Weather Comparison
Side-by-side weather comparison for September
| Metric | Luxembourg City | Paris | Better |
|---|---|---|---|
| Average HighHigher is warmer | 18°C (64°F) | 21°C (70°F)▲ | Paris |
| Average LowHigher is milder | 10°C (50°F) | 12°C (54°F)▲ | Paris |
| Rain DaysFewer is drier | 9 days | 8 days▲ | Paris |
| PrecipitationLess is drier | 61 mm | 47 mm▲ | Paris |
| Sunshine HoursMore is sunnier | 8h/day | 9h/day▲ | Paris |
| HumidityLower is more comfortable | 65% | 65% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 16 km/h▲ | 17 km/h | Luxembourg City |
Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Paris edges ahead as the better destination in September. Paris offers 9 hours of daily sunshine with only 8 rain days, while Luxembourg City sees 8 sunshine hours and 9 rain days.
Luxembourg City sits in the comfortable travel range at 18°C. Paris is also comfortable at 21°C.
For travelers who prioritize dry weather, Paris is the stronger choice in September. Paris receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.
Luxembourg City reaches an average high of 18°C (64°F) and drops to 10°C (50°F) at night during September. The daily temperature range is 8°C, meaning moderate variation throughout the day.
Paris averages 21°C (70°F) for the high and 12°C (54°F) for the low, with a daily range of 9°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.
Luxembourg City receives approximately 61 mm of rainfall across 9 rain days during September. You can expect rain roughly every other day.
Paris sees 47 mm over 8 rain days. That makes Paris the drier option by 1 rain day and 14 mm of total precipitation.
Both cities share similar humidity levels at 65%.
Highs of 18°C, lows of 10°C, 9 rain days
Highs of 21°C, lows of 12°C, 8 rain days
Pack for both: a packable rain jacket, an umbrella. 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 | Luxembourg City | Paris | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 4°C | 12d | 7°C | 12d |
| Feb | 5°C | 11d | 8°C | 10d |
| Mar | 9°C | 12d | 12°C | 11d |
| Apr | 13°C | 11d | 15°C | 11d |
| May | 17°C | 12d | 19°C | 11d |
| Jun | 20°C | 11d | 22°C | 10d |
| Jul | 22°C | 11d | 24°C | 10d |
| Aug | 22°C | 11d | 24°C | 9d |
| Sep | 18°C | 9d | 21°C | 8d |
| Oct | 13°C | 12d | 16°C | 11d |
| Nov | 8°C | 13d | 11°C | 11d |
| Dec | 5°C | 14d | 7°C | 12d |
Luxembourg City Weather in September
Full forecast, packing tips, and activities
Paris Weather in September
Full forecast, packing tips, and activities