| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.40 | 69.16 | 61.62 | ----- | z | 33.85 | 25.84 | 52.57 | g | |||||
| 1949 | 6.50 | 24.41 | 41.15 | 53.08 | 57.90 | 66.85 | 74.39 | 70.73 | 64.35 | 47.58 | 42.28 | 27.56 | 48.07 | |||||||||||||
| 1950 | 27.53 | 35.48 | 38.76 | 49.23 | 56.82 | 64.52 | 75.68 | 72.24 | 63.70 | c | 55.18 | 45.47 | 38.11 | 51.89 | ||||||||||||
| 1951 | 34.53 | 38.43 | 41.45 | 54.63 | 59.29 | 68.90 | 75.48 | 71.60 | 66.15 | 48.74 | 39.67 | 29.10 | 52.33 | |||||||||||||
| 1952 | 30.94 | 37.14 | 36.24 | 52.77 | 59.06 | 62.15 | 75.61 | 71.24 | 66.05 | 58.00 | 35.55 | 32.66 | 51.45 | |||||||||||||
| 1953 | 38.02 | 37.59 | 43.11 | 49.20 | 51.76 | 63.52 | 76.66 | 69.76 | 67.60 | 52.24 | 43.30 | 31.55 | 52.03 | |||||||||||||
| 1954 | 33.84 | 40.82 | 39.24 | 54.20 | 62.27 | 63.00 | 75.18 | 68.18 | 60.85 | 51.89 | 42.35 | 30.44 | 51.85 | |||||||||||||
| 1955 | 27.23 | 31.82 | 39.60 | 44.22 | 55.73 | 66.83 | 70.65 | 73.82 | 63.77 | 55.65 | 36.95 | 35.08 | 50.11 | |||||||||||||
| 1956 | 33.87 | 29.34 | 41.02 | 49.57 | 58.92 | 66.93 | 75.74 | 69.71 | 64.08 | 49.94 | 33.98 | 27.89 | 50.08 | |||||||||||||
| 1957 | 24.39 | 39.95 | 42.94 | 48.42 | 57.35 | 69.27 | 72.08 | 67.74 | 63.72 | 49.23 | 35.18 | 32.48 | 50.23 | |||||||||||||
| 1958 | 32.52 | 41.93 | 37.90 | 48.15 | 63.69 | 67.70 | 74.50 | 77.29 | 63.67 | 54.32 | 38.67 | 34.66 | 52.92 | |||||||||||||
| 1959 | 33.16 | 34.12 | 42.73 | 51.83 | 53.56 | 69.82 | 77.23 | 71.47 | 60.15 | 52.52 | 36.57 | 26.94 | 50.84 | |||||||||||||
| 1960 | 27.79 | 32.28 | 44.94 | 48.38 | 55.71 | 71.58 | 76.42 | 69.82 | 64.33 | 50.16 | 38.47 | 29.65 | 50.79 | |||||||||||||
| 1961 | 29.08 | 37.04 | 41.48 | 48.57 | 56.26 | 73.92 | 75.68 | 74.48 | 59.55 | 50.77 | 33.45 | 30.81 | 50.92 | |||||||||||||
| 1962 | 23.06 | 33.14 | 38.56 | 53.08 | 55.35 | 67.00 | 73.06 | 70.44 | 63.42 | 53.65 | 39.67 | 31.11 | 50.13 | |||||||||||||
| 1963 | 22.55 | 42.64 | 39.08 | 42.60 | 60.18 | 61.95 | 71.06 | 70.66 | 66.21 | a | 55.40 | 39.28 | 31.81 | 50.29 | ||||||||||||
| 1964 | 31.03 | 30.34 | 36.81 | 46.20 | 54.53 | 63.22 | 74.60 | 70.21 | 59.70 | 55.29 | 36.02 | 35.21 | 49.43 | |||||||||||||
| 1965 | 33.56 | 34.30 | 39.73 | 50.00 | 54.00 | 64.75 | 73.23 | 70.06 | 58.48 | 53.58 | 41.83 | 30.74 | 50.36 | |||||||||||||
| 1966 | 30.00 | 32.14 | 43.56 | 50.50 | 62.87 | 65.22 | 71.19 | 73.32 | 63.47 | 50.90 | 41.20 | 30.24 | 51.22 | |||||||||||||
| 1967 | 32.79 | 37.00 | 39.89 | 39.83 | 57.34 | 64.40 | 76.27 | 77.74 | 67.33 | 52.84 | 43.00 | 26.53 | 51.25 | |||||||||||||
| 1968 | 28.48 | 43.14 | 43.00 | 47.12 | 58.11 | 69.43 | 77.27 | 67.61 | 62.92 | 50.98 | 39.10 | 28.98 | 51.35 | |||||||||||||
| 1969 | 33.68 | 33.16 | 40.24 | 49.65 | 62.85 | 66.58 | 76.31 | 74.11 | 66.28 | 45.32 | 37.87 | 32.56 | 51.55 | |||||||||||||
| 1970 | 34.50 | 40.25 | 39.52 | 43.03 | 58.65 | 67.18 | 76.87 | 75.42 | 58.90 | 47.95 | 41.63 | 29.50 | 51.12 | |||||||||||||
| 1971 | 33.00 | 35.16 | 40.40 | 48.07 | 54.61 | 65.85 | 77.34 | 77.03 | 59.13 | 46.77 | 36.10 | 25.35 | 49.90 | |||||||||||||
| 1972 | 25.89 | 37.60 | 46.85 | 47.58 | 60.69 | 70.07 | 76.87 | 73.95 | 61.58 | 49.85 | 37.02 | 23.45 | 50.95 | |||||||||||||
| 1973 | 24.56 | 38.21 | 39.66 | 48.05 | 63.45 | 69.15 | 75.73 | 72.39 | 60.52 | 49.52 | 39.55 | 35.34 | 51.34 | |||||||||||||
| 1974 | 29.50 | 33.34 | 44.85 | 46.83 | 60.71 | 70.38 | 73.82 | 71.44 | 65.17 | 51.79 | 38.90 | 30.06 | 51.40 | |||||||||||||
| 1975 | 29.63 | 35.32 | 39.63 | 41.92 | 56.65 | 65.48 | 77.08 | 68.79 | 67.05 | 49.55 | 35.30 | 32.08 | 49.87 | |||||||||||||
| 1976 | 29.95 | 36.22 | 38.24 | 47.10 | 62.66 | 65.43 | 74.47 | 66.81 | 64.38 | 51.26 | 41.23 | 26.69 | 50.37 | |||||||||||||
| 1977 | 28.55 | 38.04 | 37.63 | 51.97 | 52.10 | 72.02 | 74.82 | 74.15 | 62.80 | 53.85 | 40.42 | 36.90 | 51.94 | |||||||||||||
| 1978 | 35.44 | 37.48 | 47.81 | 47.92 | 55.60 | 65.50 | 75.50 | 71.53 | 59.27 | 55.31 | 36.15 | 19.15 | 50.55 | |||||||||||||
| 1979 | 25.56 | 35.39 | 44.53 | 48.40 | 60.69 | 68.28 | 74.90 | 71.16 | 67.30 | 55.85 | 35.82 | 32.06 | 51.66 | |||||||||||||
| 1980 | 33.65 | 40.60 | 38.73 | 51.38 | 57.05 | 63.78 | 74.90 | 70.37 | 63.32 | 52.44 | 40.43 | 32.90 | 51.63 | |||||||||||||
| 1981 | 34.52 | 38.27 | 42.32 | 53.18 | 58.40 | 71.63 | 74.95 | 74.71 | 67.13 | 48.06 | 42.73 | 37.73 | 53.64 | |||||||||||||
| 1982 | 17.45 | 37.36 | 40.60 | 47.47 | 58.48 | 65.20 | b | 74.81 | 74.60 | 61.90 | 49.98 | 36.85 | 31.37 | 49.67 | ||||||||||||
| 1983 | 34.98 | f | 41.38 | h | 44.72 | h | 46.33 | i | 57.25 | i | 66.34 | h | 70.30 | k | 72.87 | h | 65.89 | h | 54.19 | j | 41.35 | j | 36.85 | e | 36.85 | k |
| 1984 | 28.00 | 37.06 | c | 44.00 | a | 47.69 | a | 58.19 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.19 | h | |
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1988 | ----- | z | ----- | z | ----- | z | 51.50 | 57.24 | 68.35 | 77.37 | 74.37 | 61.65 | 56.68 | 38.90 | 26.11 | 56.91 | c | |||||||||
| 1989 | 24.55 | 26.21 | 44.37 | 54.40 | 57.92 | a | 67.72 | 74.63 | 69.81 | 62.28 | 49.76 | 38.07 | 29.47 | 49.93 | ||||||||||||
| 1990 | 30.03 | 30.16 | 43.34 | 54.72 | 56.06 | 66.88 | 75.26 | 70.97 | 64.92 | 50.58 | 35.25 | 18.31 | 49.71 | |||||||||||||
| 1991 | 24.66 | 39.39 | 38.87 | 45.13 | 52.08 | 64.00 | 76.98 | 73.15 | 66.20 | 54.63 | 39.03 | 28.47 | 50.22 | |||||||||||||
| 1992 | 30.48 | 40.33 | 45.84 | 56.07 | 65.77 | 67.55 | 72.48 | 73.16 | 63.50 | 53.82 | 34.82 | 26.03 | 52.49 | |||||||||||||
| 1993 | 20.52 | 31.77 | 48.50 | 49.77 | 61.52 | 62.93 | 69.58 | 70.27 | 62.90 | 51.65 | 33.45 | 30.08 | 49.41 | |||||||||||||
| 1994 | 30.73 | 33.54 | 45.29 | 50.93 | 60.42 | 69.22 | 77.82 | 74.30 | h | ----- | z | 48.16 | i | 33.40 | 31.08 | 48.05 | c | |||||||||
| 1995 | 37.24 | 43.77 | 42.73 | 47.48 | 55.89 | 63.27 | 73.40 | 72.32 | 65.65 | 51.92 | 44.40 | 35.47 | 52.79 | |||||||||||||
| 1996 | 35.74 | 39.45 | 43.42 | 51.27 | 58.47 | 69.10 | 77.85 | 74.24 | 62.05 | 51.31 | 40.13 | 34.40 | 53.12 | |||||||||||||
| 1997 | 33.69 | 37.00 | 46.18 | 49.33 | 64.44 | 65.33 | 72.68 | 73.24 | 64.30 | 50.50 | 40.50 | 28.85 | 52.17 | |||||||||||||
| 1998 | 35.68 | 37.61 | 42.81 | 47.55 | 52.68 | 63.85 | 76.81 | 74.29 | 65.43 | 48.60 | 39.95 | 27.37 | 51.05 | |||||||||||||
| 1999 | 33.80 | a | 37.71 | 42.06 | 46.33 | 57.23 | 67.78 | 73.98 | 70.24 | 64.70 | 52.60 | 42.87 | 29.19 | 51.54 | ||||||||||||
| 2000 | 35.06 | 41.03 | 44.24 | 54.43 | 60.50 | 71.25 | 73.92 | 73.34 | 62.72 | 50.66 | 35.07 | 30.31 | 52.71 | |||||||||||||
| 2001 | 27.85 | a | 33.09 | 45.47 | 47.38 | 64.93 | a | 68.53 | 73.13 | 73.26 | 64.15 | 52.61 | 39.73 | 36.29 | 52.20 | |||||||||||
| 2002 | 31.19 | 36.16 | 38.74 | 50.28 | 56.66 | 68.82 | 76.71 | 69.90 | 62.38 | 47.74 | 36.55 | a | 32.50 | 50.64 | ||||||||||||
| 2003 | 38.29 | 32.66 | 43.47 | 45.12 | 59.66 | 69.72 | 77.40 | 72.44 | 63.88 | 54.61 | 34.02 | 32.05 | 51.94 | |||||||||||||
| 2004 | 30.48 | 35.22 | 48.26 | 51.97 | 58.44 | 68.98 | 75.89 | 71.84 | 61.82 | 50.00 | 37.33 | 31.45 | a | 51.81 | ||||||||||||
| 2005 | 26.84 | 37.80 | 46.48 | 50.68 | 60.95 | 65.17 | 81.71 | 76.98 | 61.62 | 53.34 | 42.23 | 34.52 | 53.19 | |||||||||||||
| 2006 | 37.13 | 37.46 | 39.24 | 52.88 | 63.15 | 73.97 | 81.82 | 73.45 | 64.53 | 51.32 | 39.77 | 30.02 | 53.73 | |||||||||||||
| 2007 | 27.39 | 38.38 | 48.06 | 52.28 | 63.19 | 71.72 | 80.69 | 75.24 | 63.00 | 50.79 | 40.98 | 31.03 | 53.56 | |||||||||||||
| 2008 | 30.42 | 39.12 | 43.35 | 48.55 | 60.11 | 70.02 | 77.90 | 77.16 | 65.83 | 52.95 | 44.42 | 30.05 | 53.32 | |||||||||||||
| 2009 | 34.19 | 39.18 | 42.74 | 49.10 | 66.10 | 68.93 | 79.06 | 74.19 | 69.25 | 50.03 | 39.05 | 22.65 | a | 52.87 | ||||||||||||
| 2010 | 34.52 | 40.70 | 42.47 | 47.57 | 53.37 | 69.43 | 78.95 | 72.23 | 64.63 | 55.63 | 38.40 | 37.76 | 52.97 | |||||||||||||
| 2011 | 33.84 | 34.18 | 44.42 | 48.60 | 55.53 | 66.03 | 76.27 | 75.11 | 69.25 | 54.48 | 37.47 | 28.23 | 51.95 | |||||||||||||
| 2012 | 33.71 | 36.98 | 45.74 | 53.65 | 62.11 | 69.02 | 78.31 | 77.76 | 67.87 | 52.16 | 40.70 | 29.82 | 53.99 | |||||||||||||
| 2013 | 19.24 | 31.80 | 43.47 | 48.53 | 57.18 | 68.37 | 77.03 | 70.85 | 63.33 | 45.98 | 38.98 | 21.21 | 48.83 | |||||||||||||
| 2014 | 32.03 | 39.00 | 43.47 | 49.47 | 58.69 | 68.57 | 79.11 | 71.60 | 65.82 | 53.05 | 38.80 | 34.85 | 52.87 | |||||||||||||
| 2015 | 34.08 | 41.82 | 47.65 | 48.18 | 59.13 | 73.02 | 74.90 | 73.76 | 64.42 | 56.35 | 35.57 | 30.58 | 53.29 | |||||||||||||
| 2016 | 32.89 | 39.71 | 45.45 | 53.98 | 59.11 | 71.40 | 74.58 | 73.73 | 61.57 | 50.71 | 41.43 | 29.53 | 52.84 | |||||||||||||
| 2017 | 30.26 | 39.07 | 45.05 | 48.20 | 59.68 | 69.58 | 76.76 | 75.06 | 62.58 | 47.21 | 41.90 | 27.08 | a | 51.87 | ||||||||||||
| 2018 | 36.58 | 30.57 | 38.97 | 50.58 | 60.18 | 68.18 | 78.23 | 72.42 | 62.50 | 49.03 | 35.95 | 31.82 | 51.25 | |||||||||||||
| 2019 | 34.29 | 33.45 | 41.18 | 51.68 | 54.45 | 67.52 | 75.47 | a | 74.34 | c | 61.92 | 44.50 | 40.15 | 35.50 | 51.20 | |||||||||||
| 2020 | 36.58 | 37.14 | 41.97 | 50.88 | 59.66 | b | 67.03 | 75.52 | 76.50 | 65.05 | 51.40 | 39.38 | e | 30.10 | a | 52.60 | ||||||||||
| 2021 | 33.50 | a | 36.70 | 38.68 | 49.92 | 59.29 | 75.70 | 80.29 | 74.52 | d | 64.67 | 49.60 | 42.03 | 32.56 | 53.12 | |||||||||||
| 2022 | 31.63 | 31.80 | 42.95 | 46.70 | 54.47 | a | 66.90 | 77.03 | 76.08 | 68.32 | 55.33 | g | 30.65 | 31.85 | 50.76 | a | ||||||||||
| 2023 | 31.03 | 31.98 | 36.08 | 47.18 | 58.29 | 64.42 | 76.84 | 72.66 | 62.27 | 50.76 | 37.55 | 33.52 | 50.21 | |||||||||||||
| 2024 | 35.39 | 37.24 | 41.37 | 49.60 | 56.55 | 70.92 | 77.87 | 70.40 | 64.20 | 53.57 | b | 34.52 | 32.89 | 52.04 | ||||||||||||
| 2025 | 29.90 | 38.04 | 43.11 | 49.37 | 62.67 | h | 70.09 | a | 75.00 | b | 73.74 | 66.18 | 51.19 | 44.78 | ----- | z | 54.14 | b | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 30.56 | 36.30 | 42.25 | 49.36 | 58.51 | 67.73 | 75.78 | 72.62 | 63.79 | 51.54 | 38.69 | 30.58 | 51.48 | |||||||||||||
| S.D. | 5.31 | 3.85 | 3.06 | 3.16 | 3.38 | 2.99 | 2.39 | 2.55 | 2.46 | 2.83 | 3.18 | 4.06 | 1.30 | |||||||||||||
| SKEW | -1.67 | -0.59 | 0.08 | -0.35 | 0.13 | 0.19 | 0.01 | 0.02 | 0.01 | -0.11 | -0.07 | -0.64 | -0.17 | |||||||||||||
| MAX | 38.29 | 43.77 | 48.50 | 56.07 | 66.10 | 75.70 | 81.82 | 77.76 | 69.25 | 58.00 | 45.47 | 38.11 | 53.99 | |||||||||||||
| MIN | 6.50 | 24.41 | 36.08 | 39.83 | 51.76 | 61.95 | 69.58 | 66.81 | 58.48 | 44.50 | 30.65 | 18.31 | 48.07 | |||||||||||||
| YRS | 72 | 72 | 72 | 73 | 71 | 72 | 73 | 72 | 72 | 70 | 73 | 73 | 68 | |||||||||||||