Weather Comparison
Side-by-side weather comparison for September
| Metric | Singapore | Bangkok | Better |
|---|---|---|---|
| Average HighHigher is warmer | 29°C (84°F) | 31°C (88°F)▲ | Bangkok |
| Average LowHigher is milder | 25°C (77°F) | 25°C (77°F) | Tie |
| Rain DaysFewer is drier | 24 days▲ | 26 days | Singapore |
| PrecipitationLess is drier | 171 mm▲ | 241 mm | Singapore |
| Sunshine HoursMore is sunnier | 10h/day▲ | 9h/day | Singapore |
| HumidityLower is more comfortable | 82% | 82% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 13 km/h | 13 km/h | Tie |
Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Singapore edges ahead as the better destination in September. Singapore offers 10 hours of daily sunshine with only 24 rain days, while Bangkok sees 9 sunshine hours and 26 rain days.
Singapore can feel quite hot at 29°C, so plan for heat. Bangkok runs hot at 31°C.
For travelers who prioritize dry weather, Singapore is the stronger choice in September. Singapore receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.
Singapore reaches an average high of 29°C (84°F) and drops to 25°C (77°F) at night during September. The daily temperature range is 4°C, meaning relatively stable temperatures from day to night.
Bangkok averages 31°C (88°F) for the high and 25°C (77°F) for the low, with a daily range of 6°C. The 2°C difference is noticeable but not dramatic.
Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.
Singapore receives approximately 171 mm of rainfall across 24 rain days during September. Rain is frequent, so waterproof gear is essential.
Bangkok sees 241 mm over 26 rain days. That makes Singapore the drier option by 2 rain days and 70 mm of total precipitation.
Both cities share similar humidity levels at 82%.
Highs of 29°C, lows of 25°C, 24 rain days
Highs of 31°C, lows of 25°C, 26 rain days
Pack for both: lightweight breathable clothing, sunscreen SPF 50+, sunglasses, a wide-brimmed hat, waterproof jacket, compact umbrella, waterproof shoes, moisture-wicking fabrics. These items are useful in either destination during September.
The table below shows average high temperatures and rain days for every month. September is highlighted for quick reference.
| Month | Singapore | Bangkok | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 28°C | 22d | 31°C | 3d |
| Feb | 29°C | 18d | 32°C | 3d |
| Mar | 29°C | 24d | 34°C | 6d |
| Apr | 29°C | 27d | 35°C | 11d |
| May | 29°C | 28d | 33°C | 21d |
| Jun | 29°C | 24d | 32°C | 22d |
| Jul | 28°C | 24d | 32°C | 23d |
| Aug | 28°C | 25d | 31°C | 24d |
| Sep | 29°C | 24d | 31°C | 26d |
| Oct | 29°C | 26d | 30°C | 21d |
| Nov | 28°C | 28d | 31°C | 7d |
| Dec | 28°C | 27d | 31°C | 2d |
Singapore Weather in September
Full forecast, packing tips, and activities
Bangkok Weather in September
Full forecast, packing tips, and activities