YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 38.48 | 39.71 | a | 44.97 | 68.40 | 73.00 | 80.40 | 88.65 | 88.61 | 82.13 | 66.81 | 44.17 | 38.61 | 62.83 | ||||||||||||
1949 | 21.77 | 39.79 | 48.32 | 62.97 | 71.48 | 77.70 | 91.06 | 87.39 | 76.27 | 61.42 | 61.40 | 44.12 | f | 63.60 | a | |||||||||||
1950 | 40.10 | a | 49.86 | 47.10 | 57.53 | 65.81 | 84.20 | 85.39 | 84.26 | 70.83 | 71.84 | 48.76 | a | 46.48 | 62.68 | |||||||||||
1951 | 37.32 | 46.36 | 46.23 | 54.70 | 69.03 | 71.20 | 85.35 | 84.48 | 71.83 | 59.71 | 50.13 | 34.45 | 59.23 | |||||||||||||
1952 | 41.48 | 43.59 | 39.58 | 61.13 | 67.45 | 86.90 | 89.19 | 87.52 | 81.17 | 66.97 | 43.63 | 35.35 | 62.00 | |||||||||||||
1953 | 47.06 | 40.82 | 55.10 | 52.33 | 66.32 | 83.50 | 87.90 | 85.06 | 83.17 | 69.32 | 50.93 | 41.03 | 63.55 | |||||||||||||
1954 | 44.47 | a | 56.04 | 43.81 | 65.47 | 65.94 | 83.83 | 92.97 | 88.16 | 80.53 | 62.13 | 55.83 | 45.58 | 65.40 | ||||||||||||
1955 | 35.48 | 35.43 | 47.55 | 63.97 | 71.65 | 72.67 | 91.84 | 89.03 | 78.40 | 67.97 | 43.30 | 39.77 | 61.42 | |||||||||||||
1956 | 41.65 | 38.66 | 51.35 | 56.00 | 72.26 | 88.83 | 85.68 | 84.23 | 82.07 | 70.39 | 44.03 | 44.84 | 63.33 | |||||||||||||
1957 | 31.81 | 50.11 | 45.32 | 50.70 | 63.48 | 77.43 | 87.68 | 86.00 | 74.87 | 58.23 | 44.43 | 49.48 | 59.96 | |||||||||||||
1958 | 45.48 | 41.36 | 36.19 | 52.93 | 73.77 | 79.37 | 81.39 | 88.45 | 78.43 | 66.48 | 52.37 | 38.00 | 61.19 | |||||||||||||
1959 | 37.10 | 35.29 | 46.19 | 58.47 | 65.68 | 85.00 | 88.26 | 89.06 | 73.53 | 59.61 | 48.72 | a | 47.55 | 61.21 | ||||||||||||
1960 | 36.19 | 30.72 | 45.16 | 63.03 | 69.30 | a | 77.47 | 88.42 | 87.87 | 77.93 | 65.61 | 50.97 | 39.55 | 61.02 | ||||||||||||
1961 | 44.81 | 46.68 | 47.19 | 54.87 | 64.77 | 80.83 | 85.97 | 85.26 | 68.43 | 64.00 | 47.30 | 38.42 | 60.71 | |||||||||||||
1962 | 33.84 | 42.96 | 46.52 | 64.53 | 72.97 | 76.53 | 83.39 | 86.74 | 75.17 | 67.39 | 53.67 | 45.48 | 62.43 | |||||||||||||
1963 | 29.35 | 48.11 | 50.29 | 63.07 | 73.97 | 84.30 | 91.06 | 85.00 | 79.93 | 72.52 | 55.10 | 37.97 | 64.22 | |||||||||||||
1964 | 43.84 | 37.72 | 43.19 | 57.17 | 72.23 | 79.77 | 92.32 | 84.58 | 76.30 | 67.42 | 51.53 | 40.77 | 62.24 | |||||||||||||
1965 | 45.35 | 41.93 | 37.71 | 63.87 | 69.94 | 74.57 | 84.42 | 82.74 | 63.47 | 68.48 | 55.03 | 43.61 | 60.93 | |||||||||||||
1966 | 32.33 | a | 35.32 | 53.90 | 55.90 | 75.00 | 79.87 | 89.74 | 80.74 | 74.43 | 65.35 | 51.97 | 39.81 | 61.20 | ||||||||||||
1967 | 45.35 | 47.07 | 56.40 | a | 62.00 | 62.26 | 73.33 | 84.87 | 84.16 | 76.43 | 67.19 | 49.47 | 33.42 | 61.83 | ||||||||||||
1968 | 40.74 | 45.69 | 54.06 | 57.73 | 63.06 | 81.80 | 85.74 | 82.52 | 75.87 | 66.71 | 48.17 | 36.90 | 61.58 | |||||||||||||
1969 | 38.55 | 42.96 | 42.84 | 64.60 | 71.77 | 73.00 | 88.39 | 87.48 | 80.03 | 49.48 | 51.50 | 43.13 | 61.15 | |||||||||||||
1970 | 39.71 | 51.89 | a | 42.19 | 55.13 | 73.35 | 79.73 | 87.68 | 90.03 | 74.97 | 58.39 | 49.93 | 42.48 | 62.12 | ||||||||||||
1971 | 38.58 | 39.04 | 45.74 | 58.67 | 64.61 | 82.90 | 84.77 | 88.16 | 71.10 | 61.19 | 50.97 | 42.16 | 60.66 | |||||||||||||
1972 | 37.48 | 48.86 | 58.87 | a | 61.17 | a | 69.55 | 81.77 | 83.47 | a | 84.10 | a | 74.67 | 60.74 | 39.07 | 31.87 | 60.97 | |||||||||
1973 | 36.29 | 43.71 | 47.48 | 53.77 | 68.42 | 82.20 | 84.48 | 90.06 | 69.03 | 65.10 | 46.90 | 40.32 | 60.65 | |||||||||||||
1974 | 32.48 | 46.14 | 51.74 | 60.10 | 73.42 | 82.13 | 91.06 | 82.16 | 76.43 | 68.48 | 51.30 | 42.52 | 63.17 | |||||||||||||
1975 | 39.19 | 38.82 | 45.93 | a | 56.00 | 66.58 | 77.23 | 89.81 | 87.16 | 75.37 | 68.68 | 48.33 | 43.42 | 61.38 | ||||||||||||
1976 | 38.00 | 49.59 | 48.90 | 59.57 | 68.23 | 80.53 | 88.55 | 86.84 | 77.10 | 62.29 | 48.30 | 46.23 | 62.84 | |||||||||||||
1977 | 31.84 | 47.79 | 45.90 | a | 62.13 | 73.13 | 83.90 | 88.52 | 81.61 | 80.17 | 66.81 | 47.63 | 41.16 | 62.55 | ||||||||||||
1978 | 27.90 | 29.96 | 49.61 | 57.70 | 64.06 | 79.33 | 88.81 | 84.65 | 79.60 | 65.03 | 42.73 | 30.26 | 58.30 | |||||||||||||
1979 | 23.29 | 39.86 | 47.17 | a | 58.17 | 63.61 | 76.63 | 85.35 | 82.03 | 80.47 | 66.29 | 39.73 | 41.52 | 58.68 | ||||||||||||
1980 | 30.35 | 37.24 | 42.45 | 56.33 | 65.74 | 84.73 | 92.48 | 86.52 | 80.30 | 65.06 | 51.87 | 49.45 | 61.88 | |||||||||||||
1981 | 47.19 | 45.29 | 50.84 | 66.40 | 64.26 | 81.93 | 87.29 | 83.39 | 81.10 | 62.39 | 55.93 | 46.03 | 64.34 | |||||||||||||
1982 | 38.03 | a | 43.96 | 50.00 | 59.77 | 66.68 | 73.77 | 86.58 | 86.90 | b | 75.37 | 63.56 | d | 44.23 | 41.81 | 60.89 | ||||||||||
1983 | 43.35 | 49.32 | 45.94 | 51.83 | 64.37 | a | 74.07 | b | 87.93 | a | 90.74 | 79.57 | 65.71 | 47.30 | 24.10 | b | 60.35 | |||||||||
1984 | 38.30 | a | 44.59 | 46.19 | 49.80 | 71.97 | a | 80.60 | 88.52 | 89.84 | 72.03 | 57.61 | 52.70 | 38.42 | 60.88 | |||||||||||
1985 | 32.43 | a | 38.18 | 55.29 | 65.10 | 74.06 | 80.67 | 88.23 | 86.52 | 69.80 | 62.48 | 33.43 | 31.77 | 59.83 | ||||||||||||
1986 | 41.06 | 41.75 | 57.84 | 60.20 | 68.10 | 82.33 | 88.52 | 85.97 | 72.03 | 60.97 | 46.70 | j | ----- | z | 65.88 | b | ||||||||||
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 85.69 | b | 84.39 | 72.00 | 63.37 | a | 44.83 | 42.32 | 65.43 | f | ||||
1997 | 36.74 | 39.68 | 56.26 | 52.83 | 68.65 | 81.20 | 88.71 | 84.32 | 78.57 | 63.16 | 46.80 | 39.32 | 61.35 | |||||||||||||
1998 | 43.90 | 43.96 | 46.68 | 59.50 | 72.48 | 76.10 | 87.90 | 87.74 | 84.64 | b | 59.42 | 51.80 | 39.48 | 62.80 | ||||||||||||
1999 | 44.29 | 52.62 | b | 56.23 | 54.13 | 68.26 | 80.90 | 89.80 | a | 85.48 | 73.24 | a | 68.45 | b | 61.07 | 46.03 | 65.04 | |||||||||
2000 | 43.10 | 50.10 | 51.84 | 64.33 | 73.84 | 83.33 | 92.29 | 93.45 | b | 79.17 | 63.29 | 38.79 | a | 37.47 | a | 64.25 | ||||||||||
2001 | 42.52 | 37.14 | 49.84 | 61.07 | 68.44 | f | 83.43 | 91.94 | 89.45 | 79.70 | 64.84 | 59.40 | e | 40.81 | 63.65 | a | ||||||||||
2002 | 42.10 | 47.18 | 45.23 | 63.41 | a | 71.10 | a | 88.10 | a | 92.90 | a | 85.84 | 76.27 | 55.16 | 48.00 | 46.80 | a | 63.51 | ||||||||
2003 | 48.19 | 38.36 | 53.39 | 61.60 | 68.74 | 76.33 | 94.60 | a | 90.42 | 75.43 | 71.90 | b | 47.10 | 44.19 | 64.19 | |||||||||||
2004 | 43.87 | 43.07 | 58.23 | 61.67 | 73.68 | 77.10 | 86.42 | 83.19 | 78.47 | 64.53 | a | 46.83 | 44.74 | 63.48 | ||||||||||||
2005 | 40.26 | 47.79 | 52.45 | 58.73 | 68.65 | 79.40 | 92.10 | b | 84.13 | 81.57 | 63.97 | 56.17 | 41.65 | 63.90 | ||||||||||||
2006 | 51.16 | 41.64 | 47.19 | 66.13 | 75.16 | 87.10 | a | 92.16 | 86.48 | 72.30 | 61.45 | 52.87 | 41.32 | 64.58 | ||||||||||||
2007 | 29.24 | f | 35.82 | 59.16 | 58.00 | 72.29 | 82.83 | 90.87 | 90.90 | 79.73 | 67.48 | 55.03 | 31.97 | 65.83 | a | |||||||||||
2008 | 32.42 | 42.00 | 51.65 | 59.83 | 67.90 | 79.53 | 91.48 | 83.77 | 75.47 | 63.45 | 53.00 | 36.71 | 61.44 | |||||||||||||
2009 | 44.27 | a | 46.54 | 53.97 | 56.86 | a | 70.32 | 77.70 | 86.74 | 85.45 | 76.57 | 52.00 | 56.10 | 31.52 | d | 61.50 | ||||||||||
2010 | 42.77 | 37.96 | 53.17 | a | 62.73 | 67.65 | 82.47 | 91.03 | a | 91.00 | 84.03 | 69.16 | 48.97 | 44.87 | 64.65 | |||||||||||
2011 | 39.61 | 39.82 | 53.61 | 59.57 | 65.77 | 82.93 | 92.77 | 92.35 | 79.10 | 66.90 | 54.37 | 44.58 | 64.28 | |||||||||||||
2012 | 49.71 | 41.57 | a | 66.23 | 68.60 | 77.39 | 93.93 | 96.90 | 91.71 | 82.07 | 61.87 | 57.63 | 43.13 | a | 69.23 | |||||||||||
2013 | 42.45 | 41.96 | 52.03 | 53.90 | 71.81 | 86.23 | 88.06 | 90.74 | 80.60 | 59.55 | 52.37 | 41.00 | 63.39 | |||||||||||||
2014 | 42.84 | 32.89 | 52.71 | 63.27 | 71.10 | 79.30 | 88.48 | 88.16 | 79.63 | 68.77 | 46.87 | 39.61 | 62.80 | |||||||||||||
2015 | 41.16 | 45.29 | 61.10 | 61.70 | 62.55 | 83.52 | i | 87.61 | 87.90 | 84.43 | 67.84 | 49.93 | 38.61 | 62.56 | a | |||||||||||
2016 | 38.74 | 48.69 | 57.68 | 60.00 | 67.68 | 88.33 | 90.74 | 84.71 | 78.63 | 72.58 | 56.60 | 36.84 | f | 67.67 | a | |||||||||||
2017 | 37.29 | 50.93 | 60.45 | 61.50 | 68.47 | a | 83.80 | 93.74 | 85.65 | 78.87 | 64.10 | 57.37 | 41.06 | 65.27 | ||||||||||||
2018 | 42.45 | 40.32 | 55.97 | a | 58.83 | a | 74.90 | 85.43 | 88.30 | a | 86.45 | b | 81.27 | 60.06 | 48.70 | 42.90 | 63.80 | |||||||||
2019 | 45.55 | 33.96 | 43.93 | a | 61.13 | 62.32 | 77.72 | a | 88.13 | 86.74 | 82.23 | 57.16 | 48.97 | 44.10 | 61.00 | |||||||||||
2020 | 45.58 | 43.21 | 52.74 | 61.53 | 70.03 | 88.31 | a | 91.16 | l | 92.36 | i | 79.10 | a | 59.86 | b | 57.90 | 45.65 | 60.39 | b | |||||||
2021 | 42.32 | 30.07 | 52.55 | 59.17 | 67.03 | 86.89 | k | 92.61 | h | 89.77 | 85.00 | a | 67.48 | 59.23 | 50.71 | 60.33 | b | |||||||||
2022 | 42.10 | 40.75 | 52.52 | 61.47 | 71.16 | 87.67 | 92.94 | 92.71 | 84.37 | 67.58 | 46.67 | 37.23 | 64.76 | |||||||||||||
2023 | 31.81 | 35.96 | 42.29 | 61.23 | 71.32 | 76.47 | 86.55 | 88.16 | 82.33 | 64.52 | 55.90 | 47.94 | 62.04 | |||||||||||||
2024 | 37.87 | 49.90 | 55.33 | a | 64.00 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.70 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.44 | 42.56 | 50.08 | 59.64 | 69.25 | 80.98 | 88.78 | 86.77 | 77.54 | 64.26 | 50.18 | 40.93 | 62.36 | |||||||||||||
S.D. | 5.90 | 5.72 | 5.89 | 4.24 | 3.75 | 4.55 | 3.05 | 2.90 | 4.40 | 4.58 | 5.56 | 5.09 | 1.90 | |||||||||||||
SKEW | -0.73 | -0.10 | 0.13 | -0.22 | -0.10 | 0.15 | 0.12 | 0.20 | -0.63 | -0.70 | -0.34 | -0.73 | 0.65 | |||||||||||||
MAX | 51.16 | 56.04 | 66.23 | 68.60 | 77.39 | 93.93 | 96.90 | 93.45 | 85.00 | 72.58 | 61.40 | 50.71 | 69.23 | |||||||||||||
MIN | 21.77 | 29.96 | 36.19 | 49.80 | 62.26 | 71.20 | 81.39 | 80.74 | 63.47 | 49.48 | 33.43 | 24.10 | 58.30 | |||||||||||||
YRS | 66 | 67 | 67 | 66 | 65 | 64 | 65 | 66 | 67 | 67 | 66 | 64 | 58 |