Click on a day for an hourly weather forecast
The temperatures in Portugal in September are comfortable with low of 17°C and and high up to 27°C.
You can expect a few rainy days in Portugal during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Portugal in September 2025.
If you’re planning to visit Portugal in the near future, we highly recommend that you review the 14 day weather forecast for Portugal before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 9° | 5 | 26 | 0 | 76 mm | Good | Portugal in January |
| February | 16° / 9° | 4 | 24 | 0 | 83 mm | Good | Portugal in February |
| March | 18° / 10° | 5 | 26 | 0 | 88 mm | Good | Portugal in March |
| April | 19° / 12° | 4 | 26 | 0 | 81 mm | Good | Portugal in April |
| May | 23° / 14° | 3 | 28 | 0 | 53 mm | Perfect | Portugal in May |
| June | 25° / 16° | 1 | 29 | 0 | 16 mm | Perfect | Portugal in June |
| July | 28° / 17° | 0 | 31 | 0 | 4 mm | Perfect | Portugal in July |
| August | 29° / 17° | 0 | 31 | 0 | 4 mm | Good | Portugal in August |
| September | 27° / 17° | 2 | 28 | 0 | 38 mm | Perfect | Portugal in September |
| October | 24° / 16° | 3 | 28 | 0 | 94 mm | Perfect | Portugal in October |
| November | 18° / 12° | 6 | 24 | 0 | 109 mm | Good | Portugal in November |
| December | 16° / 10° | 4 | 27 | 0 | 99 mm | Good | Portugal in December |