Weather in Piraeus for September 2025
So far, September 2025 in Piraeus is slightly warmer than the historical average by 0.8 °C.
Expect cooler weather in the next days in Piraeus with the forecast suggesting a temperature of 26.8 °C, lower than the historical average.
In general, the average temperature in Piraeus at the beginning of September is 29.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 26.4 °C by the end of September.
Piraeus experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 41 mm.
Is September a good time to visit Piraeus? check out the best time to travel to Piraeus page.
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Piraeus Weather September
Temperatures trend during September in Piraeus
September weather in Piraeus day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 30° /23° | 0.1 mm | 7 | |
| 2 Sept. | Sunny | 31° /23° | 0 mm | 8 | |
| 3 Sept. | Sunny | 31° /24° | 0 mm | 8 | |
| 4 Sept. |  Patchy rain possible | 30° /23° | 0.1 mm | 7 | |
| 5 Sept. |  Moderate or heavy rain shower | 28° /22° | 8 mm | 7 | |
| 6 Sept. | Sunny | 30° /23° | 3.4 mm | 7 | |
| 7 Sept. | Sunny | 29° /23° | 0 mm | 7 | |
| 8 Sept. | Sunny | 28° /22° | 0 mm | 7 | |
| 9 Sept. | Sunny | 28° /22° | 0 mm | 7 | |
| 10 Sept. | Sunny | 28° /22° | 0.4 mm | 7 | |
| 11 Sept. | Sunny | 27° /22° | 1.2 mm | 7 | |
| 12 Sept. | Sunny | 29° /22° | 0 mm | 7 | |
| 13 Sept. | Sunny | 29° /21° | 0 mm | 7 | |
| 14 Sept. | Sunny | 28° /22° | 0 mm | 7 | |
| 15 Sept. | Sunny | 29° /22° | 0 mm | 1.5 | |
| 16 Sept. | Sunny | 30° /23° | 0 mm | 1.7 | |
| 17 Sept. | Sunny | 29° /23° | 0 mm | 1.6 | |
| 18 Sept. | Sunny | 24° /20° | 0 mm | 1.7 | |
| 19 Sept. | Sunny | 24° /18° | 0 mm | 2 | |
| 20 Sept. | Sunny | 25° /20° | 0 mm | 6 | |
| 21 Sept. | Sunny | 25° /19° | 0 mm | 6 | |
| 22 Sept. | Sunny | 28° /19° | 0 mm | 6 | |
| 23 Sept. | Sunny | 27° /21° | 0 mm | 6 | |
| 24 Sept. | Sunny | 27° /21° | 0 mm | 6 | |
| 25 Sept. | Sunny | 28° /21° | 0 mm | 6 | |
| 26 Sept. | Sunny | 27° /21° | 0 mm | 6 | |
| 27 Sept. | Patchy rain possible | 26° /22° | 0.2 mm | 5 | |
| 28 Sept. | Patchy rain possible | 26° /22° | 1.2 mm | 5 | |
| 29 Sept. | Patchy rain possible | 27° /21° | 0.1 mm | 7 | |
| 30 Sept. |  Thundery outbreaks possible | 24° /19° | 0 mm | 6 | |
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Piraeus weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Sunny | Sunny | Sunny |
| Temperatures | 32°/24° | 27°/22° | 24°/17° |
| Rainfall | 4 mm | 41 mm | 0 mm |
| Wind | 21.5 km/h | 19 km/h | 17.1 km/h |
| Humidity | 45% | 52% | 56% |
| Rainy days | 3 days | 6 days | 0 days |
| Dry days | 28 days | 24 days | 31 days |
Planning a trip to Piraeus? Discover the best time to visit
Piraeus in September - FAQ
What to pack to Piraeus in September?
As you prepare for your trip to Piraeus 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 Piraeus, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in Piraeus
UV exposure in Piraeus during September
Quick links
Where is Piraeus?Get accurate weather forecasts for Piraeus, located at latitude 37.942 and longitude 23.646. Stay updated with localized weather information tailored for Piraeus.