Weather in Lisbon in September
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Book now, pay at pickup — compare Hertz, Avis, Budget, Sixt and 800+ rental companies for September in Lisbon.
Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youLisbon in September is warm — daytime temperatures average 25.7°C, dropping to 17.7°C at night. The month is moderately rainy (7 rainy days), with roughly 10.7 hours of sunshine a day. Weather-wise, this is one of the most reliable months to travel. For the complete picture, see the best time to visit Lisbon — every month compared. Once you know when to go, find your Lisbon packing list at 247PackingList.
Get ready for Lisbon in September
Search flights to Lisbon
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 Lisbon in September
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Light waterproof layer
Compare all months in Lisbon
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 14.5°C | 35.9mm | 10/10 |
| February | 16.7°C | 53.5mm | 10/10 |
| March | 17.9°C | 48.6mm | 10/10 |
| April | 19.7°C | 70.5mm | 10/10 |
| May | 23.6°C | 25.8mm | 10/10 |
| June | 25.0°C | 16.8mm | 10/10 |
| July | 29.1°C | 0.3mm | 10/10 |
| August | 28.3°C | 1.2mm | 10/10 |
| September | 25.7°C | 62.0mm | 10/10 |
| October | 23.6°C | 95.2mm | 10/10 |
| November | 18.3°C | 58.7mm | 10/10 |
| December | 16.1°C | 119.6mm | 9/10 |
Full month-by-month guide: best time to visit Lisbon →
For facts about Portugal — currency, language and dialling code — see our Portugal country guide at 247CountryInfo. Travellers also find it useful to keep a Lisbon travel guide to hand. Check clothing sizes in Portugal before you shop.
Frequently Asked Questions
Is September a good time to visit Lisbon?
September rates 10/10 for visiting Lisbon — excellent time to visit. Expect average highs of 25.7°C, 62.0mm of rain across the month and about 10.7 hours of daily sunshine.
What is the temperature in Lisbon in September?
In September, Lisbon has average highs of 25.7°C (78.3°F) and average lows of 17.7°C (63.9°F).
Does it rain in Lisbon in September?
Some rain is likely. Lisbon averages 62.0mm across about 7 rainy days in September, so a light waterproof layer is worth packing.
What should I wear in Lisbon in September?
For Lisbon in September (25.7°C highs / 17.7°C lows), pack light layers plus sunscreen, t-shirts and light trousers or shorts, light waterproof layer.
More essentials for Lisbon 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.