Sintra (Cacém)
September
Weather in Sintra for September 2025
Your guide to Sintra weather in September - trends and predictions
In general, the average temperature in Sintra at the beginning of September is 23.6 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 26.3 °C by the end of September.
Sintra experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 36.4 mm.
Is September a good time to visit Sintra? check out the best time to travel to Sintra page.
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Temperatures
Rain 🌧️
More
21
Dry days
9
Rainy days
0
Snow days
25°/17°
Temperatures
20 km/h
Avg max wind
63 %
Avg humidity
Sintra in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2  22° | 3 22° | 4  26° | 5 24° | 6  22° | 7 24° |
| 8 24° | 9 24° | 10 23° | 11  25° | 12  24° | 13 29° | 14 28° |
| 15 29° | 16 28° | 17 27° | 18 24° | 19 24° | 20 23° | 21  22° |
| 22 23° | 23 24° | 24 25° | 25 25° | 26 25° | 27 24° | 28 27° |
| 29 29° | 30 29° |
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Temperatures trend during September in Sintra
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 25° /17° | 0 mm | 6 | |
| 2 Sept. | Patchy rain possible | 22° /16° | 1.8 mm | 5 | |
| 3 Sept. | Light rain shower | 22° /15° | 6.2 mm | 5 | |
| 4 Sept. | Light rain | 26° /15° | 7.2 mm | 6 | |
| 5 Sept. | Light rain shower | 24° /16° | 2.2 mm | 6 | |
| 6 Sept. | Cloudy | 22° /16° | 0 mm | 6 | |
| 7 Sept. | Patchy rain possible | 24° /16° | 0.3 mm | 6 | |
| 8 Sept. | Overcast | 24° /17° | 0 mm | 6 | |
| 9 Sept. | Light rain shower | 24° /17° | 1.6 mm | 6 | |
| 10 Sept. | Light rain shower | 23° /17° | 0.5 mm | 5 | |
| 11 Sept. | Partly cloudy | 25° /17° | 0 mm | 6 | |
| 12 Sept. | Sunny | 24° /17° | 0 mm | 6 | |
| 13 Sept. | Sunny | 29° /17° | 0 mm | 7 | |
| 14 Sept. | Sunny | 28° /19° | 0 mm | 7 | |
| 15 Sept. | Cloudy | 29° /19° | 0 mm | 7 | |
| 16 Sept. | Light rain shower | 28° /19° | 4.4 mm | 7 | |
| 17 Sept. | Light rain shower | 27° /18° | 7.2 mm | 6 | |
| 18 Sept. | Patchy rain possible | 24° /17° | 0.1 mm | 6 | |
| 19 Sept. | Sunny | 24° /16° | 0 mm | 7 | |
| 20 Sept. | Patchy rain possible | 23° /16° | 0.3 mm | 5 | |
| 21 Sept. | Moderate rain | 22° /18° | 2.5 mm | 5 | |
| 22 Sept. | Patchy rain possible | 23° /16° | 0.1 mm | 6 | |
| 23 Sept. | Sunny | 24° /15° | 0 mm | 6 | |
| 24 Sept. | Sunny | 25° /16° | 0 mm | 6 | |
| 25 Sept. | Sunny | 25° /18° | 0.3 mm | 6 | |
| 26 Sept. | Partly cloudy | 25° /17° | 1.6 mm | 6 | |
| 27 Sept. | Sunny | 24° /16° | 0.1 mm | 6 | |
| 28 Sept. | Sunny | 27° /15° | 0 mm | 7 | |
| 29 Sept. | Sunny | 29° /17° | 0 mm | 8 | |
| 30 Sept. | Sunny | 29° /19° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Sintra in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sintra forecast closer to your planned date for the most up-to-date weather information.
Sintra in September - FAQ
What are the expected maximum and minimum temperatures in Sintra during September?
During September, expect a variety of temperatures with highs around 25° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Sintra during September?
In September, Sintra can expect light to moderate rainfall, totaling 36.4 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Sintra during September?
The average wind speed in Sintra during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Sintra in September?
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
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Sintra
Explore the daily rainfall trends and prepare for Sintras September weather 💧
UV exposure in Sintra during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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