Temperature
Pleasant by day, mild at night.
72°Ftypical September high
Typical range
September climate
September in Sintra
Portugal · Europe
Mild days and plenty of sun.
One of the best months here
Early to mid
Daytime high
72°F
Lows around 62°F
Rain
A few rainy days
Sun
11 h/day
Air feel
Comfortable
When to visit
Month-by-month fit
Best
Precipitation
A few rainy days, mostly brief and on-and-off. About 4 wet days, fewer than in most months.
14%wet-day frequency
AmountWet-day chance
Sunshine
Plenty of sun this month.
11.2 hSeptember sunshine
Heat & humidity by month
ComfortableSeptember
Easy airWarm airHot airHumid air
Hourly temperature pattern
In September, afternoons feel about 69° and nights feel near 61°.
Very coldColdCoolComfortableNight hours
Clear sky
Mostly clear skies this month.
64%September Clear sky
Clear skyCloud
Wind pattern
Breezy conditions are typical in September. More a comfort consideration than a planning concern.
10 mphSeptember Breezy
More detailIncludes daypart comfort
Typical September day
September late afternoons are around 72°F, easing to about 68°F in early evening.
Avg temp Typical range
Morning66°F
Rain7%
Cloud42%
Humid airLow
Sun intensityLow
Midday71°F
Rain10%
Cloud35%
Humid airLow
Sun intensityStrong
Late afternoon72°F
Rain8%
Cloud33%
Humid airLow
Sun intensityStrong
Early evening68°F
Rain6%
Cloud31%
Humid airLow
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 56 | 48 | 2.8 | 9 | 7.7 | 81 |
| Feb | 57 | 49 | 2.1 | 8 | 8.8 | 78 |
| Mar | 60 | 51 | 2.4 | 9 | 10.1 | 77 |
| Apr | 62 | 53 | 2.1 | 9 | 11.6 | 77 |
| May | 66 | 56 | 1.5 | 6 | 12.7 | 75 |
| Jun | 71 | 60 | 0.4 | 2 | 13.6 | 75 |
| Jul | 73 | 62 | 0.1 | 1 | 13.5 | 75 |
| Aug | 74 | 63 | 0.1 | 1 | 12.6 | 75 |
| Sep | 72 | 62 | 1.2 | 4 | 11.2 | 76 |
| Oct | 68 | 60 | 2.9 | 9 | 9.3 | 79 |
| Nov | 61 | 54 | 3.3 | 10 | 7.9 | 80 |
| Dec | 57 | 50 | 3.3 | 9 | 7.4 | 81 |
Similar climates
Similar
Similar travel styleValenciaSpainSimilar travel styleAmalfiItalySimilar travel styleDubrovnikCroatiaSimilar travel styleMadridSpain
Want a side-by-side climate view? Compare Sintra with Valencia.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 22, 2026
Data & methodology