YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | 49.80 | t | 47.03 | 59.80 | 66.06 | 65.16 | 62.63 | 44.48 | 33.30 | 34.94 | 51.68 | d | ||||||||
1947 | 29.77 | 33.61 | 35.74 | 40.03 | 52.06 | 57.83 | 65.40 | a | 65.00 | 60.13 | 48.23 | a | 34.90 | 29.03 | a | 45.98 | ||||||||||
1948 | 29.40 | a | 31.32 | a | 33.68 | 41.97 | 47.32 | 57.83 | a | 65.29 | 63.55 | 59.47 | 49.42 | 29.00 | 34.90 | b | 45.26 | |||||||||
1949 | 28.35 | h | 30.79 | 36.58 | 42.80 | 46.94 | 58.23 | 66.74 | 61.42 | 62.40 | 45.74 | 39.70 | 31.84 | 47.56 | a | |||||||||||
1950 | 30.71 | 34.56 | a | 37.20 | a | 43.47 | 46.00 | a | 56.13 | 65.74 | 61.42 | 55.23 | 51.10 | a | 38.93 | 32.68 | 46.10 | |||||||||
1951 | 30.45 | 33.75 | 36.52 | b | 42.13 | 47.90 | 52.47 | 67.71 | 64.16 | 56.93 | 48.87 | 40.07 | a | 34.94 | 46.33 | |||||||||||
1952 | 34.52 | 28.57 | a | 30.94 | 41.03 | 49.50 | a | 58.48 | e | 65.43 | c | 66.90 | b | 59.80 | 49.10 | 37.33 | 31.26 | 46.07 | ||||||||
1953 | 31.33 | a | 29.70 | a | 37.90 | 41.24 | a | 43.29 | 58.43 | 68.26 | 64.39 | 56.50 | 45.68 | 39.00 | 26.00 | 45.14 | ||||||||||
1954 | 33.10 | 36.57 | 38.71 | 45.07 | 49.71 | 56.77 | 66.65 | 62.10 | 59.70 | 48.55 | 36.76 | a | 32.26 | 47.16 | ||||||||||||
1955 | 27.35 | 25.64 | 36.39 | 37.13 | 45.97 | 56.67 | 63.67 | a | 64.77 | 54.23 | 48.03 | a | 36.83 | 32.94 | 44.14 | |||||||||||
1956 | 33.45 | 27.21 | 33.06 | 39.50 | 48.19 | 59.87 | 63.65 | 60.90 | 57.93 | 45.23 | 34.00 | 29.90 | 44.41 | |||||||||||||
1957 | 37.13 | 41.00 | 37.97 | 40.80 | 45.29 | 61.83 | 69.55 | 66.03 | 55.90 | 50.13 | 34.17 | 31.90 | 47.64 | |||||||||||||
1958 | 28.97 | 36.46 | 36.52 | 40.60 | 52.74 | 58.43 | 53.65 | e | 50.39 | 59.30 | 50.35 | 37.90 | 33.43 | a | 44.90 | |||||||||||
1959 | 32.00 | 33.70 | e | 34.57 | c | 44.20 | e | 46.47 | a | 61.20 | 67.31 | b | 64.70 | a | 56.85 | d | 45.55 | k | 38.93 | 34.16 | 46.73 | a | ||||
1960 | 29.35 | 27.52 | d | 37.93 | d | 41.48 | a | 46.87 | a | 59.08 | d | 64.64 | f | 63.93 | b | 56.15 | d | 44.00 | f | 37.00 | e | 27.91 | h | 44.37 | c | |
1961 | 35.07 | b | 30.45 | f | 35.85 | e | 41.52 | e | 46.62 | b | 60.00 | a | 65.89 | c | 64.11 | d | 56.29 | f | 44.59 | i | 36.50 | d | 34.48 | f | 48.19 | d |
1962 | 32.41 | d | 37.80 | h | 32.74 | d | 42.45 | h | 45.59 | b | 52.34 | a | 65.87 | 64.93 | a | 62.38 | a | 47.71 | g | 39.68 | e | 36.90 | 48.09 | c | ||
1963 | 30.23 | 36.00 | 34.19 | 38.57 | 48.45 | 51.30 | 65.48 | 64.61 | 60.13 | 49.48 | 38.17 | 31.77 | 45.70 | |||||||||||||
1964 | 24.84 | 24.41 | 32.84 | 38.33 | 46.00 | 55.53 | 66.52 | b | 63.45 | b | 59.10 | a | 48.61 | 34.27 | 33.35 | 43.94 | ||||||||||
1965 | 33.87 | 29.57 | 33.03 | 40.87 | 44.25 | c | 51.67 | 65.39 | 63.77 | a | 55.83 | 45.71 | 41.53 | 36.29 | 45.15 | |||||||||||
1966 | 28.35 | 29.54 | 36.19 | 41.83 | 50.77 | 58.23 | 66.45 | 65.42 | 59.93 | a | 45.06 | 40.20 | 35.19 | e | 46.43 | |||||||||||
1967 | 28.91 | i | 32.70 | a | 38.03 | b | 38.87 | 45.45 | 55.40 | 64.68 | 61.45 | 57.47 | 44.87 | 38.07 | 30.45 | 46.13 | a | |||||||||
1968 | 32.06 | 36.55 | 37.73 | a | 40.97 | a | 46.10 | 56.50 | 64.65 | 61.65 | 56.40 | 44.42 | 36.33 | 27.71 | 45.09 | |||||||||||
1969 | 36.03 | 33.25 | 32.94 | 41.37 | 48.50 | e | 57.75 | b | 67.48 | 65.61 | 58.00 | 41.90 | 40.03 | 32.80 | f | 47.53 | a | |||||||||
1970 | 28.29 | 34.93 | a | 35.84 | 36.23 | 48.00 | 57.53 | 65.77 | 65.03 | 57.33 | 42.23 | 37.83 | 34.58 | 45.30 | ||||||||||||
1971 | 28.71 | 31.07 | 34.68 | 38.10 | 44.68 | 56.13 | 67.29 | 64.00 | 59.23 | 46.61 | 36.03 | 32.74 | 44.94 | |||||||||||||
1972 | 28.84 | 31.10 | 41.13 | 39.87 | 47.23 | 58.60 | 65.42 | 63.68 | 57.33 | 49.87 | 32.33 | 30.09 | h | 46.85 | a | |||||||||||
1973 | 20.55 | 26.25 | 34.65 | 37.67 | 47.58 | 59.43 | 62.61 | 62.74 | 54.07 | 39.94 | 32.33 | 28.87 | 42.22 | |||||||||||||
1974 | 30.71 | 28.26 | a | 38.93 | a | 40.38 | a | 47.69 | b | 60.43 | 65.47 | a | 63.61 | 59.90 | 50.62 | b | 37.14 | b | 28.38 | b | 45.96 | |||||
1975 | 31.40 | f | 30.61 | 35.87 | 37.03 | 45.52 | b | 55.53 | 66.10 | 63.87 | a | 59.00 | a | 45.39 | 36.07 | 33.87 | 46.26 | a | ||||||||
1976 | 31.55 | 37.93 | a | 34.77 | a | 41.39 | b | 48.26 | 56.55 | a | 65.35 | 61.77 | a | 57.86 | a | 46.17 | a | 38.44 | c | 31.80 | a | 45.99 | ||||
1977 | 34.52 | 32.63 | a | 32.66 | b | 43.40 | 46.87 | a | 59.07 | 67.68 | 66.20 | a | 61.28 | a | 53.55 | 38.87 | 37.55 | b | 47.85 | |||||||
1978 | 36.39 | 35.54 | 42.74 | 40.17 | 46.23 | a | 57.57 | 66.33 | a | 62.77 | 59.80 | 51.10 | 40.00 | b | 33.11 | c | 47.65 | |||||||||
1979 | 33.68 | 33.61 | 36.29 | 40.70 | 49.16 | 57.30 | 65.16 | 61.61 | 59.76 | a | 47.90 | 33.77 | 33.21 | b | 46.01 | |||||||||||
1980 | 37.30 | a | 40.28 | 38.13 | a | 41.70 | 46.61 | 58.24 | a | 69.10 | 65.48 | 59.07 | 48.13 | 37.67 | 37.70 | a | 48.28 | |||||||||
1981 | 38.35 | 36.71 | 38.23 | 46.10 | 49.84 | 62.30 | 67.90 | 63.90 | 58.53 | 46.13 | 38.62 | a | 32.27 | a | 48.24 | |||||||||||
1982 | 33.35 | 36.70 | a | 38.69 | b | 42.48 | a | 47.19 | 52.67 | c | 65.37 | a | 65.58 | 59.38 | a | 43.12 | e | 38.86 | a | 33.77 | 46.43 | |||||
1983 | 33.35 | 34.19 | b | 38.39 | 37.30 | 45.45 | 53.23 | 65.55 | 63.90 | 63.43 | 51.61 | 38.30 | 36.29 | 46.75 | ||||||||||||
1984 | 34.68 | 31.59 | 37.65 | 41.70 | 52.87 | 60.00 | 64.67 | a | 64.27 | a | 59.86 | a | 47.93 | b | 36.87 | 36.57 | a | 47.39 | ||||||||
1985 | 34.84 | 33.75 | 39.00 | a | 44.27 | 49.45 | 58.17 | 65.55 | 63.97 | 54.97 | 48.65 | 38.57 | 31.03 | b | 46.85 | |||||||||||
1986 | 35.41 | b | 37.54 | 41.32 | 44.80 | 48.87 | 60.47 | 64.17 | b | 66.67 | a | 53.73 | 46.10 | 41.03 | 33.84 | 47.83 | ||||||||||
1987 | 29.39 | 33.57 | 34.84 | 46.47 | 49.26 | 58.47 | 62.61 | 63.06 | 56.24 | a | 51.19 | 35.13 | 30.06 | 45.86 | ||||||||||||
1988 | 29.97 | b | 36.04 | a | 34.97 | 42.54 | b | 47.65 | 59.00 | 66.29 | 66.57 | a | 54.60 | 52.10 | a | 35.07 | b | 29.56 | d | 46.19 | ||||||
1989 | 28.77 | e | 35.56 | c | 40.50 | c | 45.14 | b | 49.78 | d | 57.96 | f | 68.40 | a | 64.26 | d | 57.70 | c | 48.61 | 36.62 | a | 31.60 | a | 46.09 | a | |
1990 | 28.69 | b | 30.93 | 38.90 | a | 44.97 | a | 49.13 | a | 62.61 | b | 65.81 | j | 61.83 | a | 60.93 | b | 46.81 | e | 38.52 | a | 31.67 | a | 45.00 | a | |
1991 | 31.69 | b | 36.35 | b | 36.63 | l | 38.96 | b | 46.00 | a | 54.41 | h | 65.21 | b | 65.07 | b | 59.10 | 47.30 | a | 35.69 | a | 35.33 | j | 47.26 | c | |
1992 | 32.82 | c | 37.08 | c | 39.00 | 43.90 | a | 51.00 | c | 54.25 | b | 64.61 | 65.13 | a | 58.27 | 47.48 | 32.00 | a | 34.20 | a | 46.65 | |||||
1993 | 38.46 | c | 34.62 | d | 36.37 | a | 41.57 | 51.00 | b | 56.63 | 64.90 | a | 65.90 | a | 55.28 | a | 46.80 | a | 35.79 | b | 31.52 | b | 46.57 | |||
1994 | 28.55 | 32.71 | 40.86 | b | 46.17 | l | 49.40 | a | 63.80 | 67.16 | 68.26 | 60.39 | b | 45.32 | c | 37.85 | d | 34.59 | b | 48.08 | a | |||||
1995 | 34.00 | c | 39.58 | d | 38.26 | 39.37 | 46.65 | 53.21 | a | 63.84 | ----- | z | 60.86 | a | 45.55 | 39.65 | g | 32.72 | f | 46.81 | c | |||||
1996 | 30.74 | d | 34.54 | a | 38.07 | a | 42.43 | 50.97 | 62.57 | 69.03 | a | 65.67 | a | 57.30 | 46.03 | 38.96 | b | 31.27 | a | 47.30 | ||||||
1997 | 34.24 | b | 30.93 | a | 41.55 | 43.43 | 53.00 | 56.27 | 63.94 | 64.90 | 60.63 | 43.81 | 36.57 | b | 28.90 | 46.51 | ||||||||||
1998 | 29.42 | 32.64 | 37.77 | 37.93 | 46.71 | 54.07 | 66.55 | 65.39 | 58.97 | a | 45.80 | a | 36.46 | b | 30.34 | b | 45.17 | |||||||||
1999 | 28.83 | b | 32.54 | b | 35.97 | b | 39.80 | 47.87 | a | 60.21 | a | 67.27 | a | 65.27 | a | 60.60 | 48.10 | 38.79 | b | 28.96 | d | 46.18 | ||||
2000 | 30.85 | d | 35.56 | b | 36.93 | c | 45.04 | b | 53.27 | a | 63.57 | 66.35 | 65.84 | 60.31 | a | 50.74 | 33.59 | a | 32.39 | c | 47.87 | |||||
2001 | 30.73 | a | 32.39 | 37.03 | a | 43.27 | 51.35 | 60.10 | a | 67.52 | 64.37 | d | 59.07 | a | 49.00 | 40.36 | b | 28.42 | g | 48.65 | a | |||||
2002 | 30.73 | a | 32.37 | a | 33.52 | 46.13 | 47.06 | 60.17 | 65.36 | c | 64.80 | a | 59.69 | d | 46.58 | ----- | z | 30.89 | d | 47.03 | a | |||||
2003 | 34.86 | b | 36.05 | g | 38.13 | 40.31 | a | 49.28 | b | 58.10 | 68.66 | b | 67.61 | 60.57 | 53.35 | e | 39.38 | d | 31.26 | 49.23 | a | |||||
2004 | 34.93 | d | 30.07 | a | 44.63 | a | 44.70 | 50.26 | 58.17 | a | 65.72 | b | 63.52 | 59.33 | 48.45 | 36.45 | a | 32.21 | b | 47.37 | ||||||
2005 | 34.93 | b | 39.50 | 37.39 | 42.87 | 52.77 | 59.14 | a | 67.32 | 65.23 | a | 59.48 | a | 49.65 | 38.89 | b | 31.19 | d | 48.20 | |||||||
2006 | 29.14 | b | 33.81 | b | 36.03 | a | 43.33 | 51.84 | 63.33 | 68.26 | 65.84 | 57.20 | 47.54 | c | 36.94 | l | 28.58 | 47.72 | a | |||||||
2007 | 27.43 | a | 32.96 | 38.90 | a | 44.07 | 50.55 | 59.83 | 68.52 | 67.39 | 60.87 | 47.29 | 42.62 | a | 31.00 | a | 47.62 | |||||||||
2008 | 32.48 | b | 37.75 | q | 36.10 | 41.23 | 47.81 | 60.67 | 65.94 | 65.56 | d | 59.33 | 48.23 | a | 40.03 | 34.26 | 48.33 | a | ||||||||
2009 | 34.42 | 33.89 | 38.84 | 43.10 | 54.00 | 59.07 | 68.00 | 65.32 | 60.17 | 46.94 | 40.25 | b | 31.13 | 47.93 | ||||||||||||
2010 | 33.97 | 35.00 | 34.37 | a | 41.67 | 45.03 | 58.87 | 68.94 | 66.90 | 60.80 | 49.23 | 34.17 | 35.37 | a | 47.02 | |||||||||||
2011 | 28.94 | 29.79 | 38.45 | 44.60 | 45.90 | 58.40 | 67.19 | 68.70 | a | 61.20 | 48.06 | 38.60 | 31.13 | a | 46.75 | |||||||||||
2012 | 33.16 | 33.83 | 34.74 | 44.73 | 50.23 | 60.07 | a | 67.77 | 66.71 | 57.46 | b | 47.90 | b | 41.63 | c | 33.17 | a | 47.62 | ||||||||
2013 | 28.35 | 26.83 | d | 40.42 | 44.23 | 44.23 | 55.92 | f | 67.60 | a | 66.06 | 61.76 | e | 41.63 | d | 41.83 | a | 30.71 | c | 44.88 | a | |||||
2014 | 30.00 | a | 30.41 | a | 36.58 | 31.17 | 47.71 | 60.93 | 67.32 | 63.39 | 62.66 | a | 50.52 | 33.21 | a | 30.00 | a | 45.32 | ||||||||
2015 | 35.06 | 38.33 | a | 42.03 | 41.21 | b | 48.07 | a | 62.07 | 66.55 | 67.29 | 62.23 | 53.16 | 35.10 | a | 29.37 | a | 48.37 | ||||||||
2016 | 31.23 | 34.17 | 37.39 | 41.67 | 46.45 | b | 62.33 | 68.52 | ----- | z | 56.00 | n | 49.52 | 39.80 | 35.10 | a | 44.62 | b | ||||||||
2017 | 32.57 | a | 36.57 | 41.13 | 42.03 | 49.13 | 60.87 | 67.16 | 64.00 | 56.44 | c | 49.07 | a | 43.14 | b | 34.07 | a | 48.01 | ||||||||
2018 | 33.71 | 35.36 | 38.48 | 44.27 | 48.77 | 58.37 | 65.65 | 65.03 | a | 60.52 | c | 50.31 | b | 34.54 | b | 32.93 | a | 47.33 | ||||||||
2019 | 31.40 | a | 29.84 | c | 36.25 | g | 41.83 | a | 44.77 | a | 55.40 | 65.35 | h | ----- | z | ----- | z | 41.10 | j | 42.95 | j | 33.11 | v | 40.65 | g | |
2020 | ----- | z | 31.83 | 39.17 | a | 41.53 | 50.40 | a | 57.83 | a | 67.35 | 65.84 | 59.40 | 46.87 | 39.50 | b | 28.00 | b | 47.97 | a | ||||||
2021 | 29.61 | 30.14 | g | 33.26 | 44.30 | 47.35 | 61.17 | 65.91 | h | 65.67 | a | 60.59 | a | 45.19 | e | 40.50 | b | 34.73 | a | 46.24 | b | |||||
2022 | 32.37 | a | 29.88 | b | 34.20 | a | ----- | z | 37.57 | j | 63.92 | r | 68.26 | 65.87 | 61.27 | 49.74 | 34.38 | a | 32.58 | e | 45.39 | c | ||||
2023 | 30.81 | 32.71 | 32.90 | b | 40.63 | 47.00 | 52.13 | ----- | z | 67.23 | e | 59.41 | a | 50.83 | a | 42.59 | c | 33.22 | d | 44.50 | a | |||||
2024 | 32.38 | e | 37.62 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.00 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.76 | 33.22 | 36.98 | 41.64 | 48.18 | 58.20 | 66.17 | 64.51 | 58.90 | 47.74 | 37.48 | 32.33 | 46.41 | |||||||||||||
S.D. | 3.12 | 3.53 | 2.71 | 2.68 | 2.41 | 2.95 | 2.15 | 2.37 | 2.23 | 2.76 | 2.82 | 2.49 | 1.31 | |||||||||||||
SKEW | -0.39 | -0.18 | 0.22 | -0.85 | 0.43 | -0.44 | -2.70 | -2.83 | -0.39 | -0.31 | -0.39 | -0.03 | -0.68 | |||||||||||||
MAX | 38.46 | 41.00 | 44.63 | 46.47 | 54.00 | 63.80 | 69.55 | 68.70 | 63.43 | 53.55 | 43.14 | 37.70 | 48.37 | |||||||||||||
MIN | 20.55 | 24.41 | 30.94 | 31.17 | 43.29 | 51.30 | 53.65 | 50.39 | 53.73 | 39.94 | 29.00 | 26.00 | 42.22 | |||||||||||||
YRS | 74 | 73 | 75 | 74 | 77 | 74 | 73 | 75 | 75 | 73 | 74 | 70 | 51 |