Weather Comparison
Side-by-side weather comparison for September
| Metric | Porto | Seville | Better |
|---|---|---|---|
| Average HighHigher is warmer | 24°C (75°F) | 30°C (86°F)▲ | Seville |
| Average LowHigher is milder | 16°C (61°F) | 19°C (66°F)▲ | Seville |
| Rain DaysFewer is drier | 6 days | 4 days▲ | Seville |
| PrecipitationLess is drier | 64 mm | 27 mm▲ | Seville |
| Sunshine HoursMore is sunnier | 11h/day | 11h/day | Tie |
| HumidityLower is more comfortable | 65% | 65% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 17 km/h | 14 km/h▲ | Seville |
Porto and Seville 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.
Porto sits in the comfortable travel range at 24°C. Seville runs hot at 30°C.
For travelers who prioritize dry weather, Seville is the stronger choice in September.
Porto reaches an average high of 24°C (75°F) and drops to 16°C (61°F) at night during September. The daily temperature range is 8°C, meaning moderate variation throughout the day.
Seville averages 30°C (86°F) for the high and 19°C (66°F) for the low, with a daily range of 11°C. There is a notable 6°C gap between the two cities, so expect a very different feel.
Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.
Porto receives approximately 64 mm of rainfall across 6 rain days during September. Rain is occasional, so a light rain jacket should suffice.
Seville sees 27 mm over 4 rain days. That makes Seville the drier option by 2 rain days and 37 mm of total precipitation.
Both cities share similar humidity levels at 65%.
Highs of 24°C, lows of 16°C, 6 rain days
Highs of 30°C, lows of 19°C, 4 rain days
The table below shows average high temperatures and rain days for every month. September is highlighted for quick reference.
| Month | Porto | Seville | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 13°C | 12d | 15°C | 6d |
| Feb | 14°C | 10d | 17°C | 5d |
| Mar | 16°C | 10d | 20°C | 7d |
| Apr | 17°C | 12d | 22°C | 7d |
| May | 20°C | 11d | 26°C | 5d |
| Jun | 23°C | 6d | 32°C | 1d |
| Jul | 25°C | 4d | 35°C | 0d |
| Aug | 26°C | 4d | 35°C | 0d |
| Sep | 24°C | 6d | 30°C | 4d |
| Oct | 20°C | 13d | 25°C | 7d |
| Nov | 16°C | 13d | 19°C | 7d |
| Dec | 14°C | 13d | 16°C | 7d |
Porto Weather in September
Full forecast, packing tips, and activities
Seville Weather in September
Full forecast, packing tips, and activities