Weather Comparison
Side-by-side weather comparison for September
| Metric | Geneva | Paris | Better |
|---|---|---|---|
| Average HighHigher is warmer | 20°C (68°F) | 21°C (70°F)▲ | Paris |
| Average LowHigher is milder | 12°C (54°F) | 12°C (54°F) | Tie |
| Rain DaysFewer is drier | 12 days | 8 days▲ | Paris |
| PrecipitationLess is drier | 108 mm | 47 mm▲ | Paris |
| Sunshine HoursMore is sunnier | 10h/day▲ | 9h/day | Geneva |
| HumidityLower is more comfortable | 65% | 65% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 10 km/h▲ | 17 km/h | Geneva |
Geneva and Paris 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.
Geneva sits in the comfortable travel range at 20°C. Paris is also comfortable at 21°C.
For travelers who prioritize dry weather, Paris is the stronger choice in September. Geneva receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.
Geneva reaches an average high of 20°C (68°F) and drops to 12°C (54°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 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.
Geneva receives approximately 108 mm of rainfall across 12 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 4 rain days and 61 mm of total precipitation.
Both cities share similar humidity levels at 65%.
Highs of 20°C, lows of 12°C, 12 rain days
Highs of 21°C, lows of 12°C, 8 rain days
Pack for both: light layers, a light jacket for evenings, sunscreen. 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 | Geneva | Paris | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 5°C | 13d | 7°C | 12d |
| Feb | 7°C | 11d | 8°C | 10d |
| Mar | 11°C | 13d | 12°C | 11d |
| Apr | 15°C | 13d | 15°C | 11d |
| May | 19°C | 16d | 19°C | 11d |
| Jun | 22°C | 14d | 22°C | 10d |
| Jul | 24°C | 13d | 24°C | 10d |
| Aug | 24°C | 12d | 24°C | 9d |
| Sep | 20°C | 12d | 21°C | 8d |
| Oct | 16°C | 12d | 16°C | 11d |
| Nov | 10°C | 13d | 11°C | 11d |
| Dec | 6°C | 13d | 7°C | 12d |
Geneva Weather in September
Full forecast, packing tips, and activities
Paris Weather in September
Full forecast, packing tips, and activities