Weather Comparison
Side-by-side weather comparison for September
| Metric | Phu Quoc | Phnom Penh | Better |
|---|---|---|---|
| Average HighHigher is warmer | 28°C (82°F) | 31°C (88°F)▲ | Phnom Penh |
| Average LowHigher is milder | 25°C (77°F)▲ | 24°C (75°F) | Phu Quoc |
| Rain DaysFewer is drier | 27 days | 27 days | Tie |
| PrecipitationLess is drier | 396 mm | 251 mm▲ | Phnom Penh |
| Sunshine HoursMore is sunnier | 8h/day | 9h/day▲ | Phnom Penh |
| HumidityLower is more comfortable | 82% | 82% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 27 km/h | 13 km/h▲ | Phnom Penh |
Phu Quoc and Phnom Penh are closely matched in September. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.
Phu Quoc sits in the comfortable travel range at 28°C. Phnom Penh runs hot at 31°C.
For travelers who prioritize dry weather, both cities are equally dry in September. Phnom Penh receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.
Phu Quoc reaches an average high of 28°C (82°F) and drops to 25°C (77°F) at night during September. The daily temperature range is 3°C, meaning relatively stable temperatures from day to night.
Phnom Penh averages 31°C (88°F) for the high and 24°C (75°F) for the low, with a daily range of 7°C. The 3°C difference is noticeable but not dramatic.
Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.
Phu Quoc receives approximately 396 mm of rainfall across 27 rain days during September. Rain is frequent, so waterproof gear is essential.
Phnom Penh sees 251 mm over 27 rain days. Both cities are equally rainy this month.
Both cities share similar humidity levels at 82%.
Highs of 28°C, lows of 25°C, 27 rain days
Highs of 31°C, lows of 24°C, 27 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 | Phu Quoc | Phnom Penh | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 28°C | 9d | 32°C | 3d |
| Feb | 28°C | 8d | 33°C | 2d |
| Mar | 29°C | 14d | 35°C | 6d |
| Apr | 30°C | 20d | 35°C | 14d |
| May | 29°C | 27d | 34°C | 23d |
| Jun | 28°C | 27d | 32°C | 24d |
| Jul | 28°C | 28d | 32°C | 25d |
| Aug | 28°C | 28d | 32°C | 25d |
| Sep | 28°C | 27d | 31°C | 27d |
| Oct | 28°C | 27d | 30°C | 25d |
| Nov | 28°C | 16d | 30°C | 11d |
| Dec | 28°C | 9d | 31°C | 5d |
Phu Quoc Weather in September
Full forecast, packing tips, and activities
Phnom Penh Weather in September
Full forecast, packing tips, and activities