What to pack for Porto in September
- t-shirts and light layers
- a light jacket for evenings
- a packable rain layer
Humidity averages 76%; max daily wind around 20 km/h.
How September compares
Best months in Porto: May–September. See the full best time to visit Porto guide.
Porto in September: the details
In September, Porto sees average daytime highs of 23°C (74°F) and overnight lows of 16°C (61°F). Rainfall totals roughly 89 mm across 7.7 rainy days, and the sun shines about 10.6 hours per day with 12.3 hours of daylight mid-month. Relative humidity averages 76%.
In context: September is the third-warmest month and the 8th-wettest in Porto. The sunniest month is July (13.3 h/day).
| Metric | September average |
|---|---|
| Daytime high | 23°C / 74°F |
| Overnight low | 16°C / 61°F |
| Rainfall | 89 mm over 7.7 rainy days |
| Sunshine | 10.6 h/day (12.3 h daylight) |
| Humidity | 76% |
| Travel score | 9.8 / 10 |
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Porto, Portugal (41.15, -8.61) — see our methodology. Actual conditions vary year to year.
Not set on Porto? Browse the best places to visit in September ranked by travel score.
Frequently asked questions
How hot is Porto in September?
Daytime highs in Porto in September average 23°C (74°F); nights drop to about 16°C.
Does it rain in Porto in September?
Expect around 7.7 rainy days and 89 mm of rainfall in September.
Is September a good time to visit Porto?
September is one of the best months to visit Porto. Overall travel score: 9.8/10. The best months are May–September.
Also good in September, near Porto
Where should you go next month?
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