| month | J | F | M | A | M | J | J | A | S | O | N | D | Avg. |
| mm | 7.1 | 35.1 | 71.0 | 148.2 | 159.0 | 174.0 | 97.7 | 79.9 | 162.1 | 141.1 | 20.7 | 6.8 | 91.9 |