Month guide · Oiã, Portugal
Oiã in September: weather and what to expect
September is the last month of the year with average highs above 25°C in Oiã. September highs in Oiã are now 2.1°C warmer than in 1991-2000. In September, Oiã averages highs of 25°C and lows of 15°C, with about 7 rainy days and 59 mm of rain. Our rules rate it good for walking and cycling. Crowds in Centro are medium.
Is September a good time to visit?
Good for
- Walking and cyclingHighs of 25°C with about 7 rainy days
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 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 Oiã |
|---|---|---|---|
| Tomar, Oeste e Vale do Tejo | 28°C | 5 | 105 km |
| Sardoal, Oeste e Vale do Tejo | 27°C | 5 | 117 km |
| Torres Novas, Oeste e Vale do Tejo | 27°C | 5 | 119 km |
| Madalena (Tomar), Oeste e Vale do Tejo | 27°C | 5 | 108 km |
| Meia Via, Oeste e Vale do Tejo | 27°C | 5 | 119 km |
The nearest towns with a warmer September. Distances are in a straight line.
How September is changing
Town-level · ERA5-LandSeptember highs are 2.1°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 2.1 to 5.0 a year on average.
Questions about Oiã in September
Is September a good time to visit Oiã?
Our rules rate September good for walking and cycling (highs of 25°C with about 7 rainy days).
How warm is Oiã in September?
Average highs are 25°C and lows 15°C. August averages 28°C and October 21°C.
Does it rain much in Oiã in September?
About 7 days have at least 1 mm of rain, with 59 mm in total over the month.
Is Oiã busy in September?
In September 2025, nights booked through online platforms in Centro were about 40% of the busiest month, which we count as medium. The figure is for the whole region and leaves out hotels.
How long are the days in Oiã in September?
About 12 h 32 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