YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.89 | d | 60.07 | b | 46.83 | b | 26.29 | i | 29.85 | d | 50.66 | h |
1949 | 29.39 | 29.17 | d | 35.45 | 43.43 | 48.52 | b | 59.93 | b | 68.16 | 60.61 | 61.13 | 42.27 | a | 35.07 | 29.72 | b | 45.24 | ||||||||
1950 | 26.60 | a | 31.93 | a | 35.55 | 43.38 | a | 47.06 | 55.80 | 67.90 | b | 60.58 | 52.57 | 49.03 | a | 34.10 | 29.32 | 44.48 | ||||||||
1951 | 27.20 | a | 30.43 | 35.16 | 43.70 | 48.74 | 51.77 | 68.29 | 64.80 | a | 54.23 | 46.39 | 34.13 | 29.57 | a | 44.53 | ||||||||||
1952 | 29.70 | a | 26.54 | a | 33.07 | a | 43.89 | b | 51.38 | b | 60.26 | g | 67.63 | a | 66.46 | c | 55.83 | a | 43.59 | d | 32.71 | b | 26.67 | a | 43.41 | a |
1953 | 26.42 | 26.81 | a | 37.67 | a | 41.79 | a | 43.72 | b | 58.43 | b | 69.07 | b | 63.13 | 52.23 | 42.32 | 34.50 | 22.42 | 43.21 | |||||||
1954 | 26.34 | b | 30.78 | a | 36.31 | b | 44.77 | 52.00 | 57.20 | 58.84 | 64.00 | 59.40 | 47.61 | 33.63 | 26.90 | 44.82 | ||||||||||
1955 | 27.06 | 22.46 | 33.81 | 38.80 | 50.39 | 56.50 | 63.23 | 63.45 | 50.67 | 42.74 | 30.53 | 29.77 | 42.45 | |||||||||||||
1956 | 30.03 | 26.55 | 32.29 | 41.47 | 48.77 | 61.50 | 63.52 | 60.61 | 56.10 | 43.61 | 27.43 | 25.29 | 43.10 | |||||||||||||
1957 | 34.00 | 38.22 | a | 38.65 | 41.20 | 48.10 | 61.00 | 66.29 | 67.19 | 54.53 | 48.81 | 31.57 | 28.48 | 46.50 | ||||||||||||
1958 | 26.03 | 34.64 | 36.61 | 41.73 | 54.55 | 64.47 | 65.48 | 67.06 | 60.77 | 50.94 | 34.53 | 26.39 | 46.93 | |||||||||||||
1959 | 26.38 | b | 28.86 | 32.81 | 45.67 | 47.77 | 61.57 | 67.52 | 64.81 | 52.10 | 43.48 | 32.53 | 30.29 | 44.48 | ||||||||||||
1960 | 24.33 | a | 23.79 | 37.29 | 43.17 | 49.90 | 60.83 | 68.42 | 66.87 | 60.57 | 46.32 | 36.30 | 27.26 | 45.42 | ||||||||||||
1961 | 29.83 | a | 30.43 | 36.71 | 41.93 | 48.61 | 61.83 | 66.00 | 65.52 | 57.23 | 44.19 | 36.93 | 32.10 | 45.94 | ||||||||||||
1962 | 28.13 | a | 35.89 | 33.61 | 46.13 | 49.13 | 57.27 | 67.61 | 64.65 | 63.30 | 48.45 | 39.70 | 33.94 | 47.32 | ||||||||||||
1963 | 24.87 | 34.75 | 35.19 | 41.10 | 52.52 | 55.13 | 68.03 | 66.03 | 62.83 | 50.29 | 39.28 | a | 25.97 | 46.33 | ||||||||||||
1964 | 21.00 | 22.55 | 33.87 | 41.97 | 51.32 | 58.77 | 68.45 | 66.26 | 59.83 | 48.61 | 33.90 | 30.32 | 44.74 | |||||||||||||
1965 | 31.45 | 30.29 | 34.97 | 43.37 | 47.45 | 55.30 | 68.42 | 65.32 | 57.48 | a | 45.16 | 40.20 | 35.32 | 46.23 | ||||||||||||
1966 | 27.29 | 29.00 | 35.90 | 44.13 | 53.81 | 59.67 | 69.52 | 66.16 | 60.30 | 44.61 | 38.13 | 27.06 | 46.30 | |||||||||||||
1967 | 22.61 | 30.11 | 37.90 | 40.37 | 48.35 | 59.40 | 68.32 | 64.16 | 58.50 | 43.39 | 36.23 | 26.29 | 44.64 | |||||||||||||
1968 | 27.90 | 37.62 | 38.23 | 42.07 | 49.03 | 59.20 | 66.52 | 63.32 | 56.40 | 44.58 | 35.07 | 24.39 | 45.36 | |||||||||||||
1969 | 32.74 | 30.64 | 32.61 | 43.27 | 51.03 | 58.77 | 69.10 | 68.74 | 60.67 | 45.74 | 36.53 | 32.45 | 46.86 | |||||||||||||
1970 | 25.58 | 33.21 | 35.55 | 37.37 | 49.87 | 62.77 | 69.19 | 67.58 | 58.03 | 42.32 | 32.77 | 28.37 | a | 45.22 | ||||||||||||
1971 | 24.77 | 29.50 | 34.94 | 41.50 | 47.90 | 59.53 | 70.94 | 66.39 | 59.37 | 46.90 | 35.90 | 30.16 | 45.65 | |||||||||||||
1972 | 24.97 | 27.72 | 40.52 | 40.90 | 49.16 | 61.37 | 68.94 | 66.42 | 59.70 | 52.45 | 33.27 | 26.55 | 46.00 | |||||||||||||
1973 | 27.60 | a | 34.00 | 36.65 | 39.37 | 51.26 | 60.20 | 67.52 | 65.58 | 54.73 | 45.00 | 33.03 | 24.87 | 44.98 | ||||||||||||
1974 | 29.16 | 24.82 | 38.06 | 41.73 | 51.16 | 63.87 | 67.42 | 63.87 | 60.00 | 51.55 | 35.57 | 24.97 | 46.02 | |||||||||||||
1975 | 26.52 | 29.00 | 34.86 | b | 37.23 | 46.42 | 55.43 | 68.16 | 66.26 | 59.70 | 46.19 | 32.34 | a | 28.48 | 44.22 | |||||||||||
1976 | 26.45 | 35.55 | 34.81 | 40.77 | 51.16 | 58.80 | 68.48 | 65.29 | 59.40 | 44.97 | 35.33 | 25.58 | 45.55 | |||||||||||||
1977 | 30.29 | 31.93 | 33.00 | 44.33 | 49.58 | 61.33 | 69.52 | 68.03 | 61.10 | 50.94 | 36.00 | 31.10 | 47.26 | |||||||||||||
1978 | 34.13 | 34.82 | 41.32 | 43.00 | 50.23 | 60.63 | 68.55 | 66.03 | 60.77 | 51.77 | a | 41.23 | 29.32 | 48.48 | ||||||||||||
1979 | 32.19 | 31.82 | 36.32 | 41.70 | 52.48 | 60.30 | 65.87 | 62.16 | 60.33 | 45.94 | 31.07 | 28.61 | 45.73 | |||||||||||||
1980 | 32.29 | 36.93 | 37.42 | 43.40 | 49.48 | 59.80 | 69.23 | 65.87 | 59.90 | 45.10 | 34.17 | 31.27 | a | 47.07 | ||||||||||||
1981 | 33.58 | 33.00 | 39.03 | 47.03 | 54.55 | 65.77 | 69.55 | 67.35 | 60.43 | 47.26 | 35.63 | 28.45 | 48.47 | |||||||||||||
1982 | 30.74 | 34.39 | 37.28 | b | 43.34 | a | 51.06 | 55.97 | 67.03 | 67.94 | 61.37 | 43.03 | 37.93 | a | 31.10 | 46.77 | ||||||||||
1983 | 29.37 | a | 34.71 | 39.39 | 39.53 | 49.94 | 57.33 | 66.94 | 68.29 | 65.07 | 52.55 | 38.53 | 30.90 | b | 47.71 | |||||||||||
1984 | 30.03 | b | 27.14 | a | 35.33 | a | 41.77 | 53.94 | 64.13 | 67.90 | 66.45 | 60.67 | 47.00 | 35.17 | 32.76 | b | 46.86 | |||||||||
1985 | 30.55 | 31.31 | b | 38.80 | a | 46.30 | 54.19 | 61.79 | b | 68.16 | 65.29 | 56.77 | 50.16 | 36.53 | 27.87 | 47.31 | ||||||||||
1986 | 29.62 | b | 35.64 | 41.33 | a | 45.71 | b | 52.68 | 63.57 | 66.35 | 68.55 | 55.83 | 45.55 | 38.37 | 31.79 | b | 47.92 | |||||||||
1987 | 26.07 | a | 31.48 | c | 35.26 | 45.70 | 52.84 | 61.27 | 63.16 | 64.77 | 55.73 | 50.07 | a | 33.46 | b | 27.77 | a | 45.63 | ||||||||
1988 | 27.00 | f | 32.25 | e | 34.94 | 44.20 | 51.68 | 63.03 | 69.19 | 67.26 | 55.00 | 51.84 | 34.23 | 28.50 | a | 48.37 | a | |||||||||
1989 | 27.72 | f | 34.80 | c | 40.19 | 46.93 | a | 51.71 | 59.17 | 68.65 | 66.45 | 58.13 | 47.19 | 34.60 | 24.23 | e | 48.37 | a | ||||||||
1990 | 24.12 | e | 30.46 | d | 41.03 | 47.57 | 51.68 | 63.63 | 67.77 | 63.65 | 62.57 | 46.10 | 37.86 | a | 28.29 | c | 47.06 | |||||||||
1991 | 30.04 | f | 34.80 | c | 34.00 | c | 41.57 | 48.13 | 56.00 | 68.26 | 67.35 | 59.10 | 46.71 | 33.96 | b | 34.40 | f | 48.99 | b | |||||||
1992 | 31.15 | e | 36.22 | b | 39.43 | a | 45.67 | 55.20 | a | 57.80 | 64.84 | 64.87 | a | 57.57 | 46.07 | a | 29.39 | b | 31.88 | f | 48.02 | a | ||||
1993 | 37.59 | i | 33.40 | h | 38.50 | a | 43.23 | 53.39 | 59.30 | 66.80 | a | 68.13 | 56.80 | 46.79 | b | 32.08 | e | 26.85 | d | 49.19 | b | |||||
1994 | 24.42 | g | 30.40 | h | 40.47 | a | 44.70 | 51.94 | 66.00 | 67.87 | 68.90 | 60.73 | 45.97 | 34.73 | h | 32.93 | c | 53.28 | c | |||||||
1995 | 31.50 | i | 37.08 | b | 38.83 | b | 40.57 | 50.16 | 58.47 | 64.84 | 69.87 | 60.17 | 45.19 | 37.93 | a | 27.58 | g | 50.31 | b | |||||||
1996 | 26.30 | h | 38.58 | e | 37.07 | c | 45.28 | a | 54.52 | 63.87 | 71.00 | a | 67.42 | 58.60 | 47.47 | a | 36.85 | c | 27.21 | g | 52.07 | b | ||||
1997 | 31.64 | f | 30.26 | i | 38.17 | a | 44.53 | 56.48 | 58.73 | 65.90 | 67.61 | 65.31 | a | 45.21 | b | 36.22 | c | 28.27 | i | 53.13 | c | |||||
1998 | 27.43 | h | 32.48 | g | 37.65 | 41.13 | 50.65 | 57.43 | 70.16 | 67.47 | a | 61.60 | 48.14 | b | 35.19 | c | 28.96 | f | 52.16 | c | ||||||
1999 | 26.81 | e | 28.73 | f | 38.89 | d | 42.43 | b | 51.10 | b | 61.90 | 69.13 | 66.57 | a | 60.64 | b | 46.23 | a | 36.89 | c | 26.52 | j | 50.06 | b | ||
2000 | 27.83 | h | 32.81 | h | 37.57 | c | 46.93 | 56.61 | 66.67 | 69.45 | 66.97 | 60.60 | 50.80 | a | 32.41 | c | 27.88 | e | 51.59 | b | ||||||
2001 | 29.64 | i | 31.00 | h | 37.60 | a | 46.23 | 54.97 | a | 63.00 | 69.32 | 65.84 | 59.24 | a | 48.46 | c | 40.88 | e | 25.75 | g | 53.95 | c | ||||
2002 | 27.00 | e | 31.18 | f | 34.30 | d | 48.14 | a | 52.00 | 64.03 | 68.45 | 65.21 | b | 61.28 | a | 46.79 | c | 37.65 | d | 31.00 | g | 50.48 | b | |||
2003 | 32.72 | f | 33.17 | j | 38.37 | a | 43.86 | a | 54.58 | 62.55 | a | 70.74 | 70.39 | 60.76 | a | 52.57 | a | 37.08 | e | 27.71 | j | 54.54 | c | |||
2004 | 31.43 | j | 27.25 | i | 43.96 | e | 46.83 | a | 55.03 | 61.33 | 66.13 | 64.58 | 58.17 | 48.23 | 38.14 | a | 29.90 | 51.23 | b | |||||||
2005 | 35.27 | a | 39.26 | a | 38.52 | 43.57 | 54.53 | a | 62.73 | 68.32 | 67.19 | 61.03 | 50.94 | 37.63 | 26.87 | 48.82 | ||||||||||
2006 | 26.52 | 32.36 | 37.81 | 47.70 | 56.16 | 67.57 | 70.81 | 67.48 | 58.63 | 51.48 | 37.53 | 27.39 | 48.45 | |||||||||||||
2007 | 28.00 | a | 34.44 | a | 41.06 | 48.20 | 57.71 | 64.67 | 71.26 | 70.06 | 62.80 | 49.77 | 41.67 | 29.23 | a | 49.91 | ||||||||||
2008 | 29.48 | h | 31.55 | 36.94 | 43.30 | 52.65 | 63.17 | 69.13 | 68.03 | 61.77 | 47.42 | 39.17 | 31.32 | 49.49 | a | |||||||||||
2009 | 30.55 | 31.86 | 40.13 | 44.67 | 57.90 | 62.50 | 72.29 | 66.97 | 62.13 | 47.42 | 39.40 | 29.29 | 48.76 | |||||||||||||
2010 | 31.58 | 36.11 | 39.68 | 46.13 | 49.71 | 63.27 | 71.81 | 68.81 | 61.53 | 50.52 | 32.90 | 32.00 | 48.67 | |||||||||||||
2011 | 25.42 | 27.04 | 39.32 | 49.27 | 50.48 | 60.27 | 71.10 | 70.61 | 62.40 | 48.45 | 37.50 | 30.71 | 47.71 | |||||||||||||
2012 | 29.61 | 33.62 | 36.07 | c | 46.23 | 54.90 | 65.87 | 71.19 | 70.29 | 60.53 | 47.07 | a | 38.10 | 30.35 | 48.65 | |||||||||||
2013 | 25.50 | a | 27.43 | 39.03 | 45.50 | 57.23 | 65.27 | 70.90 | 69.16 | 62.70 | 43.55 | 40.03 | 29.19 | 47.96 | ||||||||||||
2014 | 27.06 | 34.82 | 40.39 | 46.23 | 51.13 | 63.90 | 69.35 | 65.32 | 64.10 | 50.74 | 35.13 | 34.61 | 48.57 | |||||||||||||
2015 | 34.10 | 39.00 | 42.00 | 44.70 | 51.00 | 65.87 | 69.77 | 69.00 | 63.72 | a | 52.29 | 35.83 | 28.03 | 49.61 | ||||||||||||
2016 | 29.16 | 33.21 | 39.45 | 45.27 | 52.73 | a | 66.47 | 67.45 | 65.26 | 58.63 | 49.87 | a | 40.80 | 33.74 | 48.50 | |||||||||||
2017 | 32.84 | 36.07 | 40.48 | 44.93 | 52.23 | 64.47 | ----- | z | 65.87 | 58.33 | 48.77 | 41.17 | g | ----- | z | 49.33 | c | |||||||||
2018 | 31.06 | 35.57 | 40.55 | 49.07 | 54.37 | a | 62.76 | a | 71.94 | 69.10 | 63.57 | 52.10 | a | ----- | z | 32.26 | 51.12 | a | ||||||||
2019 | 30.93 | a | 32.59 | a | 39.94 | 47.03 | ----- | z | 61.37 | 70.77 | 69.16 | ----- | z | 44.20 | a | 38.54 | d | 33.41 | b | 46.79 | b | |||||
2020 | 31.52 | 33.76 | 41.39 | 45.90 | a | 56.74 | 62.52 | a | ----- | z | 70.81 | 60.00 | 47.00 | b | 38.63 | 27.10 | 46.85 | a | ||||||||
2021 | 29.19 | 31.39 | 37.65 | 47.93 | 54.26 | ----- | z | 70.90 | 68.87 | 61.33 | ----- | z | 38.80 | 32.75 | c | 47.31 | b | |||||||||
2022 | 29.55 | 28.93 | a | 36.87 | 44.93 | 52.55 | 66.67 | 72.23 | 69.55 | 63.83 | a | 49.10 | 32.31 | a | 32.68 | 48.26 | ||||||||||
2023 | 30.52 | b | 30.79 | 38.74 | 44.43 | 54.87 | a | 59.60 | 71.74 | 69.29 | 60.47 | 49.13 | 40.20 | e | 30.10 | k | 49.98 | a | ||||||||
2024 | 31.48 | j | 34.52 | h | 38.64 | c | 43.24 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.94 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.70 | 32.04 | 37.49 | 43.90 | 51.77 | 61.10 | 68.34 | 66.54 | 59.46 | 47.43 | 35.90 | 29.21 | 46.52 | |||||||||||||
S.D. | 3.05 | 3.94 | 2.55 | 2.63 | 2.92 | 3.30 | 2.35 | 2.29 | 3.05 | 2.86 | 2.97 | 2.79 | 1.74 | |||||||||||||
SKEW | -0.02 | -0.39 | -0.05 | -0.23 | 0.01 | -0.27 | -1.06 | -0.45 | -0.71 | 0.09 | -0.27 | 0.00 | -0.18 | |||||||||||||
MAX | 35.27 | 39.26 | 43.96 | 49.27 | 57.90 | 67.57 | 72.29 | 70.81 | 65.31 | 52.57 | 41.67 | 35.32 | 49.91 | |||||||||||||
MIN | 21.00 | 22.46 | 32.29 | 37.23 | 43.72 | 51.77 | 58.84 | 60.58 | 50.67 | 42.27 | 27.43 | 22.42 | 42.45 | |||||||||||||
YRS | 61 | 65 | 76 | 76 | 74 | 73 | 73 | 76 | 75 | 75 | 72 | 64 | 51 |