YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 40.45 | 32.98 | 34.84 | 36.37 | 45.63 | 57.32 | 59.31 | 59.24 | 56.12 | 49.66 | b | 38.02 | 30.08 | 45.00 | ||||||||||||
1949 | 28.23 | 32.48 | 37.65 | 48.97 | 51.71 | 58.07 | 62.37 | 60.79 | 59.75 | 47.21 | 50.68 | 32.21 | 47.51 | |||||||||||||
1950 | 26.50 | 35.73 | 35.63 | 42.35 | 49.56 | 55.55 | 63.77 | 66.47 | 59.15 | 47.76 | 43.72 | 41.65 | a | 47.32 | ||||||||||||
1951 | 32.10 | 35.88 | 36.55 | 50.40 | 49.21 | 61.65 | 64.48 | 64.13 | 64.37 | 48.24 | 41.65 | 33.10 | 48.48 | |||||||||||||
1952 | 29.82 | 35.67 | 34.06 | 46.87 | 50.82 | 51.48 | 67.66 | 64.82 | 65.00 | 60.06 | 42.97 | 34.45 | 48.64 | |||||||||||||
1953 | 39.23 | 36.73 | 36.40 | a | 42.22 | 43.34 | 49.12 | 63.52 | 60.92 | 63.13 | 50.98 | 42.40 | 38.82 | 47.23 | ||||||||||||
1954 | 33.10 | 42.54 | a | 38.45 | 45.50 | 52.63 | 51.13 | 61.61 | 56.82 | 55.45 | b | 50.73 | 44.90 | 35.97 | 47.40 | |||||||||||
1955 | 32.73 | 32.86 | 35.58 | 35.83 | 47.45 | 56.67 | 58.27 | 64.27 | 58.13 | 50.82 | 38.28 | 35.35 | 45.52 | |||||||||||||
1956 | 33.58 | 31.98 | 36.52 | 45.85 | 52.03 | 53.48 | 65.76 | 61.82 | 60.18 | 46.08 | 47.92 | d | 37.65 | e | 47.74 | |||||||||||
1957 | 29.76 | 40.00 | 38.00 | 45.05 | 51.21 | 58.07 | 60.05 | 59.05 | 63.65 | 45.89 | 41.43 | 38.53 | 47.56 | |||||||||||||
1958 | 38.26 | 39.27 | 35.61 | 42.50 | 56.71 | 57.62 | 68.87 | 68.74 | 56.93 | 55.40 | 42.68 | 43.08 | 50.47 | |||||||||||||
1959 | 35.13 | 33.68 | 37.79 | 45.73 | 46.15 | 55.63 | 65.79 | 61.84 | 52.17 | 50.74 | 46.14 | a | 37.73 | 47.38 | ||||||||||||
1960 | 32.11 | 33.69 | 40.69 | 41.93 | 44.66 | 59.98 | 67.48 | 61.27 | 61.58 | 51.37 | 38.07 | 40.56 | 47.78 | |||||||||||||
1961 | 42.94 | 36.91 | 35.98 | 42.07 | 45.53 | 60.97 | 64.92 | 67.32 | 53.78 | 49.23 | 39.65 | 35.16 | 47.87 | |||||||||||||
1962 | 36.37 | a | 34.19 | b | 35.90 | 46.43 | 43.66 | 55.37 | 64.02 | 60.74 | 61.17 | 51.10 | 41.33 | 42.82 | 47.76 | |||||||||||
1963 | 36.98 | b | 44.54 | 36.55 | 36.17 | 50.24 | 52.70 | 56.82 | 62.47 | 62.33 | 48.00 | 40.22 | 42.02 | a | 47.42 | |||||||||||
1964 | 33.37 | 38.19 | 35.52 | 39.60 | 46.74 | 53.35 | 61.31 | 61.65 | 57.35 | 54.39 | d | 38.02 | 33.37 | 46.07 | ||||||||||||
1965 | 36.74 | 38.62 | 43.08 | 42.52 | 46.92 | 55.10 | 65.47 | 62.27 | 57.67 | 57.50 | 41.13 | 33.08 | 48.34 | |||||||||||||
1966 | 33.53 | 33.66 | 39.23 | 47.60 | 51.05 | 54.80 | 59.76 | 63.61 | 59.88 | 52.18 | 41.80 | 37.00 | 47.84 | |||||||||||||
1967 | 35.19 | 40.36 | 34.56 | 34.63 | 51.15 | 59.50 | 64.98 | 71.42 | 63.07 | 49.34 | 44.10 | 32.77 | 48.42 | |||||||||||||
1968 | 33.61 | 43.98 | 40.16 | 40.95 | 47.32 | 57.13 | 65.50 | 60.74 | 60.75 | 48.73 | 39.40 | 31.06 | 47.45 | |||||||||||||
1969 | 29.40 | 31.07 | 38.83 | a | 40.82 | 55.52 | 57.98 | 61.74 | 61.76 | 59.17 | 46.76 | 47.10 | 38.61 | 47.40 | ||||||||||||
1970 | 36.94 | 42.48 | 39.06 | 37.32 | 50.05 | 60.62 | 66.34 | 66.02 | 56.80 | 49.40 | a | 40.98 | 31.52 | 48.13 | ||||||||||||
1971 | 34.78 | a | 36.20 | 33.94 | 39.72 | 47.84 | 53.47 | 65.50 | 66.34 | 56.13 | 46.92 | 39.50 | 30.06 | 45.87 | ||||||||||||
1972 | 32.32 | 36.93 | 42.90 | 38.25 | 51.87 | 57.45 | 68.06 | 66.18 | 56.75 | 49.29 | 39.78 | 30.24 | 47.50 | |||||||||||||
1973 | 32.55 | 40.09 | 34.97 | 44.80 | 53.76 | 55.75 | 65.00 | 61.60 | 58.18 | 46.89 | 33.70 | 35.37 | 46.89 | |||||||||||||
1974 | 30.61 | 33.21 | 36.32 | 39.45 | 45.85 | 57.50 | 61.29 | 64.37 | 67.65 | 51.35 | a | 39.77 | 33.45 | 46.74 | ||||||||||||
1975 | 36.29 | 34.52 | 34.00 | 36.00 | 51.47 | 55.25 | 64.13 | 60.26 | 66.27 | 45.40 | 37.18 | 38.58 | 46.61 | |||||||||||||
1976 | 40.34 | 35.78 | 35.92 | 40.22 | 49.58 | 53.05 | 64.00 | 59.69 | 60.37 | 55.47 | 49.95 | a | 43.22 | b | 48.97 | |||||||||||
1977 | 40.03 | 43.54 | 34.89 | 47.78 | 44.08 | 60.38 | 62.32 | 69.24 | 54.17 | 49.40 | 37.92 | 37.13 | 48.41 | |||||||||||||
1978 | 37.95 | 38.16 | 44.79 | 39.05 | 46.87 | 57.25 | 63.81 | 61.18 | 52.38 | 56.02 | 38.57 | 32.11 | 47.34 | |||||||||||||
1979 | 35.44 | 34.32 | 43.98 | 42.87 | 51.45 | 57.87 | 63.74 | 60.76 | 62.10 | 52.60 | 42.15 | 40.23 | 48.96 | |||||||||||||
1980 | 36.90 | 41.09 | 36.71 | 43.65 | 47.82 | 50.90 | 63.61 | 60.27 | 60.28 | 54.05 | 43.28 | 43.69 | b | 48.52 | ||||||||||||
1981 | 42.95 | 40.75 | 39.77 | 44.45 | 48.10 | 55.48 | 61.53 | 67.23 | 60.05 | 48.23 | 41.43 | 37.03 | 48.92 | |||||||||||||
1982 | 33.61 | 37.21 | 36.69 | 40.50 | 50.00 | 57.30 | 61.19 | 62.81 | 53.98 | 48.15 | 38.50 | 36.15 | 46.34 | |||||||||||||
1983 | 39.16 | 37.54 | 39.39 | 40.37 | 51.00 | 53.12 | 56.52 | 61.26 | 55.22 | 52.10 | 37.28 | 33.56 | 46.38 | |||||||||||||
1984 | 41.40 | 38.26 | 41.19 | 38.78 | a | 48.85 | 52.87 | 64.08 | 62.85 | 59.15 | 44.53 | 36.33 | 33.06 | 46.78 | ||||||||||||
1985 | 40.87 | 35.73 | 35.98 | 48.50 | 48.58 | 58.67 | 67.55 | 62.65 | 53.73 | 47.84 | 32.65 | 44.18 | 48.08 | |||||||||||||
1986 | 41.23 | 39.80 | 44.35 | 41.57 | 50.13 | 60.50 | 59.23 | 68.48 | 51.87 | 53.19 | 42.52 | 39.97 | 49.40 | |||||||||||||
1987 | 35.68 | 38.71 | 40.13 | 49.95 | 52.79 | 60.98 | 58.77 | 66.18 | 62.92 | 61.15 | 42.23 | 32.66 | 50.18 | |||||||||||||
1988 | 36.66 | 44.12 | 40.76 | 45.32 | 46.90 | 54.87 | 65.73 | 64.74 | 62.00 | 60.18 | 38.22 | 38.44 | 49.83 | |||||||||||||
1989 | 35.13 | 31.54 | 37.10 | 49.48 | a | 49.25 | a | 58.03 | 58.08 | 59.87 | a | 60.65 | 50.37 | a | 45.59 | a | 44.76 | 48.32 | ||||||||
1990 | 35.60 | 35.20 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.40 | f | 40.38 | 30.82 | 35.50 | h | ||||
1991 | 40.29 | 45.68 | 36.15 | 40.67 | 45.39 | 52.47 | 64.65 | 64.65 | 67.27 | 57.35 | 44.53 | 40.65 | 49.98 | |||||||||||||
1992 | 40.32 | 44.41 | 47.35 | 48.18 | 59.98 | 60.33 | 63.85 | 67.63 | 58.80 | 51.97 | 40.78 | ----- | z | 53.06 | a | |||||||||||
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.28 | a | 66.11 | 56.57 | 49.16 | 42.08 | 36.76 | 52.99 | f | |||||
1997 | 36.29 | 37.46 | 40.06 | 42.07 | 55.82 | 53.02 | 61.42 | a | 63.65 | 57.38 | b | 46.68 | 42.23 | 37.02 | 47.76 | |||||||||||
1998 | 36.69 | 34.16 | 38.63 | 43.42 | 43.60 | 55.35 | 66.39 | 65.76 | 62.00 | 48.08 | 37.67 | 33.27 | 47.08 | |||||||||||||
1999 | 38.05 | c | 32.88 | 35.19 | 41.82 | 46.47 | 54.57 | 63.08 | 63.32 | 62.95 | 54.35 | 43.73 | 39.73 | 48.01 | ||||||||||||
2000 | 35.02 | 38.93 | 38.47 | 47.08 | 48.97 | 59.75 | 61.56 | 63.24 | 58.50 | 49.13 | 38.67 | 41.18 | 48.37 | |||||||||||||
2001 | 38.31 | 35.88 | 41.74 | 40.25 | 56.48 | 54.25 | 62.42 | 65.61 | 62.60 | 51.68 | 41.90 | 34.89 | 48.83 | |||||||||||||
2002 | 33.55 | 39.64 | 37.89 | 44.83 | 49.13 | 58.55 | 66.84 | 64.58 | 61.18 | 51.24 | 47.15 | 38.05 | 49.39 | |||||||||||||
2003 | 44.87 | 38.34 | 40.63 | 38.47 | 50.02 | 61.00 | 68.24 | 65.05 | 63.82 | 53.52 | 37.25 | 35.73 | 49.74 | |||||||||||||
2004 | 36.79 | b | 37.33 | 46.27 | 47.75 | 50.58 | 58.07 | 66.87 | 66.65 | 56.50 | 49.55 | 41.45 | 39.97 | 49.81 | ||||||||||||
2005 | 38.66 | 42.16 | 44.00 | 42.25 | 50.66 | 52.73 | 67.21 | 68.08 | 57.55 | 49.37 | 42.90 | 39.55 | 49.59 | |||||||||||||
2006 | 36.26 | 39.30 | 33.82 | 43.40 | 53.35 | 60.15 | 66.71 | 64.05 | 61.67 | 51.08 | 38.80 | 38.26 | 48.90 | |||||||||||||
2007 | 36.61 | 37.82 | 43.48 | 44.35 | 52.77 | 56.50 | 64.68 | 63.08 | 56.62 | 46.98 | 43.80 | 32.76 | 48.29 | |||||||||||||
2008 | 32.15 | 37.83 | 36.21 | 40.00 | 51.84 | 56.70 | 65.60 | 64.97 | 64.15 | 51.60 | 46.02 | 34.55 | 48.47 | |||||||||||||
2009 | 42.53 | 38.04 | 35.90 | 43.22 | 53.69 | 57.37 | 69.02 | 65.16 | 62.32 | 47.26 | 40.72 | 35.73 | 49.25 | |||||||||||||
2010 | 39.58 | 39.66 | 38.47 | 39.68 | 45.16 | 53.72 | 65.63 | 64.26 | 59.47 | 49.71 | 38.43 | 34.65 | 47.37 | |||||||||||||
2011 | 39.58 | 34.02 | 35.10 | 37.13 | 43.81 | 54.30 | 59.27 | 63.97 | 64.73 | 49.94 | 37.50 | 38.73 | 46.51 | |||||||||||||
2012 | 37.82 | 35.69 | 34.53 | 43.27 | 50.32 | 52.43 | 62.23 | 67.19 | 64.20 | 50.58 | 41.65 | 32.67 | e | 47.72 | ||||||||||||
2013 | 36.03 | 35.54 | 41.02 | 44.75 | 51.87 | 57.88 | 67.69 | 64.81 | 56.80 | 50.27 | 43.33 | 38.10 | 49.01 | |||||||||||||
2014 | 44.97 | 38.64 | 41.29 | 45.85 | 52.44 | 56.50 | 68.65 | 66.94 | 62.95 | 53.92 | 43.25 | 38.55 | 51.16 | |||||||||||||
2015 | 46.10 | 44.04 | 46.47 | 43.95 | 52.44 | 64.10 | 68.39 | 66.10 | 58.80 | 56.71 | 38.20 | 33.52 | 51.57 | |||||||||||||
2016 | 35.50 | 42.26 | 39.90 | 49.23 | 52.89 | 59.57 | 61.85 | 67.87 | 58.30 | 46.47 | 42.52 | 31.66 | 49.00 | |||||||||||||
2017 | 32.82 | 36.00 | 39.73 | 40.93 | 52.95 | 58.25 | 66.21 | 70.65 | 60.68 | b | 50.92 | 39.57 | 40.74 | 49.12 | ||||||||||||
2018 | 39.89 | 35.79 | 37.94 | 44.10 | 54.24 | 57.82 | 69.29 | 66.65 | 58.64 | a | 53.21 | 45.45 | 35.92 | 49.91 | ||||||||||||
2019 | 41.26 | 29.14 | 39.69 | 45.83 | 53.02 | 60.02 | 63.40 | 66.81 | 55.70 | 47.89 | 47.47 | 37.61 | 48.99 | |||||||||||||
2020 | 36.50 | 38.40 | 38.07 | b | 47.25 | 51.84 | 55.87 | 65.56 | 66.45 | 66.02 | 56.11 | 41.27 | 38.48 | 50.15 | ||||||||||||
2021 | 37.13 | 34.98 | 37.73 | 48.48 | 52.32 | 63.53 | 69.02 | 66.27 | 61.17 | 46.95 | 44.00 | 34.00 | 49.63 | |||||||||||||
2022 | 41.84 | 41.48 | 41.68 | 39.00 | 46.32 | a | 57.12 | 67.26 | 69.52 | 62.90 | 58.74 | 37.72 | 35.61 | 49.93 | ||||||||||||
2023 | 35.00 | 34.14 | 32.15 | 41.40 | 54.52 | 59.23 | 66.89 | 68.45 | 57.79 | b | 51.77 | 42.97 | ----- | z | 49.48 | a | ||||||||||
2024 | 38.57 | b | 36.93 | h | 38.00 | q | 42.46 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.57 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.64 | 37.50 | 38.45 | 42.92 | 49.98 | 56.69 | 64.18 | 64.33 | 59.71 | 50.93 | 41.40 | 36.61 | 48.24 | |||||||||||||
S.D. | 4.00 | 3.66 | 3.38 | 3.84 | 3.52 | 3.12 | 3.16 | 3.03 | 3.67 | 3.72 | 3.45 | 3.74 | 1.32 | |||||||||||||
SKEW | -0.01 | 0.24 | 0.68 | -0.02 | 0.11 | -0.04 | -0.46 | -0.01 | -0.06 | 0.82 | 0.27 | 0.21 | 0.05 | |||||||||||||
MAX | 46.10 | 45.68 | 47.35 | 50.40 | 59.98 | 64.10 | 69.29 | 71.42 | 67.65 | 61.15 | 50.68 | 44.76 | 51.57 | |||||||||||||
MIN | 26.50 | 29.14 | 32.15 | 34.63 | 43.34 | 49.12 | 56.52 | 56.82 | 51.87 | 44.53 | 32.65 | 30.06 | 45.00 | |||||||||||||
YRS | 73 | 72 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 72 | 73 | 71 | 69 |