YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.81 | 56.78 | 48.48 | 36.22 | 24.89 | 45.84 | g | |||||
1949 | 18.71 | 29.71 | 36.38 | b | 50.46 | b | 50.89 | c | 59.31 | a | 66.28 | d | 63.88 | c | 60.55 | a | 46.48 | d | 46.84 | b | 30.34 | 46.65 | ||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.02 | g | 43.65 | 33.84 | 38.74 | j | ||
1960 | 28.84 | c | 32.52 | g | 41.64 | i | 40.48 | f | 47.27 | 64.05 | a | 72.05 | b | 66.29 | 63.48 | 51.35 | 36.60 | a | 33.58 | f | 53.74 | d | ||||
1961 | 37.97 | 36.60 | g | 37.05 | a | 43.82 | 49.77 | c | 64.48 | 69.27 | 69.94 | 56.62 | b | 49.58 | 37.86 | a | 31.00 | 49.76 | a | |||||||
1962 | 28.13 | a | 32.93 | a | 35.32 | 48.82 | 47.55 | 58.53 | a | 66.50 | 64.50 | 63.08 | 49.50 | 42.18 | 36.80 | a | 47.82 | |||||||||
1963 | 32.68 | a | 42.32 | 36.10 | b | 37.40 | 53.18 | 55.97 | 61.84 | 64.35 | 62.67 | 50.73 | 39.02 | 35.76 | 47.67 | |||||||||||
1964 | ----- | z | ----- | z | 34.15 | 41.07 | b | 47.84 | 54.92 | 65.79 | c | 64.43 | a | 57.00 | 54.42 | 35.69 | a | 32.65 | 48.79 | b | ||||||
1965 | 32.21 | 35.63 | b | 40.37 | a | 44.20 | 49.31 | 57.10 | 63.50 | 62.02 | 55.60 | 56.05 | 39.64 | a | 30.65 | a | 47.19 | |||||||||
1966 | 30.82 | 31.32 | 37.68 | 46.95 | 55.82 | 56.52 | a | 63.30 | a | 66.66 | b | 60.24 | a | 50.60 | 38.32 | 33.16 | 47.62 | |||||||||
1967 | 31.95 | b | 37.54 | 35.26 | 34.23 | 52.05 | 58.58 | 69.48 | 72.00 | 63.47 | 48.91 | b | 41.76 | a | 26.98 | b | 47.68 | |||||||||
1968 | 28.72 | a | 38.74 | 40.71 | 42.98 | 50.11 | 60.03 | 70.47 | 61.32 | 59.82 | 48.10 | 37.62 | 28.16 | 47.23 | ||||||||||||
1969 | 27.95 | 29.75 | 36.26 | 43.10 | 55.24 | 58.92 | 66.77 | 66.40 | 61.38 | a | 43.50 | 40.77 | 33.82 | a | 46.99 | |||||||||||
1970 | 32.35 | 38.20 | 37.58 | 38.22 | 52.68 | 61.40 | a | 68.84 | 68.11 | 55.84 | a | 48.30 | c | 40.00 | 26.76 | b | 47.36 | |||||||||
1971 | 32.16 | 34.84 | 34.27 | 41.83 | 49.45 | 54.90 | 67.81 | 70.15 | 55.78 | 44.13 | 37.50 | a | 26.06 | 45.74 | ||||||||||||
1972 | 26.92 | 35.03 | 43.42 | a | 40.77 | 53.58 | 61.08 | 68.77 | 67.31 | 55.73 | 47.85 | 34.90 | 26.08 | 46.79 | ||||||||||||
1973 | 27.71 | 34.46 | 35.68 | 45.42 | 56.26 | 60.98 | 68.20 | c | 66.60 | 58.83 | c | 48.25 | c | ----- | z | ----- | z | 50.24 | b | |||||||
1974 | 25.72 | a | 31.05 | 35.53 | 40.68 | ----- | z | ----- | z | 65.26 | 66.95 | 64.13 | 50.81 | d | 38.65 | c | 31.36 | b | 45.02 | b | ||||||
1975 | 30.05 | c | 30.12 | b | 33.30 | d | 34.66 | e | 52.06 | d | 57.82 | e | 66.57 | c | 62.82 | 64.72 | 46.37 | 35.00 | b | 34.48 | a | 45.66 | ||||
1976 | 33.81 | 34.52 | b | 34.20 | a | 40.24 | e | 53.84 | 55.57 | a | 67.31 | 59.95 | 61.36 | a | 52.33 | b | 45.08 | 35.31 | 47.79 | |||||||
1977 | 26.40 | 37.75 | 33.34 | c | 47.73 | 43.15 | a | 63.97 | ----- | z | 70.22 | a | 57.58 | 50.23 | a | 38.40 | 34.71 | 45.77 | a | |||||||
1978 | 35.02 | 36.50 | 43.94 | 40.98 | a | ----- | z | ----- | z | ----- | z | ----- | z | 55.09 | h | ----- | z | ----- | z | ----- | z | 39.11 | h | |||
1979 | ----- | z | ----- | z | 40.61 | 42.96 | g | ----- | z | ----- | z | ----- | z | ----- | z | 62.83 | d | ----- | z | 37.10 | 35.10 | a | 43.91 | h | ||
1980 | ----- | z | 38.52 | e | 36.06 | 44.65 | c | 50.45 | 53.73 | d | 67.30 | c | 65.53 | l | 60.12 | e | 52.05 | c | 40.32 | h | 35.50 | c | 48.71 | c | ||
1981 | 36.41 | c | 35.89 | a | 38.98 | h | 45.58 | f | 50.72 | a | 59.23 | 66.47 | 69.92 | 61.35 | 46.37 | 39.52 | b | 34.93 | c | 50.08 | b | |||||
1982 | 28.20 | a | 31.72 | c | 35.69 | e | 39.46 | b | 51.69 | b | 58.50 | a | 65.12 | b | ----- | z | 55.07 | a | 46.40 | k | 35.52 | j | 29.40 | g | 45.68 | d |
1983 | 34.39 | d | 35.87 | b | 38.16 | 39.57 | i | 52.40 | 56.34 | k | 62.78 | h | 66.00 | c | 59.77 | j | 52.54 | c | 37.09 | c | 30.85 | 43.41 | d | |||
1984 | 33.35 | a | 35.65 | e | 41.59 | c | 43.52 | c | 53.48 | a | 58.92 | e | 69.59 | h | 67.97 | 60.36 | b | 45.22 | d | 34.89 | b | 28.40 | a | 45.76 | a | |
1985 | 30.02 | 32.54 | a | 35.65 | 50.39 | c | 50.38 | a | 63.26 | a | 70.95 | a | 65.23 | a | 52.91 | c | 47.65 | e | 30.87 | 32.52 | 46.86 | |||||
1986 | 38.78 | a | 38.75 | 44.25 | a | 44.13 | c | 52.45 | b | 64.86 | a | 65.76 | 72.24 | 53.47 | a | ----- | z | 40.28 | e | 32.63 | e | 49.78 | a | |||
1987 | 28.69 | b | 36.22 | c | 38.64 | b | 51.31 | a | 56.25 | c | ----- | z | 61.69 | 68.24 | 63.47 | 57.90 | 39.15 | c | 29.83 | e | 48.31 | a | ||||
1988 | 29.73 | c | 38.45 | 39.78 | a | 46.90 | d | 48.60 | e | 61.75 | b | 71.26 | 70.23 | a | 62.57 | a | ----- | z | 38.35 | c | 32.27 | c | 49.08 | a | ||
1989 | 27.02 | c | 26.40 | c | 38.50 | 49.12 | 48.42 | 61.72 | 66.19 | 63.34 | 59.10 | 47.79 | c | 41.59 | a | 36.89 | 47.17 | |||||||||
1990 | 32.93 | d | 32.04 | c | 40.50 | d | 50.12 | 48.73 | 57.65 | 67.88 | a | 65.60 | e | 62.06 | f | 50.40 | e | 36.83 | c | 26.15 | h | 48.27 | b | |||
1991 | 33.59 | d | 42.80 | 33.46 | d | 41.86 | h | 48.62 | r | 55.08 | l | 68.92 | e | 68.02 | f | 65.87 | 54.04 | g | 41.80 | h | 32.74 | f | 48.93 | g | ||
1992 | 34.16 | c | 40.00 | 43.50 | 50.00 | d | 60.66 | 63.15 | 66.73 | 71.34 | 61.81 | c | 54.02 | b | 37.45 | b | 28.05 | k | 52.98 | a | ||||||
1993 | 25.24 | b | 28.17 | b | 42.40 | b | 42.48 | 52.95 | 53.63 | c | 61.22 | b | 63.98 | a | 61.36 | b | 51.42 | m | 35.95 | a | 30.90 | f | 46.74 | b | ||
1994 | 35.30 | d | 32.00 | a | 42.67 | a | 46.81 | a | 53.85 | a | 59.58 | 72.33 | a | 68.35 | e | 62.06 | c | 48.35 | 30.29 | a | 30.38 | b | 48.50 | |||
1995 | 34.24 | 43.39 | 36.87 | a | 42.28 | 51.26 | 56.72 | a | 65.15 | 64.94 | 63.02 | 50.05 | b | 45.17 | a | 35.36 | b | 49.04 | ||||||||
1996 | 34.24 | 35.84 | 40.77 | 44.18 | 49.50 | 59.45 | 70.29 | 68.79 | 57.15 | 49.95 | 39.80 | b | 33.23 | c | 48.60 | |||||||||||
1997 | 30.33 | a | 33.96 | a | 41.65 | 42.63 | 56.18 | 57.03 | a | 65.58 | 66.34 | 58.77 | 46.95 | 38.40 | a | 26.62 | e | 47.04 | ||||||||
1998 | 34.79 | b | 32.86 | c | 38.80 | a | 43.47 | 45.38 | c | 57.64 | a | 70.59 | b | 70.57 | c | 64.05 | 50.08 | f | 38.48 | d | 27.96 | e | 47.69 | a | ||
1999 | 34.05 | c | 31.18 | c | 37.15 | d | 40.42 | d | 50.68 | c | 58.08 | d | 66.46 | c | 65.76 | 61.37 | 53.32 | a | 43.94 | e | 33.48 | f | 49.31 | a | ||
2000 | 32.74 | f | 36.70 | b | 39.30 | a | 47.65 | 52.43 | a | 63.74 | a | 66.10 | 68.87 | 58.13 | 49.52 | a | 35.08 | 34.72 | a | 50.20 | a | |||||
2001 | 33.24 | b | 32.66 | 42.42 | 42.33 | 58.93 | a | 58.87 | c | 68.15 | 70.58 | 62.92 | 53.92 | a | 39.37 | 31.06 | 49.54 | |||||||||
2002 | 30.60 | 36.65 | a | 37.65 | 46.80 | b | 50.95 | 62.16 | a | 72.43 | b | 66.55 | 62.07 | a | 49.06 | 41.19 | a | 35.15 | h | 50.55 | a | |||||
2003 | 39.36 | c | 34.54 | a | 40.85 | 38.60 | a | 52.12 | a | 64.83 | a | 73.07 | a | 67.97 | 64.80 | 55.58 | a | 35.35 | 33.74 | d | 50.07 | |||||
2004 | 33.24 | b | 33.91 | a | 46.84 | 47.42 | 52.65 | 61.65 | 69.71 | 68.89 | 59.22 | 48.53 | 37.53 | 34.82 | c | 49.53 | ||||||||||
2005 | 32.34 | 36.73 | 41.92 | 42.76 | a | 51.81 | 54.55 | a | 72.29 | b | 69.82 | a | 58.45 | 48.60 | a | 37.31 | a | 33.27 | 48.32 | |||||||
2006 | 32.94 | 33.93 | 32.15 | 42.98 | 54.40 | 62.77 | b | 70.13 | a | 65.42 | a | 60.78 | 48.22 | a | 37.93 | 31.77 | 47.79 | |||||||||
2007 | 29.33 | b | 35.08 | b | 43.37 | d | 45.91 | b | 54.69 | 60.82 | 69.67 | a | 67.48 | 57.67 | 45.07 | i | 39.20 | b | 27.70 | k | 50.32 | b | ||||
2008 | 25.96 | f | 34.11 | a | 39.04 | d | 41.76 | a | 52.94 | 59.72 | 69.69 | 69.25 | a | 63.25 | 51.34 | b | 40.18 | s | 31.77 | a | 51.29 | b | ||||
2009 | 33.07 | h | 35.06 | d | 36.02 | e | 44.50 | h | 54.50 | k | 59.69 | i | 71.44 | n | 70.73 | r | 64.57 | 44.97 | p | 37.87 | 28.32 | 40.37 | g | |||
2010 | 35.11 | l | 35.69 | a | 37.75 | k | 39.37 | 44.76 | d | 58.48 | 66.59 | t | 65.75 | c | 60.47 | a | 52.13 | 35.07 | p | 34.03 | 48.83 | d | ||||
2011 | 33.18 | 31.82 | 34.87 | 40.07 | b | 46.10 | 56.25 | 65.98 | 68.95 | 65.45 | 50.39 | 37.05 | 30.86 | q | 48.19 | a | ||||||||||
2012 | 33.64 | c | 34.14 | 34.91 | n | 42.71 | m | 52.65 | n | 58.14 | i | 67.92 | k | 71.38 | k | 65.09 | s | 49.84 | o | 41.77 | o | 27.88 | n | 33.89 | j | |
2013 | 28.22 | m | 32.54 | p | 41.53 | n | 43.09 | m | 51.96 | r | 58.10 | o | 73.23 | r | 65.80 | p | 58.20 | o | 48.79 | x | 41.36 | e | 28.52 | f | 41.36 | k |
2014 | 37.58 | 37.41 | 42.10 | 46.70 | 54.35 | 61.77 | 74.60 | 69.15 | 64.25 | 51.89 | l | 40.05 | t | 36.18 | 52.41 | b | ||||||||||
2015 | 37.29 | e | 42.15 | b | 46.04 | d | 44.52 | 53.92 | 67.83 | c | 69.39 | 69.32 | 61.62 | 54.47 | o | 36.53 | l | 30.89 | 52.30 | b | ||||||
2016 | 32.15 | u | 38.12 | p | 40.47 | o | 48.47 | o | 50.47 | m | 61.27 | h | 67.62 | w | 68.75 | o | 59.79 | r | 45.78 | o | 41.59 | n | 27.28 | o | ----- | z |
2017 | 26.80 | k | 38.06 | l | 41.81 | j | 42.90 | o | 56.00 | o | 59.21 | k | 71.30 | u | 71.06 | g | 62.22 | 47.10 | j | 40.46 | g | 33.50 | b | 47.86 | j | |
2018 | 37.90 | 33.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.80 | u | 40.85 | 33.62 | j | 37.40 | i | |||
2019 | 35.98 | a | 24.10 | r | 37.39 | 47.19 | c | 50.16 | 60.78 | 67.44 | 68.72 | d | 58.33 | 45.27 | 44.29 | i | 32.84 | 50.41 | b | |||||||
2020 | 35.22 | d | ----- | z | ----- | z | ----- | z | ----- | z | 57.67 | x | 66.90 | u | ----- | z | 65.76 | a | 52.50 | d | 37.75 | ----- | z | 47.81 | h | |
2021 | ----- | z | 33.84 | c | 35.80 | h | 48.07 | a | 54.29 | b | 65.90 | j | 75.12 | b | 70.09 | b | 61.54 | d | 48.88 | e | 41.54 | c | 33.16 | 51.84 | c | |
2022 | 37.26 | d | 37.15 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.92 | x | ----- | z | 31.57 | a | 29.82 | 33.95 | h | |
2023 | 30.63 | 32.32 | 31.42 | a | 43.11 | h | 55.14 | b | 62.33 | x | ----- | z | ----- | z | ----- | z | 51.42 | a | ----- | z | ----- | z | 40.18 | g | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 32.10 | 35.00 | 38.49 | 43.87 | 51.77 | 59.66 | 68.03 | 67.16 | 60.58 | 49.87 | 38.52 | 31.94 | 47.69 | |||||||||||||
S.D. | 3.98 | 3.52 | 3.67 | 4.02 | 3.40 | 3.24 | 3.14 | 2.84 | 3.21 | 3.05 | 3.30 | 3.11 | 1.11 | |||||||||||||
SKEW | -0.62 | 0.22 | 0.23 | -0.19 | -0.10 | 0.18 | 0.03 | -0.41 | -0.44 | 0.34 | 0.02 | -0.51 | 0.34 | |||||||||||||
MAX | 39.36 | 43.39 | 46.84 | 51.31 | 60.66 | 67.83 | 75.12 | 72.24 | 65.87 | 57.90 | 46.84 | 36.89 | 50.07 | |||||||||||||
MIN | 18.71 | 26.40 | 31.42 | 34.23 | 43.15 | 53.63 | 61.22 | 59.95 | 52.91 | 43.50 | 30.29 | 24.89 | 45.66 | |||||||||||||
YRS | 54 | 56 | 54 | 51 | 53 | 49 | 50 | 52 | 57 | 48 | 53 | 49 | 24 |