YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.77 | q | 33.19 | 33.19 | k | |
1955 | 31.58 | 31.36 | 30.94 | 34.23 | 39.23 | 47.66 | a | 51.26 | 51.90 | 49.07 | 44.55 | 33.46 | b | 33.23 | 39.87 | |||||||||||
1956 | 32.77 | 28.90 | 31.45 | 37.47 | 45.13 | a | 47.63 | 54.84 | 53.29 | 50.40 | 42.39 | 36.20 | 34.42 | 41.24 | ||||||||||||
1957 | 25.94 | 32.93 | 35.90 | 39.70 | 47.84 | 51.43 | 52.16 | 52.10 | 52.47 | 44.39 | 35.97 | 35.06 | 42.16 | |||||||||||||
1958 | 35.45 | 39.36 | 34.23 | 39.20 | 48.52 | 54.63 | 56.68 | 56.39 | 50.37 | 45.87 | 39.00 | 38.68 | 44.86 | |||||||||||||
1959 | 35.61 | 33.82 | 35.42 | 39.07 | 42.39 | 50.63 | 54.16 | 53.23 | 49.63 | 46.00 | 37.60 | 35.42 | 42.75 | |||||||||||||
1960 | 30.42 | 33.83 | 34.32 | 38.50 | 42.03 | 49.70 | 54.84 | 51.65 | 50.52 | a | 45.32 | 38.27 | 34.87 | 42.02 | ||||||||||||
1961 | 36.32 | 36.57 | 36.48 | 38.27 | 44.81 | 52.93 | a | 54.06 | 56.97 | 47.73 | 43.39 | 35.37 | 33.77 | 43.06 | ||||||||||||
1962 | 30.39 | 33.39 | 32.90 | 39.43 | 41.55 | 48.10 | 52.77 | a | 53.19 | 51.83 | 45.19 | 39.87 | 36.39 | 42.08 | ||||||||||||
1963 | 27.71 | 38.75 | 35.03 | 37.45 | a | 44.19 | 49.20 | 51.32 | 54.55 | 54.10 | 46.16 | 39.67 | 34.90 | 42.75 | ||||||||||||
1964 | 34.10 | 32.07 | 33.97 | 36.73 | 41.32 | 48.50 | 53.42 | 52.81 | 48.33 | 45.06 | 36.37 | 33.39 | 41.34 | |||||||||||||
1965 | 33.81 | 34.18 | 34.65 | 40.20 | 41.16 | 48.37 | 54.65 | 55.23 | 47.93 | 47.00 | 42.00 | 32.58 | 42.65 | |||||||||||||
1966 | 32.84 | 33.89 | 34.06 | 39.73 | 43.77 | 48.40 | 52.32 | 53.45 | 51.73 | 43.61 | 40.93 | 36.35 | 42.59 | |||||||||||||
1967 | 36.42 | 34.32 | 34.68 | 36.00 | 43.35 | 51.60 | 54.71 | 57.00 | 52.80 | 45.39 | 40.83 | 33.35 | 43.37 | |||||||||||||
1968 | 31.84 | 38.14 | 37.68 | 37.10 | 43.90 | 50.40 | 55.07 | a | 55.13 | 52.17 | 43.52 | 39.90 | 32.16 | 43.08 | ||||||||||||
1969 | 27.94 | 31.57 | 33.00 | 38.23 | 46.42 | 53.87 | 52.87 | 51.52 | 51.13 | 42.52 | 40.17 | 36.94 | 42.18 | |||||||||||||
1970 | 35.10 | 36.39 | 35.77 | 36.17 | 43.32 | 52.80 | 53.68 | 52.26 | 46.43 | 42.61 | 39.67 | 33.29 | 42.29 | |||||||||||||
1971 | 30.97 | a | 33.32 | 32.23 | 36.27 | 43.00 | 47.47 | 54.23 | a | 56.84 | 48.57 | 41.68 | 37.63 | 32.84 | 41.25 | |||||||||||
1972 | 30.06 | 33.86 | 37.42 | 36.67 | 44.48 | 50.20 | 54.52 | 55.13 | 47.43 | 42.55 | 40.40 | 31.03 | b | 41.98 | ||||||||||||
1973 | 30.45 | 36.82 | 36.13 | 37.93 | 44.90 | 48.73 | 53.10 | 50.94 | 50.27 | 42.90 | 36.31 | a | 37.58 | 42.17 | ||||||||||||
1974 | 29.32 | 34.07 | 34.84 | 39.07 | 42.16 | 49.93 | 53.77 | 54.87 | 52.70 | 43.26 | 40.03 | 36.10 | 42.51 | |||||||||||||
1975 | 34.45 | 33.14 | 34.57 | a | 34.77 | 40.97 | 46.31 | a | 53.45 | 51.10 | a | 50.90 | a | 45.52 | 36.97 | 35.07 | a | 41.43 | ||||||||
1976 | 33.42 | 32.45 | 32.42 | 37.40 | 42.42 | 45.70 | 51.55 | 52.74 | 51.63 | 44.10 | 41.70 | 35.32 | 41.74 | |||||||||||||
1977 | 31.61 | 36.11 | a | 34.55 | 38.90 | a | 41.29 | 50.14 | a | 51.58 | 57.32 | 50.10 | 45.55 | 37.00 | 38.26 | 42.70 | ||||||||||
1978 | 37.68 | 37.04 | 39.77 | 39.37 | 42.48 | 50.97 | 54.06 | 54.39 | 50.80 | 45.84 | 34.07 | 29.81 | 43.02 | |||||||||||||
1979 | 26.74 | 32.96 | 37.06 | 39.55 | a | 44.87 | 48.31 | a | 53.65 | 54.35 | 53.30 | 47.65 | 37.43 | 38.57 | a | 42.87 | ||||||||||
1980 | 31.13 | 36.96 | a | 36.90 | 39.36 | b | 43.00 | a | 47.21 | a | 53.93 | b | 49.86 | b | 49.53 | 45.48 | 41.77 | 37.03 | 42.68 | |||||||
1981 | 37.35 | 36.29 | 37.26 | 40.00 | a | 43.45 | 48.18 | b | 50.10 | b | 56.06 | 50.38 | a | 42.07 | a | 40.07 | 36.27 | a | 43.12 | |||||||
1982 | 32.26 | 32.30 | a | 34.67 | a | 35.57 | b | 42.70 | d | 50.79 | a | 52.30 | a | 53.90 | a | 50.13 | 44.76 | b | 36.43 | 35.48 | 41.77 | |||||
1983 | 35.90 | 38.00 | 39.53 | a | 37.59 | a | 45.74 | 48.14 | b | 51.71 | c | 55.77 | a | 48.59 | a | 44.57 | a | 41.07 | 30.74 | 43.11 | ||||||
1984 | 34.26 | d | 35.04 | a | 39.11 | c | 38.34 | a | 42.10 | b | 47.52 | a | 52.03 | 53.19 | 50.38 | a | 43.84 | 38.27 | 32.10 | 42.18 | ||||||
1985 | 32.16 | 30.59 | a | 33.03 | b | 40.00 | 43.50 | a | 48.55 | a | 55.07 | a | 52.55 | 47.50 | 42.90 | 31.13 | 30.26 | 40.60 | ||||||||
1986 | 37.71 | 36.36 | 40.00 | 37.90 | 44.29 | 52.03 | 50.55 | 55.23 | 47.87 | 45.94 | 39.33 | 35.65 | 43.57 | |||||||||||||
1987 | 32.39 | 36.07 | 37.68 | 40.79 | b | 46.31 | b | 50.07 | b | 52.29 | 52.77 | 50.90 | 45.76 | b | 41.07 | a | 33.77 | 43.32 | ||||||||
1988 | 32.10 | a | 34.36 | a | 35.65 | 39.83 | 42.57 | a | 48.54 | d | 52.50 | a | 52.00 | 49.70 | 50.39 | 39.55 | a | 34.48 | 42.64 | |||||||
1989 | 33.77 | a | 27.04 | c | 35.90 | a | 41.48 | a | 43.69 | b | 49.79 | a | 51.42 | 52.16 | 49.43 | b | 42.74 | ----- | z | 35.03 | a | 42.04 | a | |||
1990 | 35.34 | b | 30.52 | a | 36.58 | 42.14 | a | 43.39 | 49.47 | 55.58 | 55.34 | b | 53.73 | 42.81 | 39.50 | 27.66 | b | 42.67 | ||||||||
1991 | 31.00 | a | 39.70 | a | 35.48 | 38.73 | 42.60 | a | 46.14 | a | 53.65 | 54.94 | 51.53 | 44.30 | a | 41.47 | 37.55 | 43.09 | ||||||||
1992 | 36.65 | 39.52 | 39.97 | 43.23 | 46.97 | 51.79 | b | 53.71 | 53.97 | 49.55 | a | 46.84 | 39.70 | 33.03 | a | 44.58 | ||||||||||
1993 | 29.87 | 31.77 | b | 38.19 | 40.77 | 47.71 | 48.37 | 50.87 | 53.10 | 49.37 | 47.00 | a | 33.47 | 34.87 | a | 42.11 | ||||||||||
1994 | 36.81 | 33.61 | 36.68 | 41.17 | 45.83 | a | 47.67 | 53.16 | 52.58 | 51.97 | 43.80 | a | 33.73 | 34.37 | a | 42.61 | ||||||||||
1995 | 37.39 | 37.63 | a | 36.06 | 38.97 | 45.70 | a | 48.30 | 54.81 | 51.53 | a | 53.70 | 44.90 | 42.52 | a | 37.16 | 44.06 | |||||||||
1996 | 35.52 | 32.17 | 36.39 | 40.13 | 42.29 | 47.70 | 54.57 | a | 53.90 | a | 48.90 | 44.65 | 38.79 | a | 34.65 | 42.47 | ||||||||||
1997 | 34.16 | 34.82 | 36.29 | 39.17 | 47.28 | b | 48.70 | 53.10 | 55.55 | 52.40 | 45.29 | 42.47 | 35.39 | 43.72 | ||||||||||||
1998 | 36.52 | 37.00 | 37.84 | 39.47 | 44.84 | 50.17 | 56.26 | 55.10 | 52.93 | 44.71 | 40.60 | 31.90 | 43.94 | |||||||||||||
1999 | 34.94 | 34.25 | 34.97 | 36.97 | 41.13 | a | 48.13 | 51.52 | 54.93 | a | 48.77 | 44.27 | a | 42.13 | 35.70 | a | 42.31 | |||||||||
2000 | 33.35 | 36.34 | 35.61 | 40.97 | 44.32 | 49.34 | a | 51.59 | b | 51.74 | 50.90 | 45.31 | b | 35.83 | 35.58 | 42.57 | ||||||||||
2001 | 35.21 | b | 34.29 | 37.35 | 38.21 | a | 43.55 | 46.60 | 51.39 | 52.45 | 48.59 | a | 41.39 | 37.87 | 33.52 | b | 41.70 | |||||||||
2002 | 34.23 | 33.22 | a | 33.06 | 38.13 | 40.23 | 49.96 | b | 52.77 | 51.83 | a | 50.59 | a | 42.33 | a | 38.21 | a | 36.39 | 41.75 | |||||||
2003 | 37.87 | a | 33.21 | 38.71 | 38.50 | b | 44.23 | a | 49.41 | a | 52.74 | 54.32 | 51.79 | a | 47.00 | a | 35.04 | b | 35.63 | a | 43.21 | |||||
2004 | 33.10 | 35.82 | a | 37.83 | a | 40.50 | 45.83 | b | 49.33 | 54.23 | 56.23 | 50.50 | 45.50 | a | 38.20 | 36.87 | 43.66 | |||||||||
2005 | 33.58 | 32.93 | 37.37 | a | 39.79 | a | 46.13 | a | 47.38 | a | 53.53 | a | 52.94 | 46.48 | a | 45.20 | a | 35.79 | a | 32.55 | 41.97 | |||||
2006 | 34.77 | a | 30.89 | a | 33.23 | 37.71 | b | 43.66 | b | 50.14 | a | 53.58 | 50.40 | a | 48.20 | 41.50 | a | 37.00 | a | 32.35 | 41.12 | |||||
2007 | 28.52 | b | 33.25 | 35.08 | e | 37.61 | b | 42.50 | a | ----- | z | 51.89 | c | 50.43 | a | 46.40 | 41.00 | c | 35.38 | a | 32.35 | 39.49 | a | |||
2008 | 28.00 | d | 31.50 | a | 30.61 | c | 32.66 | a | 40.76 | b | 43.93 | a | 50.65 | 52.28 | b | 48.00 | a | 43.00 | c | 39.48 | a | 30.88 | f | 40.08 | a | |
2009 | 31.13 | a | 30.20 | c | 32.83 | b | 35.72 | a | 41.68 | c | 49.45 | a | 54.35 | ----- | z | 50.37 | 41.42 | 35.60 | 27.84 | 39.14 | a | |||||
2010 | ----- | z | 35.21 | 33.74 | 35.67 | 39.45 | 46.30 | 51.33 | a | 50.65 | 49.27 | 42.03 | 35.17 | 33.06 | 41.08 | a | ||||||||||
2011 | 29.90 | 29.14 | 30.68 | 31.77 | 37.87 | 45.77 | 48.48 | 51.06 | 50.07 | 42.81 | 34.10 | 29.10 | 38.40 | |||||||||||||
2012 | 30.42 | 31.69 | 30.32 | 36.17 | 39.26 | 43.33 | 49.84 | 50.65 | 47.37 | 40.65 | 36.57 | 31.58 | 38.99 | |||||||||||||
2013 | 26.45 | 31.14 | 33.48 | d | 36.63 | 42.73 | a | 49.40 | 52.97 | 55.23 | 49.47 | 40.26 | 33.07 | a | 27.72 | b | 39.88 | |||||||||
2014 | 29.97 | 30.96 | a | 35.87 | 38.10 | 44.90 | 47.97 | 56.39 | 59.00 | 51.97 | 49.16 | 39.27 | 38.35 | 43.49 | ||||||||||||
2015 | 36.81 | 40.14 | 40.10 | 39.03 | 47.74 | 53.03 | 56.97 | 56.48 | 50.73 | 48.58 | 38.93 | a | 36.19 | 45.40 | ||||||||||||
2016 | 36.45 | 38.28 | 38.71 | 43.93 | 47.26 | 51.67 | 54.39 | 54.74 | 50.00 | 47.29 | 44.00 | 31.48 | 44.85 | |||||||||||||
2017 | 29.84 | 34.75 | 38.13 | 39.73 | 45.35 | 51.73 | 56.19 | 59.52 | 57.70 | t | 45.17 | b | 44.00 | x | 35.94 | 43.64 | b | |||||||||
2018 | 37.93 | a | 32.44 | s | 36.03 | 41.63 | 49.63 | a | 50.73 | 57.61 | 59.03 | b | 50.13 | 46.16 | 43.20 | 37.97 | 46.37 | a | ||||||||
2019 | 37.58 | 31.85 | a | 35.74 | 46.20 | 47.94 | 50.97 | 55.07 | a | 57.06 | 52.60 | 41.14 | b | 39.47 | 37.06 | 44.39 | ||||||||||
2020 | 36.23 | 35.21 | 35.35 | 40.93 | 47.19 | 52.66 | a | 57.65 | 56.39 | 55.87 | 47.03 | 39.17 | 37.57 | a | 45.10 | |||||||||||
2021 | 37.42 | 34.61 | 35.61 | 39.00 | 45.67 | a | 55.20 | 57.74 | 57.68 | 50.73 | 45.26 | 41.70 | 35.71 | 44.69 | ||||||||||||
2022 | 33.52 | 33.32 | 38.42 | 36.37 | 42.58 | 50.70 | 57.39 | 59.52 | 55.83 | 49.42 | 35.73 | 32.81 | 43.80 | |||||||||||||
2023 | 35.61 | 31.68 | 32.94 | 37.43 | 47.74 | 50.33 | 57.03 | 59.26 | 52.47 | 46.55 | 41.00 | 37.81 | 44.15 | |||||||||||||
2024 | 33.71 | 37.00 | 36.62 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.78 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.21 | 34.20 | 35.59 | 38.57 | 43.90 | 49.36 | 53.53 | 54.14 | 50.41 | 44.55 | 38.35 | 34.36 | 42.61 | |||||||||||||
S.D. | 3.15 | 2.78 | 2.39 | 2.38 | 2.48 | 2.30 | 2.03 | 2.44 | 2.08 | 2.17 | 2.80 | 2.66 | 1.37 | |||||||||||||
SKEW | -0.39 | 0.06 | -0.16 | 0.07 | 0.05 | 0.08 | 0.15 | 0.41 | 0.31 | 0.26 | -0.30 | -0.61 | -0.57 | |||||||||||||
MAX | 37.93 | 40.14 | 40.10 | 46.20 | 49.63 | 55.20 | 57.74 | 59.52 | 55.87 | 50.39 | 44.00 | 38.68 | 45.40 | |||||||||||||
MIN | 25.94 | 27.04 | 30.32 | 31.77 | 37.87 | 43.33 | 48.48 | 49.86 | 46.40 | 40.26 | 31.13 | 27.66 | 38.40 | |||||||||||||
YRS | 69 | 69 | 70 | 69 | 69 | 68 | 69 | 68 | 68 | 69 | 67 | 69 | 62 |