Weather in Porto in September
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Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youPorto in September is warm — daytime temperatures average 23.3°C, dropping to 16.1°C at night. The month is fairly wet (9 rainy days on average), with roughly 10.5 hours of sunshine a day. It is one of the best months of the year to visit. For the complete picture, see the best time to visit Porto — every month compared. Once you know when to go, find your Porto packing list at 247PackingList.
Get ready for Porto in September
Search flights to Porto
Compare 100+ airlines for September — one search, best price.
Search Flights →Travel clothing layers
Pack layers — temperatures can vary significantly between day and night.
Check Price →What to pack for Porto in September
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Compare all months in Porto
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 13.3°C | 156.7mm | 9/10 |
| February | 15.6°C | 90.6mm | 10/10 |
| March | 16.3°C | 102.4mm | 9/10 |
| April | 17.8°C | 102.7mm | 9/10 |
| May | 20.6°C | 74.1mm | 10/10 |
| June | 21.5°C | 52.0mm | 10/10 |
| July | 24.5°C | 12.7mm | 10/10 |
| August | 23.9°C | 12.8mm | 10/10 |
| September | 23.3°C | 104.2mm | 9/10 |
| October | 20.6°C | 232.9mm | 8/10 |
| November | 16.8°C | 169.7mm | 9/10 |
| December | 14.4°C | 249.5mm | 8/10 |
Full month-by-month guide: best time to visit Porto →
For facts about Portugal — currency, language and dialling code — see our Portugal country guide at 247CountryInfo. Travellers also find it useful to keep a Porto travel guide to hand. Check clothing sizes in Portugal before you shop.
Frequently Asked Questions
Is September a good time to visit Porto?
September rates 9/10 for visiting Porto — excellent time to visit. Expect average highs of 23.3°C, 104.2mm of rain across the month and about 10.5 hours of daily sunshine.
What is the temperature in Porto in September?
In September, Porto has average highs of 23.3°C (73.9°F) and average lows of 16.1°C (61.0°F).
Does it rain in Porto in September?
Some rain is likely. Porto averages 104.2mm across about 9 rainy days in September, so a light waterproof layer is worth packing.
What should I wear in Porto in September?
For Porto in September (23.3°C highs / 16.1°C lows), pack light layers plus sunscreen, t-shirts and light trousers or shorts, compact travel umbrella.
More essentials for Porto in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.