| 序号 | 年份 | 多站平均(mm) | 九站平均(mm) | 误差(%) |
| 1 | 1955 | 1797.5 | 1838.9 | −2.31 |
| 2 | 1957 | 1648.7 | 1688.1 | −2.39 |
| 3 | 1970 | 1970.6 | 1963.6 | 0.36 |
| 4 | 1971 | 1273.3 | 1299.7 | −2.07 |
| 5 | 1973 | 2141.5 | 2130.5 | 0.51 |
| 6 | 1974 | 1575.6 | 1622.7 | −2.99 |
| 7 | 1975 | 2134 | 2162.6 | −1.34 |
| 8 | 1978 | 1060.6 | 1043.3 | 1.63 |
| 9 | 1979 | 1167.8 | 1188.1 | −1.74 |
| 10 | 1984 | 1622.3 | 1584.1 | 2.35 |
| 11 | 1985 | 1405.3 | 1431.5 | −1.87 |
| 12 | 1986 | 1287.2 | 1290.1 | −0.23 |
| 13 | 1987 | 1513.3 | 1547 | −2.23 |