Month guide · Mem Martins, Portugal
Mem Martins in September: weather and what to expect
In September, Mem Martins averages highs of 23°C and lows of 17°C, with about 5 rainy days and 32 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 5 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 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 Mem Martins |
|---|---|---|---|
| Marinhais, Oeste e Vale do Tejo | 28°C | 5 | 62 km |
| Benavente, Oeste e Vale do Tejo | 28°C | 5 | 51 km |
| Salvaterra de Magos, Oeste e Vale do Tejo | 28°C | 5 | 54 km |
| Samora Correia, Oeste e Vale do Tejo | 27°C | 5 | 44 km |
| Pontével, Oeste e Vale do Tejo | 27°C | 5 | 59 km |
The nearest towns with a warmer September. Distances are in a straight line.
How September is changing
Town-level · ERA5-LandSeptember highs are 0.9°C warmer than in 1991-2000, and September rainfall is down about 15% (2016-2025 against 1991-2000). Days above 25°C in September went from 2.8 to 5.0 a year on average.
Questions about Mem Martins in September
Is September a good time to visit Mem Martins?
Our rules rate September good for walking and cycling (highs of 23°C with about 5 rainy days).
How warm is Mem Martins in September?
Average highs are 23°C and lows 17°C. August averages 24°C and October 20°C.
Does it rain much in Mem Martins in September?
About 5 days have at least 1 mm of rain, with 32 mm in total over the month.
Is Mem Martins 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 Mem Martins 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