01Weather
Lisbon weather in September
Afternoons in September average 26.7 °C (80 °F) and nights cool to 18.1 °C (65 °F). The month brings about 38 mm (1.5 in) of rain spread over roughly 4 days. Compared with August it is 2.4 °C cooler; October is 2.8 °C cooler again.
What the averages hide
| In a typical September | Value | What it means |
|---|---|---|
| Warm afternoons (90th percentile) | 31 °C / 89 °F | one day in ten is at least this warm |
| Cool afternoons (10th percentile) | 23 °C / 73 °F | one day in ten stays below this |
| Cold nights (10th percentile) | 16 °C / 61 °F | one night in ten is colder than this |
| Days above 30 °C (86 °F) | 5.0 | per month, average 2016–2025 |
| Nights at or below 0 °C (32 °F) | 0.0 | frost mornings per month |
| Chance of rain on any given day | 13 % | at least 1 mm |
| Hottest / coldest September day 2016–2025 | 38.0 °C / 13.8 °C | extremes in the ten-year record |
02Daylight
Sunrise, sunset and the length of the day
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 September | 07:05 | 20:07 | 13.0 h |
| 15 September | 07:18 | 19:45 | 12.5 h |
| 30 September | 07:31 | 19:21 | 11.8 h |
Daylight shrinks by about 72 minutes over the month. Times are local (Europe/Lisbon).
03Crowds
How busy Lisbon is in September
busy The main sights are busy in September. What drives it:
- warm sea
- Santa Casa Alfama fado festival
- schools back
04Public holidays
Public holidays in September 2027
No public holidays in Portugal fall in September, so shops and museums keep normal hours all month.
05Events
What's on in Lisbon in September
Every year in September
| Event | When | Type |
|---|---|---|
| Santa Casa Alfama | September, fado festival | music |
07Packing
What to pack for Lisbon in September
- light, breathable clothing
- sun hat and sunscreen
- refillable water bottle
- something for heat: 5 days a month pass 30 °C on average
08Editor's notes
What the numbers don't tell you
September keeps summer warmth with afternoons around 27 °C and the sea at its most swimmable, around 20 °C, while the schools return and the crowds ease after the first week. The Santa Casa Alfama fado festival fills the old quarter's squares in late September. It is many locals' favourite month, and rates begin to fall. Rain falls on about three days.
The Lisbon Film Festival and the Todos festival in the Mouraria fill the second half. The Sintra palaces are still busy at weekends. The cruise ships continue daily. Daylight shrinks from thirteen and a half hours to twelve. For the mild, golden month with Republic Day and the Marathon, see October.
09Compare
Lisbon month by month
| Month | High | Low | Rain days | Sun h | Crowds | Verdict |
|---|---|---|---|---|---|---|
| January | 16 °C | 9 °C | 9 | – | quiet | Good |
| February | 17 °C | 10 °C | 10 | – | quiet | Good |
| March | 18 °C | 11 °C | 8 | – | moderate | Excellent |
| April | 21 °C | 13 °C | 9 | – | busy | Excellent |
| May | 24 °C | 15 °C | 4 | – | busy | Excellent |
| June | 26 °C | 17 °C | 3 | – | very busy | Good |
| July | 28 °C | 19 °C | 0 | – | very busy | Good |
| August | 29 °C | 19 °C | 1 | – | very busy | Good |
| September | 27 °C | 18 °C | 4 | – | busy | Excellent |
| October | 24 °C | 17 °C | 8 | – | busy | Excellent |
| November | 18 °C | 13 °C | 10 | – | moderate | Excellent |
| December | 16 °C | 10 °C | 9 | – | moderate | Good |
Not sure about September? See the best time to visit Lisbon.
10Elsewhere
September in nearby cities
| City | High | Rain days |
|---|---|---|
| Barcelona in September | 27 °C | 6 |
| Paris in September | 22 °C | 10 |
| London in September | 19 °C | 7 |
| Dublin in September | 18 °C | 13 |
| Rome in September | 28 °C | 6 |
| Amsterdam in September | 20 °C | 10 |
11FAQ
Lisbon in September: your questions
Is September a good time to visit Lisbon?
September is one of the best months to visit Lisbon. Daytime highs average 27 °C (80 °F), rain falls on about 4 days, and hotel arrivals run above the yearly average, so the main sights are busy.
What is the weather like in Lisbon in September?
Expect warm days around 27 °C (80 °F) and nights near 18 °C (65 °F). One September in ten brings afternoons above 31 °C, and one in ten stays below 23 °C.
Does it rain a lot in Lisbon in September?
September brings about 38 mm (1.5 in) of rain over roughly 4 days, which is dry by Lisbon standards. On any given day the chance of at least 1 mm of rain is 13 percent.
What should I wear in Lisbon in September?
Pack light, breathable clothing, sun hat and sunscreen, refillable water bottle.
Is Lisbon crowded in September?
The main sights are busy in September. Main drivers: warm sea; Santa Casa Alfama fado festival; schools back.
What time does it get dark in Lisbon in September?
Around the middle of September the sun sets at about 19:45 and rises at 07:18, giving 12.5 hours of daylight.