YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.21 | b | 52.13 | 46.34 | a | 42.07 | a | 37.17 | 32.93 | b | 43.31 | f | ||
1949 | 25.17 | a | 34.15 | a | 38.61 | 40.14 | a | 45.34 | b | 45.33 | c | 47.58 | 49.60 | a | 48.10 | a | 37.48 | 42.40 | 37.03 | a | 40.91 | |||||
1950 | 27.90 | 35.89 | a | 37.23 | 39.33 | 39.85 | e | 50.52 | a | 49.83 | a | 51.32 | 47.00 | 44.19 | 42.20 | 45.26 | 42.54 | |||||||||
1951 | 35.33 | a | 33.18 | 27.62 | j | 39.03 | 43.23 | a | 45.97 | 49.65 | 47.48 | 47.53 | 44.77 | 40.47 | 33.87 | 41.87 | a | |||||||||
1952 | 33.39 | 35.76 | 36.37 | a | 37.31 | a | 42.27 | a | 47.07 | a | 50.58 | 52.23 | 45.76 | a | 43.84 | 33.08 | d | 37.55 | 41.27 | |||||||
1953 | 39.40 | k | 35.46 | b | 37.48 | b | 38.86 | b | 42.94 | ----- | z | 49.33 | a | 52.35 | 48.21 | b | 43.50 | a | 42.70 | 38.77 | 42.96 | b | ||||
1954 | 34.41 | d | 37.64 | 32.45 | 37.60 | 42.65 | 46.20 | o | 47.90 | a | 51.23 | 48.14 | a | 40.94 | 44.41 | a | 37.97 | a | 41.39 | a | ||||||
1955 | 34.81 | 34.19 | a | 34.16 | 36.27 | 41.68 | c | 50.38 | n | 51.48 | 46.03 | 45.07 | 45.29 | 38.59 | a | 36.10 | 40.33 | a | ||||||||
1956 | 37.17 | a | 32.93 | 36.10 | a | 38.48 | a | 42.97 | 46.50 | 48.47 | a | 51.53 | a | 47.80 | 43.35 | 35.03 | 36.03 | 41.36 | ||||||||
1957 | 29.77 | 35.75 | 39.10 | 40.47 | 45.16 | 47.00 | a | 46.90 | 46.06 | 47.47 | 42.17 | a | 34.70 | 38.03 | a | 41.05 | ||||||||||
1958 | 40.29 | 42.57 | 32.97 | 40.10 | 45.19 | 52.70 | 52.23 | 46.94 | 46.53 | 41.84 | 39.00 | 41.94 | 43.52 | |||||||||||||
1959 | 39.26 | 36.57 | 37.06 | 38.59 | a | 42.00 | 48.83 | 47.77 | 45.94 | 47.23 | 44.19 | 37.27 | 34.77 | 41.62 | ||||||||||||
1960 | 34.32 | 35.97 | 37.61 | 40.07 | 42.26 | 45.27 | 44.06 | 50.10 | 45.13 | 43.50 | a | 39.13 | 35.74 | 41.10 | ||||||||||||
1961 | 40.84 | 40.86 | 38.32 | 38.23 | 43.45 | 46.50 | 50.81 | 50.13 | 42.70 | 40.90 | 34.30 | 37.26 | 42.03 | |||||||||||||
1962 | 32.58 | 36.43 | 34.81 | 39.73 | 42.35 | 44.27 | 47.39 | 49.45 | 47.87 | 44.42 | 41.20 | 36.42 | 41.41 | |||||||||||||
1963 | 29.23 | 43.11 | 35.26 | 39.67 | 41.19 | 46.37 | 48.32 | 50.45 | 48.90 | 45.65 | 41.63 | 38.74 | 42.38 | |||||||||||||
1964 | 38.45 | 32.00 | 36.13 | 36.63 | 40.26 | 46.53 | 49.23 | 49.19 | 46.20 | 42.84 | 36.20 | 36.13 | 40.82 | |||||||||||||
1965 | 36.97 | 36.93 | 34.13 | 39.43 | 40.23 | 43.70 | 50.07 | a | 52.03 | 44.70 | 45.23 | a | 42.53 | 32.68 | c | 41.55 | ||||||||||
1966 | 36.35 | 36.32 | 33.03 | 38.73 | 40.06 | 45.80 | 48.16 | 46.45 | 48.43 | 41.26 | 40.93 | 42.03 | 41.46 | |||||||||||||
1967 | 40.03 | 35.89 | 36.35 | 34.07 | 42.90 | 51.10 | 48.61 | 51.16 | 49.80 | 45.48 | 40.20 | 37.13 | 42.73 | |||||||||||||
1968 | 35.58 | 39.43 | a | 40.29 | 36.70 | 43.97 | 46.00 | 49.35 | 49.23 | 48.03 | 41.61 | 41.30 | 35.45 | 42.25 | ||||||||||||
1969 | 31.23 | 33.93 | 34.13 | 39.17 | 42.80 | a | 53.27 | 48.61 | 46.84 | 47.70 | 40.94 | 36.97 | 37.35 | 41.08 | ||||||||||||
1970 | 37.19 | 37.21 | 34.77 | 36.90 | 40.45 | 47.07 | 46.16 | 46.87 | 42.17 | 40.29 | 39.70 | 33.35 | 40.18 | |||||||||||||
1971 | 35.29 | 35.00 | 34.16 | 37.70 | 42.55 | 45.53 | 49.94 | 51.35 | 43.70 | 38.81 | 37.40 | 35.37 | a | 40.57 | ||||||||||||
1972 | 33.68 | 37.17 | 39.74 | 35.83 | 43.84 | 46.87 | 48.32 | 46.48 | 42.60 | 38.94 | 41.87 | 33.71 | 40.75 | |||||||||||||
1973 | 34.65 | 36.00 | 36.42 | 37.93 | 42.00 | 47.97 | 48.58 | 46.58 | 46.17 | 42.42 | 37.97 | 40.39 | 41.42 | |||||||||||||
1974 | 33.97 | 35.79 | 37.35 | 40.33 | 41.77 | 42.33 | 48.23 | 50.90 | 46.37 | 37.00 | 40.27 | 38.94 | 41.10 | |||||||||||||
1975 | 37.65 | 35.68 | 35.19 | 34.27 | 42.03 | 45.60 | 49.94 | 48.19 | 43.47 | 44.03 | 38.03 | 38.48 | 41.05 | |||||||||||||
1976 | 35.71 | 34.57 | a | 33.94 | 36.93 | 41.48 | 43.67 | 48.29 | 50.29 | 48.37 | 42.16 | 36.87 | 34.00 | 40.52 | ||||||||||||
1977 | 32.19 | 37.25 | 36.61 | 37.97 | 41.10 | 47.45 | a | 47.52 | 52.61 | 48.20 | 40.29 | 38.33 | 41.68 | 41.77 | ||||||||||||
1978 | 39.84 | 40.36 | 38.06 | 40.80 | 42.55 | 49.47 | 50.81 | 51.71 | 49.73 | 42.55 | 31.93 | 30.58 | 42.37 | |||||||||||||
1979 | 30.19 | 36.79 | 39.29 | 40.63 | ----- | z | 43.17 | 50.90 | 50.87 | 48.97 | a | 45.42 | 36.50 | 40.39 | 42.10 | a | ||||||||||
1980 | 31.42 | 38.29 | a | 37.13 | 38.57 | 42.90 | 46.43 | 50.23 | 49.10 | 47.47 | 39.80 | a | 39.83 | 39.52 | 41.72 | |||||||||||
1981 | 37.39 | 36.79 | 37.13 | a | 40.43 | 43.71 | 48.80 | 52.16 | 50.97 | 47.60 | 41.68 | 39.17 | 38.42 | 42.85 | ||||||||||||
1982 | 35.03 | 37.25 | 35.97 | 36.03 | 40.61 | 48.73 | 50.00 | 50.61 | 47.70 | 45.32 | 37.50 | 36.81 | 41.80 | |||||||||||||
1983 | 41.10 | a | 42.46 | 41.90 | a | 37.93 | 45.55 | 49.23 | 53.23 | 51.13 | 45.80 | 39.39 | 43.37 | 32.83 | a | 43.66 | ||||||||||
1984 | 36.97 | 40.72 | 40.42 | 38.60 | 42.74 | 46.13 | 45.55 | 46.97 | 47.90 | 42.87 | 41.41 | a | 33.71 | 42.00 | ||||||||||||
1985 | 30.80 | a | 32.25 | 33.00 | 40.40 | 42.87 | 44.67 | 49.10 | 48.45 | 46.00 | 42.06 | 33.33 | 28.77 | 39.31 | ||||||||||||
1986 | 39.29 | 37.75 | 40.10 | 37.37 | 43.81 | 48.03 | 49.77 | 50.97 | 46.07 | 44.68 | 40.50 | 37.10 | 42.95 | |||||||||||||
1987 | 36.74 | 38.32 | 39.32 | 39.30 | 44.35 | 45.73 | 50.19 | 48.16 | 46.07 | 39.55 | 40.73 | 33.68 | 41.85 | |||||||||||||
1988 | 35.94 | 35.83 | 35.77 | 40.23 | 42.90 | 44.13 | 47.16 | 45.81 | 42.17 | 46.81 | 41.80 | 36.35 | 41.24 | |||||||||||||
1989 | 36.39 | 30.57 | 38.45 | 41.53 | 42.13 | 48.03 | 49.23 | 50.77 | 43.17 | 41.13 | 39.80 | 34.68 | 41.32 | |||||||||||||
1990 | 37.45 | 34.89 | 37.61 | 42.23 | 43.77 | 48.83 | 49.81 | 52.03 | 49.17 | 41.03 | 40.77 | 30.65 | 42.35 | |||||||||||||
1991 | 33.68 | 41.19 | a | 34.61 | 38.63 | 43.42 | 46.23 | 48.68 | 51.03 | 43.93 | 38.61 | 41.37 | 37.97 | 41.61 | ||||||||||||
1992 | 38.10 | 39.14 | 37.35 | 41.90 | 40.84 | 47.30 | 52.71 | 49.87 | 46.53 | 44.03 | a | 41.40 | 36.00 | 42.93 | ||||||||||||
1993 | 33.68 | 34.25 | 40.68 | 43.57 | 48.65 | 49.17 | 53.60 | a | 50.71 | 46.27 | 44.00 | 31.97 | 35.19 | 42.64 | ||||||||||||
1994 | 37.48 | 34.71 | 38.29 | 42.00 | 43.26 | 46.10 | 48.55 | 50.61 | 49.27 | 38.94 | 35.43 | 37.61 | 41.85 | |||||||||||||
1995 | 42.13 | 39.64 | 38.16 | 38.63 | 44.42 | 47.73 | 52.03 | 49.16 | 53.93 | 43.03 | 45.57 | 41.35 | 44.65 | |||||||||||||
1996 | 38.65 | 37.50 | c | 39.10 | 43.73 | 42.94 | 46.63 | 49.84 | 48.16 | 45.77 | 41.97 | 38.77 | 38.53 | a | 42.63 | |||||||||||
1997 | 38.26 | 36.26 | a | 39.06 | 40.77 | 46.81 | 49.13 | 49.90 | 51.61 | 49.83 | 44.00 | 43.73 | 35.81 | 43.76 | ||||||||||||
1998 | 40.90 | 40.00 | 38.77 | 37.57 | 46.39 | 50.03 | 54.23 | 49.10 | 45.57 | 42.16 | 42.62 | a | 36.00 | a | 43.61 | |||||||||||
1999 | 37.68 | 39.11 | 36.81 | 37.63 | 41.06 | 48.80 | 49.26 | 52.10 | 41.37 | 39.19 | 43.10 | 40.23 | 42.19 | |||||||||||||
2000 | 35.71 | 38.52 | 33.84 | 39.03 | 44.68 | 46.83 | 49.58 | 47.26 | 47.47 | 42.61 | 33.97 | 37.26 | 41.40 | |||||||||||||
2001 | 35.39 | 31.43 | 37.32 | 36.77 | 42.45 | 46.33 | 47.77 | 52.42 | 44.53 | 39.84 | 40.31 | a | 38.47 | a | 41.09 | |||||||||||
2002 | 38.16 | 36.18 | 35.55 | 38.40 | 40.10 | 47.67 | 49.13 | 47.61 | 43.27 | 40.97 | 38.47 | 39.71 | 41.27 | |||||||||||||
2003 | 41.42 | 33.11 | 43.10 | 39.80 | 41.71 | 47.83 | 48.97 | 48.65 | 47.40 | 48.39 | 37.79 | a | 38.29 | 43.04 | ||||||||||||
2004 | 38.87 | 38.33 | b | 38.55 | 39.30 | 44.48 | 49.27 | 52.23 | 53.77 | 47.67 | 44.43 | a | 36.67 | 37.74 | 43.44 | |||||||||||
2005 | 38.71 | 34.32 | 37.23 | 40.90 | 48.13 | 48.70 | 49.65 | 48.58 | 41.37 | 45.42 | 34.50 | 36.00 | 41.96 | |||||||||||||
2006 | 40.97 | 34.75 | 35.29 | 38.87 | ----- | z | 47.80 | 49.42 | 47.32 | 45.43 | 38.55 | 42.00 | b | 36.03 | 41.49 | a | ||||||||||
2007 | 31.62 | b | 38.19 | a | 49.42 | 50.53 | m | 42.14 | i | 48.00 | 53.35 | 50.32 | 45.80 | 42.94 | 36.87 | 36.17 | a | 43.27 | b | |||||||
2008 | 33.87 | 35.79 | 36.19 | 35.63 | 44.94 | 44.73 | 48.61 | 51.97 | 44.70 | 41.61 | 43.23 | 33.61 | 41.24 | |||||||||||||
2009 | 33.77 | 32.79 | 36.39 | 39.17 | 42.48 | 49.87 | 51.32 | 51.63 | a | 49.00 | 45.29 | 40.24 | a | 31.11 | c | 41.92 | ||||||||||
2010 | 43.84 | 40.00 | a | 37.74 | 40.24 | a | 43.45 | 46.84 | e | 49.03 | 50.23 | 51.91 | g | 47.64 | t | ----- | z | ----- | z | 43.92 | d | |||||
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | 40.57 | a | 46.60 | 52.03 | 50.13 | 43.45 | a | 42.00 | 41.13 | 37.45 | 44.17 | d | ||||||
2013 | 32.16 | 37.11 | 37.28 | b | 39.90 | 44.48 | 49.67 | 49.00 | 51.90 | b | 51.90 | 38.68 | 38.33 | 29.32 | 41.64 | |||||||||||
2014 | 35.40 | a | 36.59 | a | 39.45 | 40.13 | 46.04 | d | 47.90 | a | 51.70 | a | 52.29 | 50.57 | 49.23 | 40.67 | 40.61 | 44.21 | ||||||||
2015 | 37.87 | 41.54 | 38.32 | 37.20 | 45.77 | a | 47.10 | 51.77 | 50.57 | a | 46.27 | 46.77 | 36.37 | 38.71 | 43.19 | |||||||||||
2016 | 39.97 | 41.64 | a | 40.68 | 41.97 | 45.77 | 49.13 | 52.74 | 51.52 | 46.13 | 46.77 | 45.67 | 31.87 | 44.49 | ||||||||||||
2017 | 31.84 | 35.75 | 40.53 | a | 40.33 | 44.61 | 50.03 | 48.06 | 51.03 | 48.03 | 41.00 | 41.20 | 36.29 | c | 42.39 | |||||||||||
2018 | 42.00 | d | 33.79 | 33.83 | b | 40.93 | 46.77 | 48.73 | 50.97 | a | 54.07 | a | 44.45 | a | 45.89 | c | 38.87 | 38.62 | b | 43.24 | ||||||
2019 | 35.77 | a | 30.96 | 33.23 | a | 41.68 | b | 45.06 | 46.24 | a | 52.38 | b | 51.50 | c | 50.26 | c | 39.13 | h | 36.93 | 36.00 | h | 42.40 | b | |||
2020 | 40.60 | f | 34.93 | n | ----- | z | ----- | z | 46.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.13 | k | |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | 42.63 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.63 | k |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.03 | 36.64 | 37.22 | 39.05 | 43.25 | 47.33 | 49.68 | 49.91 | 46.62 | 42.58 | 39.22 | 36.59 | 42.00 | |||||||||||||
S.D. | 3.69 | 2.86 | 2.78 | 1.97 | 1.98 | 2.10 | 1.94 | 2.08 | 2.46 | 2.62 | 3.15 | 3.13 | 1.08 | |||||||||||||
SKEW | -0.40 | 0.20 | 1.18 | -0.12 | 0.47 | 0.23 | 0.05 | -0.41 | 0.03 | 0.12 | -0.32 | -0.16 | 0.38 | |||||||||||||
MAX | 43.84 | 43.11 | 49.42 | 43.73 | 48.65 | 53.27 | 54.23 | 54.07 | 53.93 | 49.23 | 45.67 | 45.26 | 44.65 | |||||||||||||
MIN | 25.17 | 30.57 | 32.45 | 34.07 | 39.85 | 42.33 | 44.06 | 45.81 | 41.37 | 37.00 | 31.93 | 28.77 | 39.31 | |||||||||||||
YRS | 68 | 69 | 68 | 68 | 69 | 67 | 71 | 71 | 70 | 69 | 70 | 69 | 60 |