YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | 31.44 | n | 37.46 | a | 40.36 | f | 53.93 | h | 59.25 | c | 63.42 | e | 77.27 | e | 74.54 | d | 65.74 | g | 50.48 | g | 39.75 | l | 31.31 | r | 62.39 | g |
1952 | 29.64 | j | 31.75 | g | 37.62 | k | 56.29 | w | 60.42 | f | 66.38 | i | 74.25 | g | 72.00 | t | 66.50 | o | 60.87 | p | 35.36 | s | 34.58 | r | ----- | z |
1953 | 41.77 | p | 38.65 | k | 45.35 | k | 48.36 | h | 52.85 | g | 60.31 | f | 75.96 | g | 73.02 | f | 69.42 | e | 57.52 | j | 48.71 | k | 31.54 | r | 69.42 | k |
1954 | 36.28 | m | 41.06 | k | 39.88 | k | 51.50 | r | 62.53 | n | 63.92 | l | 72.53 | p | 68.53 | n | 67.41 | s | 51.93 | p | 42.77 | s | 31.00 | m | ----- | z |
1955 | 26.25 | m | 30.16 | i | 39.03 | l | 47.83 | l | 56.53 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.68 | 76.45 | 74.48 | 69.35 | 52.66 | 38.62 | 35.69 | 59.56 | e | |||||||
1958 | 31.68 | 43.40 | b | 42.08 | 48.78 | a | 67.11 | 68.53 | a | 75.81 | 78.18 | 65.23 | 58.35 | 41.79 | a | 38.05 | 54.92 | |||||||||
1959 | 36.50 | 37.30 | 42.21 | 52.33 | a | 53.40 | 69.00 | 76.90 | 70.73 | 62.57 | 54.45 | 41.28 | 34.10 | b | 52.56 | |||||||||||
1960 | 28.53 | a | 34.19 | 44.67 | a | 52.37 | 57.53 | 70.35 | 81.65 | 70.74 | 68.48 | 55.29 | 42.87 | 33.82 | 53.37 | |||||||||||
1961 | 35.87 | a | 41.57 | 45.27 | 50.80 | 60.94 | 75.68 | 79.50 | a | 80.90 | a | 61.03 | 52.35 | 39.70 | 31.71 | 54.61 | ||||||||||
1962 | 22.95 | 33.61 | 40.53 | 55.88 | 57.28 | a | 68.32 | 74.65 | 73.35 | 68.22 | 54.81 | 44.13 | 36.76 | 52.54 | ||||||||||||
1963 | 26.58 | 44.37 | a | 44.40 | 48.42 | 61.98 | 64.82 | 73.08 | 74.92 | 72.78 | 60.60 | 44.29 | b | 30.66 | 53.91 | |||||||||||
1964 | 29.02 | g | 28.09 | l | 37.36 | j | 46.83 | a | 55.63 | a | 63.77 | 76.65 | a | 71.26 | 61.30 | 57.00 | d | 40.05 | k | 35.15 | h | 61.78 | e | |||
1965 | 33.02 | k | 36.64 | 39.10 | 51.03 | a | 55.50 | a | 65.62 | 75.43 | a | 72.90 | 58.72 | 58.95 | b | 48.32 | k | 33.88 | j | 57.10 | c | |||||
1966 | 34.92 | k | 33.74 | i | 43.02 | j | 50.02 | b | 63.10 | 66.52 | 75.32 | 74.95 | a | 69.33 | 53.31 | d | 45.38 | j | 34.07 | j | 64.65 | e | ||||
1967 | 35.45 | j | 38.61 | i | 43.56 | m | 44.41 | g | 57.03 | 65.57 | 78.79 | 79.89 | 71.32 | 53.62 | g | 43.67 | j | 29.34 | l | 70.52 | g | |||||
1968 | 32.18 | i | 40.50 | i | 46.05 | l | 46.09 | a | 57.10 | 66.30 | 77.66 | 68.90 | 63.15 | 52.80 | d | 40.26 | k | 33.95 | k | 61.71 | e | |||||
1969 | 32.30 | i | 35.39 | j | 40.12 | k | 51.00 | b | 61.53 | 66.45 | 74.29 | 74.44 | 66.62 | 48.17 | d | 43.47 | m | 35.52 | j | 63.21 | e | |||||
1970 | 35.58 | l | 40.84 | i | 41.70 | a | 42.88 | 57.92 | 69.10 | 75.94 | 76.79 | 58.55 | 49.60 | a | 42.67 | 32.06 | 54.72 | b | ||||||||
1971 | 32.45 | 36.39 | 38.27 | 48.27 | 59.10 | 64.05 | 74.85 | 79.44 | 59.52 | 49.19 | 38.92 | 30.35 | 50.90 | |||||||||||||
1972 | 29.69 | 34.12 | a | 44.71 | 47.13 | 59.61 | 67.68 | 72.65 | 75.65 | a | 59.67 | 53.23 | 41.05 | 26.71 | 50.99 | |||||||||||
1973 | 31.52 | 39.12 | 42.74 | 48.43 | a | 60.28 | a | 66.07 | 75.29 | 73.47 | 62.98 | 52.87 | 40.14 | b | 36.63 | 52.46 | ||||||||||
1974 | 28.27 | 37.00 | e | 42.40 | 47.40 | 55.03 | 70.48 | 73.47 | 71.52 | 65.95 | 51.89 | 42.93 | 31.48 | 51.49 | ||||||||||||
1975 | 27.19 | 34.79 | 38.57 | a | 42.28 | 54.22 | a | 62.65 | 78.02 | 69.83 | a | 67.00 | 52.60 | b | 38.85 | 31.90 | 49.83 | |||||||||
1976 | 31.67 | a | 34.10 | 36.92 | 47.50 | 59.40 | 60.70 | b | 74.10 | a | 68.45 | 64.09 | b | 51.69 | 42.04 | b | 31.42 | 50.17 | ||||||||
1977 | 20.57 | a | 35.14 | 38.10 | b | 51.74 | c | 52.52 | 70.03 | 70.97 | 73.34 | 62.85 | 54.08 | 38.95 | 37.02 | 50.44 | ||||||||||
1978 | 36.61 | 37.30 | 47.73 | 50.60 | a | 55.34 | 65.03 | a | 73.50 | 70.52 | 61.64 | a | 54.10 | 36.58 | 27.32 | 51.36 | ||||||||||
1979 | 17.98 | 35.04 | 44.05 | 48.98 | 57.85 | a | 66.62 | 74.57 | a | 73.10 | 67.60 | 55.15 | 37.06 | m | 36.58 | s | 54.09 | b | ||||||||
1980 | 29.38 | n | 43.25 | i | 40.68 | 52.85 | 58.02 | 63.58 | 74.21 | 68.97 | a | 63.38 | 53.61 | d | 41.73 | 35.12 | c | 55.22 | b | |||||||
1981 | 35.02 | 37.89 | 45.55 | 49.82 | b | 55.60 | 63.68 | 72.12 | a | 76.98 | a | 65.41 | b | 49.84 | f | 45.62 | 36.77 | 53.13 | a | |||||||
1982 | 27.16 | c | 30.07 | 42.70 | f | 44.31 | i | 55.38 | c | 66.54 | d | 67.50 | m | 74.24 | j | 63.12 | b | 51.17 | j | 37.38 | a | 32.76 | 44.63 | e | ||
1983 | 35.94 | d | 40.57 | a | 45.02 | a | 47.72 | g | 57.05 | b | 63.87 | c | 69.61 | c | 76.63 | a | 61.93 | c | 53.50 | p | 43.31 | c | 27.11 | h | 54.88 | c |
1984 | 25.41 | b | 32.11 | j | 42.44 | d | 47.96 | e | 55.74 | h | 61.07 | h | 75.20 | d | 76.65 | a | 61.75 | 50.04 | h | 39.57 | a | 24.98 | 49.25 | d | ||
1985 | 22.23 | 27.02 | 37.88 | c | 52.81 | a | 61.02 | c | 68.34 | a | ----- | z | 69.61 | c | 57.26 | a | 48.46 | c | 28.37 | 15.18 | 44.38 | a | ||||
1986 | 31.17 | h | 42.06 | c | 50.03 | a | 49.83 | 59.47 | a | 71.75 | b | 70.56 | 77.29 | c | 59.66 | e | 53.92 | a | 42.43 | b | 30.55 | 55.23 | a | |||
1987 | 29.46 | d | 40.80 | c | 44.52 | 56.85 | 61.57 | a | 69.40 | 71.50 | a | 70.43 | a | 65.83 | 57.11 | 43.57 | 33.94 | 53.75 | ||||||||
1988 | 27.35 | a | 38.50 | 42.35 | 53.31 | a | 57.92 | 69.62 | a | 74.00 | 71.29 | 60.88 | 58.65 | a | 39.25 | 25.26 | d | 51.53 | ||||||||
1989 | 22.38 | c | 20.54 | 40.39 | 52.95 | i | 57.50 | b | 68.82 | b | 75.06 | 71.11 | 63.81 | a | 52.07 | c | 37.91 | n | 30.47 | o | 52.41 | c | ||||
1990 | 31.82 | q | 29.90 | m | 42.74 | n | 53.73 | o | 54.63 | e | 65.08 | 76.18 | i | 72.29 | 69.34 | a | 53.62 | o | 39.32 | p | 24.35 | r | 65.34 | h | ||
1991 | 23.60 | p | 40.00 | m | 39.50 | n | 44.88 | m | 52.60 | j | 60.02 | c | 72.47 | 75.16 | 65.85 | c | 52.21 | n | 38.54 | p | 33.93 | p | 68.37 | h | ||
1992 | 31.83 | s | 43.27 | p | 47.18 | q | 55.09 | m | 64.77 | i | 68.93 | a | ----- | z | 72.58 | 60.79 | d | 55.56 | o | 34.12 | r | 30.28 | m | 67.43 | i | |
1993 | 23.29 | q | 25.87 | m | 40.39 | m | 46.76 | m | 64.18 | f | 59.48 | e | 62.81 | 67.88 | c | 64.33 | d | 54.03 | o | 36.96 | q | 33.12 | n | 63.62 | h | |
1994 | 35.17 | p | 35.04 | p | 46.61 | m | 53.71 | r | 61.10 | f | 65.38 | a | 75.13 | 75.05 | b | 66.02 | d | 51.38 | r | 32.12 | r | 31.18 | n | 70.39 | h | |
1995 | 37.46 | q | 40.50 | m | 42.82 | n | 48.19 | q | 57.55 | k | 63.05 | a | 72.60 | 69.71 | 65.80 | h | 49.90 | p | 42.35 | q | 35.23 | r | 68.45 | i | ||
1996 | 32.59 | o | 35.73 | p | 44.25 | o | 51.09 | m | 55.25 | o | 66.21 | d | 75.84 | c | 72.21 | b | 59.88 | i | 54.21 | n | 41.61 | p | 35.29 | s | 71.42 | i |
1997 | 29.96 | s | 35.37 | m | 45.57 | p | 49.17 | o | 61.85 | k | 65.69 | d | 72.16 | c | 74.17 | b | 68.88 | i | 53.00 | n | 46.29 | r | 31.23 | p | 70.68 | i |
1998 | 37.13 | p | 39.90 | m | 42.39 | q | 51.28 | l | 54.42 | g | 61.57 | a | 77.85 | 75.07 | c | 70.76 | i | 51.21 | n | 41.18 | s | 30.39 | m | 71.50 | i | |
1999 | 32.21 | q | 33.70 | m | 42.67 | m | 45.60 | j | 54.45 | k | 64.30 | 70.78 | b | 73.15 | 61.67 | g | 53.58 | k | 45.29 | k | 31.76 | l | 69.41 | i | ||
2000 | 31.39 | l | 39.17 | i | 42.93 | h | 56.40 | i | 59.67 | j | 68.62 | f | 74.81 | d | 75.30 | c | 62.38 | 53.67 | j | 34.65 | m | 31.25 | o | 70.83 | i | |
2001 | 29.47 | p | 32.50 | m | 46.79 | q | 49.71 | m | 61.69 | d | 66.94 | c | 74.76 | b | 77.59 | d | 69.90 | i | 55.18 | q | 43.12 | q | 31.53 | m | 70.25 | h |
2002 | 31.16 | l | 33.11 | i | 40.72 | m | 50.47 | k | 58.93 | h | 69.35 | c | 80.43 | j | 71.30 | k | 68.74 | g | 51.21 | n | 42.85 | j | 38.77 | k | 69.35 | k |
2003 | 38.25 | k | 35.56 | l | 44.48 | k | 49.90 | j | 56.67 | j | 67.44 | f | 80.33 | d | 77.47 | b | 67.54 | d | 64.50 | l | 37.17 | l | 38.60 | k | 75.11 | i |
2004 | 29.92 | m | 36.56 | k | 49.98 | i | 54.21 | i | 58.13 | e | 68.78 | g | 76.31 | g | 75.81 | d | 65.90 | o | 58.64 | q | 39.79 | k | 36.55 | j | 66.97 | j |
2005 | 33.24 | l | 37.21 | k | 46.32 | i | 50.69 | i | 57.08 | k | 64.00 | i | 76.96 | h | 76.54 | c | 63.84 | b | 55.62 | j | 40.11 | k | 28.79 | n | 70.19 | j |
2006 | 35.88 | n | 35.00 | k | 43.30 | k | 52.56 | m | 61.72 | f | 69.06 | c | 81.00 | h | 73.20 | c | 64.88 | d | 54.53 | n | 42.32 | m | 31.46 | r | 69.05 | i |
2007 | 29.94 | o | 39.47 | k | 47.50 | o | 49.79 | k | 62.52 | k | 71.86 | l | 82.52 | g | 75.47 | n | 67.50 | j | 53.83 | m | 44.95 | t | 33.44 | n | ----- | z |
2008 | 23.14 | q | 31.00 | u | 39.56 | o | 47.14 | p | 63.17 | s | 71.92 | r | 78.03 | l | 74.89 | h | 63.50 | y | 52.25 | u | 45.50 | a | 30.87 | d | 38.19 | j |
2009 | 34.70 | u | 37.69 | b | 41.79 | e | 50.33 | a | 59.85 | a | 67.14 | a | 75.92 | 73.18 | 69.69 | a | 48.53 | a | 42.46 | d | 26.85 | e | 53.95 | a | ||
2010 | 36.82 | 38.86 | 43.42 | 48.22 | 51.77 | a | 65.67 | 73.06 | 70.72 | a | 66.02 | 55.97 | 38.60 | 35.27 | 52.03 | |||||||||||
2011 | 29.56 | 34.31 | a | 42.17 | j | 45.67 | o | 54.79 | g | 58.88 | q | 73.66 | 75.95 | 70.10 | 54.22 | a | 39.08 | 30.73 | 50.95 | d | ||||||
2012 | 34.00 | 36.52 | ----- | z | 52.70 | 56.05 | t | 64.98 | 77.76 | 75.98 | 67.38 | 52.45 | 44.40 | 35.07 | a | 54.12 | b | |||||||||
2013 | 21.03 | 34.88 | 44.19 | 48.07 | 59.23 | 68.18 | 79.55 | 77.47 | ----- | z | 51.10 | 41.17 | a | 26.23 | 50.10 | a | ||||||||||
2014 | 32.74 | 40.04 | ----- | z | 52.20 | j | 60.66 | 66.07 | 80.06 | 75.79 | 68.22 | 59.58 | 38.30 | 41.43 | c | 56.29 | b | |||||||||
2015 | 34.56 | 43.13 | a | 47.60 | 50.98 | 62.16 | 75.17 | 75.94 | 77.00 | 67.73 | 60.85 | 38.13 | 32.73 | 55.50 | ||||||||||||
2016 | 34.89 | 41.48 | 47.24 | 55.02 | a | 59.06 | 69.80 | 72.65 | a | 73.26 | 62.65 | 55.10 | 46.33 | a | 24.26 | 53.48 | ||||||||||
2017 | 23.05 | 37.71 | 47.77 | 48.93 | 58.77 | 68.13 | 80.73 | 77.21 | 65.05 | 49.32 | 44.32 | 29.68 | 52.56 | |||||||||||||
2018 | 38.27 | 33.59 | 42.37 | 51.20 | 63.10 | 67.28 | 78.10 | 74.76 | 64.85 | 52.03 | 39.42 | 31.15 | 53.01 | |||||||||||||
2019 | 34.79 | 33.11 | 40.52 | g | 53.07 | a | 58.37 | 66.17 | 74.87 | 75.27 | 64.70 | 44.82 | 40.97 | 36.03 | 52.92 | a | ||||||||||
2020 | 36.71 | 35.67 | 44.15 | 50.83 | 59.29 | 65.20 | 74.34 | 75.56 | f | 67.98 | 52.50 | 39.90 | 32.77 | 50.85 | a | |||||||||||
2021 | 36.02 | 33.88 | 43.97 | 51.12 | 58.68 | 74.73 | 82.45 | 72.61 | 65.02 | a | 54.05 | 44.67 | 34.02 | 54.27 | ||||||||||||
2022 | 28.27 | 32.98 | 44.21 | 45.65 | 54.79 | 66.25 | 79.27 | 80.15 | 69.98 | 56.84 | 33.20 | 29.65 | 51.77 | |||||||||||||
2023 | 32.21 | 33.45 | 37.16 | 47.25 | 63.56 | 66.33 | 78.32 | 75.35 | 66.00 | 54.63 | 42.48 | 35.53 | 52.69 | |||||||||||||
2024 | 32.61 | 40.34 | 42.70 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.55 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.23 | 36.50 | 42.87 | 49.89 | 58.46 | 66.80 | 75.26 | 74.11 | 64.93 | 53.70 | 40.85 | 31.81 | 52.51 | |||||||||||||
S.D. | 5.42 | 4.46 | 3.15 | 3.07 | 3.08 | 3.27 | 3.32 | 3.05 | 3.52 | 3.46 | 3.41 | 4.74 | 1.53 | |||||||||||||
SKEW | -0.49 | -1.03 | -0.03 | -0.15 | 0.16 | 0.38 | -0.57 | -0.01 | -0.04 | -0.03 | -1.25 | -1.03 | 0.12 | |||||||||||||
MAX | 38.27 | 44.37 | 50.03 | 56.85 | 67.11 | 75.68 | 82.45 | 80.90 | 72.78 | 60.85 | 46.33 | 41.43 | 55.50 | |||||||||||||
MIN | 17.98 | 20.54 | 36.92 | 42.28 | 51.77 | 59.48 | 62.81 | 67.88 | 57.26 | 44.82 | 28.37 | 15.18 | 49.83 | |||||||||||||
YRS | 38 | 41 | 38 | 41 | 48 | 60 | 58 | 63 | 57 | 43 | 41 | 40 | 24 |