| Monthly Percent of Sunshine | ||||||||||||||
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg | ||
| 2008 | 45% | 45% | 52% | 60% | 58% | 53% | 65% | 74% | 53% | 61% | 37% | 54.8% | 2008 | |
| 2007 | 48% | 68% | 55% | 47% | 61% | 63% | 61% | 68% | 73% | 35% | 40% | 39% | 54.9% | 2007 |
| 2006 | 42% | 57% | 58% | 57% | 55% | 40% | 55% | 65% | 57% | 55% | 40% | 42% | 51.8% | 2006 |
| 2005 | 37% | 57% | 55% | 60% | 39% | 57% | 48% | 65% | 80% | 29% | 53% | 48% | 52.3% | 2005 |
| 2004 | 68% | 69% | 29% | 50% | 52% | 63% | 52% | 52% | 70% | 52% | 57% | 48% | 55.1% | 2004 |
| 2003 | 55% | 43% | 48% | 53% | 36% | 50% | 71% | 55% | 60% | 42% | 43% | 55% | 50.9% | 2003 |
| 2002 | 39% | 64% | 48% | 47% | 55% | 57% | 65% | 58% | 57% | 52% | 33% | 61% | 52.9% | 2002 |
| 2001 | 58% | 54% | 29% | 53% | 58% | 60% | 68% | 55% | 60% | 68% | 59% | 45% | 55.5% | 2001 |
| 2000 | 58% | 52% | 48% | 30% | 52% | 53% | 61% | 55% | 67% | 52% | 41% | 71% | 53.3% | 2000 |
| 1999 | 45% | 39% | 58% | 63% | 65% | 57% | 61% | 55% | 50% | 61% | 48% | 45% | 54.0% | 1999 |
| 1998 | 39% | 43% | 55% | 53% | 58% | 40% | 77% | 61% | 63% | 65% | 57% | 48% | 55.0% | 1998 |
| 1997 | 48% | 46% | 52% | 63% | 65% | 77% | 65% | 58% | 57% | 58% | 50% | 52% | 57.5% | 1997 |
| 1996 | 39% | 45% | 58% | 40% | 42% | 47% | 52% | 52% | 40% | 65% | 47% | 36% | 46.7% | 1996 |
| 1995 | 45% | 64% | 32% | 53% | 45% | 57% | 58% | 77% | 50% | 65% | 33% | 48% | 52.4% | 1995 |
| 1994 | 42% | 57% | 48% | 50% | 45% | 43% | 45% | 42% | 50% | 68% | 63% | 55% | 50.7% | 1994 |
| 1993 | 42% | 57% | 45% | 30% | 52% | 57% | 71% | 42% | 47% | 55% | 57% | 45% | 49.9% | 1993 |
| 1992 | 45% | 35% | 42% | 33% | 45% | 50% | 45% | 48% | 47% | 52% | 27% | 32% | 41.8% | 1992 |
| 1991 | 55% | 43% | 39% | 52% | 55% | 63% | 52% | 61% | 60% | 48% | 30% | 48% | 50.5% | 1991 |
| 1990 | 42% | 46% | 52% | 53% | 36% | 47% | 42% | 55% | 50% | 48% | 60% | 32% | 46.9% | 1990 |
| 1989 | 48% | 50% | 52% | 53% | 45% | 47% | 58% | 58% | 57% | 61% | 50% | 61% | 53.4% | 1989 |
| 1988 | 55% | 41% | 52% | 33% | 36% | 57% | 55% | 71% | 73% | 61% | 57% | 65% | 54.6% | 1988 |
| 1987 | 42% | 68% | 45% | 23% | 39% | 47% | 36% | 52% | 40% | 58% | 50% | 48% | 45.6% | 1987 |
| 1986 | 61% | 36% | 55% | 33% | 52% | 53% | 39% | 45% | 37% | 48% | 37% | 39% | 44.5% | 1986 |
| 1985 | 42% | 50% | 42% | 40% | 39% | 50% | 65% | 45% | 53% | 61% | 33% | 55% | 47.9% | 1985 |
| 1984 | 45% | 41% | 45% | 37% | 42% | 57% | 58% | 58% | 57% | 45% | 57% | 36% | 48.1% | 1984 |
| 1983 | 48% | 39% | 29% | 27% | 19% | 40% | 55% | 48% | 67% | 48% | 50% | 39% | 42.5% | 1983 |
| 1982 | 48% | 29% | 52% | 53% | 32% | 23% | 52% | 45% | 33% | 52% | 37% | 32% | 40.7% | 1982 |
| 1981 | 48% | 39% | 45% | 43% | 39% | 50% | 45% | 48% | 43% | 39% | 40% | 26% | 42.2% | 1981 |
| 1980 | 48% | 55% | 29% | 33% | 48% | 60% | 61% | 32% | 63% | 42% | 47% | 48% | 47.4% | 1980 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg | ||
| 1979 | 32% | 50% | 39% | 33% | 29% | 53% | 36% | 26% | 47% | 42% | 37% | 55% | 39.8% | 1979 |
| 1978 | 42% | 68% | 45% | 43% | 36% | 53% | 55% | 26% | 63% | 55% | 37% | 45% | 47.3% | 1978 |
| 1977 | 58% | 54% | 48% | 67% | 39% | 30% | 48% | 32% | 30% | 45% | 30% | 39% | 43.3% | 1977 |
| 1976 | 39% | 45% | 29% | 27% | 36% | 30% | 42% | 42% | 40% | 45% | 57% | 39% | 39.1% | 1976 |
| 1975 | 39% | 43% | 36% | 40% | 29% | 23% | 36% | 42% | 37% | 48% | 37% | 36% | 37.0% | 1975 |
| 1974 | 16% | 39% | 32% | 27% | 23% | 20% | 32% | 29% | 37% | 45% | 43% | 29% | 31.0% | 1974 |
| 1973 | 45% | 29% | 13% | 40% | 23% | 20% | 36% | 36% | 50% | 52% | 27% | 32% | 33.4% | 1973 |
| 1972 | 32% | 38% | 29% | 33% | 32% | 20% | 32% | 48% | 37% | 55% | 27% | 16% | 33.3% | 1972 |
| 1971 | 55% | 29% | 52% | 30% | 26% | 50% | 36% | 52% | 37% | 48% | 30% | 42% | 40.4% | 1971 |
| 1970 | 55% | 39% | 39% | 37% | 32% | 43% | 32% | 58% | 47% | 32% | 20% | 32% | 38.9% | 1970 |
| 1969 | 48% | 29% | 52% | 47% | 48% | 43% | 19% | 58% | 47% | 58% | 27% | 55% | 44.2% | 1969 |
| 1968 | 52% | 62% | 32% | 53% | 16% | 33% | 42% | 42% | 60% | 55% | 17% | 36% | 41.6% | 1968 |
| 1967 | 32% | 43% | 42% | 50% | 26% | 37% | 32% | 29% | 60% | 45% | 30% | 45% | 39.3% | 1967 |
| 1966 | 39% | 36% | 52% | 23% | 29% | 27% | 42% | 52% | 43% | 55% | 43% | 48% | 40.7% | 1966 |
| 1965 | 42% | 43% | 39% | 27% | 48% | 47% | 45% | 42% | 50% | 58% | 53% | 42% | 44.6% | 1965 |
| 1964 | 48% | 45% | 45% | 30% | 61% | 47% | 36% | 48% | 40% | 45% | 53% | 36% | 44.5% | 1964 |
| 1963 | 42% | 43% | 48% | 53% | 52% | 47% | 45% | 45% | 37% | 65% | 27% | 48% | 46.0% | 1963 |
| 1962 | 39% | 29% | 48% | 37% | 39% | 30% | 42% | 45% | 50% | 32% | 40% | 61% | 41.0% | 1962 |
| 1961 | 68% | 43% | 36% | 30% | 36% | 37% | 39% | 39% | 40% | 42% | 47% | 32% | 40.6% | 1961 |
| 1960 | 42% | 38% | 52% | 30% | 39% | 57% | 52% | 42% | 57% | 57% | 57% | 65% | 48.7% | 1960 |
| 1959 | 48% | 54% | 55% | 40% | 45% | 27% | 36% | 52% | 60% | 55% | 33% | 36% | 45.0% | 1959 |
| 1958 | 45% | 43% | 36% | 43% | 29% | 47% | 39% | 55% | 47% | 55% | 53% | 52% | 45.2% | 1958 |
| 1957 | 52% | 46% | 55% | 53% | 68% | 57% | 52% | 55% | 47% | 52% | 40% | 42% | 51.4% | 1957 |
| 1956 | 39% | 45% | 42% | 47% | 45% | 43% | 45% | 55% | 47% | 70% | 50% | 39% | 47.2% | 1956 |
| 1955 | 58% | 43% | 52% | 30% | 58% | 43% | 65% | 45% | 60% | 52% | 33% | 58% | 49.7% | 1955 |
| 1954 | 29% | 32% | 55% | 43% | 36% | 40% | 48% | 45% | 43% | 48% | 47% | 36% | 41.9% | 1954 |
| 1953 | 36% | 50% | 36% | 30% | 32% | 73% | 55% | 61% | 70% | 48% | 43% | 45% | 48.3% | 1953 |
| 1952 | 39% | 55% | 45% | 33% | 52% | 50% | 55% | 42% | 67% | 70% | 43% | 42% | 49.4% | 1952 |
| 1951 | 32% | 43% | 36% | 53% | 55% | 37% | 42% | 55% | 53% | 48% | 43% | 45% | 45.2% | 1951 |
| 1950 | 26% | 36% | 45% | 33% | 36% | 50% | 39% | 55% | 40% | 61% | 33% | 32% | 40.5% | 1950 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg | ||
| 1949 | 39% | 61% | 61% | 57% | 48% | 83% | 65% | 52% | 63% | 48% | 40% | 42% | 54.9% | 1949 |
| 1948 | 42% | 48% | 55% | 53% | 45% | 47% | 71% | 65% | 73% | 55% | 47% | 48% | 54.0% | 1948 |
| 1947 | 52% | 61% | 58% | 50% | 48% | 60% | 55% | 58% | 60% | 71% | 47% | 65% | 57.0% | 1947 |
| 1946 | 45% | 57% | 68% | 50% | 52% | 63% | 58% | 39% | 53% | 68% | 57% | 48% | 54.8% | 1946 |
| 1945 | 58% | 61% | 65% | 60% | 52% | 60% | 58% | 61% | 50% | 55% | 43% | 35% | 54.8% | 1945 |
| 1944 | 48% | 55% | 55% | 47% | 71% | 53% | 68% | 65% | 57% | 58% | 43% | 52% | 55.9% | 1944 |
| 1943 | 45% | 64% | 52% | 57% | 52% | 70% | 58% | 65% | 57% | 42% | 53% | 61% | 56.2% | 1943 |
| 1942 | 58% | 64% | 52% | 60% | 65% | 63% | 68% | 61% | 53% | 58% | 47% | 45% | 57.8% | 1942 |
| 1941 | 58% | 68% | 65% | 63% | 61% | 67% | 48% | 71% | 77% | 55% | 67% | 58% | 63.1% | 1941 |
| 1940 | 61% | 45% | 61% | 47% | 48% | 57% | 61% | 61% | 63% | 61% | 47% | 45% | 54.8% | 1940 |
| 1939 | 42% | 50% | 45% | 50% | 71% | 67% | 71% | 55% | 57% | 52% | 73% | 48% | 56.7% | 1939 |
| 1938 | 61% | 46% | 48% | 57% | 42% | 47% | 55% | 65% | 50% | 61% | 50% | 42% | 52.0% | 1938 |
| 1937 | 55% | 57% | 55% | 50% | 45% | 43% | 58% | 48% | 70% | 48% | 70% | 52% | 54.3% | 1937 |
| 1936 | 42% | 45% | 48% | 37% | 71% | 60% | 58% | 58% | 50% | 52% | 43% | 42% | 50.4% | 1936 |
| 1935 | 45% | 43% | 55% | 43% | 61% | 50% | 55% | 68% | 53% | 81% | 30% | 52% | 52.9% | 1935 |
| 1934 | 42% | 46% | 42% | 60% | 55% | 53% | 61% | 52% | 37% | 48% | 43% | 39% | 48.2% | 1934 |
| 1933 | 48% | 43% | 42% | 37% | 48% | 57% | 55% | 42% | 43% | 55% | 50% | 35% | 46.2% | 1933 |
| 1932 | 32% | 48% | 68% | 50% | 55% | 57% | 65% | 71% | 57% | 48% | 50% | 45% | 53.7% | 1932 |
| 1931 | 61% | 50% | 45% | 60% | 61% | 57% | 58% | 45% | 60% | 71% | 50% | 52% | 55.8% | 1931 |
| 1930 | 48% | 63% | 61% | 63% | 58% | 67% | 52% | 65% | 70% | 61% | 47% | 45% | 58.3% | 1930 |
| 1929 | 61% | 54% | 52% | 43% | 77% | 73% | 65% | 58% | 53% | 52% | 57% | 48% | 57.7% | 1929 |
| 1928 | 52% | 55% | 58% | 60% | 48% | 47% | 52% | 58% | 57% | 68% | 60% | 55% | 55.7% | 1928 |
| 1927 | 52% | 54% | 68% | 63% | 52% | 57% | 48% | 45% | 67% | 71% | 53% | 52% | 56.7% | 1927 |
| 1926 | 52% | 50% | 74% | 63% | 68% | 60% | 61% | 48% | 60% | 55% | 53% | 48% | 57.7% | 1926 |
| 1925 | 52% | 54% | 58% | 67% | 74% | 70% | 71% | 68% | 63% | 55% | 57% | 55% | 61.8% | 1925 |
| 1924 | 58% | 59% | 58% | 57% | 55% | 70% | 68% | 68% | 70% | 81% | 60% | 55% | 63.1% | 1924 |
| 1923 | 42% | 50% | 55% | 57% | 71% | 60% | 48% | 71% | 73% | 58% | 47% | 52% | 56.9% | 1923 |
| 1922 | 61% | 57% | ||||||||||||