YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | 63.33 | j | 75.67 | 73.06 | 74.07 | c | 68.48 | a | 55.50 | a | 46.12 | a | 35.05 | 61.14 | e | |||
1961 | 38.07 | b | 40.91 | a | 46.32 | a | 55.04 | c | 62.82 | a | 72.25 | 73.85 | 72.80 | a | 63.68 | b | 54.84 | c | 41.19 | a | 38.88 | a | 55.05 | |||
1962 | 33.90 | 47.14 | q | 38.81 | 56.52 | a | 59.61 | c | 69.04 | f | 70.85 | 74.62 | c | 67.56 | c | 56.45 | 47.27 | 39.57 | b | 54.52 | b | |||||
1963 | 35.08 | a | 42.16 | 46.48 | a | 53.83 | a | 64.13 | a | 69.02 | a | 77.23 | a | 70.08 | a | 66.46 | e | 58.28 | a | 45.92 | 37.88 | a | 55.55 | |||
1964 | 33.90 | 36.50 | b | 48.64 | m | 52.43 | 63.71 | 69.72 | 74.52 | a | 73.92 | 68.66 | n | 56.57 | b | 47.72 | 39.42 | 54.84 | b | |||||||
1965 | 42.00 | a | 39.82 | 45.58 | a | 55.16 | a | 60.74 | b | 65.71 | b | 71.53 | k | 70.62 | b | 62.35 | f | 56.71 | 50.05 | 38.21 | 52.46 | b | ||||
1966 | 34.60 | 35.50 | c | 47.23 | 56.95 | 64.89 | 69.25 | h | 76.81 | 72.03 | 65.62 | 55.15 | 49.38 | a | 38.58 | a | 54.25 | a | ||||||||
1967 | 38.41 | b | 43.82 | 50.50 | a | 53.69 | a | 60.33 | a | ----- | z | 74.56 | 70.15 | 64.93 | b | 58.16 | 49.12 | 34.63 | a | 54.39 | a | |||||
1968 | 38.63 | a | 44.31 | 45.55 | 50.77 | 61.03 | 71.82 | 72.03 | b | 67.68 | a | 64.70 | h | 58.90 | 43.98 | a | 35.77 | 53.68 | a | |||||||
1969 | 42.44 | 39.95 | 41.19 | 54.67 | 61.90 | 69.38 | 75.03 | 75.34 | 66.27 | 55.85 | 42.81 | a | 40.43 | a | 55.44 | |||||||||||
1970 | 38.60 | 42.46 | 44.08 | 48.93 | 62.82 | 69.58 | 74.24 | 72.72 | a | 65.00 | f | 52.00 | 46.53 | 41.11 | 53.92 | a | ||||||||||
1971 | 36.31 | j | 42.54 | 48.68 | 51.91 | a | 58.19 | 70.26 | a | 76.00 | a | 70.92 | 66.45 | 53.00 | 44.87 | 37.82 | 56.42 | a | ||||||||
1972 | 41.28 | a | 43.21 | 51.73 | a | 54.07 | 59.08 | a | 70.87 | 75.15 | 70.82 | 65.65 | 57.85 | 39.93 | 38.24 | 55.66 | ||||||||||
1973 | 34.68 | 38.11 | 43.18 | 47.62 | 61.53 | 68.82 | 72.40 | a | 74.42 | 66.75 | 55.10 | a | 45.85 | 38.26 | 53.89 | |||||||||||
1974 | 38.97 | 38.72 | a | ----- | z | 54.48 | 63.38 | c | 73.15 | 71.58 | 68.50 | 63.70 | 55.73 | e | 44.23 | 36.38 | a | 55.35 | a | |||||||
1975 | 41.18 | i | 40.18 | 44.77 | 47.67 | 57.00 | 69.03 | 71.77 | 72.58 | 63.07 | 55.31 | 45.65 | 39.32 | 55.12 | a | |||||||||||
1976 | 36.12 | a | 41.22 | 41.88 | f | 51.68 | 59.63 | a | 68.47 | 70.10 | 70.79 | 62.91 | a | 50.97 | a | 42.59 | b | 36.10 | 53.69 | a | ||||||
1977 | 35.44 | g | 41.52 | 39.97 | 43.89 | b | 57.90 | a | 69.97 | 73.52 | a | 65.03 | b | ----- | z | 56.15 | a | 47.98 | 41.84 | 53.78 | b | |||||
1978 | 38.33 | a | 40.23 | 48.23 | 54.43 | 60.52 | 74.19 | f | 77.42 | 71.95 | 63.60 | 57.68 | 45.55 | 34.55 | b | 53.86 | a | |||||||||
1979 | 34.02 | c | 40.63 | b | 44.81 | b | 53.05 | a | ----- | z | 67.48 | b | 75.10 | e | 68.20 | h | 67.55 | h | 59.12 | a | 40.60 | 39.95 | b | 50.53 | c | |
1980 | 40.22 | a | 42.34 | 42.58 | e | 50.80 | 57.87 | h | 73.98 | c | 76.37 | a | 72.18 | c | 66.74 | a | 52.82 | 43.54 | b | 43.82 | a | 55.03 | a | |||
1981 | 39.56 | 43.42 | b | 43.76 | 54.53 | 61.12 | a | 74.93 | 73.69 | 69.63 | d | 66.25 | 55.47 | 48.20 | 43.69 | 56.19 | ||||||||||
1982 | 39.62 | b | 41.33 | a | 46.74 | 53.03 | a | 59.78 | b | 68.82 | 73.47 | a | 71.72 | h | 66.08 | 53.73 | 43.55 | a | 37.07 | a | 53.02 | a | ||||
1983 | 38.52 | a | 41.68 | 45.38 | b | 46.03 | 62.82 | n | 68.38 | b | 73.95 | a | 72.77 | 69.37 | 55.89 | 45.25 | 39.26 | 54.22 | a | |||||||
1984 | 38.24 | 40.69 | b | 46.66 | 51.48 | 67.62 | a | 69.25 | b | 71.95 | a | 68.85 | 65.67 | c | 51.77 | a | 43.43 | 39.60 | 54.60 | |||||||
1985 | 35.52 | 39.28 | a | 45.53 | 54.82 | 61.30 | a | 70.07 | 71.90 | b | 71.19 | b | 63.12 | 53.05 | a | 44.02 | a | 38.70 | a | 54.04 | ||||||
1986 | 40.56 | 43.11 | 47.47 | a | 55.20 | 61.35 | 69.75 | 70.60 | a | 71.23 | a | 62.57 | 52.45 | 43.38 | a | 35.76 | 54.45 | |||||||||
1987 | 35.87 | a | 37.93 | 43.02 | g | 54.78 | a | 60.10 | b | 70.30 | 71.05 | a | 70.23 | c | 63.28 | a | 57.82 | 42.08 | 35.08 | 54.41 | a | |||||
1988 | 35.65 | a | 41.38 | 44.32 | a | 52.50 | 61.15 | 68.46 | b | 70.81 | 67.67 | p | 62.16 | a | 58.35 | a | 45.31 | a | 35.83 | a | 52.36 | a | ||||
1989 | 35.87 | a | 42.46 | 50.21 | 59.41 | b | 65.25 | c | 72.07 | 73.29 | 68.45 | b | 61.67 | a | 52.26 | b | 42.07 | a | 33.66 | 54.72 | ||||||
1990 | 33.90 | 35.23 | b | 42.90 | a | 51.52 | 57.75 | a | 73.42 | d | 67.78 | d | 63.45 | 62.08 | e | 51.40 | 41.71 | b | 33.55 | 51.22 | ||||||
1991 | 34.11 | 39.21 | 39.77 | c | 49.17 | a | 57.38 | a | 63.25 | 66.27 | c | 66.95 | a | 59.98 | a | 53.90 | a | 40.73 | 34.69 | 50.45 | ||||||
1992 | 32.62 | a | 38.73 | a | 42.47 | 54.16 | a | 57.45 | b | 67.71 | b | 71.31 | 67.79 | b | 64.61 | b | 58.36 | c | 42.13 | 42.70 | a | 53.34 | ||||
1993 | 43.65 | a | 43.38 | 50.89 | m | 56.55 | i | 61.12 | a | 69.29 | b | 74.67 | a | 70.37 | d | 63.41 | b | 54.75 | c | 41.93 | a | 37.63 | a | 56.02 | b | |
1994 | 37.26 | d | 38.83 | b | 47.09 | c | 53.07 | 60.78 | a | 76.75 | b | 76.46 | d | 74.07 | a | 65.55 | 53.92 | 43.27 | b | 39.47 | b | 55.54 | ||||
1995 | 37.23 | a | 44.80 | c | 45.50 | b | 49.40 | d | 58.29 | e | 67.50 | e | 72.02 | 71.98 | b | 65.28 | a | 57.15 | e | 47.76 | k | 38.50 | l | 56.92 | b | |
1996 | 39.12 | g | 45.86 | 44.59 | c | 57.23 | j | 67.64 | c | 73.21 | a | 69.18 | c | 63.63 | a | 54.65 | g | 46.93 | d | 37.21 | i | 33.81 | d | 55.61 | d | |
1997 | 31.52 | c | 34.08 | i | 49.58 | m | 51.54 | b | 64.20 | d | 69.89 | c | 74.07 | d | 70.86 | c | 68.46 | c | 53.73 | e | 44.50 | 33.71 | b | 56.25 | b | |
1998 | 38.76 | b | 37.14 | 44.06 | e | 47.50 | e | 60.06 | g | 71.36 | a | 73.78 | b | 70.19 | d | 67.12 | a | 55.64 | f | 46.12 | 37.88 | a | 53.39 | b | ||
1999 | 40.11 | 42.31 | a | 46.45 | b | 49.90 | d | 61.55 | a | 68.88 | d | 70.71 | e | 69.84 | f | 66.02 | e | 54.72 | a | 47.89 | b | 35.95 | c | 53.14 | a | |
2000 | 41.17 | a | 43.43 | b | 45.44 | g | 56.34 | b | 67.82 | c | 72.58 | e | 74.08 | e | 70.48 | e | 67.48 | 53.43 | c | 38.30 | c | 39.94 | e | 56.82 | a | |
2001 | 33.77 | a | ----- | z | 44.44 | 52.75 | b | 62.23 | 71.88 | i | 73.36 | b | 68.94 | e | 65.67 | f | 58.48 | e | 45.59 | a | 35.83 | g | 54.94 | d | ||
2002 | 36.57 | b | 38.93 | g | 43.38 | b | 57.34 | b | 62.42 | e | 75.59 | b | 73.00 | 73.54 | g | 65.43 | c | 53.34 | b | 44.73 | b | 35.69 | 54.75 | b | ||
2003 | 42.09 | c | 41.06 | b | 43.78 | f | 51.05 | b | 62.42 | k | 70.60 | 75.91 | d | 72.87 | e | 67.52 | f | 60.35 | a | 45.67 | a | 36.55 | b | 55.13 | c | |
2004 | ----- | z | 36.66 | 49.13 | d | 51.09 | c | 63.35 | 70.29 | b | 73.43 | a | 67.39 | d | 60.64 | e | 53.48 | d | 41.55 | a | 35.33 | d | 54.76 | a | ||
2005 | 39.86 | b | 40.18 | 44.71 | 51.18 | b | 63.24 | 69.98 | c | 75.76 | b | 70.08 | 67.14 | e | 55.00 | b | 46.37 | g | 41.57 | b | 56.25 | a | ||||
2006 | 39.37 | 42.21 | d | 44.59 | b | 55.70 | c | 65.70 | c | 72.73 | f | 71.76 | h | 68.57 | c | 60.93 | h | 53.47 | b | 45.98 | a | 36.93 | c | 50.28 | c | |
2007 | 33.43 | b | 40.67 | b | 48.61 | d | 53.77 | b | 59.60 | a | 73.10 | a | 72.80 | a | 71.35 | a | 64.15 | d | 55.70 | f | 47.88 | 36.17 | a | 54.69 | a | |
2008 | 35.50 | a | 41.94 | b | 45.13 | a | 51.82 | 59.57 | c | 72.24 | c | 69.89 | c | 68.44 | f | 61.65 | d | 54.06 | g | 45.06 | d | 38.57 | d | 52.14 | b | |
2009 | 39.24 | 41.94 | c | 47.45 | b | 51.16 | b | 64.90 | b | 67.41 | c | 73.75 | i | 72.03 | a | 63.69 | d | 54.94 | f | 44.50 | a | 34.35 | d | 52.67 | b | |
2010 | 34.76 | 38.10 | b | 43.06 | f | 52.52 | 57.94 | f | 70.87 | 71.12 | e | 70.57 | c | 66.62 | d | 54.98 | 41.37 | c | 40.69 | g | 55.65 | c | ||||
2011 | 36.15 | d | 37.65 | e | 49.62 | a | 55.57 | c | 58.47 | b | 70.91 | b | 70.86 | b | 73.85 | d | 67.02 | c | 55.52 | d | 42.11 | b | 33.39 | d | 54.26 | |
2012 | 40.56 | 40.33 | c | 45.73 | c | 56.91 | b | 62.06 | 74.43 | b | 71.53 | b | 71.50 | c | 65.43 | b | 57.79 | b | 47.43 | ----- | z | 57.61 | a | |||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.18 | c | 44.02 | e | 41.50 | c | 47.57 | i |
2015 | 37.28 | d | 45.11 | e | 47.68 | f | 52.18 | e | 56.86 | c | 71.94 | c | 71.78 | a | 72.33 | k | 68.88 | d | 58.18 | c | 44.98 | j | 38.00 | j | 57.78 | d |
2016 | 36.18 | a | 44.58 | c | 48.41 | b | 53.52 | b | 59.12 | e | 72.17 | g | 77.17 | p | 69.96 | c | 66.28 | 61.06 | 48.02 | 42.63 | 52.98 | b | ||||
2017 | 40.13 | 46.91 | 53.84 | 57.12 | a | 61.73 | 74.92 | 74.10 | 71.63 | 67.83 | 60.48 | 54.03 | 42.97 | a | 58.81 | |||||||||||
2018 | 42.05 | 45.80 | 49.31 | 59.32 | 66.60 | 77.45 | a | 75.56 | 73.60 | 68.07 | a | 55.15 | 43.72 | 39.26 | 57.99 | |||||||||||
2019 | 39.40 | 39.75 | 47.44 | 56.68 | 59.13 | 72.58 | 77.29 | 76.05 | 68.50 | 56.11 | 47.03 | 38.83 | a | 56.57 | ||||||||||||
2020 | 40.77 | 41.71 | 48.76 | 55.59 | b | 67.47 | 73.20 | 77.65 | 77.92 | 68.18 | 62.22 | a | 50.48 | a | 38.12 | b | 58.51 | |||||||||
2021 | 38.82 | 43.02 | 46.47 | 57.34 | b | 65.22 | a | 75.02 | 72.95 | 71.71 | 67.93 | a | 56.57 | b | 50.55 | a | 44.66 | 57.52 | ||||||||
2022 | 38.81 | 38.85 | a | 47.18 | 57.41 | a | 67.24 | b | 74.22 | a | 75.67 | b | 71.03 | 67.71 | b | 54.53 | b | 42.52 | a | 40.80 | c | 56.33 | ||||
2023 | 37.20 | a | 39.13 | a | 45.73 | 55.02 | b | 63.21 | 71.59 | b | 80.53 | 76.22 | b | 71.20 | b | 59.90 | 48.07 | 40.95 | a | 57.40 | ||||||
2024 | 39.02 | 43.40 | 46.88 | b | 53.16 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.10 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.72 | 41.09 | 45.95 | 53.17 | 61.80 | 71.04 | 73.38 | 71.07 | 65.55 | 55.68 | 45.00 | 38.14 | 55.34 | |||||||||||||
S.D. | 2.82 | 2.61 | 2.93 | 3.19 | 2.99 | 2.82 | 2.60 | 2.86 | 2.42 | 2.80 | 3.01 | 2.90 | 2.10 | |||||||||||||
SKEW | -0.10 | -0.11 | -0.02 | -0.50 | 0.38 | 0.04 | -0.02 | -0.37 | -0.22 | -0.17 | 0.39 | 0.25 | -0.46 | |||||||||||||
MAX | 43.65 | 46.91 | 53.84 | 59.41 | 67.82 | 77.45 | 80.53 | 77.92 | 71.20 | 62.22 | 54.03 | 44.66 | 58.81 | |||||||||||||
MIN | 31.52 | 35.23 | 38.81 | 43.89 | 56.86 | 63.25 | 66.27 | 63.45 | 59.98 | 46.93 | 38.30 | 33.39 | 50.45 | |||||||||||||
YRS | 57 | 58 | 52 | 59 | 55 | 55 | 58 | 55 | 52 | 59 | 59 | 58 | 22 |