YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.78 | 81.32 | 81.82 | 75.85 | 68.61 | 49.55 | 45.05 | b | 69.14 | e | ||||||
1939 | 48.26 | 44.38 | 59.02 | 65.47 | 74.56 | 83.80 | 83.19 | 79.19 | 77.00 | 66.66 | 50.15 | 47.87 | 64.96 | |||||||||||||
1940 | 38.13 | 49.33 | 58.77 | 66.00 | 73.18 | 77.03 | a | ----- | z | 80.15 | 76.17 | 66.13 | 51.40 | 48.11 | 62.22 | a | ||||||||||
1941 | 46.65 | 49.91 | 52.73 | 62.77 | 71.16 | 76.00 | 80.58 | 80.89 | 75.75 | f | 68.05 | 53.98 | 47.50 | 62.75 | a | |||||||||||
1942 | 42.55 | 47.61 | 53.66 | 64.05 | 72.10 | 81.70 | 82.32 | 80.21 | 71.57 | 63.48 | b | 55.93 | 48.39 | d | 63.63 | |||||||||||
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | 39.37 | 47.78 | 52.48 | 71.43 | 75.66 | 84.62 | 83.84 | 83.61 | 74.70 | 64.35 | 49.60 | 49.56 | 64.75 | |||||||||||||
1949 | 36.24 | 49.98 | 58.18 | 61.20 | 75.81 | 81.17 | 84.13 | 80.60 | 75.33 | 62.87 | 56.18 | 46.47 | 64.01 | |||||||||||||
1950 | 50.31 | 53.00 | 56.92 | 65.80 | 74.66 | 82.73 | 82.39 | 82.08 | 75.77 | 70.19 | 53.22 | 46.35 | 66.12 | |||||||||||||
1951 | 42.45 | 49.43 | 55.35 | 63.97 | 75.32 | 82.70 | 86.32 | 85.18 | 77.28 | 68.11 | 50.78 | 47.97 | 65.41 | |||||||||||||
1952 | 49.90 | 49.83 | 54.08 | a | 63.62 | 72.79 | 83.13 | 80.81 | 85.73 | 75.38 | 63.18 | 49.07 | 44.16 | 64.31 | ||||||||||||
1953 | 50.74 | 47.29 | 60.39 | 65.27 | 73.27 | 87.42 | 86.90 | 83.52 | 76.90 | 66.06 | 53.85 | 41.00 | 66.05 | |||||||||||||
1954 | 47.27 | 53.18 | 56.32 | 68.95 | 71.44 | 81.83 | 85.47 | 84.24 | 80.85 | 67.58 | 54.55 | 46.87 | 66.55 | |||||||||||||
1955 | 43.03 | 46.88 | 56.97 | a | 67.22 | 74.31 | 81.33 | 81.98 | 82.15 | 78.08 | 65.87 | 52.62 | 47.77 | 64.85 | ||||||||||||
1956 | 45.94 | 46.79 | 57.94 | 64.23 | 78.73 | 85.75 | 85.31 | 83.71 | 78.50 | 69.02 | 49.63 | 47.18 | 66.06 | |||||||||||||
1957 | 46.24 | 56.25 | 57.82 | 62.75 | 71.85 | 81.25 | 85.65 | 84.37 | 76.47 | 63.23 | 49.32 | 48.23 | 65.29 | |||||||||||||
1958 | 42.58 | 46.80 | 50.32 | 62.57 | 74.32 | 84.37 | 86.13 | 83.03 | 76.10 | 61.94 | 53.55 | 43.16 | 63.74 | |||||||||||||
1959 | 42.84 | 47.50 | 53.79 | 62.80 | 74.60 | 80.92 | 80.60 | 83.56 | 78.18 | 64.60 | 47.85 | 46.55 | 63.65 | |||||||||||||
1960 | 43.37 | 44.05 | 52.95 | 66.53 | 74.27 | 83.98 | 81.34 | 81.58 | 76.68 | 67.61 | 54.32 | 40.55 | 63.94 | |||||||||||||
1961 | 40.42 | 48.57 | 55.98 | 65.30 | 74.53 | 80.27 | 80.45 | 80.85 | 75.70 | 65.87 | 48.65 | 44.94 | 63.46 | |||||||||||||
1962 | 39.08 | 54.34 | 53.60 | 67.08 | 77.73 | 80.73 | 83.82 | 84.50 | 76.03 | 67.63 | 55.07 | 45.63 | 65.44 | |||||||||||||
1963 | 39.94 | 48.25 | 58.76 | 70.13 | 75.82 | 80.57 | 85.08 | 83.18 | 77.27 | 69.08 | 53.45 | 39.90 | 65.12 | |||||||||||||
1964 | 41.61 | 42.62 | 55.56 | 66.33 | 75.29 | 81.40 | 85.98 | 85.00 | 75.18 | 64.82 | 54.08 | 46.27 | 64.51 | |||||||||||||
1965 | 47.60 | 45.09 | 49.65 | 69.08 | 74.03 | 80.80 | 84.45 | 81.10 | 76.07 | 64.44 | 58.15 | 49.48 | 64.99 | |||||||||||||
1966 | 38.97 | 43.91 | 58.24 | 63.32 | 73.19 | 79.90 | 85.98 | 79.94 | 75.50 | 61.45 | 57.20 | 42.97 | 63.38 | |||||||||||||
1967 | 43.52 | 48.16 | 61.76 | 70.82 | 72.66 | 81.60 | 83.77 | 79.82 | 73.25 | 65.29 | 55.17 | 42.52 | 64.86 | |||||||||||||
1968 | 45.42 | 46.93 | 54.63 | 63.25 | 73.71 | 81.20 | 80.79 | 80.58 | 72.77 | 66.19 | 51.23 | 43.45 | 63.35 | |||||||||||||
1969 | 49.77 | a | 49.89 | 48.53 | 66.65 | 73.23 | 80.52 | 85.50 | 84.10 | 75.70 | 62.56 | 51.25 | 47.11 | 64.57 | ||||||||||||
1970 | 43.17 | a | 47.86 | 51.21 | 62.80 | 71.48 | 78.40 | 82.18 | 82.03 | 74.77 | 59.50 | 51.05 | 48.87 | 62.78 | ||||||||||||
1971 | 45.71 | 46.70 | 56.19 | 62.98 | 73.08 | 80.37 | 82.23 | 76.94 | 74.17 | 65.02 | 53.92 | 47.19 | 63.71 | |||||||||||||
1972 | 44.60 | 49.26 | 60.85 | 69.82 | 71.95 | 80.02 | 82.03 | 78.60 | 75.17 | 64.45 | 47.53 | 42.23 | 63.88 | |||||||||||||
1973 | 39.15 | 43.84 | 55.35 | 59.97 | 70.26 | 78.92 | 79.71 | 79.92 | 74.33 | 65.63 | 56.12 | 44.40 | 62.30 | |||||||||||||
1974 | 42.90 | 47.62 | 62.02 | 65.92 | 76.61 | 81.72 | 82.92 | 78.45 | 67.00 | 64.44 | 51.95 | 44.06 | 63.80 | |||||||||||||
1975 | 44.69 | 48.48 | 54.79 | 62.80 | 70.68 | 81.18 | 78.03 | 79.87 | 70.68 | 65.08 | a | 51.92 | 44.60 | 62.73 | ||||||||||||
1976 | 42.05 | 53.79 | 56.28 | a | 67.05 | 69.66 | 80.65 | 78.45 | 80.58 | 72.95 | 58.21 | 45.17 | 41.31 | 62.18 | ||||||||||||
1977 | 39.52 | 49.09 | 54.58 | 64.90 | 76.45 | 82.78 | 84.40 | 86.27 | 81.72 | 66.26 | 53.38 | 48.44 | 65.65 | |||||||||||||
1978 | 39.10 | 44.07 | 57.32 | 68.98 | 75.15 | 82.00 | 85.00 | 81.37 | 73.45 | 64.69 | 53.73 | 42.81 | 63.97 | |||||||||||||
1979 | 38.77 | 46.36 | 54.40 | 65.05 | 71.45 | 77.73 | 83.69 | 79.58 | 74.32 | 66.52 | 48.30 | 44.76 | 62.58 | |||||||||||||
1980 | 44.89 | 49.24 | 54.85 | 61.82 | 72.94 | 86.48 | 87.56 | 83.18 | 75.80 | 61.84 | 48.78 | 46.97 | 64.53 | |||||||||||||
1981 | 44.24 | 48.48 | 54.05 | 65.28 | 71.02 | 80.55 | 83.79 | 78.77 | 74.70 | 64.16 | 55.55 | 47.63 | 64.02 | |||||||||||||
1982 | 44.03 | b | 48.58 | d | 57.26 | ----- | z | 73.31 | 80.95 | 84.85 | 83.98 | 78.38 | 65.08 | 52.57 | 43.56 | 64.78 | a | |||||||||
1983 | 43.97 | 50.39 | 59.05 | 62.52 | 72.92 | 80.58 | 85.32 | 84.08 | 79.78 | 69.23 | 58.20 | 41.90 | 65.66 | |||||||||||||
1984 | 41.66 | 49.50 | 56.77 | 64.57 | 76.05 | 79.72 | 82.13 | 80.92 | 73.78 | 63.81 | 53.98 | 50.73 | 64.47 | |||||||||||||
1985 | 42.31 | 47.79 | 60.23 | 67.92 | 74.82 | 79.45 | 82.27 | a | 84.44 | f | 76.66 | k | 64.96 | h | 58.10 | i | 43.23 | i | 64.97 | e | ||||||
1986 | 47.46 | h | 52.90 | h | 57.90 | j | 70.18 | h | 74.39 | i | 78.83 | i | 81.54 | h | 82.17 | j | ----- | z | 65.70 | i | 52.42 | j | 44.64 | m | ----- | z |
1987 | 44.68 | i | 51.00 | h | 50.68 | n | 59.84 | h | 71.19 | o | 78.25 | h | 81.65 | h | 82.29 | j | 73.23 | h | 67.70 | i | 52.83 | i | 45.05 | i | ----- | z |
1988 | 43.59 | o | 47.79 | 54.39 | 63.40 | 73.06 | 80.43 | 81.29 | 81.34 | 74.68 | 66.53 | 54.23 | 43.58 | 65.52 | a | |||||||||||
1989 | 45.71 | 45.91 | 57.66 | 67.97 | 76.45 | 80.62 | 84.65 | 81.89 | 73.30 | 65.76 | 52.77 | 38.26 | 64.24 | |||||||||||||
1990 | 45.48 | 50.04 | 56.19 | 66.02 | 72.94 | 87.85 | 79.85 | 78.82 | 75.10 | 63.61 | 55.55 | 43.40 | 64.57 | |||||||||||||
1991 | 41.61 | 51.05 | 57.02 | 65.60 | 76.42 | 82.55 | 80.48 | 80.29 | 70.97 | 64.58 | a | 48.70 | 46.05 | 63.78 | ||||||||||||
1992 | 42.34 | 50.59 | 58.08 | 65.10 | 69.82 | 79.30 | 83.08 | 80.65 | 77.27 | 66.69 | 48.50 | 46.53 | 64.00 | |||||||||||||
1993 | 44.35 | 48.04 | 55.95 | 65.27 | 73.11 | 81.73 | 84.13 | 83.21 | 74.93 | 62.55 | 49.37 | 46.16 | 64.07 | |||||||||||||
1994 | 43.15 | 48.82 | 57.53 | 64.93 | 74.08 | 86.35 | 85.47 | 84.10 | 74.82 | 66.60 | 55.58 | 49.11 | 65.88 | |||||||||||||
1995 | 45.82 | 53.05 | 56.15 | 64.03 | 73.32 | 79.27 | 84.19 | 83.79 | 74.95 | 65.37 | 54.48 | 45.27 | 64.98 | |||||||||||||
1996 | 44.21 | 50.86 | 52.42 | 64.13 | 81.24 | 84.40 | 84.48 | 80.32 | 73.83 | 64.60 | 53.50 | 47.17 | a | 65.10 | ||||||||||||
1997 | 41.24 | 46.14 | 57.73 | 60.80 | 73.24 | 80.08 | 84.76 | 82.94 | 77.73 | 65.03 | 51.27 | 41.76 | 63.56 | |||||||||||||
1998 | 48.34 | 49.36 | 55.02 | 61.70 | 77.94 | 85.75 | 87.15 | 81.89 | 79.73 | 68.90 | 57.37 | 45.06 | 66.52 | |||||||||||||
1999 | 48.40 | 54.82 | 57.56 | 65.98 | 74.02 | 80.85 | 83.35 | 84.66 | 76.43 | 63.98 | 56.58 | 44.27 | 65.91 | |||||||||||||
2000 | 47.85 | 55.33 | 59.65 | 68.22 | 79.70 | a | 81.13 | 87.37 | 84.85 | 79.40 | 65.37 | 47.88 | 41.48 | 66.52 | ||||||||||||
2001 | 42.13 | 50.44 | a | 53.52 | 67.68 | 76.71 | 84.93 | 87.21 | 83.13 | 77.05 | 67.39 | 55.22 | 46.48 | 65.99 | ||||||||||||
2002 | 49.47 | 48.18 | 57.26 | 74.17 | 79.87 | 87.37 | 85.90 | 88.97 | 79.87 | d | 66.60 | 53.03 | 46.90 | 68.13 | ||||||||||||
2003 | 48.19 | 50.71 | 60.55 | 70.53 | 78.84 | 85.00 | 86.55 | 87.10 | 79.07 | 70.48 | 58.77 | 48.18 | 68.66 | |||||||||||||
2004 | 49.77 | 49.33 | 63.39 | 65.82 | 78.52 | 85.20 | 85.90 | b | 83.44 | 77.65 | 68.84 | 53.77 | 47.32 | 67.41 | ||||||||||||
2005 | 52.32 | 52.12 | 57.32 | 66.48 | 76.55 | 86.40 | 86.74 | 84.11 | 84.13 | 68.18 | 57.52 | 48.45 | 68.36 | |||||||||||||
2006 | 53.08 | 52.93 | 62.53 | b | 73.93 | 82.50 | 87.15 | 89.19 | 85.74 | 76.22 | 68.94 | 58.27 | 47.11 | 69.80 | ||||||||||||
2007 | 43.35 | 52.32 | 62.34 | 64.78 | 73.15 | 82.93 | 83.26 | 84.95 | 81.03 | 72.08 | 56.45 | 49.03 | 67.14 | |||||||||||||
2008 | 46.05 | 55.12 | 60.37 | 68.15 | 78.71 | 88.77 | 81.77 | 80.71 | 71.42 | 64.18 | 52.67 | 45.81 | 66.14 | |||||||||||||
2009 | 45.26 | 52.64 | 58.97 | 66.18 | 76.05 | 83.17 | 84.44 | 84.95 | 74.65 | 64.48 | 54.78 | 41.68 | 65.60 | |||||||||||||
2010 | 42.93 | a | 45.93 | 55.06 | 65.42 | 73.89 | 86.07 | 81.18 | 84.45 | 77.87 | 67.02 | 52.85 | 47.53 | 65.02 | ||||||||||||
2011 | 43.02 | 45.55 | 62.87 | 71.97 | 74.35 | 88.97 | 87.98 | 88.95 | 77.32 | 67.60 | 54.57 | 41.95 | 67.09 | |||||||||||||
2012 | 47.40 | 49.76 | 62.11 | 71.90 | 75.18 | 85.65 | 83.61 | 84.71 | 76.40 | 64.56 | 56.75 | 46.85 | 67.07 | |||||||||||||
2013 | 43.60 | 48.25 | 57.63 | 64.07 | 73.60 | 85.05 | 81.71 | 85.18 | 78.12 | b | 65.97 | a | 53.74 | a | 43.90 | 65.07 | ||||||||||
2014 | 44.74 | 46.68 | i | 56.94 | 66.30 | 73.71 | 85.60 | 85.56 | 85.39 | 75.78 | 68.71 | 50.75 | 48.35 | 67.44 | a | |||||||||||
2015 | 41.87 | 48.02 | 55.39 | 65.48 | 72.47 | 82.03 | 87.39 | 86.08 | 81.05 | 67.95 | 55.54 | f | 48.16 | 66.90 | a | |||||||||||
2016 | 45.40 | a | 51.24 | 60.63 | 65.83 | i | 72.55 | 81.47 | 88.24 | 81.50 | 76.83 | 70.60 | 57.33 | 46.56 | 66.58 | a | ||||||||||
2017 | 47.02 | 55.04 | 63.25 | c | 67.93 | 73.61 | 85.18 | k | 84.46 | f | 80.82 | 76.88 | 65.18 | 57.53 | 44.55 | 63.18 | b | |||||||||
2018 | 41.97 | 49.93 | 61.58 | 66.00 | 81.58 | e | 85.93 | a | 85.34 | 85.32 | 75.35 | 64.08 | 49.60 | 45.39 | 66.01 | |||||||||||
2019 | 45.29 | 51.34 | 54.76 | 66.55 | 72.82 | 81.02 | 85.87 | 88.84 | 81.65 | 63.87 | 52.85 | 48.27 | a | 66.09 | ||||||||||||
2020 | 47.58 | 47.79 | 61.50 | 66.73 | 77.84 | 83.80 | 88.97 | 88.02 | 73.40 | 65.60 | 58.47 | 44.18 | 66.99 | |||||||||||||
2021 | 44.44 | 42.62 | 57.98 | 62.40 | d | 75.95 | a | 83.70 | c | 82.47 | 82.09 | o | 79.63 | 68.60 | 55.26 | c | 55.06 | 64.37 | a | |||||||
2022 | 42.39 | 42.48 | 54.63 | 68.95 | 78.95 | a | 84.95 | 88.26 | 82.81 | 76.63 | 64.73 | 50.00 | a | 48.18 | 65.25 | |||||||||||
2023 | 47.69 | 48.77 | 58.18 | 64.23 | 75.47 | 87.26 | c | 88.68 | q | 88.52 | 83.17 | 68.97 | 55.65 | 50.11 | 66.18 | a | ||||||||||
2024 | 44.65 | 54.17 | 58.92 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.41 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 44.37 | 49.04 | 56.97 | 65.89 | 74.67 | 82.60 | 84.03 | 82.88 | 76.28 | 65.81 | 53.16 | 45.80 | 65.08 | |||||||||||||
S.D. | 3.44 | 3.15 | 3.24 | 2.95 | 2.73 | 2.82 | 2.52 | 2.67 | 2.89 | 2.50 | 3.14 | 2.85 | 1.55 | |||||||||||||
SKEW | 0.19 | 0.14 | -0.08 | 0.65 | 0.72 | 0.29 | -0.13 | 0.28 | 0.05 | -0.16 | -0.24 | -0.07 | 0.60 | |||||||||||||
MAX | 53.08 | 56.25 | 63.39 | 74.17 | 82.50 | 88.97 | 89.19 | 88.97 | 84.13 | 72.08 | 58.77 | 55.06 | 69.80 | |||||||||||||
MIN | 36.24 | 42.48 | 48.53 | 59.97 | 69.66 | 76.00 | 78.03 | 76.94 | 67.00 | 58.21 | 45.17 | 38.26 | 62.18 | |||||||||||||
YRS | 78 | 78 | 78 | 76 | 78 | 78 | 76 | 77 | 77 | 78 | 77 | 78 | 67 |