

| 平年値1976/01〜1997/12 | 八代 | |||
| 月 | 降水量(mm) | 平均気温(℃) | 最高気温(℃) | 最低気温(℃) |
| 1 | 62.3 | 6.2 | 17.4 | -2.4 |
| 2 | 79.3 | 6.9 | 18.7 | -2.4 |
| 3 | 148.7 | 10.3 | 21.6 | -0.4 |
| 4 | 146.7 | 15.0 | 25.7 | 3.5 |
| 5 | 183.8 | 19.1 | 28.7 | 9.0 |
| 6 | 378.8 | 22.9 | 30.9 | 14.6 |
| 7 | 412.9 | 26.8 | 34.1 | 20.4 |
| 8 | 212.5 | 27.3 | 34.7 | 20.8 |
| 9 | 172.7 | 23.9 | 32.5 | 14.6 |
| 10 | 73.3 | 18.3 | 28.1 | 7.0 |
| 11 | 76.2 | 13.3 | 24.3 | 2.4 |
| 12 | 54.9 | 8.3 | 19.4 | -0.7 |
| 2002.1 | 16.5 | 34.7 | -2.4 | |
| 2002年 | 八代 | |||
| 月 | 降水量(mm) | 平均気温(℃) | 最高気温(℃) | 最低気温(℃) |
| 1 | 65 | 7.4 | 19.2 | -1.4 |
| 2 | 77 | 7.8 | 17.9 | -1.5 |
| 3 | 88 | 12.0 | 22.8 | 1.5 |
| 4 | 177 | 16.6 | 28.3 | 4.9 |
| 5 | 200 | 20.3 | 27.7 | 12.4 |
| 6 | 271 | 23.3 | 31.9 | 16.8 |
| 7 | 171 | 27.4 | 34.3 | 21.6 |
| 8 | 108 | 27.3 | 33.9 | 18.1 |
| 9 | 73 | 24.5 | 35.5 | 13.5 |
| 10 | 83 | 18.1 | 29.2 | 6.5 |
| 11 | 137 | 10.9 | 23.3 | 1.3 |
| 12 | 134 | 9.1 | 19.1 | -1.4 |
| 1581.0 | 17.1 | 35.5 | -1.5 | |
| 平年値1976/01〜1997/12 | 八代 | |||
| 月 | 降水量(mm) | 平均気温(℃) | 最高気温(℃) | 最低気温(℃) |
| 1 | 62.3 | 6.2 | 17.4 | -2.4 |
| 2 | 79.3 | 6.9 | 18.7 | -2.4 |
| 3 | 148.7 | 10.3 | 21.6 | -0.4 |
| 4 | 146.7 | 15.0 | 25.7 | 3.5 |
| 5 | 183.8 | 19.1 | 28.7 | 9.0 |
| 6 | 378.8 | 22.9 | 30.9 | 14.6 |
| 7 | 412.9 | 26.8 | 34.1 | 20.4 |
| 8 | 212.5 | 27.3 | 34.7 | 20.8 |
| 9 | 172.7 | 23.9 | 32.5 | 14.6 |
| 10 | 73.3 | 18.3 | 28.1 | 7.0 |
| 11 | 76.2 | 13.3 | 24.3 | 2.4 |
| 12 | 54.9 | 8.3 | 19.4 | -0.7 |
| 2002.1 | 16.5 | 34.7 | -2.4 | |
| 2003年 | 八代 | |||
| 月 | 降水量(mm) | 平均気温(℃) | 最高気温(℃) | 最低気温(℃) |
| 1 | 60 | 5.8 | 16.1 | -1.9 |
| 2 | 59 | 8.3 | 16.6 | -1.2 |
| 3 | 132 | 10.1 | 23.3 | -0.1 |
| 4 | 231 | 16.6 | 28.6 | 3.3 |
| 5 | 126 | 20.8 | 29.6 | 9.7 |
| 6 | 310 | 23.0 | 31.1 | 14.8 |
| 7 | 387 | 26.5 | 33.7 | 19.7 |
| 8 | 0 | 0.0 | 0.0 | 0.0 |
| 9 | 0 | 0.0 | 0.0 | 0.0 |
| 10 | 0 | 0.0 | 0.0 | 0.0 |
| 11 | 0 | 0.0 | 0.0 | 0.0 |
| 12 | 0 | 0.0 | 0.0 | 0.0 |