Malaysia
Penang in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Penang in September is climatically mixed. The average daily high is around 29 °C, and the sea is about 30 °C. With about 27 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
53/100 · #6
Warmth
#10
Dryness
#10
Sun
#9
Sea warmth
#7
Published best categories: none
Penang · SeptemberPhoto: Supanut Arunoprayote · CC BY 4.0Climate facts
- Average high
- 29 °C
- Average low
- 24 °C
- Sea
- 30 °C
- Rainy days (est.)
- 27 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 85 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 29 | 24 | 25 | 213 | 6.1 | 84 | 1.1 | 30 | 53 |
| September (selected) | 29 | 24 | 27 | 255 | 5.9 | 85 | 1.1 | 30 | 53 |
| October | 29 | 24 | 28 | 306 | 5.8 | 86 | 1.1 | 30 | 54 |
How do the previous and next months compare?
Baseline: September (53/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | ±0 | ±0 °C | +0.2 °C | -1.1 | -42.1 mm | +0.2 h | -0.5 % | ±0 m/s | +0.3 °C |
| October | +1 | -0.1 °C | -0.2 °C | +1.5 | +50.9 mm | -0.1 h | +1.4 % | ±0 m/s | -0.3 °C |
All twelve months in context
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Where to stay in Penang
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Useful next decisions
Frequently asked questions
How warm is Penang in September?
The average daily high is around 29 °C, with an average daily low of about 24 °C.
Can you swim in Penang in September?
The sea is about 30 °C (very warm).
Does it rain a lot in Penang in September?
The curated estimate is about 27 rainy days per month, not a directly measured long-term average. Total precipitation averages around 255 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Penang?
By the climate score, January and February are the strongest months for Penang. For a beach trip: January, February, October and December. September is not among them.