Weather Comparison
Side-by-side weather comparison for September
| Metric | Hanoi | Luang Prabang | Better |
|---|---|---|---|
| Average HighHigher is warmer | 30°C (86°F)▲ | 29°C (84°F) | Hanoi |
| Average LowHigher is milder | 24°C (75°F)▲ | 23°C (73°F) | Hanoi |
| Rain DaysFewer is drier | 19 days▲ | 22 days | Hanoi |
| PrecipitationLess is drier | 242 mm | 194 mm▲ | Luang Prabang |
| Sunshine HoursMore is sunnier | 8h/day | 9h/day▲ | Luang Prabang |
| HumidityLower is more comfortable | 78% | 78% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 11 km/h | 6 km/h▲ | Luang Prabang |
Hanoi and Luang Prabang 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.
Hanoi can feel quite hot at 30°C, so plan for heat. Luang Prabang runs hot at 29°C.
For travelers who prioritize dry weather, Hanoi is the stronger choice in September. Luang Prabang receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.
Hanoi reaches an average high of 30°C (86°F) and drops to 24°C (75°F) at night during September. The daily temperature range is 6°C, meaning relatively stable temperatures from day to night.
Luang Prabang averages 29°C (84°F) for the high and 23°C (73°F) for the low, with a daily range of 6°C. The two cities feel quite similar in terms of temperature.
Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.
Hanoi receives approximately 242 mm of rainfall across 19 rain days during September. Rain is frequent, so waterproof gear is essential.
Luang Prabang sees 194 mm over 22 rain days. That makes Hanoi the drier option by 3 rain days and 48 mm of total precipitation.
Both cities share similar humidity levels at 78%.
Highs of 30°C, lows of 24°C, 19 rain days
Highs of 29°C, lows of 23°C, 22 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 | Hanoi | Luang Prabang | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 20°C | 8d | 27°C | 3d |
| Feb | 22°C | 8d | 30°C | 2d |
| Mar | 25°C | 11d | 33°C | 6d |
| Apr | 29°C | 11d | 33°C | 12d |
| May | 31°C | 17d | 32°C | 20d |
| Jun | 33°C | 19d | 31°C | 22d |
| Jul | 32°C | 21d | 30°C | 26d |
| Aug | 31°C | 23d | 30°C | 28d |
| Sep | 30°C | 19d | 29°C | 22d |
| Oct | 28°C | 12d | 29°C | 12d |
| Nov | 25°C | 7d | 28°C | 4d |
| Dec | 21°C | 7d | 26°C | 3d |
Hanoi Weather in September
Full forecast, packing tips, and activities
Luang Prabang Weather in September
Full forecast, packing tips, and activities