| 年代 | 1960~1969 | 1970~1979 | 1980~1989 | 1990~1999 | 2000~1009 |
| 年日照时数距平/h | 102.3 | 51.1 | −25.8 | −57.9 | −84.4 |
| 气候倾向率h/10a | 27.2 | −60.1 | −5.4 | −113.9 | 35.1 |
| 变化趋势 | ↑ | ↓ | ↓ | ↓ | ↑ |