Best time to visit Sintra
The best time to visit Sintra is May–October, judged on twenty years of weather records and the events worth going for.
Sintra, Lisbon, Portugal
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 14.3 °C / 58 °F | 12.3 °C / 54 °F | 70 mm / 2.8 in | good month |
| February | 14.2 °C / 58 °F | 12.2 °C / 54 °F | 69 mm / 2.7 in | good month |
| March | 14.5 °C / 58 °F | 12.8 °C / 55 °F | 66 mm / 2.6 in | good month |
| April | 15.5 °C / 60 °F | 13.9 °C / 57 °F | 53 mm / 2.1 in | good month |
| May | 16.7 °C / 62 °F | 15.4 °C / 60 °F | 30 mm / 1.2 in | best month |
| June | 18 °C / 64 °F | 17 °C / 63 °F | 10 mm / 0.4 in | best month |
| July | 18.8 °C / 66 °F | 17.8 °C / 64 °F | 1 mm / 0 in | best month |
| August | 19.1 °C / 66 °F | 18.1 °C / 65 °F | 2 mm / 0.1 in | best month |
| September | 19.3 °C / 67 °F | 18.1 °C / 65 °F | 28 mm / 1.1 in | best month |
| October | 18.9 °C / 66 °F | 17.4 °C / 63 °F | 71 mm / 2.8 in | best month |
| November | 16.8 °C / 62 °F | 15 °C / 59 °F | 96 mm / 3.8 in | good month |
| December | 15.3 °C / 60 °F | 13.2 °C / 56 °F | 86 mm / 3.4 in | good month |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: good
- FFebruary: good
- MMarch: good
- AApril: good
- MMay: best
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: best
- NNovember: good
- DDecember: good
- Best
- May–October
- Good
- November–April
Why these months
January · good
In its favour: share of daylight that is sunny 80%, precipitation 70 mm / 2.8 in, average daily high 14.3 °C / 58 °F, days with heavy rain 2.4 days, average daily low 12.3 °C / 54 °F, wet days 10.4 days.
Against: feels like (high) 11.5 °C / 53 °F, relative humidity 77%.
February · good
In its favour: share of daylight that is sunny 81%, precipitation 69 mm / 2.7 in, average daily high 14.2 °C / 58 °F, days with heavy rain 2.4 days, wet days 9.2 days, average daily low 12.2 °C / 54 °F.
Against: feels like (high) 11.5 °C / 53 °F, relative humidity 78%.
March · good
In its favour: share of daylight that is sunny 85%, precipitation 66 mm / 2.6 in, average daily high 14.5 °C / 58 °F, days with heavy rain 1.9 days, wet days 9.3 days, average daily low 12.8 °C / 55 °F.
Against: feels like (high) 12.3 °C / 54 °F, relative humidity 78%.
April · good
In its favour: precipitation 53 mm / 2.1 in, share of daylight that is sunny 89%, feels like (high) 14.2 °C / 58 °F, average daily high 15.5 °C / 60 °F, days with heavy rain 1.4 days, wet days 8.2 days, average daily low 13.9 °C / 57 °F.
Against: relative humidity 81%.
May · best
In its favour: feels like (high) 16 °C / 61 °F, precipitation 30 mm / 1.2 in, share of daylight that is sunny 90%, average daily high 16.7 °C / 62 °F, wet days 4 days, days with heavy rain 1.1 days, average daily low 15.4 °C / 60 °F.
Against: relative humidity 82%.
June · best
In its favour: feels like (high) 18 °C / 64 °F, average daily high 18 °C / 64 °F, precipitation 10 mm / 0.4 in, share of daylight that is sunny 92%, wet days 2.5 days, days with heavy rain 0.1 days, average daily low 17 °C / 63 °F.
Against: relative humidity 86%.
July · best
In its favour: feels like (high) 19 °C / 66 °F, average daily high 18.8 °C / 66 °F, precipitation 1 mm / 0 in, share of daylight that is sunny 93%, wet days 0.6 days, days with heavy rain 0 days, average daily low 17.8 °C / 64 °F.
Against: relative humidity 89%.
August · best
In its favour: feels like (high) 19.5 °C / 67 °F, average daily high 19.1 °C / 66 °F, precipitation 2 mm / 0.1 in, share of daylight that is sunny 93%, wet days 0.5 days, days with heavy rain 0 days, average daily low 18.1 °C / 65 °F.
Against: relative humidity 89%.
September · best
In its favour: feels like (high) 19.9 °C / 68 °F, average daily high 19.3 °C / 67 °F, precipitation 28 mm / 1.1 in, share of daylight that is sunny 91%, wet days 3.1 days, days with heavy rain 0.8 days, average daily low 18.1 °C / 65 °F.
Against: relative humidity 88%.
October · best
In its favour: feels like (high) 18.8 °C / 66 °F, average daily high 18.9 °C / 66 °F, share of daylight that is sunny 85%, precipitation 71 mm / 2.8 in, wet days 8.3 days, days with heavy rain 2.9 days, average daily low 17.4 °C / 63 °F.
Against: relative humidity 84%.
November · good
In its favour: feels like (high) 15 °C / 59 °F, share of daylight that is sunny 79%, average daily high 16.8 °C / 62 °F, precipitation 96 mm / 3.8 in, average daily low 15 °C / 59 °F, days with heavy rain 3.4 days, wet days 10.4 days.
Against: relative humidity 78%.
December · good
In its favour: share of daylight that is sunny 80%, precipitation 86 mm / 3.4 in, feels like (high) 12.9 °C / 55 °F, average daily high 15.3 °C / 60 °F, days with heavy rain 3.1 days, wet days 9.8 days, average daily low 13.2 °C / 56 °F.
Against: relative humidity 78%.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is La Covatilla, 360 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 11.5 °C | 11.5 °C | 12.3 °C | 14.2 °C | 16 °C | 18 °C | 19 °C | 19.5 °C | 19.9 °C | 18.8 °C | 15 °C | 12.9 °C |
| Days with heavy rain | 2.4 days | 2.4 days | 1.9 days | 1.4 days | 1.1 days | 0.1 days | 0 days | 0 days | 0.8 days | 2.9 days | 3.4 days | 3.1 days |
| Time rain usually falls | 9 am | 12 pm | 8 am | 8 am | 6 am | 7 am | 1 am | 8 pm | 12 pm | 7 am | 12 pm | 3 am |
| Sunshine per day | 7.9 h | 8.8 h | 10.2 h | 11.7 h | 12.8 h | 13.6 h | 13.5 h | 12.7 h | 11.3 h | 9.5 h | 8 h | 7.6 h |
| Relative humidity | 77% | 78% | 78% | 81% | 82% | 86% | 89% | 89% | 88% | 84% | 78% | 78% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 9.9 µg/m³ | 12.3 µg/m³ | 9.4 µg/m³ | 9.3 µg/m³ | 8.5 µg/m³ | 9.9 µg/m³ | 7.6 µg/m³ | 8.6 µg/m³ | 8.1 µg/m³ | 10.2 µg/m³ | 9.5 µg/m³ | 9 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 18 µg/m³ | 21.8 µg/m³ | 14.8 µg/m³ | 15.1 µg/m³ | 12.5 µg/m³ | 14.4 µg/m³ | 11.1 µg/m³ | 11.9 µg/m³ | 12.6 µg/m³ | 16.5 µg/m³ | 16 µg/m³ | 16.3 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.
World Heritage sites nearby
UNESCO World Heritage sites within 25 km, nearest first.
- Cultural Landscape of Sintra
5 km away
- Royal Building of Mafra
16 km away