YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 25.90 | 26.73 | a | 30.05 | a | 54.12 | 57.95 | 66.08 | 72.77 | 71.66 | 67.18 | 52.10 | 34.95 | 34.06 | 49.46 | |||||||||||
1949 | 21.55 | a | 32.23 | 40.65 | 48.84 | a | 58.31 | 64.98 | 72.68 | 71.40 | 65.27 | 52.11 | 47.30 | 33.18 | 50.71 | |||||||||||
1950 | 34.82 | 38.55 | 40.22 | a | 49.82 | 56.81 | 68.32 | 69.18 | 68.50 | 62.23 | 61.65 | 41.93 | a | 37.58 | a | 52.47 | ||||||||||
1951 | 28.50 | 37.11 | 37.63 | 46.17 | 59.23 | a | 64.68 | 75.40 | 73.32 | 63.88 | 51.82 | 38.12 | 31.82 | 50.64 | ||||||||||||
1952 | 37.02 | 34.55 | 36.47 | 48.95 | 58.55 | 74.17 | 74.97 | a | 73.27 | 66.00 | 54.00 | 33.22 | 31.76 | 51.91 | ||||||||||||
1953 | 37.85 | 34.18 | 44.05 | 46.47 | 55.68 | 72.60 | 75.63 | 71.87 | 67.37 | 54.21 | 43.20 | 30.29 | 52.78 | |||||||||||||
1954 | 37.13 | 42.52 | 38.02 | 55.50 | 58.74 | 72.00 | 76.69 | 72.66 | 68.50 | 54.69 | 44.45 | 33.98 | 54.57 | |||||||||||||
1955 | 32.52 | 28.35 | a | 38.87 | 49.55 | 57.69 | 65.18 | 74.29 | 71.98 | 65.88 | 55.02 | 38.08 | 37.69 | 51.26 | ||||||||||||
1956 | 35.58 | 29.30 | a | 40.84 | 48.65 | 63.18 | 74.23 | 73.39 | 70.63 | 68.37 | 56.98 | 36.78 | 36.19 | 52.84 | ||||||||||||
1957 | 32.12 | a | 43.12 | 39.87 | 44.28 | 54.87 | 66.18 | 73.45 | 72.23 | 63.59 | a | 53.73 | 35.15 | 38.32 | 51.41 | |||||||||||
1958 | 31.97 | 37.98 | 34.31 | 45.83 | 62.71 | 70.84 | a | 72.34 | 73.06 | 67.02 | a | 54.24 | 41.70 | 35.21 | 52.27 | |||||||||||
1959 | 25.58 | 34.20 | 38.58 | 48.60 | 59.60 | 69.83 | 72.76 | 73.19 | 64.17 | 50.16 | 39.09 | a | 35.48 | 50.94 | ||||||||||||
1960 | 25.42 | 21.10 | 38.77 | 52.03 | 58.52 | 69.85 | 72.29 | 73.97 | 65.73 | 52.68 | 43.10 | 31.61 | 50.42 | |||||||||||||
1961 | 33.02 | 33.70 | 40.66 | 47.23 | 59.37 | a | 68.20 | 72.13 | 71.92 | 60.83 | a | 52.79 | 37.55 | 28.69 | 50.51 | |||||||||||
1962 | 24.97 | 37.96 | a | 37.08 | 53.00 | 61.65 | 66.37 | 71.63 | 72.77 | 63.87 | 56.13 | 43.83 | 36.40 | 52.14 | ||||||||||||
1963 | 23.13 | a | 36.52 | 41.79 | 53.98 | 63.00 | a | 71.08 | 76.69 | 71.08 | 67.62 | 59.52 | 44.60 | 30.81 | 53.32 | |||||||||||
1964 | 30.60 | 24.66 | 36.27 | 47.00 | 60.87 | 68.07 | 76.39 | 71.73 | 63.70 | 54.47 | 40.70 | 34.75 | a | 50.77 | ||||||||||||
1965 | 36.42 | 30.55 | 30.79 | 51.37 | 58.55 | 66.22 | 73.53 | 69.87 | 60.17 | 55.16 | 47.48 | 38.29 | 51.53 | |||||||||||||
1966 | 25.55 | 29.70 | 44.06 | 48.88 | 62.00 | 69.50 | 76.56 | 70.40 | 65.47 | a | 52.79 | 45.02 | 31.57 | a | 51.79 | |||||||||||
1967 | 35.10 | 36.00 | 46.23 | 52.90 | 55.69 | 66.20 | 73.23 | 68.85 | a | 62.45 | 54.07 | a | 43.02 | 27.18 | 51.74 | |||||||||||
1968 | 34.25 | a | 36.79 | 41.37 | 46.40 | 56.06 | 70.03 | 71.48 | 68.74 | 63.15 | 55.56 | 38.83 | 31.34 | 51.17 | ||||||||||||
1969 | 38.18 | 36.21 | 32.21 | 52.03 | 60.47 | 63.40 | 74.60 | 74.08 | 65.78 | 45.94 | 40.47 | 33.66 | 51.42 | |||||||||||||
1970 | 29.98 | 39.68 | 35.21 | 46.18 | 60.61 | 67.32 | 73.98 | 74.39 | 63.24 | a | 47.35 | 41.23 | 37.60 | 51.40 | ||||||||||||
1971 | 34.77 | a | 32.64 | 41.98 | 48.71 | a | 56.08 | 70.88 | 71.79 | 70.56 | 60.29 | a | 51.79 | 42.38 | 33.19 | 51.26 | ||||||||||
1972 | 32.69 | 39.28 | 47.13 | a | 51.93 | 58.58 | 70.23 | 72.02 | 70.98 | 65.68 | 53.82 | a | 31.90 | 29.10 | 51.95 | |||||||||||
1973 | 30.31 | 35.11 | 39.24 | 42.62 | 56.37 | 67.83 | 72.05 | a | 72.32 | 61.78 | 55.15 | 44.12 | a | 30.13 | 50.59 | |||||||||||
1974 | 27.94 | 35.43 | 45.93 | a | 49.85 | 63.68 | 69.37 | 75.02 | 69.89 | 60.50 | 55.06 | 40.20 | 28.77 | 51.80 | ||||||||||||
1975 | 31.06 | 32.89 | 39.34 | 48.34 | a | 57.18 | 67.15 | 73.68 | 73.60 | 62.24 | a | 56.24 | 37.95 | 37.29 | 51.41 | |||||||||||
1976 | 31.69 | 41.16 | 40.79 | 51.80 | 58.13 | 68.68 | 74.53 | 72.05 | 62.82 | 48.95 | 38.43 | 31.69 | 51.73 | |||||||||||||
1977 | 30.26 | 36.29 | 40.44 | 51.15 | 62.13 | 71.36 | a | 74.60 | 71.85 | 66.37 | 54.89 | 43.37 | 38.11 | 53.40 | ||||||||||||
1978 | 27.82 | 31.95 | 44.50 | 53.18 | 56.73 | 69.22 | 76.05 | 70.84 | 66.43 | 54.95 | 40.75 | 28.31 | 51.73 | |||||||||||||
1979 | 22.24 | 36.75 | 41.69 | 51.62 | 56.08 | 66.93 | 73.45 | 69.63 | 66.05 | 55.37 | 35.73 | 36.68 | 51.02 | |||||||||||||
1980 | 31.18 | 37.47 | 40.10 | 46.40 | 56.69 | 72.37 | 77.23 | 74.40 | 66.15 | 51.47 | 42.12 | 41.81 | 53.11 | |||||||||||||
1981 | 35.95 | 39.07 | a | 41.84 | 57.00 | 58.26 | 72.10 | 73.76 | 69.37 | 65.68 | 54.69 | 46.38 | 36.84 | 54.25 | ||||||||||||
1982 | 34.47 | 32.48 | 43.79 | 50.07 | 58.08 | 65.73 | 74.48 | 73.00 | 65.23 | 52.44 | 40.88 | 33.58 | 52.02 | |||||||||||||
1983 | 33.56 | 36.52 | 40.89 | 43.77 | 54.44 | 65.78 | 75.27 | 74.92 | 68.25 | 55.37 | 41.00 | 20.77 | 50.88 | |||||||||||||
1984 | 28.45 | 35.29 | 37.60 | 46.73 | 62.26 | 68.07 | 74.50 | 72.37 | 63.18 | 48.34 | 42.52 | 36.05 | 51.28 | |||||||||||||
1985 | 25.15 | 31.36 | 43.66 | 52.62 | 60.55 | 69.17 | 73.87 | 73.68 | 61.78 | 52.68 | 39.57 | a | 31.03 | 51.26 | ||||||||||||
1986 | 40.63 | 37.48 | 47.65 | 52.55 | 59.13 | 67.95 | 72.94 | 71.16 | 63.32 | 51.16 | 40.73 | 31.85 | 53.05 | |||||||||||||
1987 | 32.48 | 37.02 | 39.71 | 51.52 | 58.16 | 69.02 | 74.77 | 69.55 | 62.97 | 54.16 | 40.38 | 30.68 | 51.70 | |||||||||||||
1988 | 25.58 | 35.50 | 38.84 | 50.08 | 58.16 | 70.15 | 72.63 | 72.37 | 63.38 | 56.08 | 41.72 | 33.32 | 51.48 | |||||||||||||
1989 | 34.73 | 28.00 | 47.40 | 52.68 | 61.08 | 66.07 | 75.13 | 71.08 | 63.90 | 53.08 | 43.91 | a | 27.58 | 52.05 | ||||||||||||
1990 | 33.19 | 33.52 | 42.79 | 50.78 | 56.71 | 73.52 | 70.66 | 70.35 | 66.65 | 53.84 | 43.17 | 27.26 | 51.87 | |||||||||||||
1991 | 31.00 | 39.80 | 41.87 | 49.33 | 61.23 | 69.72 | 71.77 | 71.11 | 62.78 | 52.77 | 35.03 | 32.42 | 51.57 | |||||||||||||
1992 | 34.21 | 38.14 | 44.03 | 55.47 | 59.37 | 65.98 | 71.15 | 69.69 | 65.58 | 54.39 | 31.73 | 28.08 | 51.49 | |||||||||||||
1993 | 31.56 | 32.38 | 42.18 | 49.18 | 59.02 | a | 67.72 | 73.05 | 69.42 | a | 60.90 | 49.87 | 36.23 | 33.42 | 50.41 | |||||||||||
1994 | 32.73 | 34.77 | 43.16 | 48.70 | 60.21 | 72.88 | 72.81 | 73.34 | 65.10 | 52.60 | 40.25 | 37.35 | 52.82 | |||||||||||||
1995 | 33.94 | 40.04 | 42.25 | a | 45.82 | 54.13 | 64.60 | 71.27 | 74.87 | 63.78 | a | 52.50 | 44.30 | 35.19 | 51.89 | |||||||||||
1996 | 30.48 | 38.31 | 39.68 | 51.02 | 64.71 | 70.00 | 73.06 | 70.97 | 62.69 | a | 51.60 | 42.05 | 33.95 | 52.38 | ||||||||||||
1997 | 31.29 | 32.73 | 46.21 | 43.32 | 58.48 | a | 68.08 | 73.55 | 70.66 | 66.68 | 51.31 | 34.60 | 26.13 | 50.25 | ||||||||||||
1998 | 33.47 | 34.80 | 39.63 | 46.08 | 61.55 | 68.76 | a | 73.52 | 71.23 | 69.38 | 54.03 | 44.42 | 33.13 | 52.50 | ||||||||||||
1999 | 37.16 | 41.18 | 45.82 | a | 46.50 | 57.08 | 66.95 | 73.77 | 71.35 | 61.48 | 54.20 | a | 48.18 | 32.90 | 53.05 | |||||||||||
2000 | 36.48 | 43.24 | 42.87 | 52.28 | 62.85 | 68.33 | 74.52 | 74.40 | 67.38 | a | 53.13 | 34.43 | 31.39 | 53.44 | ||||||||||||
2001 | 30.13 | 36.34 | 42.53 | 54.10 | 59.53 | 71.45 | 76.45 | 72.39 | 66.45 | 53.89 | 43.90 | 33.58 | 53.39 | |||||||||||||
2002 | 30.15 | 34.52 | 39.43 | a | 54.27 | 61.08 | 74.18 | 76.02 | 72.90 | 65.32 | 48.44 | 40.07 | 31.16 | 52.29 | ||||||||||||
2003 | 38.08 | a | 29.80 | 42.73 | 52.95 | 61.95 | 65.35 | 79.32 | 73.56 | 61.72 | 56.68 | 40.75 | 34.21 | 53.09 | ||||||||||||
2004 | 32.82 | 34.41 | 47.77 | 47.42 | 61.89 | 66.83 | 70.15 | 68.94 | 65.17 | 52.47 | 37.97 | 34.29 | 51.68 | |||||||||||||
2005 | 36.32 | a | 37.25 | 39.39 | 49.24 | a | 59.18 | 68.15 | 76.02 | 71.23 | 69.07 | 54.63 | 44.27 | 33.32 | 53.17 | |||||||||||
2006 | 36.71 | 34.64 | 42.98 | 54.85 | 62.32 | 72.93 | 75.10 | 70.52 | 59.58 | 51.98 | 43.68 | 31.63 | 53.08 | |||||||||||||
2007 | 22.42 | 33.16 | 47.74 | 48.65 | 58.82 | 67.20 | 73.94 | 75.84 | 67.43 | 55.68 | 44.27 | 31.61 | 52.23 | |||||||||||||
2008 | 31.63 | 36.34 | 41.90 | 49.48 | 57.84 | 69.78 | 75.60 | 71.06 | 63.18 | 53.55 | 43.67 | 33.81 | 52.32 | |||||||||||||
2009 | 36.72 | a | 39.50 | 44.74 | 49.95 | 62.10 | 67.08 | 73.53 | 72.08 | 62.73 | 46.50 | 43.22 | 26.77 | 52.08 | ||||||||||||
2010 | 34.69 | 30.77 | 41.42 | 50.85 | 58.53 | 72.12 | 75.15 | 73.40 | 69.08 | 55.37 | 40.37 | 36.79 | 53.21 | |||||||||||||
2011 | 31.47 | 31.04 | 45.69 | 51.73 | 57.60 | 72.97 | 77.61 | 76.53 | 65.18 | 53.58 | 41.15 | 26.74 | b | 52.61 | ||||||||||||
2012 | 37.34 | 34.86 | 48.60 | 54.90 | 61.06 | 75.50 | 77.45 | 74.95 | 65.22 | 52.05 | 45.40 | 32.48 | 54.98 | |||||||||||||
2013 | 32.50 | 32.91 | 41.47 | 46.65 | 59.27 | 73.40 | 74.52 | 73.58 | 68.27 | 51.24 | 41.07 | 32.23 | 52.26 | |||||||||||||
2014 | 33.32 | 34.82 | 43.70 | a | 49.97 | 58.97 | 71.20 | 74.44 | 71.63 | 68.03 | a | 55.97 | 38.22 | 33.14 | b | 52.78 | ||||||||||
2015 | 33.97 | a | 35.07 | 46.11 | 51.43 | 55.73 | 70.95 | 73.06 | 74.53 | 70.37 | 58.55 | 40.36 | a | 35.29 | 53.79 | |||||||||||
2016 | 33.40 | 40.78 | 43.52 | 49.22 | 56.82 | 72.53 | a | 74.60 | u | 68.38 | k | 67.62 | 59.68 | 46.75 | 31.71 | 50.20 | b | |||||||||
2017 | 30.35 | 43.46 | 49.52 | 50.97 | 56.76 | 70.75 | 75.15 | 69.69 | 65.42 | 53.03 | 47.77 | 37.07 | a | 54.16 | ||||||||||||
2018 | 36.02 | 36.68 | 45.79 | 50.22 | 65.02 | 74.98 | 76.84 | 72.55 | 68.22 | a | 51.84 | 38.17 | 33.00 | 54.11 | ||||||||||||
2019 | 34.06 | 34.98 | 40.52 | 52.03 | 54.55 | 68.40 | 76.00 | 75.87 | 72.17 | 45.92 | 41.02 | 34.03 | 52.46 | |||||||||||||
2020 | 35.66 | 32.97 | 47.81 | 50.25 | 63.52 | 72.68 | 75.35 | 76.58 | 64.22 | 52.45 | 46.73 | 33.92 | 54.34 | |||||||||||||
2021 | 32.98 | 30.50 | a | 41.84 | 49.13 | 59.06 | 70.83 | 75.29 | 73.56 | 68.90 | 54.87 | 46.45 | 41.52 | 53.75 | ||||||||||||
2022 | 35.47 | a | 30.86 | 40.81 | 51.32 | 60.62 | a | 71.14 | b | 75.90 | 71.59 | c | 68.65 | 52.63 | 37.58 | 34.45 | a | 52.58 | ||||||||
2023 | 29.68 | 33.86 | 39.98 | 48.87 | 60.10 | 66.78 | 76.84 | 74.79 | 67.37 | 53.15 | 44.25 | 36.16 | 52.65 | |||||||||||||
2024 | 30.48 | a | 39.69 | 42.56 | 50.97 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.58 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 32.08 | 35.08 | 41.63 | 49.96 | 59.20 | 69.30 | 74.17 | 72.14 | 65.12 | 53.38 | 41.12 | 33.08 | 52.16 | |||||||||||||
S.D. | 4.16 | 4.19 | 3.90 | 3.03 | 2.53 | 2.83 | 1.91 | 1.91 | 2.68 | 2.85 | 3.81 | 3.64 | 1.12 | |||||||||||||
SKEW | -0.63 | -0.48 | -0.50 | -0.14 | 0.16 | 0.16 | -0.03 | 0.24 | 0.06 | -0.25 | -0.41 | -0.38 | 0.26 | |||||||||||||
MAX | 40.63 | 43.46 | 49.52 | 57.00 | 65.02 | 75.50 | 79.32 | 76.58 | 72.17 | 61.65 | 48.18 | 41.81 | 54.98 | |||||||||||||
MIN | 21.55 | 21.10 | 30.05 | 42.62 | 54.13 | 63.40 | 69.18 | 68.50 | 59.58 | 45.92 | 31.73 | 20.77 | 49.46 | |||||||||||||
YRS | 77 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 76 | 76 | 76 | 76 | 75 |