Weather Comparison
Side-by-side weather comparison for September
| Metric | Seville | Porto | Better |
|---|---|---|---|
| Average HighHigher is warmer | 30°C (86°F)▲ | 24°C (75°F) | Seville |
| Average LowHigher is milder | 19°C (66°F)▲ | 16°C (61°F) | Seville |
| Rain DaysFewer is drier | 4 days▲ | 6 days | Seville |
| PrecipitationLess is drier | 27 mm▲ | 64 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 | 14 km/h▲ | 17 km/h | Seville |
Seville and Porto 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.
Seville can feel quite hot at 30°C, so plan for heat. Porto is also comfortable at 24°C.
For travelers who prioritize dry weather, Seville is the stronger choice in September.
Seville reaches an average high of 30°C (86°F) and drops to 19°C (66°F) at night during September. The daily temperature range is 11°C, meaning moderate variation throughout the day.
Porto averages 24°C (75°F) for the high and 16°C (61°F) for the low, with a daily range of 8°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.
Seville receives approximately 27 mm of rainfall across 4 rain days during September. Rain is occasional, so a light rain jacket should suffice.
Porto sees 64 mm over 6 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 30°C, lows of 19°C, 4 rain days
Highs of 24°C, lows of 16°C, 6 rain days
The table below shows average high temperatures and rain days for every month. September is highlighted for quick reference.
| Month | Seville | Porto | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 15°C | 6d | 13°C | 12d |
| Feb | 17°C | 5d | 14°C | 10d |
| Mar | 20°C | 7d | 16°C | 10d |
| Apr | 22°C | 7d | 17°C | 12d |
| May | 26°C | 5d | 20°C | 11d |
| Jun | 32°C | 1d | 23°C | 6d |
| Jul | 35°C | 0d | 25°C | 4d |
| Aug | 35°C | 0d | 26°C | 4d |
| Sep | 30°C | 4d | 24°C | 6d |
| Oct | 25°C | 7d | 20°C | 13d |
| Nov | 19°C | 7d | 16°C | 13d |
| Dec | 16°C | 7d | 14°C | 13d |
Seville Weather in September
Full forecast, packing tips, and activities
Porto Weather in September
Full forecast, packing tips, and activities