YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.29 | m | 46.35 | 37.50 | 36.39 | 40.08 | i | |||
1956 | 36.29 | 30.66 | 35.19 | 41.13 | 47.55 | 49.07 | 54.87 | 53.45 | 49.70 | 43.77 | 36.63 | 36.50 | a | 42.90 | ||||||||||||
1957 | 28.03 | 35.93 | 39.77 | 42.67 | 48.48 | 51.57 | 51.52 | 51.19 | 53.45 | a | 46.29 | 38.33 | 37.13 | 43.70 | ||||||||||||
1958 | 36.71 | 43.00 | 37.35 | 41.67 | 49.10 | 53.97 | 57.32 | 55.23 | 50.53 | 46.06 | 41.27 | 41.97 | 46.18 | |||||||||||||
1959 | 39.19 | 35.36 | 38.26 | 41.47 | 44.13 | 51.55 | a | 54.00 | a | 52.39 | 50.47 | 48.26 | 38.93 | a | 36.58 | 44.21 | ||||||||||
1960 | 34.26 | 36.86 | 39.97 | 42.03 | 45.23 | 48.87 | 54.32 | 52.00 | 50.03 | 45.93 | a | 39.90 | 35.45 | 43.74 | ||||||||||||
1961 | 37.23 | a | 40.54 | 39.40 | a | 41.03 | 46.48 | 52.07 | 54.19 | 55.52 | 48.43 | 44.71 | 35.90 | 36.84 | 44.36 | |||||||||||
1962 | 31.83 | a | 35.71 | 36.94 | 42.70 | 43.81 | 48.13 | 51.71 | 52.77 | 51.23 | 45.87 | 42.57 | 37.45 | 43.39 | ||||||||||||
1963 | 27.61 | 42.57 | 38.87 | 40.70 | 45.48 | 49.70 | 51.35 | 53.29 | 55.13 | 47.52 | 41.70 | ----- | z | 44.90 | a | |||||||||||
1964 | 36.97 | 34.38 | 37.16 | 38.97 | 42.23 | 49.13 | 52.87 | 52.65 | 48.33 | 46.00 | 38.97 | 36.81 | 42.87 | |||||||||||||
1965 | 36.10 | 36.57 | 37.97 | 42.53 | 43.26 | 48.60 | 53.77 | 54.71 | 48.63 | 49.16 | 44.70 | 35.32 | 44.28 | |||||||||||||
1966 | 36.39 | 36.11 | 38.03 | 42.23 | 44.35 | 49.23 | 52.61 | 52.10 | 51.70 | 45.32 | 42.63 | 39.32 | 44.17 | |||||||||||||
1967 | 38.61 | 36.89 | 37.06 | 37.93 | 44.42 | 52.60 | 53.06 | 55.61 | 51.27 | 47.13 | 40.50 | 35.26 | 44.20 | |||||||||||||
1968 | 35.48 | 39.55 | 40.32 | 40.17 | 44.97 | 50.83 | 54.48 | 54.52 | 51.47 | 44.45 | 42.33 | 35.68 | 44.52 | |||||||||||||
1969 | 32.94 | 34.79 | 36.65 | 41.43 | 48.00 | 52.83 | 52.60 | a | 50.16 | 49.47 | 44.20 | a | 40.37 | 38.97 | a | 43.53 | ||||||||||
1970 | 38.42 | 38.61 | 39.83 | b | 37.67 | 44.58 | 51.93 | 52.71 | 50.42 | 48.37 | 43.87 | 41.10 | 35.26 | 43.56 | ||||||||||||
1971 | 32.77 | 35.93 | 36.19 | 39.40 | 44.42 | 47.50 | 53.68 | 55.06 | 48.10 | 43.26 | 39.13 | 34.61 | 42.51 | |||||||||||||
1972 | 33.13 | 36.55 | 40.90 | 38.57 | 45.16 | 49.60 | 54.23 | 54.29 | 47.37 | 43.84 | 42.13 | 31.10 | 43.07 | |||||||||||||
1973 | 33.45 | 38.07 | 37.87 | a | 41.37 | 46.26 | 51.47 | 52.77 | 50.58 | 51.80 | 45.35 | 38.97 | 39.45 | 43.95 | ||||||||||||
1974 | 30.74 | 35.04 | 36.48 | f | 39.86 | a | 43.55 | 49.50 | 53.26 | 54.29 | 51.13 | 42.77 | 41.34 | a | 38.52 | 43.64 | a | |||||||||
1975 | 37.35 | 36.21 | 35.81 | 37.24 | a | 46.80 | a | 47.83 | 54.48 | 52.35 | 49.50 | 46.52 | 39.33 | 37.45 | 43.41 | |||||||||||
1976 | 35.50 | a | 34.28 | 36.10 | 39.83 | 43.63 | a | 45.73 | 52.63 | a | 53.58 | 50.85 | c | 44.65 | 41.63 | 33.42 | 42.65 | |||||||||
1977 | 30.90 | 37.21 | 36.13 | 40.47 | 42.32 | 49.17 | 49.68 | 55.97 | 48.93 | 44.29 | 38.34 | a | 39.83 | a | 42.77 | |||||||||||
1978 | 39.42 | 39.85 | a | 41.45 | 41.33 | 44.48 | 52.73 | 54.00 | 54.00 | 50.17 | 44.65 | 34.33 | 30.68 | 43.92 | ||||||||||||
1979 | 25.19 | 36.04 | 40.03 | 42.57 | 45.19 | 48.60 | 53.19 | 53.00 | 52.37 | 48.13 | a | 39.28 | a | 39.47 | a | 43.59 | ||||||||||
1980 | 30.94 | 37.56 | b | 37.68 | 42.47 | 44.47 | a | 49.41 | a | 53.77 | a | 50.00 | a | 48.57 | 45.33 | a | 41.57 | 38.07 | a | 43.32 | ||||||
1981 | 36.30 | a | 36.46 | 39.10 | 41.37 | 45.48 | 49.83 | 52.13 | a | 54.35 | 50.00 | a | 43.97 | 41.34 | a | 38.52 | 44.07 | |||||||||
1982 | 33.10 | 34.79 | 37.17 | a | 38.00 | 42.41 | b | 51.33 | 51.63 | a | 52.87 | 50.03 | 46.03 | 37.14 | a | 35.30 | a | 42.48 | ||||||||
1983 | 37.74 | 40.14 | 42.23 | 40.37 | 45.57 | a | 48.73 | 53.52 | 55.16 | 48.03 | 45.84 | 42.17 | 33.97 | 44.46 | ||||||||||||
1984 | 35.03 | 37.26 | b | 41.73 | a | 40.17 | 43.94 | 47.73 | 51.74 | 53.10 | 48.60 | 44.45 | 40.25 | b | 32.71 | 43.06 | ||||||||||
1985 | 30.35 | 33.85 | b | 34.74 | 42.50 | 44.37 | a | 49.13 | 54.87 | 52.58 | 48.23 | 43.37 | a | 33.43 | 28.84 | 41.36 | ||||||||||
1986 | 37.90 | a | 38.04 | 41.58 | 40.23 | 45.34 | b | 52.60 | 51.42 | 55.26 | 48.97 | 47.39 | 41.37 | 36.32 | 44.70 | |||||||||||
1987 | 33.71 | 37.71 | 40.13 | 43.33 | 48.16 | 50.17 | 53.24 | b | 52.32 | 50.80 | 44.06 | 42.07 | a | 35.42 | 44.26 | |||||||||||
1988 | 34.24 | b | 35.39 | a | 38.17 | a | 42.03 | 43.97 | 49.03 | 53.33 | a | 51.35 | 48.30 | 49.61 | 42.50 | 34.58 | 43.54 | |||||||||
1989 | 35.43 | a | 28.57 | 39.06 | 43.87 | 45.77 | 50.50 | 52.74 | 53.23 | 51.67 | 45.50 | a | 41.27 | 34.07 | a | 43.47 | ||||||||||
1990 | 36.90 | 33.71 | 39.97 | a | 44.27 | 44.81 | 50.30 | 56.23 | 56.13 | a | 52.79 | a | 44.81 | 40.72 | a | 28.35 | 44.08 | |||||||||
1991 | 32.27 | a | 40.81 | a | 37.23 | 40.77 | 43.03 | 47.38 | a | 54.00 | 53.80 | a | 50.10 | 44.27 | a | 43.17 | 37.45 | 43.69 | ||||||||
1992 | 38.47 | a | 40.69 | 42.42 | 45.57 | 48.19 | 52.80 | 55.00 | b | 53.81 | 50.97 | 48.00 | 39.97 | a | 34.77 | 45.89 | ||||||||||
1993 | 30.74 | 33.37 | a | 41.77 | 43.23 | 48.19 | 49.90 | 51.37 | a | 53.39 | 50.57 | 47.83 | a | 34.03 | 34.39 | 43.23 | ||||||||||
1994 | 36.43 | a | 34.52 | a | 39.90 | 42.97 | a | 47.27 | a | 48.70 | 54.13 | 52.26 | 53.67 | 44.71 | c | 35.31 | a | 36.16 | 43.84 | |||||||
1995 | 37.32 | 39.93 | a | 38.97 | 41.03 | 46.16 | 49.48 | a | 55.29 | 51.03 | a | 54.53 | 45.40 | a | 44.27 | 38.90 | 45.19 | |||||||||
1996 | 37.40 | a | 34.72 | 39.16 | 44.00 | 44.23 | 48.57 | 55.90 | 53.52 | 49.43 | 46.74 | 41.00 | 37.93 | a | 44.38 | |||||||||||
1997 | 35.24 | b | 36.75 | 39.17 | b | 42.27 | 49.16 | 50.38 | a | 54.03 | 55.03 | 53.93 | b | 46.10 | a | 44.13 | 34.69 | b | 45.07 | |||||||
1998 | 40.13 | 39.93 | a | 40.03 | a | 42.30 | 46.39 | 50.40 | 56.52 | 53.48 | 52.07 | a | 46.39 | 42.63 | 34.29 | 45.38 | ||||||||||
1999 | 36.67 | a | 37.54 | 36.55 | 39.67 | 42.45 | 48.83 | 51.55 | 55.45 | 48.76 | a | 43.97 | b | 43.80 | 36.13 | 43.45 | ||||||||||
2000 | 34.38 | b | 38.21 | a | 36.29 | 42.07 | a | 45.81 | 50.00 | 52.10 | 50.84 | 51.07 | 44.32 | 36.37 | 36.35 | 43.15 | ||||||||||
2001 | 35.48 | 34.11 | 39.00 | 39.17 | 43.90 | 47.47 | 52.26 | 53.68 | 50.50 | 44.59 | b | 42.37 | 36.13 | 43.22 | ||||||||||||
2002 | 35.71 | 36.00 | 35.90 | 40.50 | 43.06 | 49.43 | 53.39 | 50.52 | 50.50 | 43.61 | 40.80 | 38.29 | 43.14 | |||||||||||||
2003 | 39.70 | a | 36.70 | a | 41.29 | 40.07 | 43.77 | 49.70 | 52.03 | a | 52.61 | c | 51.03 | 47.30 | a | 35.71 | b | 37.23 | 43.93 | |||||||
2004 | 36.16 | 35.41 | 37.58 | 40.48 | a | 45.23 | 50.36 | b | 54.23 | a | 55.37 | a | 49.90 | 46.72 | b | 38.07 | a | 36.87 | 43.87 | |||||||
2005 | 35.80 | a | 33.00 | d | 40.48 | 41.60 | 48.23 | 49.10 | a | 54.39 | 52.70 | a | 47.24 | i | 48.23 | a | 37.83 | a | 35.87 | a | 43.38 | a | ||||
2006 | 38.67 | a | 35.11 | a | 36.76 | b | 40.83 | 45.10 | a | 51.60 | e | 53.86 | c | 50.86 | b | 50.07 | b | 44.26 | 42.48 | a | 37.21 | b | 43.90 | |||
2007 | 33.03 | 39.12 | c | 41.54 | c | 42.10 | 44.45 | b | 50.00 | f | 56.81 | e | 53.77 | a | 50.70 | c | 45.27 | e | 39.57 | 36.90 | b | 43.93 | a | |||
2008 | 33.77 | 36.82 | a | 37.14 | c | 38.86 | a | 47.07 | c | 48.07 | b | 53.37 | d | 54.13 | a | 49.25 | f | 46.48 | 44.37 | 34.41 | b | 43.14 | a | |||
2009 | 34.20 | a | 36.69 | b | 37.10 | 40.50 | d | 45.86 | c | 51.96 | f | 56.19 | 53.58 | 52.52 | a | 46.42 | 41.52 | a | 32.32 | 43.35 | a | |||||
2010 | 42.50 | a | 41.79 | 39.31 | b | 41.07 | a | 44.48 | 50.34 | a | 52.33 | d | 53.57 | a | 53.97 | 47.52 | 41.24 | a | 38.96 | c | 45.59 | |||||
2011 | 37.97 | 35.07 | 40.19 | 39.17 | 44.25 | c | 49.70 | 53.53 | a | 55.06 | 54.63 | 48.68 | 41.03 | a | 34.13 | a | 44.45 | |||||||||
2012 | 36.47 | a | 37.59 | 37.13 | a | 43.63 | 44.45 | 50.04 | c | 53.71 | 54.65 | 49.77 | 46.27 | a | 43.90 | 38.10 | 44.64 | |||||||||
2013 | 32.42 | 36.96 | 40.39 | 43.90 | 47.30 | a | 52.66 | a | 54.61 | 56.68 | 54.81 | c | 45.06 | 40.63 | 30.90 | 44.69 | ||||||||||
2014 | 35.45 | 37.43 | 41.77 | 43.23 | 48.74 | 50.90 | 57.74 | 57.58 | 54.03 | 52.65 | 42.47 | 41.29 | 46.94 | |||||||||||||
2015 | 38.84 | 41.21 | 44.35 | 41.50 | 48.58 | 53.70 | 57.16 | 56.03 | 50.47 | 51.00 | 39.77 | 39.26 | 46.82 | |||||||||||||
2016 | 39.23 | 42.14 | 41.48 | 45.93 | 48.29 | 50.83 | 54.00 | 55.26 | 50.83 | 50.19 | 46.90 | 34.27 | a | 46.61 | ||||||||||||
2017 | 33.58 | 37.64 | 41.16 | 41.83 | 46.61 | 50.97 | 53.06 | 56.16 | 54.93 | 45.37 | a | 42.30 | 32.97 | 44.72 | ||||||||||||
2018 | 38.81 | 35.79 | 38.19 | 42.17 | 47.71 | 49.60 | 53.84 | 55.35 | 49.70 | 47.29 | 40.67 | 38.03 | 44.76 | |||||||||||||
2019 | 36.55 | b | 34.38 | b | 36.77 | a | 44.17 | 48.10 | 50.47 | 54.65 | 56.06 | 54.73 | 43.52 | 39.80 | 39.13 | 44.86 | ||||||||||
2020 | 40.74 | 36.83 | 37.87 | 43.43 | 47.71 | 52.37 | 54.45 | 53.74 | 54.70 | 47.58 | 40.20 | 38.19 | 45.65 | |||||||||||||
2021 | 39.58 | 38.07 | 37.06 | 40.00 | 45.65 | 53.90 | 55.61 | 55.58 | 51.93 | 46.68 | 43.93 | 37.74 | 45.48 | |||||||||||||
2022 | 36.00 | 35.04 | 41.45 | 39.37 | 44.94 | 51.00 | 56.19 | 56.74 | 52.43 | 49.81 | 37.30 | 35.48 | 44.65 | |||||||||||||
2023 | 36.61 | 34.11 | 35.52 | 40.43 | 48.26 | 49.27 | 53.94 | 58.10 | 52.17 | 48.39 | 40.90 | 41.19 | 44.91 | |||||||||||||
2024 | 38.90 | 39.66 | 39.81 | 40.93 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.45 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 35.53 | 36.86 | 38.82 | 41.34 | 45.60 | 50.13 | 53.75 | 53.76 | 50.97 | 46.08 | 40.44 | 36.20 | 44.14 | |||||||||||||
S.D. | 3.24 | 2.68 | 2.10 | 1.83 | 1.88 | 1.72 | 1.61 | 1.86 | 2.04 | 2.00 | 2.70 | 2.74 | 1.09 | |||||||||||||
SKEW | -0.71 | -0.01 | 0.20 | 0.06 | 0.23 | 0.24 | 0.31 | -0.08 | 0.46 | 0.85 | -0.52 | -0.56 | 0.46 | |||||||||||||
MAX | 42.50 | 43.00 | 44.35 | 45.93 | 49.16 | 53.97 | 57.74 | 58.10 | 55.13 | 52.65 | 46.90 | 41.97 | 46.94 | |||||||||||||
MIN | 25.19 | 28.57 | 34.74 | 37.24 | 42.23 | 45.73 | 49.68 | 50.00 | 47.37 | 42.77 | 33.43 | 28.35 | 41.36 | |||||||||||||
YRS | 69 | 69 | 68 | 68 | 68 | 66 | 68 | 68 | 66 | 69 | 69 | 68 | 62 |