Click on a day for an hourly weather forecast
The temperatures in Sintra in August are comfortable with low of 18°C and and high up to 25°C.
As it is almost never rain during August in Sintra the weather is perfect for hanging out outside and exploring all that Sintra has to offer.
Our weather forecast can give you a great sense of what weather to expect in Sintra in August 2025.
If you’re planning to visit Sintra in the near future, we highly recommend that you review the 14 day weather forecast for Sintra before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 10° | 5 | 26 | 0 | 89 mm | Good | Sintra in January |
| February | 15° / 10° | 5 | 24 | 0 | 89 mm | Good | Sintra in February |
| March | 17° / 11° | 6 | 25 | 0 | 97 mm | Good | Sintra in March |
| April | 18° / 12° | 5 | 25 | 0 | 89 mm | Good | Sintra in April |
| May | 21° / 15° | 3 | 28 | 0 | 60 mm | Good | Sintra in May |
| June | 23° / 17° | 1 | 29 | 0 | 20 mm | Perfect | Sintra in June |
| July | 25° / 18° | 0 | 31 | 0 | 5 mm | Perfect | Sintra in July |
| August | 25° / 18° | 0 | 31 | 0 | 7 mm | Perfect | Sintra in August |
| September | 25° / 18° | 2 | 28 | 0 | 49 mm | Perfect | Sintra in September |
| October | 22° / 17° | 4 | 27 | 0 | 109 mm | Good | Sintra in October |
| November | 18° / 14° | 6 | 24 | 0 | 131 mm | Good | Sintra in November |
| December | 16° / 11° | 5 | 26 | 0 | 113 mm | Good | Sintra in December |