Month guide · Grândola, Portugal
Grândola in September: weather and what to expect
In September, Grândola averages highs of 26°C and lows of 16°C, with about 4 rainy days and 29 mm of rain. Highs are 3°C cooler than in August and 4°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 26°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 3°C over the month. A day above 35°C happens in roughly 1 September in 6.
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 Grândola |
|---|---|---|---|
| Ferreira do Alentejo, Alentejo | 29°C | 4 | 42 km |
| Beringel, Alentejo | 28°C | 4 | 53 km |
| Ermidas, Lisbon area | 28°C | 4 | 26 km |
| Aljustrel, Alentejo | 28°C | 4 | 48 km |
| Alvito, Alentejo | 28°C | 5 | 51 km |
The nearest towns with a warmer September. Distances are in a straight line.
How September is changing
Town-level · ERA5-LandSeptember highs are 1.9°C warmer than in 1991-2000, and September rainfall is down about 35% (2016-2025 against 1991-2000). Days above 30°C in September went from 2.5 to 5.2 a year on average.
Questions about Grândola in September
Is September a good time to visit Grândola?
Our rules rate September good for walking and cycling (highs of 26°C with about 4 rainy days).
How warm is Grândola in September?
Average highs are 26°C and lows 16°C. August averages 29°C and October 22°C.
Does it rain much in Grândola in September?
About 4 days have at least 1 mm of rain, with 29 mm in total over the month.
Is Grândola 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 Grândola 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