Sintra weather in August
August in Sintra: nice, dry, with clean air — an excellent time to visit.
#3 of 12 months in Sintra · #96 of 897 destinations to visit in August · comfort 92/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Sintra in August
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Sintra climate normals — August
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 17°C / 63°F | |
| Rainfall | 1 mm / 0 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 13.6 h | |
| Wind | 25 km/h / 15 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Sintra in August — FAQ
- Is August a good time to visit Sintra?
- August in Sintra: nice, dry, with clean air — an excellent time to visit. It ranks #3 of 12 months for Sintra on SeasonMap's comfort score (92/100).
- What is the weather like in Sintra in August?
- In August, Sintra averages a daily high of 21.8°C and a low of 17.2°C, with about 1.2 mm of rain over roughly 0.4 rainy days.
- What is the air quality in Sintra in August?
- Sintra has a mean US Air Quality Index of about 37 in August.