Porto in September
In September, Porto averages 25°C (77°F) during the day and 16°C (61°F) at night, with around 8 days of rain (65 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Occasional showers are likely but won't dominate.
September is a great month to visit Porto: pleasant temperatures and relatively few wet days.
How September compares to the rest of the year in Porto
September is one of the warmest months in Porto (3rd of 12) and one of the driest months (10th of 12). Daytime temperature runs 5°C above the annual average (20°C). September runs 1°C cooler than August (26°C) and cools 4°C in October (21°C).
September sunrise & sunset in Porto
Times shown for Porto local time (Europe/Lisbon), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Porto — September
Golden-hour and blue-hour windows for the 15th of September, in Porto's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Porto in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Porto's popularity.
Crowds & pricing — September in Porto
This is a busy month in Porto — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Porto
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Porto in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 14°C / 57°F | 8°C / 46°F | 130 mm | 14 | 0 |
| February | 15°C / 59°F | 8°C / 46°F | 105 mm | 13 | 0 |
| March | 17°C / 63°F | 9°C / 48°F | 85 mm | 12 | 0 |
| April | 18°C / 64°F | 11°C / 52°F | 90 mm | 13 | 0 |
| May | 20°C / 68°F | 13°C / 55°F | 75 mm | 12 | 0 |
| June | 24°C / 75°F | 15°C / 59°F | 35 mm | 8 | 0 |
| July | 26°C / 79°F | 17°C / 63°F | 20 mm | 4 | 0 |
| August | 26°C / 79°F | 17°C / 63°F | 20 mm | 4 | 0 |
| September | 25°C / 77°F | 16°C / 61°F | 65 mm | 8 | 0 |
| October | 21°C / 70°F | 14°C / 57°F | 130 mm | 13 | 0 |
| November | 17°C / 63°F | 11°C / 52°F | 145 mm | 14 | 0 |
| December | 14°C / 57°F | 9°C / 48°F | 165 mm | 14 | 0 |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Porto in September →
Frequently asked questions
How hot is Porto in September?
In September, Porto averages a high of 25°C (77°F) and a low of 16°C (61°F) — generally warm.
Does it rain a lot in Porto in September?
September sees occasional rain in Porto, with about 8 rainy days on average.
Is September a good time to visit Porto?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Porto in September?
Pack light layers for warm days and cooler evenings. See the full September packing list for Porto for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.