| DJF | Dec | Jan | Feb | Mar | Apr |
Onset date in Yunnan | −0.289 | −0.132 | −0.280 | −0.253 | 0.005 | 0.033 |
Yunnan’s precipitation in May | 0.293 | 0.082 | 0.302 | 0.281 | 0.04 | 0.102 |
Onset date in Kunming | −0.442* | −0.305 | −0.342 | −0.391* | 0.048 | 0.148 |
Kunming’s precipitation in May | 0.304 | 0.172 | 0.259 | 0.277 | −0.03 | 0.042 |