Peninsular Malaysia (Kuala Lumpur, Penang) is demanding in every month. No month rates better than marginal on heat and rainfall together, so the trip is about tolerating the conditions rather than avoiding them.
Wet Apr & Oct–Nov; no true dry season
| Month | High °C | High °F | Rainy days | Verdict |
|---|---|---|---|---|
| January | 28.8 | 84 | 64% | Too wet |
| February | 29.6 | 85 | 59% | Too wet |
| March | 30.1 | 86 | 67% | Too wet |
| April | 30.2 | 86 | 78% | Too wet |
| May | 29.8 | 86 | 72% | Too wet |
| June | 29.1 | 84 | 61% | Too wet |
| July | 28.7 | 84 | 65% | Too wet |
| August | 28.8 | 84 | 70% | Too wet |
| September | 29.0 | 84 | 72% | Too wet |
| October | 29.1 | 84 | 80% | Too wet |
| November | 28.8 | 84 | 88% | Too wet |
| December | 28.4 | 83 | 78% | Too wet |
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 59% of days and daytime highs near 29.6°C (85°F). November is the wettest, at 88%. Temperature barely moves all year — just 1.8°C between the warmest and coolest months — so rainfall, not heat, decides when to go. The record rules out too wet in Jan–Dec.