Bilbao
September
Weather in Bilbao for September 2025
Your guide to Bilbao weather in September - trends and predictions
In general, the average temperature in Bilbao at the beginning of September is 24.4 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 24.1 °C by the end of September.
The climate of Bilbao in September is notably wet, with an average of 15 rainy days.
Is September a good time to visit Bilbao? check out the best time to travel to Bilbao page.
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15
Dry days
15
Rainy days
0
Snow days
26°/17°
Temperatures
12 km/h
Avg max wind
72 %
Avg humidity
Bilbao in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2  22° | 3  22° | 4  26° | 5  25° | 6 25° | 7 26° |
| 8 26° | 9  27° | 10 25° | 11 23° | 12 20° | 13  20° | 14 22° |
| 15 24° | 16 25° | 17  24° | 18  24° | 19 25° | 20 26° | 21 23° |
| 22 19° | 23 21° | 24 25° | 25 25° | 26 23° | 27 22° | 28 23° |
| 29 25° | 30 26° |
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Temperatures trend during September in Bilbao
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° | 1.6 mm | 6 | |
| 2 Sept. | Moderate or heavy rain shower | 22° /17° | 15.5 mm | 5 | |
| 3 Sept. | Partly cloudy | 22° /16° | 2.4 mm | 6 | |
| 4 Sept. | Patchy rain possible | 26° /18° | 9 mm | 6 | |
| 5 Sept. | Sunny | 25° /16° | 9.5 mm | 6 | |
| 6 Sept. | Patchy rain possible | 25° /16° | 7.6 mm | 6 | |
| 7 Sept. | Patchy rain possible | 26° /17° | 1.7 mm | 6 | |
| 8 Sept. | Patchy rain possible | 26° /17° | 1.2 mm | 7 | |
| 9 Sept. | Patchy light rain with thunder | 27° /16° | 1.8 mm | 6 | |
| 10 Sept. | Patchy rain possible | 25° /17° | 3.9 mm | 6 | |
| 11 Sept. | Light rain shower | 23° /15° | 17 mm | 6 | |
| 12 Sept. | Moderate or heavy rain shower | 20° /15° | 13.9 mm | 5 | |
| 13 Sept. | Cloudy | 20° /14° | 1.2 mm | 5 | |
| 14 Sept. | Cloudy | 22° /13° | 0 mm | 5 | |
| 15 Sept. | Sunny | 24° /14° | 0 mm | 6 | |
| 16 Sept. | Partly cloudy | 25° /15° | 0 mm | 7 | |
| 17 Sept. | Patchy light rain | 24° /15° | 1.5 mm | 5 | |
| 18 Sept. | Thundery outbreaks possible | 24° /15° | 0.1 mm | 6 | |
| 19 Sept. | Partly cloudy | 25° /14° | 1.6 mm | 6 | |
| 20 Sept. | Sunny | 26° /16° | 1.3 mm | 6 | |
| 21 Sept. | Light rain shower | 23° /15° | 6.3 mm | 5 | |
| 22 Sept. | Light rain shower | 19° /14° | 4.6 mm | 4 | |
| 23 Sept. | Patchy rain possible | 21° /12° | 0.5 mm | 5 | |
| 24 Sept. | Sunny | 25° /13° | 0.1 mm | 6 | |
| 25 Sept. | Sunny | 25° /15° | 0.6 mm | 7 | |
| 26 Sept. | Cloudy | 23° /15° | 4 mm | 5 | |
| 27 Sept. | Overcast | 22° /15° | 3.5 mm | 5 | |
| 28 Sept. | Sunny | 23° /13° | 2.4 mm | 6 | |
| 29 Sept. | Patchy rain possible | 25° /14° | 0 mm | 6 | |
| 30 Sept. | Sunny | 26° /15° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Bilbao 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 Bilbao forecast closer to your planned date for the most up-to-date weather information.
Bilbao in September - FAQ
What are the expected maximum and minimum temperatures in Bilbao during September?
During September, expect a variety of temperatures with highs around 26° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Bilbao during September?
Significant rainfall exceeding 121.9 mm is expected in Bilbao during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Bilbao during September?
The average wind speed in Bilbao during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Bilbao in September?
As you prepare for your trip to Bilbao 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 Bilbao, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- 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
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
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