The best time to visit Southwest China (Yunnan, Chengdu) is Nov–Apr. Month by month, the verdicts rate Oct–May as comfortable on both daytime heat and rainfall — 8 months in all.
Mild; wet season Jun–Sep
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 15.3 | 60 | 10% | Go |
| February | 17.8 | 64 | 8% | Go |
| March | 21.3 | 70 | 12% | Go |
| April | 24.3 | 76 | 18% | Go |
| May | 26.0 | 79 | 38% | Go |
| June | 26.7 | 80 | 61% | Too wet |
| July | 26.2 | 79 | 74% | Too wet |
| August | 26.0 | 79 | 69% | Too wet |
| September | 24.7 | 76 | 52% | Fair |
| October | 21.8 | 71 | 39% | Go |
| November | 18.5 | 65 | 16% | Go |
| December | 15.3 | 60 | 9% | Go |
Verdict combines mean daytime high with rainy-day frequency. “Rainy days” is the share of days in the month with at least 1 mm of rain.
February is the driest month, with rain on 8% of days and daytime highs near 17.8°C (64°F). July is the wettest, at 74%. The warmest month is June at 26.7°C (80°F); the coolest is January at 15.3°C (60°F). The record rules out too wet in Jun–Aug.