Weather in Portugal for September 2025
In general, the average temperature in Portugal at the beginning of September is 25.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 24.6 °C by the end of September.
The climate of Portugal in September is notably wet, with an average of 13 rainy days, and a total of 50 mm of precipitation.
Is September a good time to visit Portugal? check out the best time to travel to Portugal page.
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Portugal in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2 25° | 3  24° | 4 26° | 5  25° | 6  25° | 7 25° |
| 8 25° | 9  26° | 10 26° | 11 25° | 12 25° | 13  26° | 14 25° |
| 15 26° | 16 26° | 17 26° | 18 25° | 19 25° | 20 24° | 21 25° |
| 22 25° | 23  24° | 24 24° | 25 24° | 26 25° | 27 24° | 28 24° |
| 29 25° | 30 26° |
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Temperatures trend during September in Portugal
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Patchy rain possible | 26° /17° | 0.1 mm | 6 | |
| 2 Sept. | Patchy rain possible | 25° /16° | 1.7 mm | 6 | |
| 3 Sept. | Sunny | 24° /16° | 3.6 mm | 6 | |
| 4 Sept. | Sunny | 26° /16° | 3 mm | 6 | |
| 5 Sept. | Partly cloudy | 25° /17° | 1 mm | 6 | |
| 6 Sept. | Cloudy | 25° /17° | 0 mm | 6 | |
| 7 Sept. | Patchy rain possible | 25° /17° | 0.6 mm | 6 | |
| 8 Sept. | Patchy rain possible | 25° /17° | 0.4 mm | 6 | |
| 9 Sept. | Overcast | 26° /18° | 0.8 mm | 6 | |
| 10 Sept. | Partly cloudy | 26° /18° | 0.2 mm | 6 | |
| 11 Sept. | Partly cloudy | 25° /17° | 0.1 mm | 6 | |
| 12 Sept. | Sunny | 25° /17° | 5.3 mm | 6 | |
| 13 Sept. | Moderate or heavy rain shower | 26° /18° | 8.2 mm | 6 | |
| 14 Sept. | Sunny | 25° /19° | 10.5 mm | 6 | |
| 15 Sept. | Moderate rain at times | 26° /18° | 0.9 mm | 6 | |
| 16 Sept. | Partly cloudy | 26° /18° | 2.3 mm | 7 | |
| 17 Sept. | Sunny | 26° /18° | 2.7 mm | 7 | |
| 18 Sept. | Sunny | 25° /17° | 0.1 mm | 6 | |
| 19 Sept. | Sunny | 25° /17° | 1.8 mm | 6 | |
| 20 Sept. | Patchy rain possible | 24° /17° | 0.2 mm | 6 | |
| 21 Sept. | Patchy rain possible | 25° /18° | 1.3 mm | 6 | |
| 22 Sept. | Sunny | 25° /17° | 0.2 mm | 7 | |
| 23 Sept. | Heavy rain at times | 24° /16° | 3.4 mm | 6 | |
| 24 Sept. | Patchy rain possible | 24° /16° | 0.6 mm | 6 | |
| 25 Sept. | Patchy rain possible | 24° /18° | 0.3 mm | 6 | |
| 26 Sept. | Cloudy | 25° /17° | 0.7 mm | 6 | |
| 27 Sept. | Sunny | 24° /16° | 0 mm | 6 | |
| 28 Sept. | Sunny | 24° /16° | 0 mm | 6 | |
| 29 Sept. | Sunny | 25° /16° | 0.1 mm | 6 | |
| 30 Sept. | Sunny | 26° /17° | 0 mm | 7 | |
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Guide for Portugal in September
In September, Portugal experiences a transition from the warm summer weather to the cooler temperatures of autumn.
At the beginning of the month, the southern region, including popular destinations like the Algarve, typically enjoys warm and sunny days with temperatures averaging around 25° during the day and 17° at night.
The northern region, including Porto and the Douro Valley, experiences similar temperatures but with a slightly higher chance of rainfall.
As the month progresses, Portugal begins to feel the effects of the changing season. By the end of September, temperatures start to decrease gradually. In the southern region, daytime temperatures may drop to around 22° while nighttime temperatures can fall to around 14°.
In the northern region, temperatures may also decrease slightly, with daytime averages around 20° and nighttime temperatures around 12°. Additionally, there is a higher likelihood of rainfall in the northern areas as autumn sets in.
Overall, September in Portugal offers a pleasant transition from summer to autumn, with warm temperatures at the beginning of the month giving way to cooler, more comfortable weather by the end.
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Portugal in September - FAQ
What to pack to Portugal in September?
As you prepare for your trip to Portugal 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 Portugal, 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 Portugal
UV exposure in Portugal during September
Quick links
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