YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.62 | q | 27.98 | 27.98 | k | |
1954 | 35.00 | 38.18 | 33.85 | 48.33 | 52.11 | 59.85 | 64.00 | 61.85 | 58.72 | 50.42 | 39.27 | 32.79 | 47.86 | |||||||||||||
1955 | 27.13 | 29.15 | a | 36.87 | a | 40.73 | 49.26 | 56.68 | 61.26 | 61.02 | a | 56.58 | 48.65 | 36.18 | 34.61 | 44.84 | ||||||||||
1956 | 33.35 | a | 26.97 | 38.44 | 41.13 | 54.76 | 63.27 | 62.00 | 60.92 | 58.75 | 48.73 | 33.18 | 32.45 | 46.16 | ||||||||||||
1957 | 27.47 | a | 39.93 | 35.16 | 38.43 | a | 45.03 | 57.85 | 61.84 | 59.02 | 53.28 | 44.66 | 32.57 | 34.18 | 44.12 | |||||||||||
1958 | 29.63 | 32.73 | 28.24 | 37.95 | 51.24 | 60.52 | 63.10 | 60.60 | 53.28 | 43.55 | 36.20 | 34.53 | 44.30 | |||||||||||||
1959 | 31.06 | 29.77 | 34.25 | a | 38.12 | 48.44 | 57.08 | 59.50 | 60.18 | 52.97 | 43.98 | 34.53 | 29.89 | 43.31 | ||||||||||||
1960 | 23.34 | 24.39 | j | 34.37 | a | 42.83 | 47.10 | 56.00 | 56.65 | 57.63 | 52.03 | 40.21 | 33.13 | 21.44 | 42.25 | a | ||||||||||
1961 | 24.10 | 26.77 | 28.82 | 34.55 | 43.26 | 55.97 | 62.06 | 60.13 | 51.58 | 44.94 | 33.25 | 30.44 | 41.32 | |||||||||||||
1962 | 27.23 | 36.11 | 31.63 | a | 45.28 | 52.06 | 57.62 | 61.18 | 62.26 | 55.93 | 49.10 | 40.22 | 32.95 | 45.96 | ||||||||||||
1963 | 25.95 | 32.41 | 34.95 | 42.90 | 50.45 | c | 55.84 | b | 62.60 | 61.34 | 56.33 | 51.72 | a | 40.08 | 31.32 | 45.49 | ||||||||||
1964 | 24.90 | a | 22.20 | a | 31.27 | a | 41.28 | 50.55 | a | 58.52 | 62.06 | 60.27 | 55.13 | 46.76 | 36.88 | 28.94 | 43.23 | |||||||||
1965 | 31.15 | 30.09 | 29.63 | 42.92 | 46.68 | 55.57 | 61.61 | 59.26 | 51.23 | 47.35 | 40.23 | 34.35 | 44.17 | |||||||||||||
1966 | 26.74 | 25.87 | a | 37.18 | 43.18 | 51.68 | 56.67 | 63.69 | 59.21 | 54.63 | 46.05 | 40.58 | 31.15 | a | 44.72 | |||||||||||
1967 | 30.37 | 28.88 | 41.18 | 44.17 | a | 51.05 | 57.10 | 62.16 | 57.06 | 53.15 | 46.60 | 38.20 | 26.08 | 44.67 | ||||||||||||
1968 | 28.79 | 32.41 | 33.85 | 37.25 | b | 48.31 | 58.33 | 60.16 | 58.39 | 53.30 | 47.74 | 34.37 | 27.18 | 43.34 | ||||||||||||
1969 | 32.29 | 29.52 | 28.08 | 42.52 | 50.34 | 56.00 | 62.65 | 61.53 | 54.78 | 42.72 | a | 35.69 | a | 30.78 | d | 43.91 | ||||||||||
1970 | 29.19 | 33.54 | 30.63 | 38.20 | 50.58 | a | 55.32 | 61.26 | 60.66 | 52.55 | 42.05 | 36.31 | d | 35.21 | 43.79 | |||||||||||
1971 | 33.45 | 29.84 | 36.35 | 40.29 | a | 46.70 | a | 58.13 | 60.03 | 55.93 | d | 52.79 | a | 43.28 | a | 36.91 | a | 25.20 | f | 44.88 | a | |||||
1972 | 32.25 | a | 35.82 | a | 41.05 | 44.83 | a | 48.61 | 57.20 | 61.33 | a | 57.34 | 55.10 | 47.38 | a | 29.76 | a | 32.05 | b | 45.23 | ||||||
1973 | 28.48 | 28.65 | a | 32.31 | 33.97 | a | 47.77 | 56.00 | 59.29 | 59.26 | 53.24 | a | 47.08 | 41.68 | b | 32.26 | 43.33 | |||||||||
1974 | 29.47 | b | 29.43 | 37.87 | 39.78 | 53.45 | 58.53 | 60.98 | 55.84 | 52.15 | 46.27 | 36.33 | 25.12 | a | 43.77 | |||||||||||
1975 | 30.25 | a | 30.15 | a | 34.45 | b | 38.72 | a | 46.45 | b | 56.12 | 59.44 | 60.16 | 52.05 | 47.98 | b | 36.16 | b | 32.56 | 43.71 | ||||||
1976 | 31.16 | 37.03 | 36.74 | 42.07 | 48.26 | b | 56.58 | 59.11 | 57.65 | 53.53 | 41.61 | 34.62 | 29.85 | a | 44.02 | |||||||||||
1977 | 27.37 | a | 30.23 | 32.97 | a | 41.35 | 49.69 | 59.68 | 61.89 | 61.68 | a | 56.97 | 48.84 | 39.33 | 35.58 | 45.47 | ||||||||||
1978 | 31.02 | a | 31.23 | 39.06 | 45.78 | a | 48.16 | 59.43 | 63.57 | a | 59.15 | a | 54.52 | 47.71 | 37.32 | 28.22 | a | 45.43 | ||||||||
1979 | 26.02 | 30.70 | 36.37 | 42.20 | 47.98 | b | 57.77 | 62.50 | 59.25 | a | 56.14 | a | 49.70 | a | 31.37 | 34.45 | 44.54 | |||||||||
1980 | 31.90 | 34.82 | a | 34.65 | a | 40.12 | a | 46.89 | 62.59 | a | 65.24 | 60.83 | a | 57.35 | 44.17 | a | 36.27 | 39.03 | 46.15 | |||||||
1981 | 32.21 | b | 34.88 | 33.15 | e | 46.70 | 48.85 | 60.58 | 61.26 | 58.16 | 55.17 | 46.28 | a | 39.41 | a | 34.74 | 45.95 | |||||||||
1982 | 30.26 | 28.80 | a | 36.91 | b | 41.47 | a | 47.35 | a | 55.69 | c | 61.98 | c | 60.95 | b | 54.67 | a | 43.28 | a | 34.96 | d | 28.90 | b | 43.77 | ||
1983 | 31.07 | a | 31.38 | c | 34.29 | 36.41 | c | 46.14 | b | 55.52 | b | 60.21 | 60.89 | 56.80 | 47.20 | a | 38.03 | a | 29.27 | c | 43.93 | |||||
1984 | 28.85 | 32.22 | 33.45 | 37.83 | a | 54.00 | 56.50 | 59.89 | 57.77 | 54.12 | a | 40.38 | a | 36.62 | 33.61 | c | 43.77 | |||||||||
1985 | 26.38 | a | 29.02 | 36.90 | 43.38 | 49.02 | 57.07 | b | 59.84 | 60.23 | 52.60 | 45.98 | 39.03 | 31.29 | 44.23 | |||||||||||
1986 | 36.19 | 34.78 | a | 40.67 | a | 44.30 | 49.34 | 55.75 | b | 59.64 | c | 59.85 | 52.93 | 42.73 | 36.13 | 28.35 | 45.06 | |||||||||
1987 | 27.62 | a | 29.23 | 31.97 | b | 41.85 | 44.82 | 52.50 | 57.24 | 54.44 | 48.12 | a | 44.52 | 31.15 | 24.48 | 40.66 | ||||||||||
1988 | 22.19 | 29.69 | 30.08 | 38.27 | 43.58 | 52.93 | a | 55.29 | 54.52 | 48.03 | 43.79 | 33.17 | 25.16 | 39.73 | ||||||||||||
1989 | 26.45 | b | 26.23 | 37.81 | 43.18 | 49.94 | 53.50 | 58.34 | c | 57.71 | 52.27 | 43.00 | 36.02 | 25.61 | 42.50 | |||||||||||
1990 | 26.85 | 25.64 | 33.40 | 39.63 | 44.67 | a | 59.03 | a | 56.82 | a | 54.95 | 51.98 | 43.40 | a | 35.57 | 26.12 | a | 41.51 | ||||||||
1991 | 25.65 | 30.71 | 31.40 | 39.88 | a | 46.18 | 53.48 | 55.34 | 56.08 | a | 49.88 | 44.60 | 30.91 | a | 26.98 | 40.93 | ||||||||||
1992 | 24.62 | a | 28.41 | 33.23 | 41.72 | 45.71 | 53.47 | 58.08 | 56.31 | 52.25 | 46.55 | 28.80 | 26.00 | 41.26 | ||||||||||||
1993 | 27.09 | b | 27.15 | b | 32.58 | 38.62 | 43.63 | a | 52.98 | a | 57.53 | a | 54.82 | 49.68 | 41.58 | 33.57 | c | 32.16 | 40.95 | |||||||
1994 | 30.27 | a | 30.62 | 36.22 | a | 40.95 | a | 49.55 | c | 61.84 | a | 62.38 | b | 60.76 | b | 54.33 | 43.62 | b | 37.23 | 33.62 | a | 45.12 | ||||
1995 | 31.14 | b | 37.43 | 37.73 | a | 39.38 | a | 47.07 | b | 54.97 | a | 59.48 | 61.33 | a | 54.64 | a | 47.66 | 41.48 | 30.69 | 45.25 | ||||||
1996 | 31.40 | a | 35.30 | a | 35.20 | a | 43.25 | 56.63 | 60.10 | a | 60.97 | 58.60 | a | 52.72 | a | 44.90 | a | 38.12 | 33.61 | c | 45.90 | |||||
1997 | 27.84 | 28.70 | 38.80 | a | 35.81 | a | 49.56 | 55.72 | a | 60.81 | 60.20 | a | 56.32 | b | 45.02 | 34.62 | 27.48 | 43.41 | ||||||||
1998 | 33.02 | 29.62 | 34.39 | 38.17 | 51.34 | 60.09 | b | 61.38 | b | 58.98 | 56.87 | 45.55 | b | 39.65 | 32.97 | 45.17 | ||||||||||
1999 | 34.48 | 37.50 | a | 38.16 | 39.16 | a | 47.84 | 56.37 | 60.47 | a | 59.03 | a | 54.09 | c | 47.15 | 42.26 | a | 29.26 | 45.48 | |||||||
2000 | 34.27 | a | 37.11 | a | 36.32 | a | 44.91 | a | 55.23 | c | 57.68 | b | 61.11 | 60.52 | 57.85 | 44.93 | d | 29.52 | a | 31.35 | a | 45.90 | ||||
2001 | 24.73 | 32.78 | a | 35.55 | b | 44.37 | 51.78 | b | 59.91 | a | 62.42 | 58.73 | 55.52 | 48.42 | a | 37.45 | 30.45 | 45.17 | ||||||||
2002 | 31.45 | 30.46 | 36.13 | 49.05 | b | 51.66 | b | 60.75 | 60.73 | 61.10 | a | 54.00 | 42.93 | b | 36.12 | 28.26 | 45.22 | |||||||||
2003 | 37.03 | 30.90 | c | 36.40 | 42.68 | 52.02 | b | 56.22 | c | 64.68 | 60.95 | 54.12 | 51.03 | 37.47 | 33.37 | a | 46.41 | |||||||||
2004 | 31.16 | 25.29 | a | 40.31 | 40.87 | c | 53.10 | 57.58 | 59.45 | 57.10 | 53.62 | 45.28 | a | 33.80 | 32.05 | 44.13 | ||||||||||
2005 | 35.23 | 32.07 | 33.23 | 42.48 | 50.15 | a | 57.95 | 62.09 | b | 57.77 | a | 56.87 | 45.55 | 39.62 | a | 32.48 | a | 45.46 | ||||||||
2006 | 32.55 | c | 33.84 | 35.76 | 46.18 | b | 52.58 | a | 59.98 | 61.29 | 59.02 | 50.50 | 45.73 | 38.74 | a | 29.84 | 45.50 | |||||||||
2007 | 25.58 | 32.93 | 39.32 | a | 41.48 | 47.72 | a | 57.22 | a | 60.24 | 61.81 | 56.08 | 48.66 | 39.77 | 28.35 | 44.93 | ||||||||||
2008 | 27.02 | c | 33.68 | a | 35.02 | a | 42.13 | 49.96 | c | 60.00 | a | 59.93 | a | 58.97 | a | 52.45 | 46.07 | a | 37.92 | 31.10 | 44.52 | |||||
2009 | 33.77 | 35.29 | 38.47 | a | 40.98 | a | 52.95 | b | 56.02 | c | 62.52 | 61.05 | a | 52.13 | 43.05 | 39.70 | 25.95 | 45.16 | ||||||||
2010 | 29.90 | 25.66 | 33.42 | 42.40 | 49.90 | 60.33 | 61.03 | 60.60 | 57.97 | 47.28 | a | 35.65 | 36.53 | 45.06 | ||||||||||||
2011 | 30.32 | 27.96 | a | 42.02 | 45.73 | 49.55 | 62.40 | 64.05 | a | 63.15 | a | 54.03 | a | 46.08 | 38.22 | 25.45 | b | 45.75 | ||||||||
2012 | 34.10 | a | 29.34 | ----- | z | 44.69 | a | 52.02 | 62.09 | a | 61.34 | 60.79 | 55.29 | a | 48.98 | ----- | z | ----- | z | 49.85 | c | |||||
2013 | 27.19 | ----- | z | ----- | z | 42.38 | 49.39 | ----- | z | 60.05 | 60.44 | 55.40 | 43.89 | 35.88 | 30.18 | 44.98 | c | |||||||||
2014 | 32.92 | 36.21 | 37.95 | 42.22 | 48.35 | 59.27 | 60.92 | a | 58.34 | 56.30 | 48.72 | a | 36.74 | a | 31.34 | 45.77 | ||||||||||
2015 | 32.53 | 32.94 | a | 39.52 | b | 42.47 | a | 46.03 | 58.20 | 60.65 | 60.55 | 58.80 | 48.00 | 37.18 | 32.13 | 45.75 | ||||||||||
2016 | 27.79 | 34.41 | 39.58 | 41.98 | 47.73 | 60.10 | 63.77 | c | 57.60 | 54.92 | 51.97 | 38.88 | b | 33.48 | a | 46.02 | ||||||||||
2017 | 30.72 | b | 38.44 | a | 42.23 | 42.80 | 47.87 | 60.33 | 61.98 | 58.71 | 55.10 | 47.81 | 44.60 | 36.15 | 47.23 | |||||||||||
2018 | 34.89 | 34.93 | 38.74 | 45.57 | 53.94 | 62.83 | 63.17 | a | 60.50 | 55.52 | 44.55 | a | 35.17 | a | 30.52 | 46.69 | ||||||||||
2019 | 30.69 | b | 32.18 | 38.29 | 44.67 | d | 46.67 | a | 56.88 | d | 63.73 | a | 64.27 | 60.13 | 45.20 | a | 39.13 | 33.87 | 46.31 | |||||||
2020 | 32.32 | 33.27 | a | 40.68 | 44.27 | q | 54.58 | 60.93 | 64.56 | 64.98 | 55.26 | a | 51.54 | d | 40.93 | a | 31.45 | 48.23 | a | |||||||
2021 | 30.55 | 33.07 | 36.65 | 43.13 | 50.60 | p | 60.82 | 62.14 | t | ----- | z | ----- | z | 48.00 | 43.92 | 38.42 | 41.82 | d | ||||||||
2022 | 32.73 | c | 29.04 | 34.62 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.88 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.89 | 31.52 | 35.64 | 41.67 | 49.33 | 57.85 | 61.01 | 59.42 | 54.29 | 46.03 | 36.77 | 30.87 | 44.49 | |||||||||||||
S.D. | 3.32 | 3.68 | 3.39 | 3.05 | 2.97 | 2.58 | 2.11 | 2.19 | 2.46 | 2.69 | 3.31 | 3.51 | 1.66 | |||||||||||||
SKEW | -0.12 | 0.08 | -0.19 | -0.17 | 0.16 | 0.06 | -0.58 | -0.26 | -0.15 | 0.10 | -0.20 | -0.20 | -0.87 | |||||||||||||
MAX | 37.03 | 39.93 | 42.23 | 49.05 | 56.63 | 63.27 | 65.24 | 64.98 | 60.13 | 51.97 | 44.60 | 39.03 | 47.86 | |||||||||||||
MIN | 22.19 | 22.20 | 28.08 | 33.97 | 43.26 | 52.50 | 55.29 | 54.44 | 48.03 | 40.21 | 28.80 | 21.44 | 39.73 | |||||||||||||
YRS | 69 | 67 | 66 | 67 | 67 | 67 | 67 | 67 | 67 | 68 | 67 | 67 | 62 |