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