Weather in Sintra for September 2026
Yellow High Temperature Warning - See hour by hour.
So far, September 2026 in Sintra shows a warmer trend than usual by 3 °C.
Expect cooler weather in the next days in Sintra with the forecast suggesting a temperature of 27 °C, lower than the historical average.
In general, the average temperature in Sintra at the beginning of September is 26 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 25.9 °C by the end of September.
With an average of 4 rainy days, Sintra experiences minimal rainfall in September.
Is September a good time to visit Sintra? check out the best time to travel to Sintra page.
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Sintra Weather September
Temperatures trend during September in Sintra
September weather in Sintra day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 25° /16° | 0 mm | 6 | |
| 2 Sept. |  Patchy rain possible | 25° /16° | 0.9 mm | 6 | |
| 3 Sept. | Light rain shower | 27° /17° | 3.1 mm | 6 | |
| 4 Sept. | Overcast | 27° /18° | 3.6 mm | 5 | |
| 5 Sept. | Light rain shower | 27° /18° | 1.3 mm | 6 | |
| 6 Sept. |  Cloudy | 25° /17° | 0 mm | 6 | |
| 7 Sept. | Patchy rain possible | 26° /17° | 1.3 mm | 6 | |
| 8 Sept. |  Sunny | 24° /16° | 0 mm | 6 | |
| 9 Sept. | Light rain shower | 23° /17° | 0.8 mm | 6 | |
| 10 Sept. | Light rain shower | 25° /17° | 0.3 mm | 6 | |
| 11 Sept. | Sunny | 27° /17° | 0 mm | 7 | |
| 12 Sept. | Sunny | 28° /18° | 0 mm | 7 | |
| 13 Sept. | Sunny | 29° /18° | 0 mm | 7 | |
| 14 Sept. | Sunny | 29° /19° | 0 mm | 7 | |
| 15 Sept. | Sunny | 28° /19° | 0 mm | 7 | |
| 16 Sept. | Sunny | 27° /17° | 2.2 mm | 7 | |
| 17 Sept. | Light rain shower | 28° /17° | 3.6 mm | 7 | |
| 18 Sept. | Patchy rain possible | 27° /18° | 0.1 mm | 6 | |
| 19 Sept. | Sunny | 27° /18° | 0.1 mm | 6 | |
| 20 Sept. | Patchy rain possible | 24° /16° | 0.2 mm | 6 | |
| 21 Sept. | Sunny | 32° /21° | 0 mm | 6.5 | |
| 22 Sept. | Sunny | 32° /24° | 0 mm | 6.5 | |
| 23 Sept. | Sunny | 34° /23° | 0 mm | 6.2 | |
| 24 Sept. | Sunny | 31° /21° | 0 mm | 6.2 | |
| 25 Sept. | Sunny | 28° /19° | 0 mm | 7 | |
| 26 Sept. | Overcast | 25° /18° | 0 mm | 6 | |
| 27 Sept. | Sunny | 22° /17° | 0 mm | 6 | |
| 28 Sept. | Sunny | 25° /17° | 0 mm | 6 | |
| 29 Sept. |  Partly cloudy | 24° /17° | 0 mm | 6 | |
| 30 Sept. | Overcast | 26° /16° | 0 mm | 6 | |
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Sintra weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Sunny | Sunny | Patchy rain possible |
| Temperatures | 28°/18° | 25°/17° | 23°/17° |
| Rainfall | 0 mm | 27 mm | 68 mm |
| Wind | 23.4 km/h | 20.8 km/h | 19.2 km/h |
| Humidity | 59% | 62% | 67% |
| Rainy days | 0 days | 4 days | 9 days |
| Dry days | 31 days | 26 days | 22 days |
Planning a trip to Sintra? Discover the best time to visit
Sintra in September - FAQ
What are the expected maximum and minimum temperatures in Sintra during September?
How much rainfall should be expected in Sintra during September?
What are the typical wind conditions in Sintra during September?
September rainfall patterns in Sintra
UV exposure in Sintra during September
What to pack to Sintra in September?
Mild & changeable · highs around 25 °C, occasional showers
As you prepare for your trip to Sintra in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Sintra, during September, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
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Where is Sintra?Get accurate weather forecasts for Sintra, located at latitude 38.767 and longitude -9.298. Stay updated with localized weather information tailored for Sintra.