Penang weather in September
September in Penang: sweltering, soaked, with very humid — a great time to visit.
#9 of 12 months in Penang · #416 of 604 destinations to visit in September · comfort 71/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Penang climate normals — September
| Daytime high | 28°C / 82°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 226 mm / 8.9 in | ⛈ soaked |
| Rainy days | 24 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 8.5 h/day | |
| Daylight | 12.1 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 63 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Penang in September — FAQ
- Is September a good time to visit Penang?
- September in Penang: sweltering, soaked, with very humid — a great time to visit. It ranks #9 of 12 months for Penang on SeasonMap's comfort score (71/100).
- What is the weather like in Penang in September?
- In September, Penang averages a daily high of 27.8°C and a low of 24.3°C, with about 226.2 mm of rain over roughly 24 rainy days.
- What is the air quality in Penang in September?
- Penang has a mean US Air Quality Index of about 63 in September.