Month guide · Paço de Arcos, Portugal
Paço de Arcos in September: weather and what to expect
In September, Paço de Arcos averages highs of 23°C and lows of 18°C, with about 4 rainy days and 31 mm of rain. Highs are 1°C cooler than in August and 3°C warmer than in October. Our rules rate it good for walking and cycling. Crowds in the Lisbon area are high.
Is September a good time to visit?
Good for
- Walking and cyclingHighs of 23°C with about 4 rainy days
Not ideal for
Nothing stands out as a weaker fit.
Daily highs through September
Town-level · ERA5-Land 1991-2020Highs fall about 2°C over the month. Nights below 15°C in about 1 in 4.
September in detail
Town-level · ERA5-LandCrowds, holidays and daylight
Public holidays in September 2027
No national or regional public holidays.
Local (municipal) holidays are not included.
Warmer in September
Where is warm in September →| Place | High | Rain days | From Paço de Arcos |
|---|---|---|---|
| Marinhais, Oeste e Vale do Tejo | 28°C | 5 | 64 km |
| Benavente, Oeste e Vale do Tejo | 28°C | 5 | 52 km |
| Salvaterra de Magos, Oeste e Vale do Tejo | 28°C | 5 | 57 km |
| Samora Correia, Oeste e Vale do Tejo | 27°C | 5 | 45 km |
| Pontével, Oeste e Vale do Tejo | 27°C | 5 | 64 km |
The nearest towns with a warmer September. Distances are in a straight line.
How September is changing
Town-level · ERA5-LandSeptember highs are 0.8°C warmer than in 1991-2000, and September rainfall is down about 20% (2016-2025 against 1991-2000). Days above 25°C in September went from 4.9 to 7.0 a year on average.
Questions about Paço de Arcos in September
Is September a good time to visit Paço de Arcos?
Our rules rate September good for walking and cycling (highs of 23°C with about 4 rainy days).
How warm is Paço de Arcos in September?
Average highs are 23°C and lows 18°C. August averages 25°C and October 21°C.
Does it rain much in Paço de Arcos in September?
About 4 days have at least 1 mm of rain, with 31 mm in total over the month.
Is Paço de Arcos busy in September?
In September 2025, nights booked through online platforms in the Lisbon area were about 75% of the busiest month, which we count as high. The figure is for the whole region and leaves out hotels.
How long are the days in Paço de Arcos in September?
About 12 h 30 min from sunrise to sunset in the middle of the month.
Sources
Climate: ERA5-Land, Copernicus Climate Change Service (C3S) Climate Data Store, contains modified Copernicus information (CC BY 4.0). Crowds: Eurostat, nights spent in short-stay accommodation booked through online platforms (tour_ce_omn12) (CC BY 4.0). Place names and populations: GeoNames (CC BY 4.0). Climate averages cover 1991-2020. Daylight: calculated from the town's coordinates. Full methodology