 | 35.92 | 44.89 | 48.44 | 52.52 | f | 58.29 | b | 67.16 | a | 78.03 | m | 75.83 | s | 61.61 | u | 52.81 | r | 45.57 | b | 36.73 | 48.14 | e | ||||
1996 | 33.67 | b | 41.33 | 46.82 | a | 53.52 | 65.57 | b | 73.47 | a | 78.44 | m | 77.33 | a | 63.03 | k | 45.59 | o | 43.65 | g | 35.73 | 53.43 | d | |||
1997 | 34.48 | 37.42 | d | 48.55 | 48.38 | 62.73 | 73.00 | 76.66 | 75.41 | i | 68.00 | a | 54.34 | i | 41.97 | m | 30.25 | a | 53.27 | c | ||||||
1998 | 36.89 | 38.55 | 43.58 | a | 49.92 | 62.23 | 69.25 | 78.53 | b | 77.47 | 72.25 | b | 56.06 | d | 44.43 | 31.45 | a | 55.05 | ||||||||
1999 | 37.05 | a | 41.28 | a | 51.65 | a | 51.03 | 60.66 | 70.62 | a | 77.25 | c | 72.23 | 65.00 | b | 55.95 | 46.55 | 33.52 | 55.23 | |||||||
2000 | 35.73 | 42.27 | a | 45.27 | c | 58.28 | c | 66.52 | c | 72.48 | c | 78.42 | 76.68 | a | 67.90 | a | 55.03 | a | 36.17 | 33.90 | 55.72 | |||||
2001 | 30.73 | a | 39.48 | 47.15 | 55.77 | b | 65.50 | b | 74.61 | c | 78.10 | f | 75.36 | c | 69.89 | c | 56.72 | f | 45.83 | a | 31.93 | a | 53.62 | b | ||
2002 | 32.02 | c | 33.94 | a | 44.62 | c | 59.52 | d | 63.52 | c | 75.50 | b | 80.53 | b | 74.78 | b | 66.36 | e | 52.66 | 40.23 | 34.11 | 54.82 | ||||
2003 | 37.44 | 37.89 | 46.62 | a | 54.57 | a | 63.53 | 71.63 | c | 81.79 | c | 77.84 | c | 66.87 | c | 59.69 | b | 40.57 | b | 34.17 | a | 56.05 | ||||
2004 | 27.72 | a | 35.24 | 51.10 | 54.91 | b | 64.73 | 71.75 | d | 77.31 | 74.02 | b | 66.78 | e | 54.86 | c | 41.12 | a | 32.79 | 54.36 | ||||||
2005 | 39.82 | 39.70 | 44.82 | a | 53.48 | a | 62.42 | a | 68.21 | a | 77.89 | 73.29 | 66.76 | a | 55.35 | 43.32 | 32.29 | 54.78 | ||||||||
2006 | 34.90 | 36.71 | 44.47 | 56.17 | 64.79 | 74.20 | 78.21 | 73.93 | a | 61.86 | b | 52.48 | 42.47 | 31.97 | 54.35 | |||||||||||
2007 | 29.06 | 39.54 | 47.78 | a | 54.47 | 62.14 | b | 72.47 | 80.24 | 76.37 | 67.20 | 53.35 | 44.03 | a | 30.73 | a | 54.78 | |||||||||
2008 | 27.85 | 34.83 | 43.84 | 51.08 | 59.95 | a | 70.15 | 79.76 | 75.62 | a | 66.43 | 55.27 | 43.55 | a | 31.58 | a | 53.33 | |||||||||
2009 | 32.21 | 40.21 | 47.68 | 53.10 | 65.47 | 69.43 | b | 78.47 | a | 74.71 | 68.27 | 51.45 | 43.67 | 24.05 | a | 54.06 | ||||||||||
2010 | 26.66 | 33.12 | 44.60 | 54.29 | a | 60.61 | 73.42 | 78.97 | a | 74.13 | a | 68.88 | 56.65 | 40.40 | 37.79 | 54.13 | ||||||||||
2011 | 27.82 | a | 33.85 | a | 47.21 | 52.00 | a | 58.29 | 71.75 | 76.23 | 77.70 | a | 67.53 | 53.71 | 41.12 | 29.68 | 53.07 | |||||||||
2012 | 32.98 | a | 37.55 | 48.66 | 56.70 | 64.68 | a | 75.63 | 78.74 | 77.58 | 67.22 | 56.05 | 45.07 | 31.69 | 56.05 | |||||||||||
2013 | 19.98 | 33.46 | 47.30 | a | 52.37 | 62.61 | 75.28 | 79.23 | 73.35 | 66.72 | 50.58 | 41.33 | 25.32 | 52.30 | ||||||||||||
2014 | 31.63 | 40.25 | 46.15 | 51.87 | 61.42 | 71.03 | 78.58 | 72.53 | 68.95 | 56.27 | 41.47 | 35.58 | 54.64 | |||||||||||||
2015 | 34.15 | 41.86 | 49.82 | 53.52 | 60.21 | 74.57 | 74.65 | 75.48 | 69.57 | 58.60 | 41.08 | 29.45 | 55.25 | |||||||||||||
2016 | 30.76 | 37.57 | 47.18 | 53.35 | 60.61 | 75.72 | 78.48 | 73.87 | 67.15 | 59.47 | 46.65 | 33.55 | 55.36 | |||||||||||||
2017 | 33.40 | 44.96 | 52.03 | 55.20 | 62.18 | 76.05 | 80.60 | 75.97 | 67.97 | 54.84 | 48.02 | a | 34.61 | 57.15 | ||||||||||||
2018 | 35.13 | 39.43 | 46.68 | 57.80 | 66.08 | 75.68 | 82.26 | 78.60 | 71.73 | 53.76 | b | 41.09 | a | 35.15 | 56.95 | |||||||||||
2019 | 33.95 | 38.07 | 48.53 | 57.53 | 58.89 | 71.20 | 78.58 | 77.81 | 70.97 | 53.18 | 45.20 | b | 36.00 | 55.83 | ||||||||||||
2020 | 31.61 | 38.17 | 50.26 | 55.25 | 67.55 | 74.05 | 78.39 | 79.90 | 68.95 | 58.03 | 47.35 | 32.15 | 56.80 | |||||||||||||
2021 | 33.76 | 40.09 | 48.31 | 56.72 | 64.98 | 76.42 | 81.63 | 76.35 | 70.32 | 55.73 | 48.43 | 39.24 | 57.66 | |||||||||||||
2022 | 34.35 | 36.73 | 47.90 | 55.88 | 64.68 | 74.62 | 80.06 | 77.71 | 72.22 | 56.42 | 40.63 | 36.75 | a | 56.50 | ||||||||||||
2023 | 37.11 | 35.84 | 42.47 | 53.60 | 64.79 | 70.30 | 80.18 | 76.73 | 69.30 | 57.73 | 46.13 | 38.15 | 56.03 | |||||||||||||
2024 | 38.15 | 43.45 | 48.71 | 51.61 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.43 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.61 | 37.48 | 45.89 | 53.40 | 62.21 | 71.77 | 77.86 | 75.23 | 67.28 | 54.76 | 42.40 | 32.17 | 54.35 | |||||||||||||
S.D. | 5.42 | 3.87 | 3.24 | 3.20 | 2.83 | 3.15 | 2.18 | 2.26 | 2.53 | 2.52 | 2.87 | 3.59 | 1.71 | |||||||||||||
SKEW | -0.97 | -0.95 | -0.14 | -0.05 | -0.41 | -0.35 | -0.25 | -0.57 | -0.37 | -0.11 | -0.08 | -0.29 | -0.41 | |||||||||||||
MAX | 39.82 | 44.96 | 52.03 | 61.50 | 67.55 | 77.09 | 82.26 | 79.90 | 72.25 | 60.09 | 48.43 | 39.45 | 57.66 | |||||||||||||
MIN | 13.63 | 22.20 | 38.40 | 46.83 | 55.77 | 63.75 | 72.67 | 69.22 | 61.09 | 48.33 | 34.97 | 24.05 | 49.93 | |||||||||||||
YRS | 68 | 67 | 67 | 63 | 62 | 63 | 49 | 52 | 54 | 54 | 62 | 65 | 42 |