Month guide · Arcos de Valdevez, Portugal
Arcos de Valdevez in September: weather and what to expect
In September, Arcos de Valdevez averages highs of 25°C and lows of 15°C, with about 9 rainy days and 103 mm of rain. Highs are 3°C cooler than in August and 4°C warmer than in October. Crowds in Norte are high.
Is September a good time to visit?
Good for
No verdicts for Arcos de Valdevez in September yet. They only use climate values that are precise enough to judge with.
Not ideal for
Nothing stands out as a weaker fit.
Daily highs through September
Town-level · ERA5-Land 1991-2020Highs fall about 4°C over the month. Nights below 10°C in about 1 in 2.
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 Arcos de Valdevez |
|---|---|---|---|
| Vila Velha de Ródão, Centro | 28°C | 5 | 251 km |
| Montalvo, Alentejo | 28°C | 5 | 263 km |
| Montalvinho, Alentejo | 28°C | 5 | 263 km |
| Tomar, Alentejo | 28°C | 5 | 250 km |
| Sardoal, Alentejo | 27°C | 5 | 258 km |
The nearest towns with a warmer September. Distances are in a straight line.
How September is changing
Town-level · ERA5-LandSeptember highs are 2.2°C warmer than in 1991-2000, and September rainfall is down about 40% (2016-2025 against 1991-2000). Days above 25°C in September went from 9.9 to 15 a year on average.
Questions about Arcos de Valdevez in September
How warm is Arcos de Valdevez in September?
Average highs are 25°C and lows 15°C. August averages 28°C and October 21°C.
Does it rain much in Arcos de Valdevez in September?
About 9 days have at least 1 mm of rain, with 103 mm in total over the month.
Is Arcos de Valdevez busy in September?
In September 2025, nights booked through online platforms in Norte were about 60% 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 Arcos de Valdevez in September?
About 12 h 33 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